$474+ Cheap flights from Heathrow (LHR) to St. Louis (STL)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — STL
Jul 11 — Jul 181
Round-trip
1 adult, Economy
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Find cheap flights from Heathrow to St. Louis with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Heathrow to St. Louis
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Best
Last-minute
One-way
Cheapest flights from Heathrow to St. LouisExplore the most affordable flight options available from Heathrow to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 11, 2026.
Explore the most affordable flight options available from Heathrow to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 11, 2026.
This Delta deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/76:30 am
LHR
- STL
2 stops16h 16m
Delta
Tue 7/219:24 am
STL
- LHR
2 stops15h 46m
Delta
Deal found 6/7![Delta logo]()
$1,031
This British Airways deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/74:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Tue 7/215:58 pm
STL
- LHR
1 stop11h 17m
British Airways
Deal found 6/7![British Airways logo]()
$1,033
This British Airways deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/164:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Wed 9/239:35 pm
STL
- LHR
Nonstop8h 00m
British Airways
Deal found 6/6![British Airways logo]()
$1,035
This British Airways deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/74:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Sun 7/129:40 pm
STL
- LHR
Nonstop8h 00m
British Airways
Deal found 6/7![British Airways logo]()
$1,036
This TravelUp deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/114:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Tue 9/151:54 pm
STL
- LHR
1 stop11h 01m
British Airways
Deal found 6/8![British Airways logo]()
$1,037
This KAYAK deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/3010:05 am
LHR
- STL
1 stop29h 04m
Iberia
Sat 7/48:06 pm
STL
- LHR
1 stop29h 59m
Iberia
Deal found 6/11![Iberia logo]()
$1,038
This Gotogate deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/108:40 am
LHR
- STL
2 stops16h 02m
Air Canada
Fri 7/242:40 pm
STL
- LHR
2 stops13h 20m
Air Canada
Deal found 6/9![Air Canada logo]()
$1,039
This Air Canada deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/72:05 pm
LHR
- STL
2 stops15h 24m
Multiple Airlines
Sun 7/1212:10 pm
STL
- LHR
2 stops14h 25m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$1,047
This TravelUp deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Fri 10/29:35 pm
STL
- LHR
Nonstop8h 00m
British Airways
Deal found 6/6![British Airways logo]()
$1,064
Best flights from Heathrow to St. LouisDiscover carefully curated flight deals from Heathrow to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 11, 2026.
Discover carefully curated flight deals from Heathrow to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 11, 2026.
This British Airways deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/164:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Wed 9/239:35 pm
STL
- LHR
Nonstop8h 00m
British Airways
Deal found 6/6![British Airways logo]()
$1,035
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/118:30 am
LHR
- STL
1 stop11h 32m
United Airlines
Tue 9/1511:15 am
STL
- LHR
2 stops13h 40m
United Airlines
Deal found 6/8![United Airlines logo]()
$1,080
This Lufthansa deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/246:30 am
LHR
- STL
1 stop12h 55m
Lufthansa
Fri 7/311:13 pm
STL
- LHR
1 stop11h 32m
Lufthansa
Deal found 6/9![Lufthansa logo]()
$1,114
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:30 am
LHR
- STL
2 stops14h 40m
Delta
Wed 12/236:59 pm
STL
- LHR
1 stop10h 41m
Delta
Deal found 6/10![Delta logo]()
$1,165
This British Airways deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/13:00 pm
LHR
- STL
1 stop14h 44m
British Airways
Tue 7/219:35 pm
STL
- LHR
Nonstop8h 00m
British Airways
Deal found 6/8![British Airways logo]()
$1,068
This United Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/246:50 am
LHR
- STL
2 stops14h 56m
United Airlines
Fri 7/318:35 am
STL
- LHR
1 stop21h 00m
United Airlines
Deal found 6/9![United Airlines logo]()
$1,121
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/267:30 am
LHR
- STL
2 stops16h 43m
United Airlines
Sun 8/211:25 am
STL
- LHR
1 stop13h 20m
United Airlines
Deal found 6/11![United Airlines logo]()
$1,123
This British Airways deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Fri 10/29:35 pm
STL
- LHR
Nonstop8h 00m
British Airways
Deal found 6/11![British Airways logo]()
$1,144
This British Airways deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/104:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Fri 7/249:35 pm
STL
- LHR
Nonstop8h 00m
British Airways
Deal found 6/11![British Airways logo]()
$1,151
This British Airways deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/114:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Wed 12/231:55 pm
STL
- LHR
1 stop11h 00m
British Airways
Deal found 6/10![British Airways logo]()
$1,152
Last-minute flights from Heathrow to St. LouisDiscover last-minute flight deals from Heathrow to St. Louis. Data last updated June 11, 2026 and is based on user searches.
Discover last-minute flight deals from Heathrow to St. Louis. Data last updated June 11, 2026 and is based on user searches.
This KAYAK deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/3010:05 am
LHR
- STL
1 stop29h 04m
Iberia
Sat 7/48:06 pm
STL
- LHR
1 stop29h 59m
Iberia
Deal found 6/11![Iberia logo]()
$1,038
This British Airways deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/13:00 pm
LHR
- STL
1 stop14h 44m
British Airways
Tue 7/219:35 pm
STL
- LHR
Nonstop8h 00m
British Airways
Deal found 6/8![British Airways logo]()
$1,068
This Delta deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/76:30 am
LHR
- STL
2 stops16h 16m
Delta
Tue 7/219:24 am
STL
- LHR
2 stops15h 46m
Delta
Deal found 6/7![Delta logo]()
$1,031
This British Airways deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/74:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Tue 7/215:58 pm
STL
- LHR
1 stop11h 17m
British Airways
Deal found 6/7![British Airways logo]()
$1,033
This British Airways deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/74:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Sun 7/129:40 pm
STL
- LHR
Nonstop8h 00m
British Airways
Deal found 6/7![British Airways logo]()
$1,036
This Air Canada deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/72:05 pm
LHR
- STL
2 stops15h 24m
Multiple Airlines
Sun 7/1212:10 pm
STL
- LHR
2 stops14h 25m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$1,047
This Gotogate deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/108:40 am
LHR
- STL
2 stops16h 02m
Air Canada
Fri 7/242:40 pm
STL
- LHR
2 stops13h 20m
Air Canada
Deal found 6/9![Air Canada logo]()
$1,039
This ChecknFly deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:30 am
LHR
- STL
1 stop12h 55m
Multiple Airlines
Tue 7/2812:10 pm
STL
- LHR
1 stop12h 20m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$1,066
One-way flights from Heathrow to St. LouisSearch for one-way flight options from Heathrow to St. Louis. Find affordable one-way fares based on user searches. Data last updated June 11, 2026.
Search for one-way flight options from Heathrow to St. Louis. Find affordable one-way fares based on user searches. Data last updated June 11, 2026.
This deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/32:50 pm
LHR
- STL
1 stop14h 54m
United Airlines
Deal found 6/9![United Airlines logo]()
$474
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/29:55 am
LHR
- STL
3 stops52h 57m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$485
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:50 pm
LHR
- STL
3 stops50h 40m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$494
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/88:50 pm
LHR
- STL
3 stops42h 50m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$505
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/99:55 am
LHR
- STL
3 stops29h 45m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$512
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/298:50 pm
LHR
- STL
3 stops42h 50m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$517
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:50 pm
LHR
- STL
3 stops42h 50m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$524
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/38:50 pm
LHR
- STL
3 stops47h 58m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$526
This Booking.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:30 pm
LHR
- STL
1 stop23h 55m
Lufthansa
Deal found 6/10![Lufthansa logo]()
$528
Find flight deals from Heathrow to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,031 (Delta) |
One-way from | $474 |
Popular in | July |
Cheapest in | February |
Average price | $1,157 |
Good round-trip deal | $1,295 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Heathrow to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 11, 2026.
Use the filters below to find and compare flights from London Heathrow Airport to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Wed 9/16
4:25 pm-7:30 pm
Nonstop9h 05m
Lambert-St Louis
Wed 9/23
9:35 pm-11:35 am
Nonstop8h 00m
$1,035
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Wed 7/1
3:00 pm-11:44 pm
1 stop14h 44m
Lambert-St Louis
Tue 7/21
9:35 pm-11:35 am
Nonstop8h 00m
$1,068
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Tue 8/11
8:30 am-2:02 pm
1 stop11h 32m
Lambert-St Louis
Tue 9/15
11:15 am-6:55 am
2 stops13h 40m
$1,080
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Fri 7/24
6:30 am-1:25 pm
1 stop12h 55m
Lambert-St Louis
Fri 7/31
1:13 pm-6:45 am
1 stop11h 32m
$1,114
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Fri 7/24
6:50 am-3:46 pm
2 stops14h 56m
Lambert-St Louis
Fri 7/31
8:35 am-11:35 am
1 stop21h 00m
$1,121
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Sun 7/26
7:30 am-6:13 pm
2 stops16h 43m
Lambert-St Louis
Sun 8/2
11:25 am-6:45 am
1 stop13h 20m
$1,123
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Wed 9/23
4:25 pm-7:30 pm
Nonstop9h 05m
Lambert-St Louis
Fri 10/2
9:35 pm-11:35 am
Nonstop8h 00m
$1,144
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Fri 7/10
4:25 pm-7:30 pm
Nonstop9h 05m
Lambert-St Louis
Fri 7/24
9:35 pm-11:35 am
Nonstop8h 00m
$1,151
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Tue 8/11
4:25 pm-7:30 pm
Nonstop9h 05m
Lambert-St Louis
Wed 12/23
1:55 pm-6:55 am
1 stop11h 00m
$1,152
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Tue 8/11
6:30 am-3:10 pm
2 stops14h 40m
Lambert-St Louis
Wed 12/23
6:59 pm-11:40 am
1 stop10h 41m
$1,165
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from Heathrow to St. Louis
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to St. Louis in June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on London Heathrow Airport-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on London Heathrow Airport-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Heathrow to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Heathrow with our price prediction graph.
LHR-STL
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from London Heathrow Airport to St. Louis
Prices
Delays
How far ahead should I book a flight from London Heathrow Airport to St. Louis?
The best time to book flights from London Heathrow Airport to St. Louis is 71 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from London Heathrow Airport to St. Louis?
Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to St. Louis (average of $745). Flying from London Heathrow Airport to St. Louis in July is currently the most expensive (average of $1,347). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from LHR to STL?
Find hourly flight availability from Heathrow to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 11, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to St. Louis as you normally would.
How often are flights from London to St. Louis delayed?
About 0% of weekly flights between London and St. Louis have experienced delays in the past year, with the average delay time being 0 minutes.
What is the most punctual flight time for London to St. Louis flights?
Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
Reviews of airlines servicing St. Louis
Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated June 11, 2026.
Peruse reviews from past customers who have flown with American Airlines and British Airways from London Heathrow Airport to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
6.9
Overall
7.1
Crew
7.9
Comfort
7.2
Food
6.4
Boarding
7.5
Reviews
1 / 20
10.0
ExcellentBeatriz,May 2026
HEL - DFW
Entertainment
6.9
Overall
7.1
Crew
7.9
Comfort
7.2
Food
6.4
Boarding
7.5
Reviews
1 / 20
10.0
ExcellentBeatriz,May 2026
HEL - DFW
Entertainment
6.9
Overall
7.1
Crew
7.9
Comfort
7.2
Food
6.4
Boarding
7.5
Reviews
1 / 20
10.0
ExcellentBeatriz,May 2026
HEL - DFW
Related info for your journey
Find useful and relevant information for your journey from Heathrow to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington
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Top 2 airlines flying from Heathrow to St. Louis
Discover the top 2 airlines that operate flights from Heathrow to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$692 | Average$1,143 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$791 | Average$962 | FlexibilityNo cancel fee | On-time70% |