STL - LHR

£239 Find Cheap Flights from St. Louis to London Heathrow Airport – Compare and Save

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 Heathrow departing on 14/11. 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

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Everything you should know

Cheapest return fare
£727
Typical prices: £566-£840
Air Canada, Lufthansa
Sun 23/8Sun 30/8
STL - LHR • 1 stop
Cheapest direct flights
£742
British Airways
Tue 8/9Wed 16/9
STL - LHR • Direct
Direct flights
Tue, Wed, Fri, Sun
You can fly direct with British Airways. Average duration is 8h 00m
Direct flights
Direct flights
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Direct flights
Direct flights
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Top airlines
Cheapest • from £729 (return)
Best reviews • 7.5 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Top stopover airports
Cheapest • Avg £550 (return)
Shortest trip • 10h 36m (one-way)
Insights
Insights
Insights
Insights
Avoid delays
Most punctual • 74% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
When to travel
Cheapest • 30% price drop
Most popular
Good to know
Good to know
+1
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Good to know
Good to know
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We hope you love your trip to Heathrow!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Heathrow (STL-LHR)

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

Sun, 23 Aug - Sun, 30 Aug
Multiple Airlines Logo
12:10 - 06:30
STL
-
LHR
12h 20m
1 stop
Multiple Airlines Logo
06:30 - 13:25
LHR
-
STL
12h 55m
1 stop
£727Multiple Airlines
Sat, 12 Dec - Sat, 19 Dec
Multiple Airlines Logo
16:05 - 06:30
STL
-
LHR
32h 25m
1 stop
Multiple Airlines Logo
19:30 - 13:45
LHR
-
STL
24h 15m
1 stop
£727Multiple Airlines
Thu, 7 Jan - Mon, 11 Jan
Multiple Airlines Logo
15:37 - 12:15
STL
-
LHR
14h 38m
1 stop
Multiple Airlines Logo
18:00 - 15:26
LHR
-
STL
27h 26m
1 stop
£728Multiple Airlines
Tue, 13 Oct - Sun, 18 Oct
Multiple Airlines Logo
12:10 - 06:30
STL
-
LHR
12h 20m
1 stop
Multiple Airlines Logo
06:30 - 13:25
LHR
-
STL
12h 55m
1 stop
£728Multiple Airlines
Fri, 9 Oct - Wed, 14 Oct
British Airways Logo
21:35 - 11:35
STL
-
LHR
8h 00mdirect
British Airways Logo
14:45 - 21:08
LHR
-
STL
12h 23m
1 stop
£736British Airways
Sun, 23 Aug - Sun, 6 Sep
Virgin Atlantic Logo
17:34 - 13:05
STL
-
LHR
13h 31m
1 stop
Virgin Atlantic Logo
06:30 - 16:38
LHR
-
STL
16h 08m
2 stops
£738Virgin Atlantic
Sun, 23 Aug - Wed, 2 Sep
British Airways Logo
20:07 - 12:15
STL
-
LHR
10h 08m
1 stop
British Airways Logo
16:25 - 19:30
LHR
-
STL
9h 05mdirect
£739British Airways
Sun, 23 Aug - Tue, 1 Sep
British Airways Logo
16:54 - 10:30
STL
-
LHR
11h 36m
1 stop
British Airways Logo
16:25 - 19:30
LHR
-
STL
9h 05mdirect
£739British Airways
Fri, 4 Sep - Fri, 11 Sep
Virgin Atlantic Logo
17:23 - 13:15
STL
-
LHR
13h 52m
1 stop
Virgin Atlantic Logo
09:55 - 20:35
LHR
-
STL
16h 40m
2 stops
£739Virgin Atlantic
Fri, 25 Sep - Fri, 2 Oct
Virgin Atlantic Logo
14:30 - 13:15
STL
-
LHR
16h 45m
1 stop
Virgin Atlantic Logo
06:30 - 17:10
LHR
-
STL
16h 40m
2 stops
£739Virgin Atlantic
Booking Insights

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

Get data-powered insights and trends into flights from St. Louis to Heathrow 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 Heathrow Airport?

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 Heathrow Airport departing in August.

Flight prices are typical for this route right now.

Flights to London Heathrow Airport from St. Louis usually cost between £566 and £840 in August.
The lowest price found in the past 5 days was £727 on Multiple Airlines (23 Aug–30 Aug).

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

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

If your flying dates are flexible, you should consider flying to London Heathrow Airport on a Friday, as we generally find the cheapest rates on that day for this route. On the other hand, Tuesday is the most expensive day to fly from St. Louis to London Heathrow Airport. For your return ticket, we recommend flying on a Saturday and avoiding Sundays for the best deals.

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

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 Heathrow Airport, 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 Heathrow Airport is October, where tickets cost £491 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £1,087 and £994 respectively.

Can I save money by flying with a stopover from St. Louis to London Heathrow Airport?

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 £737 on average.

How far in advance should I book a flight from St. Louis to London Heathrow Airport?

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 Heathrow Airport, 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 Heathrow Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

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

Low season

January

Cheapest flight

£239
Best time to beat the crowds (2% less expensive on average)
Most popular time to fly (12% more expensive on average)
Flight from St. Louis to London Heathrow Airport

When to book flights from St. Louis to Heathrow

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

  • How many flights are there between St. Louis and London Heathrow Airport per day?

