$478+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — STL
May 17 — May 241
Round-trip
1 adult, Economy
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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 April 17, 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 April 17, 2026.
This deal was found by Cheapflights users on 4/15. 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.
Tue 5/510:45 am
LHR
- STL
1 stop11h 57m
Delta
Sat 5/234:00 pm
STL
- LHR
1 stop15h 05m
Delta
Deal found 4/15![Delta logo]()
$825
This TravelUp deal was found by Cheapflights users on 4/13. 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 9/24:25 pm
LHR
- STL
Nonstop9h 05m
Multiple Airlines
Wed 9/233:33 pm
STL
- LHR
1 stop15h 17m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$827
This TravelUp deal was found by Cheapflights users on 4/16. 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 9/24:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Wed 9/234:47 pm
STL
- LHR
1 stop10h 38m
British Airways
Deal found 4/16![British Airways logo]()
$830
This deal was found by Cheapflights users on 4/15. 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.
Mon 5/111:25 pm
LHR
- STL
1 stop16h 34m
Delta
Sun 5/175:34 pm
STL
- LHR
1 stop13h 31m
Delta
Deal found 4/15![Delta logo]()
$834
This TravelUp deal was found by Cheapflights users on 4/14. 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 9/810:05 am
LHR
- STL
1 stop16h 21m
Multiple Airlines
Tue 9/228:07 pm
STL
- LHR
1 stop10h 08m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$836
This TravelUp deal was found by Cheapflights users on 4/14. 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 9/27:30 am
LHR
- STL
2 stops22h 21m
Finnair
Wed 9/2312:43 pm
STL
- LHR
1 stop14h 22m
Finnair
Deal found 4/14![Finnair logo]()
$845
This American Airlines deal was found by Cheapflights users on 4/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/94:25 pm
LHR
- STL
Nonstop9h 05m
American Airlines
Mon 9/215:40 am
STL
- LHR
1 stop18h 40m
American Airlines
Deal found 4/14![American Airlines logo]()
$850
This TravelUp deal was found by Cheapflights users on 4/16. 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 9/87:30 am
LHR
- STL
2 stops22h 21m
Finnair
Tue 9/2212:43 pm
STL
- LHR
1 stop14h 22m
Finnair
Deal found 4/16![Finnair logo]()
$852
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 April 17, 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 April 17, 2026.
This British Airways deal was found by Cheapflights users on 4/13. 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 9/306:45 am
LHR
- STL
2 stops20h 38m
British Airways
Sun 10/48:07 pm
STL
- LHR
1 stop33h 08m
British Airways
Deal found 4/13![British Airways logo]()
$862
This Delta deal was found by Cheapflights users on 4/13. 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.
Wed 9/26:30 am
LHR
- STL
2 stops16h 19m
Delta
Wed 9/231:30 pm
STL
- LHR
2 stops14h 50m
Delta
Deal found 4/13![Delta logo]()
$879
This Virgin Atlantic deal was found by Cheapflights users on 4/12. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1211:30 am
LHR
- STL
2 stops15h 39m
Virgin Atlantic
Tue 5/1910:19 am
STL
- LHR
2 stops14h 26m
Virgin Atlantic
Deal found 4/12![Virgin Atlantic logo]()
$979
This Scandinavian Airlines deal was found by Cheapflights users on 4/16. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:40 am
LHR
- STL
2 stops22h 57m
Scandinavian Airlines
Mon 9/283:42 pm
STL
- LHR
2 stops18h 18m
Scandinavian Airlines
Deal found 4/16![Scandinavian Airlines logo]()
$984
This Delta deal was found by Cheapflights users on 4/17. 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 9/86:30 am
LHR
- STL
2 stops17h 32m
Delta
Tue 9/221:30 pm
STL
- LHR
2 stops14h 50m
Delta
Deal found 4/17![Delta logo]()
$884
This British Airways deal was found by Cheapflights users on 4/13. 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 5/1912:30 pm
LHR
- STL
1 stop12h 59m
British Airways
Thu 5/2811:18 am
STL
- LHR
1 stop13h 32m
British Airways
Deal found 4/13![British Airways logo]()
$1,035
This Delta deal was found by Cheapflights users on 4/16. 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 5/56:30 am
LHR
- STL
2 stops17h 14m
Delta
Tue 5/121:27 pm
STL
- LHR
2 stops14h 53m
Delta
Deal found 4/16![Delta logo]()
$977
This British Airways deal was found by Cheapflights users on 4/15. 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 7/36:15 am
LHR
- STL
2 stops20h 14m
British Airways
Wed 7/225:18 pm
STL
- LHR
1 stop12h 52m
British Airways
Deal found 4/15![British Airways logo]()
$1,057
This Delta deal was found by Cheapflights users on 4/12. 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.
