LAS - LON

£281 Find Cheap Flights from Las Vegas to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Las Vegas to London departing on 20/2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to London

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Las Vegas to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Las Vegas to London, as well as popular online travel agencies
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest return fare
£454
Overall average: £552
Multiple Airlines
Mon 19/1Mon 26/1
LAS - LHR • 1 stop
Cheapest direct flights
£456
Typical prices: £500-£564
Virgin Atlantic
Wed 4/2Wed 11/2
LAS - LHR • Direct
Our travellers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Finnair's Economy Comfort offers extra legroom.
LAS provides a complimentary kerbside concierge.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Delta
Cheapest • from £458 (return)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
LAS-LGW
Cheapest • 9% average savings
LAS-LHR
Most popular
Insights
Insights
Insights
Insights
When to book
4 weeks
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 36% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 30% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to London!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Las Vegas to London (LAS-LON)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Las Vegas to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Las Vegas to London

Mon, 19 Jan - Mon, 26 Jan
Multiple Airlines Logo
12:10 - 06:30
LAS
-
LHR
34h 20m1 stop
Multiple Airlines Logo
06:50 - 20:39
LHR
-
LAS
21h 49m2 stops
£454Multiple Airlines
Sat, 17 Jan - Fri, 30 Jan
Multiple Airlines Logo
11:01 - 07:55
LAS
-
LHR
12h 54m1 stop
Multiple Airlines Logo
13:45 - 20:52
LHR
-
LAS
15h 07m1 stop
£455Multiple Airlines
Sun, 18 Jan - Sat, 31 Jan
Air Canada Logo
06:15 - 11:50
LAS
-
LHR
21h 35m1 stop
Air Canada Logo
14:30 - 22:27
LHR
-
LAS
15h 57m1 stop
£456Air Canada
Wed, 4 Feb - Wed, 11 Feb
Virgin Atlantic Logo
20:45 - 14:40
LAS
-
LHR
9h 55mdirect
Virgin Atlantic Logo
16:00 - 18:50
LHR
-
LAS
10h 50mdirect
£456Virgin Atlantic
Tue, 3 Feb - Tue, 10 Feb
Multiple Airlines Logo
20:45 - 14:40
LAS
-
LHR
9h 55mdirect
Multiple Airlines Logo
08:40 - 14:15
LHR
-
LAS
13h 35m1 stop
£457Multiple Airlines
Tue, 24 Feb - Sun, 1 Mar
Lufthansa Logo
13:10 - 18:35
LAS
-
LHR
21h 25m2 stops
Lufthansa Logo
09:30 - 20:55
LHR
-
LAS
19h 25m2 stops
£458Lufthansa
Thu, 22 Jan - Mon, 26 Jan
Air Canada Logo
06:15 - 10:10
LAS
-
LHR
19h 55m2 stops
Air Canada Logo
12:05 - 20:39
LHR
-
LAS
40h 34m2 stops
£459Air Canada
Wed, 21 Jan - Thu, 29 Jan
Delta Logo
07:00 - 08:05
LAS
-
LHR
17h 05m1 stop
Delta Logo
06:30 - 14:15
LHR
-
LAS
15h 45m1 stop
£461Delta
Tue, 20 Jan - Tue, 27 Jan
Virgin Atlantic Logo
16:05 - 16:35
LAS
-
LCY
16h 30m1 stop
Virgin Atlantic Logo
09:20 - 14:15
LCY
-
LAS
12h 55m1 stop
£484Virgin Atlantic
Tue, 10 Feb - Tue, 17 Feb
Lufthansa Logo
11:54 - 17:35
LAS
-
LCY
21h 41m2 stops
Lufthansa Logo
18:15 - 12:05
LCY
-
LAS
25h 50m1 stop
£490Lufthansa
Booking Insights

KAYAK's insights & trends for Las Vegas to London flights

Get data-powered insights and trends into flights from Las Vegas to London to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Las Vegas to London flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from Las Vegas to London costs £388 on the route between Las Vegas (LAS) and London Gatwick Airport (LGW). Over the past month, this route was, on average, 9% cheaper than other Las Vegas-London routes. The most popular route is between Las Vegas (LAS) and London Heathrow Airport (LHR).

What’s the cheapest day of the week to fly from Las Vegas to London?

The average price of all round-trip flights from Las Vegas to London clicked on KAYAK for each day over the last 12 months.

For Las Vegas to London, Sunday is the cheapest day to fly on average and Thursday is the most expensive. Flying from London back to Las Vegas, the best deals are generally found on Tuesday, with Sunday being the most expensive.

What is the cheapest month to fly from Las Vegas to London?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Las Vegas to London, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Las Vegas to London is February, where tickets cost £427 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £883 and £794 respectively.