    There is a maximum of 1 direct flight a day that takes off from St. Louis and lands in London Heathrow Airport, with an average flight time of 8h 00m. The most common departure time is 21:00 and most flights take off in the evening. Each week, there are 4 flights.

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

    In the last 5 days, the lowest price for a flight from St. Louis to London Heathrow Airport was £239 for a one-way ticket and £727 for a return.

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

    On your way to London Heathrow Airport, you’ll fly out from Lambert-St Louis. You’ll be landing at London Heathrow.

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

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

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

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

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

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

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

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

  • Which is the best airline for flights from St. Louis to London, Virgin Atlantic or British Airways?

    The two airlines most popular with KAYAK users for flights from St. Louis to London are Virgin Atlantic and British Airways. With an average price for the route of £587 and an overall rating of 7.5, Virgin Atlantic is the most popular choice. British Airways is also a great choice for the route, with an average price of £571 and an overall rating of 6.7.

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

    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 Heathrow Airport.

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

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

  • What is the Hacker Fare option on flights from St. Louis to London Heathrow Airport?

    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 Heathrow Airport 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 Heathrow Airport?

    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 Heathrow Airport from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Prefer to fly direct from St. Louis to London Heathrow Airport?

 
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 Heathrow.
Find which airlines fly direct from Lambert-St Louis Airport to London Heathrow Airport, which days they fly and book direct flights.

Direct departures

Lambert-St Louis to London Heathrow

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 Heathrow 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 airlines flying from St. Louis to Heathrow

 
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 Heathrow? 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.
7.5
Virgin AtlanticOverall score based on 694 reviews
7.7Boarding
7.5Entertainment
6.9Food
8.1Crew
7.3Comfort
Airline reviews

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

10.0 ExcellentAnonymous, Oct 2025
LAX - LHR
Read more Virgin Atlantic reviews

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

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

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.

Good overall. Cannot fault the airlines. I have had better entertainment systems before ie ice in Emirates but it was not too bad. Food was decent and staff were friendly.

Miami airport needs more thorough signage. It was a long walk from my transport point to the check in desk,

Flight took off an hour late. Had to stay on the tarmac for half an hour after landing. Both annoying.

The crew was very good. However, the equipment was a bit dated. Some of the electronics were not working. To top it, three bags didn’t arrive with me. Two of them were delivered a day later. I’m still waiting for the third bag, I was so looking forward to this virgin Atlantic flight, but, I am disappointed.

My only complaint is that the pocket in front of me was ripped and my things, like iPad and airline magazines, kept slipping to the floor.

Flight delayed yet again. Crew apathetic and unhelpful re affect on connecting flight.

I think Virgin is one of the best flying experiences, especially from/to the UK. The staff are so helpful and fun, the food is good, seats comfortable, goof entertainment and great value. Check in and boarding is pretty pain free. I also find that the other passengers are generally so kind and considerate than when I've flown other airlines.

As I remember my last BA flight - mediocre at best. Uncomfortable with poor and minimal food and drinks. Screen broke shortly into flight so didn’t have access to entertainment either.

They gave away my business class seat. No explanation and no apology. Told me I had to take the downgrade if I wanted to get to India. Then no WiFi for 10 hours. Just ridiculous. We should not work with this company at Deloitte. They don’t know how to run a business.

Work being done at DIA made it difficult to find BA desk.

The airplane was refreshingly silent in flight than Airbuses, landing was very soft and secure. Food was also warm and light , not a big fan of curry though. Staff was polite, discrete, professional and helpful.

I was booked in Premium Economy and never given a chance to choose to purchase my own seat. Ended up with a middle seat, which was very difficult for me. The airline then left my bag in London so when I arrived in Instanbul it was not there. They delivered it to me the next day but many valuable items had been stolen. I've been flying with BA for years and this was the first time I had such a bizarre and bad experience with them.

Meh. Lived the seat. The entertainment unit did not work and had to be reset 3 times. Service was SLOW taking over 90 min to be served. Crew forgot about my meal. Chicken was dry and almost inedible.

Boarding process was chaotic. Confusion over Boarding gates: gate 55 or gate 56 ???. Unnecessary standing in long lines to board. Better to call out Boarding groups one at a time and everyone else to sit. Airline only has 2 Boarding groups 1-3 and 4-9. That causes over crowding and chaos

Lady next to me was coughing profusely the entire flight, other lady moved seats because of it, 8 hours of that during an overnight flight is a bit much.

3.5 hr delay leaving Pittsburgh, notifications for which were incomplete and untimely. Connecting flight was automatically switched to one requiring more than a 30 hour layover! After waiting in a long queue, customer service reduced layover to 11 hours and also set up an earlier standby. The standby had empty seats, but the gate agent couldn't change our tickets! On top of all that my luggage was lost and has yet to even be located, much less returned 5 (FIVE!) days later. Too bad there's no rating below poor.

Canceled flight late London to Florence. Help at airport very poor. Treated poorly. Had to sleep in the airport. Lost bags- still do not have them. Horrible. I should be reimbursed!

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

Information on your arrival and departure airports