Wed 5/276:30 am
LHR
- STL
2 stops16h 16m
Delta
Wed 6/310:19 am
STL
- LHR
2 stops16h 31m
Delta
Deal found 4/12![Delta logo]()
$1,041
This British Airways deal was found by Cheapflights users on 4/15. 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.
Thu 7/29:15 am
LHR
- STL
1 stop20h 17m
British Airways
Tue 7/215:11 pm
STL
- LHR
1 stop12h 04m
British Airways
Deal found 4/15![British Airways logo]()
$1,083
This Delta deal was found by Cheapflights users on 4/13. 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.
Wed 5/203:15 pm
LHR
- STL
1 stop14h 44m
Delta
Sun 5/244:25 pm
STL
- LHR
1 stop16h 10m
Delta
Deal found 4/13![Delta logo]()
$1,058
Last-minute flights from Heathrow to St. LouisDiscover last-minute flight deals from Heathrow to St. Louis. Data last updated April 17, 2026 and is based on user searches.
Discover last-minute flight deals from Heathrow to St. Louis. Data last updated April 17, 2026 and is based on user searches.
This deal was found by Cheapflights users on 4/15. 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.
Tue 5/510:45 am
LHR
- STL
1 stop11h 57m
Delta
Sat 5/234:00 pm
STL
- LHR
1 stop15h 05m
Delta
Deal found 4/15![Delta logo]()
$825
This deal was found by Cheapflights users on 4/15. 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.
Tue 5/53:15 pm
LHR
- STL
1 stop14h 21m
Delta
Sun 5/177:01 pm
STL
- LHR
1 stop12h 14m
Delta
Deal found 4/15![Delta logo]()
$868
This deal was found by Cheapflights users on 4/15. 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.
Thu 5/71:25 pm
LHR
- STL
1 stop16h 34m
Delta
Sat 5/234:00 pm
STL
- LHR
1 stop15h 05m
Delta
Deal found 4/15![Delta logo]()
$855
This deal was found by Cheapflights users on 4/15. 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.
Fri 5/84:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Tue 5/199:35 pm
STL
- LHR
Nonstop8h 00m
British Airways
Deal found 4/15![British Airways logo]()
$864
This deal was found by Cheapflights users on 4/15. 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.
Mon 5/111:25 pm
LHR
- STL
1 stop16h 34m
Delta
Sun 5/175:34 pm
STL
- LHR
1 stop13h 31m
Delta
Deal found 4/15![Delta logo]()
$834
This Delta deal was found by Cheapflights users on 4/13. 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.
Mon 5/116:30 am
LHR
- STL
2 stops16h 16m
Delta
Mon 5/189:15 am
STL
- LHR
1 stop16h 00m
Delta
Deal found 4/13![Delta logo]()
$879
This TravelUp deal was found by Cheapflights users on 4/14. 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 5/124:25 pm
LHR
- STL
1 stop33h 05m
Multiple Airlines
Tue 5/1911:45 am
STL
- LHR
1 stop14h 15m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$836
This ChecknFly deal was found by Cheapflights users on 4/14. 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 5/122:45 pm
LHR
- STL
1 stop15h 11m
Finnair
Tue 5/196:35 am
STL
- LHR
2 stops19h 25m
Finnair
Deal found 4/14![Finnair logo]()
$883
This KAYAK deal was found by Cheapflights users on 4/12. 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 5/122:45 pm
LHR
- STL
1 stop13h 34m
Iberia
Tue 5/1911:06 am
STL
- LHR
1 stop17h 59m
Iberia
Deal found 4/12![Iberia logo]()
$902
This Expedia deal was found by Cheapflights users on 4/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/139:20 am
LHR
- STL
1 stop12h 50m
Virgin Atlantic
Wed 5/201:27 pm
STL
- LHR
2 stops17h 08m
Virgin Atlantic
Deal found 4/15![Virgin Atlantic logo]()
$877
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 April 17, 2026.
Search for one-way flight options from Heathrow to St. Louis. Find affordable one-way fares based on user searches. Data last updated April 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/16. 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.
Mon 5/49:55 am
LHR
- STL
3 stops53h 00m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$478
This Kiwi.com deal was found by Cheapflights users on 4/12. 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.
Sun 6/78:50 pm
LHR
- STL
3 stops50h 40m
Multiple Airlines
Deal found 4/12![Multiple Airlines logo]()
$512
This Kiwi.com deal was found by Cheapflights users on 4/17. 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 6/98:50 pm
LHR
- STL
3 stops51h 28m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$525
This Kiwi.com deal was found by Cheapflights users on 4/16. 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.
Sun 5/108:50 pm
LHR
- STL
3 stops50h 43m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$536
This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:30 am
LHR
- STL
1 stop12h 55m
Lufthansa
Deal found 4/14![Lufthansa logo]()
$537
This Cheapflightsfares deal was found by Cheapflights users on 4/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:30 am
LHR
- STL
1 stop12h 55m
Lufthansa
Deal found 4/16![Lufthansa logo]()
$540
This Kiwi.com deal was found by Cheapflights users on 4/15. 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.