Can I save money by flying with a stopover from Las Vegas to London?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 1 stop stopover the cheapest option at £458 on average.

How far in advance should I book a flight from Las Vegas to London?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Las Vegas to London, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Las Vegas to London, you should book around 4 weeks before departure, which saves you about 36% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Expert advice

Expert advice for your flight from Las Vegas to London

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Finnair

Finnair's A350 offers lower cabin altitude and higher humidity for a more comfortable journey.


Finnair's Economy Comfort offers extra legroom for a small fee, enhancing long-haul comfort.

Virgin Atlantic

Virgin's Upper Class offers fully flat beds and direct aisle access for ultimate comfort.


Virgin's Economy Delight offers additional legroom and priority boarding for a more comfortable journey.

British Airways

BA's premium economy offers 18 cm extra legroom, enhancing comfort on long-haul flights.


BA's A350 G-XWBRs serve routes to Las Vegas, offering modern amenities and comfort.

Airports
LAS

LAS offers a complimentary kerbside concierge for checking luggage at Terminal 3’s departures kerb, saving time and avoiding long queues.

LHR

The Heathrow Express takes just 15 minutes to London Paddington, offering a quick and efficient route into the city.

LGW

The Gatwick Express offers a 30-minute direct service to London Victoria, ensuring a fast and comfortable journey into the city.

Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on Finnair

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Laura Ratliff

Laura Ratliff

Expert on Virgin Atlantic

Laura Ratliff

Laura Ratliff

Laura Ratliff is a New York-based writer and editor. She lives in downtown Brooklyn with her husband and their beloved dogs. Originally from Texas, she now considers New York City her home. She typically spends more than 200,000 miles on a plane each year and stays in plenty of hotels.

Read more
Duncan Madden

Duncan Madden

Expert on British Airways

Duncan Madden

Duncan Madden

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Read more
Kirstie Pickering

Kirstie Pickering

Expert on LHR and LGW

Kirstie Pickering

Kirstie Pickering

Aviation and business journalist Kirstie didn’t leave England until she was 18 years old, but has since travelled to over 20 countries including Japan, Canada, and Iceland. Her travel expertise lies in European city breaks, including how to find the best locally-owned hotels and restaurants and how to optimise the airport experience for your needs.

Read more
Harriet Baskas

Harriet Baskas

Expert on LAS

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, The Points Guy, and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more

Good to know - Cheap tickets from Las Vegas to London

Low seasonJanuary
Cheapest flight£280
Best time to beat the crowds (27% less expensive on average)
Most popular time to fly and prices are also 9% lower on average.
Flight from Las Vegas to London Heathrow Airport

When to book flights from Las Vegas to London

Are your dates flexible? Find out the best times to travel from Las Vegas to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Las Vegas to London

  • Can I fly non-stop from Las Vegas to London airports?

    Direct flights from Las Vegas to London Heathrow are available. Passengers can fly directly to London Heathrow with airlines such as British Airways, Finnair, and American Airlines. However, when you fly to other London airports, your journey will usually involve at least one stopover.

  • Is transport available from London airports?

    All five of London’s major airports are well connected to the city centre by rail. You can take the train to the city centre from Heathrow Airport Terminal 2 and Terminal 3. This journey takes around 15min and costs vary depending on which rail company you travel with. There is also a train station at Gatwick Airport, located beside the airport’s South Terminal. Passengers who arrive at Gatwick’s North Terminal can take a free shuttle service to reach the train station. The train from Gatwick takes around 30min to reach the centre of London and fares usually cost upwards of £8.

  • Are currency exchange services available at London airports?

    Currency exchange offices are in operation at London Heathrow, London Stansted, Luton Airport, and London City. Luton Airport operates a 24-hour currency exchange service. Travellers flying to London Gatwick have the option to buy currency at the arrivals hall of both North and South terminals or pre-order money in the currency of their choice to be picked up once they have landed. London Gatwick also operates a cash delivery service, where exchanged currency can be delivered to your accommodation.

  • What shops are available at London airports?

    All five of London’s major airports contain a wide range of shops and retail outlets for passengers to enjoy. As well as duty-free goods, such as cosmetics, alcohol, and confectionery, visitors at London airports can choose from a wide range of clothing stores, bookshops, and souvenirs shops, among others.

  • Which London Airport should I fly into?

    Flights from Las Vegas to London frequently arrive at three of London's major airports. London City, (LCY), London Gatwick (LGW) and London Heathrow (LHR). Heathrow is London's busiest airport and the majority of flights arrive here. London City Airport is much smaller, but it's also closer to Central London. Gatwick often has the cheapest flights available.

  • Where can I hire a car at London's airports?

    You'll likely arrive in Terminal 3 at Heathrow Airport, and you can find the car hire desks in the Arrivals area, adjacent to the Emirates Chauffeur Drive Lounge. At Gatwick, you can find the car hire desks on Level 00 of the North Terminal, close to the Domestic Arrivals area. London City's car hire centre is located just outside the terminal on Hartmann Road.

  • Can I receive special assistance at Las Vegas and London's Airports?

    You can book special assistance through your airline and receive special assistance at both airports during your trip. Airlines recommend that you book at least 48 hours before your flight is scheduled to depart. They can provide attendants, mobility equipment and other services.

  • Where do flights from Las Vegas to London stop?

    Flights operated by Iberia often stop at Chicago O'Hare International Airport (ORD) or Dallas/Fort Worth Airport (DFW). Flights operated by Air Canada often stop at Toronto Pearson International Airport (YYZ). British Airways flights stop at Chicago International Airport or Phoenix Sky Harbour International Airport (PHX).

  • What is the cheapest flight from Las Vegas to London?

    In the last 3 days, the lowest price for a flight from Las Vegas to London was £281 for a one-way ticket and £454 for a return.

  • Which airlines offer Wi-Fi service onboard planes from Las Vegas to London?

    KLM, Finnair, and American Airlines offer inflight Wi-Fi service on the Las Vegas to London flight route.

  • Which aircraft models fly most regularly from Las Vegas to London?

    The Airbus A350-1000 is the aircraft model that flies most regularly on the Las Vegas to London flight route.

  • Which airline alliances offer flights from Las Vegas to London?

    SkyTeam is the only airline alliance operating flights between Las Vegas and London.

  • On which days can I fly direct from Las Vegas to London?

    There are direct flights from Las Vegas to London on a daily basis.

  • Which is the best airline for flights from Las Vegas to London, Delta or Virgin Atlantic?

    The two airlines most popular with KAYAK users for flights from Las Vegas to London are Delta and Virgin Atlantic. With an average price for the route of £597 and an overall rating of 7.9, Delta is the most popular choice. Virgin Atlantic is also a great choice for the route, with an average price of £636 and an overall rating of 7.5.

  • How does KAYAK find such low prices on flights from Las Vegas to London?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Las Vegas to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Las Vegas to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Las Vegas is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Las Vegas to London?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London with an airline and back to Las Vegas with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Las Vegas to London?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Las Vegas up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Las Vegas to London

  • Looking for a cheap flight from Las Vegas to London? 25% of our users found flights on this route for £310 or less one-way and £497 or less round-trip.
  • At Las Vegas McCarran International Airport (LAS), Terminal 1, Terminal 3, and Domestic Terminal 3 are not connected by walkways. This means that you should check which terminal you will be departing from before you head to the airport.
  • Both International Terminals 1 and 3 feature The Club lounges that are accessible to all passengers. These lounges contain bars and food services and are also equipped with computer workstations and printers. Entry price is around $45 (£32).
  • Secure short and long-stay parking is available at both Las Vegas Airport international terminals. Passengers parked in the Terminal 1 car park can use the free shuttle service to travel to the terminal building.
  • All of London’s major airports feature on-site accommodation. Passengers arriving in London can choose from a wide range of on-site hotels all within easy walking distance of the airport terminals. Options include the Sofitel Heathrow situated inside Heathrow's Terminal 5 or the Bloc Hotel at Gatwick.
  • Las Vegas’s McCarran Airport is an international tourist hub and passengers may face long queues at check-in and security points. It is, therefore, advised that passengers arrive at the airport at least 3h before their flight is due to depart. Automated passport control kiosks are available, however, which can make checking-in faster.
  • McCarran International is equipped with a number of nursing suites on both sides of security check-in where women can breastfeed in private. These suites can be locked from the inside and contain charging ports and plugs.
  • Parents will be happy to learn there's a Kid's Play Area at Las Vegas Harry Reid International Airport (LAS). It's located in Terminal 1 on Level 2 in the D Gates area. It has a large tunnel and a climbing feature.
  • There's a bus and a tram from Las Vegas to the Airport. The Route 108 and Route 109 buses travel to Terminal 1. The Centennial Express bus stops at Terminal 1 and Terminal 3. The Green tram line travels to Terminal 1 and the Red tram line travels to Terminal 3.

Prefer to fly direct from Las Vegas to London?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Las Vegas Harry Reid Intl to London.
Find which airlines fly direct from Las Vegas Harry Reid Intl Airport to London, which days they fly and book direct flights.

Direct departures

Las Vegas Harry Reid Intl to London

Monday

American Airlines, British Airways, Virgin Atlantic

American Airlines, British Airways, +1 more

Tuesday

American Airlines, British Airways, Virgin Atlantic

American Airlines, British Airways, +1 more

Wednesday

American Airlines, British Airways, Virgin Atlantic

American Airlines, British Airways, +1 more

Thursday

American Airlines, British Airways, Virgin Atlantic

American Airlines, British Airways, +1 more

Friday

American Airlines, British Airways, Delta, +1 more

American Airlines, British Airways, +2 more

Saturday

American Airlines, British Airways, Virgin Atlantic

American Airlines, British Airways, +1 more

Sunday

American Airlines, British Airways, Virgin Atlantic

American Airlines, British Airways, +1 more

See more direct flights

Direct returns

London to Las Vegas Harry Reid Intl

Monday

American Airlines, British Airways, Delta, +1 more

American Airlines, British Airways, +2 more

Tuesday

American Airlines, British Airways, Virgin Atlantic

American Airlines, British Airways, +1 more

Wednesday

American Airlines, British Airways, Virgin Atlantic

American Airlines, British Airways, +1 more

Thursday

American Airlines, British Airways, Virgin Atlantic

American Airlines, British Airways, +1 more

Friday

American Airlines, British Airways, Virgin Atlantic

American Airlines, British Airways, +1 more

Saturday

American Airlines, British Airways, Virgin Atlantic

American Airlines, British Airways, +1 more

Sunday

American Airlines, British Airways, Virgin Atlantic

American Airlines, British Airways, +1 more

See more direct flights

Reviews of the top 3 airlines flying from Las Vegas to London

 
See real verified KAYAK customer reviews for airlines flying from Las Vegas to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Las Vegas to London? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8014 reviews
7.9Entertainment
8.5Crew
7.3Food
8.1Boarding
7.9Comfort
Airline reviews

Flight delays both to Detroits and return flight . The flight to Detroit was associated with mechanical difficulty

2.0 MediocreGina, Dec 2025
DTW - ELM
Read more Delta reviews

Flight delays both to Detroits and return flight . The flight to Detroit was associated with mechanical difficulty

I am extremely disappointed that delta internal pilot manuals now refer to the Gulf of Mexico as the “gulf of America”. You can bow down to the Orange turd on your own. I will never fly delta again

Wasn't a Delta issue I don't think, but seems there was a Delta flight at each of the 2 Dallas airports at the same exact time, both to Atlanta. I was evidently booked on the one at Love Airport, but the Carey transport shuttle took me to DFW instead and I ended up missing the flight by just a few minutes. Was able to book a Southwest flight from Love Airport, but was a big loss of time and an inconvenience.

Great. I had to modify a flight. That was easy and free. Thank You

I noticed that the planes seem to be outdated. There was no entertainment per se. Also, the waiting area did not have any working electrical outlets

None of the airplane features were available during the flight.

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

Food has been disappointing in both legs of flight to india

Great staff great experience, made a 2 hour delay very bearable

Great staff, great experience, made a 2 hour delay very bearable

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

I was my pleasure to fly virgin on my birthday for my first solo trip ever 🫶🏼

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

Overall, flight was excellent but check in was very slow for Premium Economy. Economy queue was shorter but we weren't allowed to use it.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

Great crew - old style upper class seats on the older fleet now feels dated

Premium economy more comfortable than economy, but not by much. Did was awful, do not try the omelette. Flight crew were helpful. Flight was delayed by over an hour. Overall but bad, arrived safely and thank God.

I travelled in business class and was disappointed by lack of service, curt and borderline rude time of the crew and to top it off, all of my luggage was delayed. It was like pulling teeth to even report the missing luggage and recover it the next day from the airport.

Boarding was poor. All groups called immediately one after the other resulting in a long queue in the jetty/jet bridge. Seats were very hard and and did not recline on a 4.5 hour flight. No food was available. Plane was cold. There was no entertainment.

The cramped seats are cruel and unusual punishment and may violate the Geneva code.

Check in was was and the agent was very friendly and helpful The lounge was nice...boarding was straight from the lounge Everything worked at our seats, and video entertainment was good ..food was mediocre

The flight was excellent in World Travellor plus. Well worth the extra money. Boarding at Phoenix was the usual poorly organized event. Very stressful.

Although business class, the seating was really cramped. The food was so so.

Smooth trip no turbulence which is always a bonus for me lol! In cattle class so an element of being a bit squished (but not as bad as other shorter haul airlines) smaller plane than the one we flew out on and entertainment system wasn’t as modern but still definitely passed the time. Lovely crew x

Flying on the Boeing 787 from Seattle to London was everything that I expected. Every thing was great.

Seat pitch is not enough to eat comfortably. When seat in front is reclined, your screen comes closer to your face. Ryanair seats are actually more comfortable.

The leg from Portland to Heathrow was great for a business class ticket. The BA leg from Heathrow to Lisbon was terrible. Basically coach seating with an empty seat between you and next passenger. Absolutely no leg room. Should not have been charged for business class and it was a 3 hour flight.

Everything you need to know for your flight from Las Vegas to London

Information on your arrival and departure airports