STL - LON

£217 Find Cheap Flights from St. Louis 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 St. Louis to London departing on 28/3. 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 St. Louis 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 St. Louis to London, as well as popular online travel agencies
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41.299.237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest return fare
£519
Multiple Airlines
Wed 1/4Wed 8/4
STL - LGW • 1 stop
Cheapest direct flights
£575
Finnair
Wed 2/9Wed 9/9
STL - LHR • Direct
Direct flights
4 days a week
Tue, Wed, Fri, Sun
You can fly direct with British Airways. Average duration is 0
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top airlines
Air Canada
Cheapest • from £542 (return)
British Airways
Best reviews • 6.7 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top stopover airports
Frankfurt am Main (FRA)
Cheapest • Avg £550 (return)
Chicago (ORD)
Shortest trip • 10h 32m (one-way)
Insights
Insights
Insights
Insights
Top routes
STL
-
LHR
Cheapest
STL
-
LHR
Most popular
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 21% price drop
May
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
Flight Deals

Cheap Flights from St. Louis to London (STL-LON)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from St. Louis 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 St. Louis to London

Wed, 1 Apr - Wed, 8 Apr
Multiple Airlines Logo
16:54 - 10:00
STL
-
LGW
35h 06m
1 stop
Multiple Airlines Logo
14:00 - 23:25
LGW
-
STL
15h 25m
1 stop
£519Multiple Airlines
Wed, 1 Apr - Wed, 8 Apr
Multiple Airlines Logo
16:54 - 10:00
STL
-
LGW
35h 06m
1 stop
Multiple Airlines Logo
14:00 - 17:34
LGW
-
STL
33h 34m
2 stops
£525Multiple Airlines
Sun, 3 May - Tue, 12 May
Air Canada Logo
13:00 - 10:00
STL
-
LHR
15h 00m
1 stop
Air Canada Logo
06:50 - 20:25
LHR
-
STL
19h 35m
2 stops
£542Air Canada
Wed, 15 Apr - Wed, 22 Apr
Finnair Logo
12:27 - 07:55
STL
-
LHR
13h 28m
1 stop
Finnair Logo
16:25 - 19:30
LHR
-
STL
9h 05mdirect
£555Finnair
Wed, 29 Apr - Wed, 6 May
Air Canada Logo
16:05 - 11:50
STL
-
LHR
13h 45m
1 stop
Air Canada Logo
08:40 - 20:25
LHR
-
STL
17h 45m
2 stops
£556Air Canada
Mon, 17 Aug - Tue, 25 Aug
Lufthansa Logo
18:55 - 18:25
STL
-
LHR
17h 30m
2 stops
Lufthansa Logo
06:30 - 13:25
LHR
-
STL
12h 55m
1 stop
£557Lufthansa
Tue, 5 May - Tue, 19 May
Lufthansa Logo
19:09 - 18:25
STL
-
LHR
17h 16m
2 stops
Lufthansa Logo
09:00 - 21:13
LHR
-
STL
18h 13m
2 stops
£558Lufthansa
Tue, 14 Apr - Tue, 21 Apr
Finnair Logo
12:27 - 08:05
STL
-
LHR
13h 38m
1 stop
Finnair Logo
16:25 - 19:30
LHR
-
STL
9h 05mdirect
£559Finnair
Wed, 22 Apr - Fri, 1 May
Delta Logo
13:46 - 08:50
STL
-
LCY
37h 04m
2 stops
Delta Logo
10:00 - 23:13
LCY
-
STL
19h 13m
2 stops
£608Delta
Wed, 22 Apr - Thu, 30 Apr
Delta Logo
10:50 - 08:50
STL
-
LCY
40h 00m
2 stops
Delta Logo
10:00 - 23:13
LCY
-
STL
43h 13m
2 stops
£608Delta
Booking Insights

KAYAK’s insights & trends for St. Louis to London flights

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

How much is a return flight from St. Louis to London?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to London departing in April.

What is the cheapest St. Louis to London flight route?

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

The cheapest return flight from St. Louis to London costs £928 on the route between St. Louis (STL) and London Heathrow Airport (LHR). It is also the most popular route.

What’s the cheapest day of the week to fly from St. Louis to London?

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

For St. Louis to London, Friday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from London back to St. Louis, the best deals are generally found on Saturday, with Tuesday being the most expensive.

What is the cheapest month to fly from St. Louis to London?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis 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 St. Louis to London is January, where tickets cost £506 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £998 and £855 respectively.

Can I save money by flying with a stopover from St. Louis 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.

No, with an average price for the route of £608, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from St. Louis 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 St. Louis 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 St. Louis to London, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

Find deals

Good to know - Cheap tickets from St. Louis to London

Low seasonJanuary
Cheapest flight£217
Best time to beat the crowds (22% less expensive on average)
Most popular time to fly (16% more expensive on average)
Flight from St. Louis to London Gatwick Airport

When to book flights from St. Louis to London

Are your dates flexible? Find out the best times to travel from St. Louis 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 St. Louis to London

  • Are there airport hotels at Lambert St Louis?

    There are many hotels to choose from near Lambert St Louis. Choose a luxury stay at the Hilton Hotel, offering a pool, dining and airport shuttle service. The closest hotel to the airport is Drury Inn and Suites, only a 2min drive away.

  • What special assistance is available at Lambert St Louis?

    Wheelchair access is available at each entrance, and inside the terminal, you will find accessible restrooms, low-level ATMs for wheelchair users and elevators. There is an area for service animals, and Braille text is used on signage throughout. If you require assistance boarding the plane, we recommend contacting your airline at least 48h prior to departure to book a skycap.

  • Which London airport is closest to Central London?

