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£340 Find cheap flights from St. Louis to London Heathrow Airport

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 22/7. 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
0 bags
Sat 15/6
Sat 22/6

Search hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
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
In the last 7 days, travellers have searched 42,211,976 times on KAYAK, and here's why:

Save 28% or moreCompare multiple travel sites with one search.

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

 
These are the cheapest deals for flights from St. Louis to Heathrow currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent return flight deals from St. Louis to Heathrow

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from St. Louis to Heathrow.

Recent one-way flight deals from St. Louis to Heathrow

Only flying one-way? Below are some of the best one-way flight deals from St. Louis to Heathrow found on KAYAK recently.

Recent last-minute flight deals from St. Louis to Heathrow

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from St. Louis to Heathrow.

Recent direct flight deals from St. Louis to Heathrow

The latest deals for direct flights from St. Louis to Heathrow so you can sit back and relax without the need for a layover.

Cheap bus & train deals from St. Louis to Heathrow

Find recent round-trip train or bus tickets from St. Louis to Heathrow.

All round-trip flight deals to Heathrow

The cheapest plane tickets to Heathrow found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
14:05 - 17:40STL-LHR
21h 35m2 stops
06:40 - 23:35LHR-STL
22h 55m2 stops
Mon, 30 Sep - Tue, 15 Oct
10:10 - 08:55STL-LHR
16h 45m2 stops
06:40 - 23:35LHR-STL
22h 55m2 stops
Sun, 29 Sep - Tue, 15 Oct
17:20 - 05:55STL-LHR
30h 35m1 stop
15:50 - 15:20LHR-STL
29h 30m1 stop
£578United Airlines
Find Deal
Mon, 23 Sep - Thu, 3 Oct
12:00 - 10:00STL-LHR
16h 00m1 stop
09:30 - 21:05LHR-STL
17h 35m1 stop
£579Air Canada
Find Deal
Mon, 23 Sep - Thu, 3 Oct
12:55 - 05:55STL-LHR
11h 00m1 stop
18:00 - 12:22LHR-STL
24h 22m2 stops
£581United Airlines
Find Deal
Wed, 4 Sep - Wed, 18 Sep
12:00 - 06:30STL-LHR
12h 30m1 stop
14:05 - 21:05LHR-STL
13h 00m1 stop
£582Air Canada
Find Deal
Sun, 15 Sep - Thu, 26 Sep
14:14 - 07:50STL-LHR
11h 36m1 stop
11:05 - 17:47LHR-STL
12h 42m1 stop
£592British Airways
Find Deal
Sat, 10 Aug - Sat, 31 Aug
12:53 - 12:35STL-LHR
17h 42m2 stops
15:55 - 23:43LHR-STL
13h 48m1 stop
£600Virgin Atlantic
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Wed, 5 Jun - Tue, 11 Jun
06:00 - 22:10STL-LHR
10h 10m1 stop
08:40 - 17:17LHR-STL
14h 37m1 stop
£613British Airways
Find Deal
Tue, 13 Aug - Mon, 19 Aug
17:25 - 14:00STL-LHR
14h 35m2 stops
19:45 - 17:01LHR-STL
27h 16m2 stops
£642Virgin Atlantic
Find Deal
Thu, 13 Jun - Mon, 17 Jun
16:45 - 20:20STL-LHR
21h 35m3 stops
Mon, 22 Jul
20:12 - 21:35STL-LHR
43h 23m3 stops
Thu, 13 Jun
12:00 - 06:30STL-LHR
12h 30m1 stop
£429Air Canada
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Wed, 11 Sep
11:25 - 05:55STL-LHR
12h 30m1 stop
£432United Airlines
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Wed, 10 Jul
17:30 - 05:55STL-LHR
30h 25m1 stop
£442United Airlines
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Sat, 27 Jul
15:27 - 10:50STL-LHR
13h 23m2 stops
£460American Airlines
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Wed, 12 Jun
15:25 - 10:40STL-LHR
13h 15m1 stop
£472Lufthansa
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Fri, 20 Sep
09:50 - 06:35STL-LHR
14h 45m1 stop
£517Air Canada
Find Deal
Thu, 13 Jun
10:50 - 10:10STL-LHR
17h 20m1 stop
£681Lufthansa
Find Deal
Thu, 13 Jun
11:08 - 07:40STL-LHR
14h 32m2 stops
£912American Airlines
Find Deal
Thu, 19 Sep
11:00 - 06:30STL-LHR
13h 30m1 stop
09:30 - 21:05LHR-STL
17h 35m1 stop
£585Air Canada
Find Deal
Tue, 21 May - Thu, 30 May
11:00 - 05:55STL-LHR
12h 55m1 stop
09:30 - 21:05LHR-STL
17h 35m1 stop
Sun, 19 May - Fri, 7 Jun
16:05 - 08:35STL-LHR
10h 30m1 stop
09:30 - 21:05LHR-STL
17h 35m1 stop
£589Air Canada
Find Deal
Tue, 21 May - Thu, 30 May
06:11 - 07:15STL-LHR
19h 04m1 stop
06:15 - 17:22LHR-STL
17h 07m2 stops
£590Delta
Find Deal
Tue, 21 May - Tue, 28 May
18:12 - 12:15STL-LHR
12h 03m2 stops
06:15 - 17:22LHR-STL
17h 07m2 stops
£593Delta
Find Deal
Tue, 21 May - Tue, 28 May
05:55 - 22:10STL-LHR
10h 15m1 stop
19:35 - 20:55LHR-STL
31h 20m2 stops
£609British Airways
Find Deal
Tue, 21 May - Mon, 27 May
15:15 - 05:55STL-LHR
32h 40m1 stop
14:05 - 10:08LHR-STL
26h 03m2 stops
£622United Airlines
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Fri, 17 May - Wed, 29 May
12:00 - 06:45STL-LHR
12h 45m1 stop
11:30 - 21:52LHR-STL
16h 22m2 stops
£630Virgin Atlantic
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Fri, 17 May - Fri, 24 May
11:00 - 06:30STL-LHR
13h 30m1 stop
06:50 - 15:40LHR-STL
14h 50m2 stops
£701United Airlines
Find Deal
Mon, 20 May - Fri, 16 Aug
05:55 - 22:10STL-LHR
10h 15m1 stop
19:35 - 20:55LHR-STL
31h 20m2 stops
£993British Airways
Find Deal
Sat, 18 May - Mon, 20 May