Sun 6/148:50 pm
LHR
- STL
3 stops50h 40m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$544
This Priceline deal was found by Cheapflights users on 4/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:40 am
LHR
- STL
2 stops16h 02m
Air Canada
Deal found 4/16![Air Canada logo]()
$545
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/63:10 pm
LHR
- STL
3 stops53h 29m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$546
This Kiwi.com deal was found by Cheapflights users on 4/16. 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.
Mon 6/159:55 am
LHR
- STL
3 stops37h 35m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$550
This Kiwi.com deal was found by Cheapflights users on 4/15. 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.
Mon 5/187:50 pm
LHR
- STL
3 stops43h 05m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$555
This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:25 pm
LHR
- STL
2 stops23h 00m
Lufthansa
Deal found 4/14![Lufthansa logo]()
$556
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 April 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $825 |
One-way from | $478 (Kiwi.com) |
Popular in | July |
Cheapest in | February |
Average price | $979 |
Good round-trip deal | $1,017 or less |
Good one-way deal | $679 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 April 17, 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
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Wed 9/30
6:45 am-9:23 pm
2 stops20h 38m
Lambert-St Louis
Sun 10/4
8:07 pm-11:15 am
1 stop33h 08m
$862
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Wed 9/2
6:30 am-4:49 pm
2 stops16h 19m
Lambert-St Louis
Wed 9/23
1:30 pm-10:20 am
2 stops14h 50m
$879
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Tue 9/8
6:30 am-6:02 pm
2 stops17h 32m
Lambert-St Louis
Tue 9/22
1:30 pm-10:20 am
2 stops14h 50m
$884
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Tue 5/5
6:30 am-5:44 pm
2 stops17h 14m
Lambert-St Louis
Tue 5/12
1:27 pm-10:20 am
2 stops14h 53m
$977
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Tue 5/12
11:30 am-9:09 pm
2 stops15h 39m
Lambert-St Louis
Tue 5/19
10:19 am-6:45 am
2 stops14h 26m
$979
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Thu 9/24
6:40 am-11:37 pm
2 stops22h 57m
Lambert-St Louis
Mon 9/28
3:42 pm-4:00 pm
2 stops18h 18m
$984
Quickest round-trip
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Tue 5/19
12:30 pm-7:29 pm
1 stop12h 59m
Lambert-St Louis
Thu 5/28
11:18 am-6:50 am
1 stop13h 32m
$1,035
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Wed 5/27
6:30 am-4:46 pm
2 stops16h 16m
Lambert-St Louis
Wed 6/3
10:19 am-8:50 am
2 stops16h 31m
$1,041
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Fri 7/3
6:15 am-8:29 pm
2 stops20h 14m
Lambert-St Louis
Wed 7/22
5:18 pm-12:10 pm
1 stop12h 52m
$1,057
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Wed 5/20
3:15 pm-11:59 pm
1 stop14h 44m
Lambert-St Louis
Sun 5/24
4:25 pm-2:35 pm
1 stop16h 10m
$1,058
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 April.
| 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
How far ahead should I book a flight from London Heathrow Airport to St. Louis?
Use this chart to determine the optimal time to book a round-trip flight from Heathrow to St. Louis. Price data was last updated on April 10, 2026.
The best time to book flights from London Heathrow Airport to St. Louis is 72 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 $744). Flying from London Heathrow Airport to St. Louis in July is currently the most expensive (average of $1,161). 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.
How much does it cost to fly round-trip from London Heathrow Airport to St. Louis?
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 April 17, 2026.
Peruse reviews from past customers who have flown with United Airlines,American Airlines, andBritish 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.
Food
6.6
Entertainment
7.1
Overall
7.4
Comfort
7.3
Boarding
7.7
Crew
8.1
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Food
6.6
Entertainment
7.1
Overall
7.4
Comfort
7.3
Boarding
7.7
Crew
8.1
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Food
6.6
Entertainment
7.1
Overall
7.4
Comfort
7.3
Boarding
7.7
Crew
8.1
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Food
6.6
Entertainment
7.1
Overall
7.4
Comfort
7.3
Boarding
7.7
Crew
8.1
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
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
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus
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Complete your trip
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Heathrow and St. Louis flights
Browse other Heathrow and St. Louis flight options. Last updated on April 17, 2026.
Other flights from Heathrow
Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on April 17, 2026.
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Other flights to St. Louis
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 17, 2026.
Top 3 airlines flying from Heathrow to St. Louis
Discover the top 3 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 April 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$555 | Average$849 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$654 | Average$857 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$692 | Average$1,384 | FlexibilityNo cancel fee | On-time71% |