    London City and London Heathrow are the most centrally-located London airports. You can get from Heathrow to the city centre on the Heathrow Express in around 20min with services running roughly every 15min. If you're travelling from London City Airport, you can take the Docklands Light Railway (DLR) from the airport station to Canning Town, where you can change to a London Underground or bus service to your final destination. The journey time should take on average around 40min - 1h.

  • What facilities are offered at St Louis Airport?

    Services available at St Louis Airport range from banking and currency exchange to luggage trolley rental. You can access Wi-Fi for free for 60min, with a small fee applicable for longer use. For anyone wishing to partake in prayer or other religious obligations, St Louis Interfaith Chapel is located on site. Shoe-shining facilities are available in each terminal, and help location points allow tourists to seek advice or assistance when navigating the airport. You can choose from several restaurants to eat at and newsagents and gift shops to browse whilst you wait for boarding to start.

  • What is the cheapest flight from St. Louis to London?

    In the last 3 days, the lowest price for a flight from St. Louis to London was £217 for a one-way ticket and £519 for a return.

  • Which airports will I be using when flying from St. Louis to London?

    St. Louis is served by only 1 airport and there are 3 airports in London. You will leave St. Louis from Lambert-St Louis and you will be arriving in London at one of these airports: London Gatwick, London Heathrow, or London Stansted.

  • Which airlines offer Wi-Fi service onboard planes from St. Louis to London?

    American Airlines, Lufthansa, and United Airlines offer inflight Wi-Fi service on the St. Louis to London flight route.

  • Which aircraft models fly most regularly from St. Louis to London?

    The Boeing 787-8 Dreamliner is the aircraft model that flies most regularly on the St. Louis to London flight route.

  • Which airline alliances offer flights from St. Louis to London?

    oneworld, and SkyTeam are the airline alliances operating flights between St. Louis and London, with oneworld being the most commonly used for this route.

  • On which days can I fly direct from St. Louis to London?

    You can catch a direct flight from St. Louis to London on on Tuesday, Wednesday, Friday, and Sunday.

  • How does KAYAK find such low prices on flights from St. Louis 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 St. Louis to London.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from St. Louis 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 St. Louis 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 St. Louis with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis 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 St. Louis 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 St. Louis to London

  • There are many transportation options to travel to St Lambert Louis Airport (STL) from St Louis. The Metrolink is an affordable choice taking around 30min to arrive at the airport. Alternatively, the bus journey is about 55min inclusive of one change, and driving by car or taxi takes about 18min.
  • If you're travelling on business, St Louis has a choice of lounges from which you can work. Wingtips Lounge is located in Terminal 2 and offers great accessibility with entry via membership and single visit passes. Enjoy a seasonal-inspired menu whilst you utilise the fast Wi-Fi and benefit from air conditioning. The lounge is available to use for a maximum of 4h.
  • Lambert St Louis has seven car parks, each within walking distance of the airport, with a free shuttle service available. Long-term parking is also available, although we recommend booking in advance to save time before your flight. Short-term parking is perfect if you're being dropped off at the airport, with both hourly and daily rates available.
  • Lambert St Louis has two terminals. Terminal 1 has four concourses from A to D, serving domestic flights. Flights from Lambert St Louis to London will depart from Terminal 2, which caters for all international flights and is located on the southern end of the complex. You can fly to one of three London airports: Heathrow (LHR), Gatwick (LGW) and London City (LCY).
  • If you're travelling with the family, make the most of Lambert St Louis' Play Port – a transport-themed play exhibit. The exhibit offers both fun and education with features such as a child-size plane and air control tower. Baby-changing facilities are available throughout the airport, along with lactation suites for breastfeeding mothers.

Prefer to fly direct from St. Louis to London?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Lambert-St Louis to London.
Find which airlines fly direct from Lambert-St Louis Airport to London, which days they fly and book direct flights.

Direct departures

Lambert-St Louis to London

Tuesday

British Airways

British Airways

Wednesday

British Airways

British Airways

Friday

British Airways

British Airways

Sunday

British Airways

British Airways

See more direct flights

Direct returns

London to Lambert-St Louis

Tuesday

British Airways

British Airways

Wednesday

British Airways

British Airways

Friday

British Airways

British Airways

Sunday

British Airways

British Airways

See more direct flights

Reviews of the top airline flying from St. Louis to London

 
See real verified KAYAK customer reviews for airlines flying from St. Louis 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 St. Louis 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.
6.7
British AirwaysOverall score based on 7797 reviews
6.9Boarding
6.4Food
6.8Comfort
7.6Crew
6.4Entertainment
Airline reviews

Very please with the seating that the Kayak staff booked for us!

10.0 ExcellentAimee, Mar 2026
ATL - LHR
Read more British Airways reviews

Very please with the seating that the Kayak staff booked for us!

Worth every penny to upgrade to BC. Treated and felt more like First Class

Good service, food and comfort in World Traveller Plus. Entertainment was poor - no wifi on the way out and barely working on the way back. Not a great choice of entertainment on the seat back tv.

They had us seating down for one hour just waiting on the plane

Flying with BA is always a good experience—even in economy class. It is better if in business and first class. Timely, breeze through security and timely connections

We waited at BOS at the gate for an hour and couldn’t get a drink or anything. Once in the air the service, food and ride was excellent.

My enetertainmnet screen was broken. Lost my bags. Almost missed my flight do to connection issues with (despite a request) ZERO help from crew. Food was edible. Potatoes pretty good even

The issue was not with BA it was with the link yoiu sent fopr booking the flight

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

The airline was not clear about a new departure time so we got to the airport early anyway. The flight left early which was great because of weather. The check in process was very easy and staff were friendly and helpful. The crew was great and our flight was very good.

Everything you need to know for your flight from St. Louis to London

Information on your arrival and departure airports

St. Louis (STL)