Flights from St. Louis to Heathrow - Travel Insights & Trends

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.

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

The average price of all flights from St. Louis to London Heathrow Airport clicked on KAYAK for each day over the last 12 months.
For St. Louis to London Heathrow Airport, Sunday is the cheapest day to fly on average and Friday is the most expensive. Flying from London Heathrow Airport back to St. Louis, the best deals are generally found on Wednesday, with Sunday being the most expensive.

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 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 February, where tickets cost £564 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is £1,228 and £878 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for 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 month.
To get a below average price on the flight from St. Louis to London Heathrow Airport, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 64 days before departure.

Which airlines provide the cheapest flights from St. Louis to London Heathrow Airport?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The cheapest return flight ticket from St. Louis to London Heathrow Airport found by KAYAK users in the last 72 hours was for £578 on United Airlines, followed by Air Canada (£579). One-way flight deals have also been found from as low as £429 on Air Canada and from £432 on United Airlines.

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

Low season

January

High season

July

Cheapest flight

£340
Best time to beat the crowds (18% less expensive on average)
Most popular time to fly (23% 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

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

    In the last 3 days, the lowest price for a flight from St. Louis to London Heathrow Airport was £431 for a one-way ticket and £642 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 aircraft models fly most regularly from St. Louis to London Heathrow Airport?

    We unfortunately don’t have that data for this specific route.

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

    Star Alliance, 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.

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

    The two airlines most popular with KAYAK users for flights from St. Louis to London are Virgin Atlantic and United Airlines. With an average price for the route of £597 and an overall rating of 7.7, Virgin Atlantic is the most popular choice. United Airlines is also a great choice for the route, with an average price of £571 and an overall rating of 7.4.

  • 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.

See more FAQs

Top 3 airlines serving 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.
7.7
Virgin AtlanticOverall score based on 735 reviews
7.7Entertainment
8.3Crew
7.1Food
7.8Boarding
7.4Comfort
Airline reviews

Cabin crew on our flight showed lack of any customer service gruff and acting annoyed if you asked anything and I mean anything Example a man on the seat over dropped his beer on my husbands blanket We asked if we could switch out blankets cabin crew Said. No we don’t have any extras OK well can you take the wet one Cabin crew looked disgusted and annoyed Took it no OK or yes just a growl

6.0 GoodSonia, Apr 2024LAX - LHR
Read more about Virgin Atlantic reviews

Cabin crew on our flight showed lack of any customer service gruff and acting annoyed if you asked anything and I mean anything Example a man on the seat over dropped his beer on my husbands blanket We asked if we could switch out blankets cabin crew Said. No we don’t have any extras OK well can you take the wet one Cabin crew looked disgusted and annoyed Took it no OK or yes just a growl

Quick flight. But cabin crew were very noisy and talking too much, especially when we were seated at the back of the plane trying to sleep through the night .

My ticket was for Premium Economy and all the seats were taken, I was placed in Economy class and I’m looking for a refund.

The delay was an issue. Other than that. Every thing good

Staff didn’t check cabin well for landing seemed more interested in chatting to each other. Food was poor and differed from pre order.

We were in the last group to be called to the flight - which was 30 minutes late taking off. While we were lucky enough to have been given bulkhead seats (due to a medical condition I’d told them about beforehand) the seats weren’t particularly comfortable. A crying baby for the whole trip made things worse, so the crew managed very well with coping. The final thing I’d say was that there wasn’t enough food served during the flight.

Very good. Glad we had Premium for the flight out.

We flew Upper Class from London to The Turks and Caicos. Check in was amazing. Our ldriver too us directly to a special entrance to terminal 3. It took 10 minutes to check in and clear customs. Amazing! The VA lounge is large and comfortable. Boarding the flight was easy and without a wait. The crew was excellent. But the seats were awful, strange and uncomfortable. Having a comfortable flat bed seat is the reason we pays 1000s extra. The VA 787 uses a reverse herringbone configuration. Look it up. You have your back to the window and are facing the aisle with no privacy. Turning the seat into a bed requires assistance from the crew so not very spontaneous. . The food was ok. A bit tasteless and meager portions. Had to pay for WiFi. I believe VA has other configuration on their dream airbus flights. Lots of stuff about all this on YouTube where you can see what I have been describing. I can not recommend taking VA on a long flight with these seats.

From the start everything was perfectly fine. First meal was fantastic. Breakfast needs a lot of work and food was overcooked and not very nice for breakfast. Staff were fantastic friendly nice they came round and check we need anything else to eat or drink

From the start everything was perfectly fine. First meal was fantastic. Breakfast needs a lot of work and food was overcooked and not very nice for breakfast. Staff for a fantastic friendly nice we came round and check we need anything else to eat or drink

Standard flight experience, but there is only power at the seat to row 20 on the aircraft, on my initial check in it did not say that was the case

Not a fan of the diagonal partially enclosed business class seats or how they have to be converted to beds manually by crew. I prefer more isolation and user control for switching to lie flat.

No lounge access with “United First” ticket. False alarm about late flight, jeopardizing connection. Wrong meal. Loose power socket would not hold plug, could not charge device. In-flight access to text messaging did not work. Toilet seat on plane would not stay up.

We ended up with seats in the very back. So they did not recline. Have no idea why, we reserved and checked in very early. The isles were very narrow and the seats had very little leg room. But they did give us water, and a snack.

Energetic crew - flight full of swiftied going to Taylor's opening show in Paris! Long lines for bathroom made out kind of suck though

Check in etc was very good. As for on the plane, it was like flying in a freezer. It was so cold, i have flown for years and never been so cold on a plane. Staff on board said its always cold when flying which is a load of rubbish. They wouldnt put any heating on and now i have the flu because of this .

I’ve had a couple flights this week on United that were delayed by an hour or more

Flight was delayed 2.5 hours - a big deal on an overnight when you plan to sleep.

I feel like they have upgraded the app since I last flew United and I found it to be super helpful. I had stopped flying United unless absolutely necessary and my experience on this trip indicates they have been working hard to improve their services.

Surprisingly easy! I was hesitant to try this, but the cost swayed me. I actually felt like I had less stress than all the taxiing and possible delays that occur with short regional flights where you spend less time in the air than getting to and from the plane..

- OK plane. Basic accommodations. OK food. The digital window shade wasn't working.

- OK plane. Basic accommodations. OK food. The digital window shade wasn't working. - Expect to be woken up more than an hour before landing when they start dinging the bell and making announcements and turning on all cabin lights to serve a snack. I would prefer they remain quiet and only serve people who want to wake up.

Better food and more space in the seats. Also when doing the web check in both times I was going in to your site the minute you open it and there is not really many seats to choose only to buy!!!

It was ok, not as good as it used to be. The Heathrow connection was a disaster - complete anarchy, unknowledgable and skimpy assistance and signage. Gate crew at next flight was great, held the flight while my wife struggled through security.

It was great! The seats were comfortable, and they fed me during the transatlantic flight, something which I have been missing out on for the past 3 years as I travel to and from school.

This flight was cancelled at the last minute. We were rebooked on another flight but a day later. We lost a day of our vacation and paid for a night in a hotel we couldn’t use. The flights we were rebooked on (both American) messed up our seating on both flights-we didn’t get the seats we had paid for. All in all, a terrible experience.

Lost our bags in Heathrow, We didn’t receive bags in Mallorca for 3 days, out of a 7 day cycling vacation. Really inconvenient and disappointing!

We missed the flight to Barcelona because the flight from Baltimore was delayed. We flew on Vueling VW6653. Our luggage didn’t arrive. Please help us get our luggage. We are staying at Hotel Gran Via in Barcelona

In economy and food was ok, but with limited leg space (and I was in a 2 seat configuration) it was difficult to eat with a tiny seat tray. I spilt wine on my trousers. First time on British Air (I usually fly Turkish Air) and in a 777. Heathrow was pleasant but changing terminals awkward.

Starting with the flight Cairo to London the plain was so poor no entertainment at all uncomfortable seats although it’s 5 hours long,then an American airline plain took me from London to Miami it was a bad experience the crew most of flight time not available and they asked us to help our selves for any snacks if we need. From Miami to London actually was perfect flight with a huge plain and perfect crew but from London to Cairo was horrible plain with stiff fixed seats not movable no entertainment or wi fi very poor Menu which is unacceptable for a business class

Book cheap flights from St. Louis to London

Cheapest flights to London from St. Louis found in 2024

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to London found on KAYAK in the last 72 hours.
22/7Mon
3 stops
21h 35mSTL-LHR
£340
13/6Thu
3 stops
43h 23mSTL-LHR
£407
11/9Wed
1 stopAir Canada
12h 30mSTL-LHR
£429
10/7Wed
1 stopUnited Airlines
12h 30mSTL-LHR
£432
27/7Sat
1 stopUnited Airlines
30h 25mSTL-LHR
£442
12/6Wed
2 stopsAmerican Airlines
13h 23mSTL-LHR
£460
20/9Fri
1 stopLufthansa
13h 15mSTL-LHR
£472
13/6Thu
1 stopAir Canada
14h 45mSTL-LHR
£517
13/6Thu
1 stopLufthansa
17h 20mSTL-LHR
£681
19/9Thu
2 stopsAmerican Airlines
14h 32mSTL-LHR
£912

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Last minute flights from St. Louis to Heathrow

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from St. Louis to London that are departing in the next 10 days.
21/5Tue
multi-stopAir Canada
13h 30mSTL-LHR
30/5Thu
multi-stopAir Canada
17h 35mLHR-STL
£585
19/5Sun
multi-stop
12h 55mSTL-LHR
7/6Fri
multi-stop
17h 35mLHR-STL
£588
21/5Tue
multi-stopAir Canada
10h 30mSTL-LHR
30/5Thu
multi-stopAir Canada
17h 35mLHR-STL
£589
21/5Tue
multi-stopDelta
19h 04mSTL-LHR
28/5Tue
multi-stopDelta
17h 07mLHR-STL
£590
21/5Tue
multi-stopDelta
12h 03mSTL-LHR
28/5Tue
multi-stopDelta
17h 07mLHR-STL
£593
21/5Tue
multi-stopBritish Airways
10h 15mSTL-LHR
27/5Mon
multi-stopBritish Airways
31h 20mLHR-STL
£609
17/5Fri
multi-stopUnited Airlines
32h 40mSTL-LHR
29/5Wed
multi-stopUnited Airlines
26h 03mLHR-STL
£622
17/5Fri
multi-stopVirgin Atlantic
12h 45mSTL-LHR
24/5Fri
multi-stopVirgin Atlantic
16h 22mLHR-STL
£630
20/5Mon
multi-stopUnited Airlines
13h 30mSTL-LHR
16/8Fri
multi-stopUnited Airlines
14h 50mLHR-STL
£701
18/5Sat
multi-stopBritish Airways
10h 15mSTL-LHR
20/5Mon
multi-stopBritish Airways
31h 20mLHR-STL
£993

Search by stops

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St. Louis - London Heathrow Airport Flights

Departure:

St. Louis (undefined)United States

Destination:

London Heathrow Airport (LHR)United Kingdom

Return flight deals:

London Heathrow Airport - St. Louis

Cabin classes: