$489+ Cheap flights from Heathrow (LHR) to St. Louis (STL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — STL
Oct 6 — Oct 131
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.Cheapflights Tip: The best prices from London Heathrow to Lambert-St Louis are usually found in February or March, booked 71 days in advance, depart on a Monday or Wednesday and return on a Thursday
Cheap flight deals from Heathrow to St. Louis
Cheapest
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 September 6, 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 September 6, 2026.
This Booking.com deal was found by Cheapflights users on 9/5. 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.
Fri 9/181:10 pm -
1 stop13h 34m
Wed 9/239:35 pm -
Nonstop8h 00m
Deal found 9/5![British Airways logo]()
$870
This Delta deal was found by Cheapflights users on 9/5. 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.
Fri 9/186:30 am -
2 stops16h 40m
Thu 9/2410:05 am -
2 stops14h 15m
Deal found 9/5![Delta logo]()
$871
This Air Canada deal was found by Cheapflights users on 9/1. 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.
Fri 10/168:40 am -
2 stops17h 40m
Fri 10/2312:10 pm -
1 stop12h 20m
Deal found 9/1![Air Canada logo]()
$875
This Travcart deal was found by Cheapflights users on 9/1. 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 Travcart is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1611:15 am -
1 stop13h 08m
Fri 10/232:38 pm -
1 stop10h 32m
Deal found 9/1![Virgin Atlantic logo]()
$877
This Lufthansa deal was found by Cheapflights users on 9/1. 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 10/166:30 am -
1 stop12h 55m
Fri 10/2312:20 pm -
1 stop12h 55m
Deal found 9/1![Multiple Airlines logo]()
$878
This Air Canada deal was found by Cheapflights users on 9/4. 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 10/208:45 am -
2 stops17h 35m
Tue 11/310:53 am -
2 stops13h 37m
Deal found 9/4![Multiple Airlines logo]()
$879
This Expedia deal was found by Cheapflights users on 9/4. 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.
Tue 11/246:30 am -
2 stops21h 10m
Tue 1/511:51 am -
1 stop12h 34m
Deal found 9/4![Multiple Airlines logo]()
$882
This TravelUp deal was found by Cheapflights users on 9/4. 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 11/245:05 pm -
2 stops33h 24m
Tue 1/511:51 am -
2 stops37h 29m
Deal found 9/4![Virgin Atlantic logo]()
$883
This Cheapflightsfares deal was found by Cheapflights users on 9/1. 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.
Sat 10/172:10 pm -
1 stop13h 11m
Fri 10/2312:20 pm -
1 stop11h 35m
Deal found 9/1![Lufthansa logo]()
$885
This ChecknFly deal was found by Cheapflights users on 9/4. 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 11/245:30 pm -
1 stop26h 15m
Tue 1/55:20 pm -
1 stop21h 15m
Deal found 9/4![Lufthansa logo]()
$889
This American Airlines deal was found by Cheapflights users on 9/5. 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.
Fri 9/182:25 pm -
1 stop12h 19m
Tue 9/229:35 pm -
Nonstop8h 00m
Deal found 9/5![American Airlines logo]()
$890
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 September 6, 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 September 6, 2026.
This Delta deal was found by Cheapflights users on 9/5. 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.
Fri 9/189:55 am -
2 stops16h 03m
Thu 9/2410:05 am -
1 stop14h 20m
Deal found 9/5![Delta logo]()
$871
This Lufthansa deal was found by Cheapflights users on 9/1. 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 10/166:30 am -
1 stop12h 55m
Fri 10/2312:20 pm -
1 stop12h 55m
Deal found 9/1![Multiple Airlines logo]()
$878
This British Airways deal was found by Cheapflights users on 9/4. 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 10/22:25 pm -
1 stop12h 19m
Fri 10/99:35 pm -
Nonstop8h 00m
Deal found 9/4![British Airways logo]()
$905
This United Airlines deal was found by Cheapflights users on 9/2. 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.
Thu 10/158:30 am -
1 stop17h 50m
Mon 10/1911:35 am -
1 stop14h 55m
Deal found 9/2![United Airlines logo]()
$908
This Air Canada deal was found by Cheapflights users on 9/1. 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.
Fri 10/169:30 am -
1 stop15h 11m
Fri 10/2312:10 pm -
1 stop15h 50m
Deal found 9/1![Air Canada logo]()
$909
This Scandinavian Airlines deal was found by Cheapflights users on 9/1. 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.
Fri 10/166:40 am -
3 stops20h 43m
Fri 10/232:25 pm -
2 stops19h 35m
Deal found 9/1![Scandinavian Airlines logo]()
$994
This Expedia deal was found by Cheapflights users on 9/5. 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.
Sat 1/211:45 am -
2 stops39h 02m
Fri 1/156:45 am -
2 stops18h 30m
Deal found 9/5![Virgin Atlantic logo]()
$1,018
This United Airlines deal was found by Cheapflights users on 9/5. 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 10/257:30 am -
2 stops16h 53m
Sun 11/16:00 am -
1 stop24h 00m
Deal found 9/5![United Airlines logo]()
$957
This United Airlines deal was found by Cheapflights users on 9/4. 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.
Mon 10/196:50 am -
2 stops14h 53m
Mon 10/2611:29 am -
1 stop17h 56m
Deal found 9/4![United Airlines logo]()
$957
This United Airlines deal was found by Cheapflights users on 9/4. 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.
Sat 10/173:05 pm -
2 stops37h 25m
Fri 10/306:10 am -
1 stop10h 10m
Deal found 9/4![United Airlines logo]()
$982
This United Airlines deal was found by Cheapflights users on 9/3. 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 10/188:30 am -
1 stop11h 30m
Sun 10/251:08 pm -
2 stops15h 02m
Deal found 9/3![United Airlines logo]()
$989
Last-minute flights from Heathrow to St. LouisDiscover last-minute flight deals from Heathrow to St. Louis. Data last updated September 6, 2026 and is based on user searches.
Discover last-minute flight deals from Heathrow to St. Louis. Data last updated September 6, 2026 and is based on user searches.
This The Travel House deal was found by Cheapflights users on 9/1. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/169:45 am -
1 stop13h 03m
Wed 9/239:35 pm -
Nonstop8h 00m
Deal found 9/1![Finnair logo]()
$899
This Booking.com deal was found by Cheapflights users on 9/5. 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.
Fri 9/181:10 pm -
1 stop13h 34m
Wed 9/239:35 pm -
Nonstop8h 00m
Deal found 9/5![British Airways logo]()
$870
This Delta deal was found by Cheapflights users on 9/5. 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.
Fri 9/186:30 am -
2 stops16h 40m
Thu 9/2410:05 am -
2 stops14h 15m
Deal found 9/5![Delta logo]()
$871
This American Airlines deal was found by Cheapflights users on 9/5. 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.
Fri 9/182:25 pm -
1 stop12h 19m
Tue 9/229:35 pm -
Nonstop8h 00m
Deal found 9/5![American Airlines logo]()
$890
This American Airlines deal was found by Cheapflights users on 9/1. 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.
Sun 9/209:15 am -
1 stop18h 28m
Tue 10/69:35 pm -
Nonstop8h 00m
Deal found 9/1![Multiple Airlines logo]()
$893
This Air Canada deal was found by Cheapflights users on 9/1. 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.
Fri 10/168:40 am -
2 stops17h 40m
Fri 10/2312:10 pm -
1 stop12h 20m
Deal found 9/1![Air Canada logo]()
$875
This Travcart deal was found by Cheapflights users on 9/1. 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 Travcart is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1611:15 am -
1 stop13h 08m
Fri 10/232:38 pm -
1 stop10h 32m
Deal found 9/1![Virgin Atlantic logo]()
$877
This Lufthansa deal was found by Cheapflights users on 9/1. 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 10/166:30 am -
1 stop12h 55m
Fri 10/2312:20 pm -
1 stop12h 55m
Deal found 9/1![Multiple Airlines logo]()
$878
This Travcart deal was found by Cheapflights users on 9/1. 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 Travcart is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/162:45 pm -
1 stop12h 12m
Fri 10/239:35 pm -
Nonstop8h 00m
Deal found 9/1![Finnair logo]()
$892
This Cheapflightsfares deal was found by Cheapflights users on 9/1. 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.
Sat 10/172:10 pm -
1 stop13h 11m
Fri 10/2312:20 pm -
1 stop11h 35m
Deal found 9/1![Lufthansa logo]()
$885
This Air Canada deal was found by Cheapflights users on 9/4. 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 10/208:45 am -
2 stops17h 35m
Tue 11/310:53 am -
2 stops13h 37m
Deal found 9/4![Multiple Airlines logo]()
$879
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 September 6, 2026.
Search for one-way flight options from Heathrow to St. Louis. Find affordable one-way fares based on user searches. Data last updated September 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 11/312:15 pm -
3 stops35h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$489
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 11/48:50 pm -
3 stops50h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Multiple Airlines logo]()
$490
This Kiwi.com deal was found by Cheapflights users on 9/1. 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 11/28:35 pm -
3 stops51h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Multiple Airlines logo]()
$494
This Booking.com deal was found by Cheapflights users on 9/5. 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.
Wed 12/96:30 am -
1 stop13h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Lufthansa logo]()
$496
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 12/712:15 pm -
2 stops18h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$535
This Expedia deal was found by Cheapflights users on 9/3. 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 12/26:30 am -
1 stop13h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Lufthansa logo]()
$536
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 12/112:15 pm -
2 stops18h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$538
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 September 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $870 (Booking.com) |
One-way from | $489 (Kiwi.com) |
Popular in | August |
Cheapest in | February |
Average price | $927 |
Good one-way deal | $583 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 7,457,451 searches. Data last updated September 6, 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 London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Wed 12/2
6:30 am-1:45 pm
1 stop13h 15m
Lambert-St Louis
Wed 12/31
12:00 am-7:00 am
Nonstop0h 00m
$552
LondonSt. Louis
LHR London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Wed 11/4
6:30 am-1:45 pm
1 stop13h 15m
Lambert-St Louis
Wed 12/31
12:00 am-7:00 am
Nonstop0h 00m
$552
LondonSt. Louis
LHR London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Tue 3/2
9:00 am-9:13 pm
2 stops18h 13m
Lambert-St Louis
Wed 12/31
12:00 am-7:00 am
Nonstop0h 00m
$562
LondonSt. Louis
LHR London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Mon 3/1
6:35 am-11:09 pm
2 stops22h 34m
Lambert-St Louis
Wed 12/31
12:00 am-7:00 am
Nonstop0h 00m
$565
LondonSt. Louis
LHR London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Mon 11/2
11:35 am-4:57 pm
1 stop35h 22m
Lambert-St Louis
Wed 12/31
12:00 am-7:00 am
Nonstop0h 00m
$590
LondonSt. Louis
LHR London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Mon 11/30
6:00 pm-3:26 pm
1 stop27h 26m
Lambert-St Louis
Wed 12/31
12:00 am-7:00 am
Nonstop0h 00m
$593
LondonSt. Louis
LHR London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Sun 12/6
6:30 am-1:45 pm
1 stop13h 15m
Lambert-St Louis
Wed 12/31
12:00 am-7:00 am
Nonstop0h 00m
$608
LondonSt. Louis
LHR London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Fri 11/6
6:30 am-1:45 pm
1 stop13h 15m
Lambert-St Louis
Wed 12/31
12:00 am-7:00 am
Nonstop0h 00m
$608
LondonSt. Louis
LHR London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Fri 10/30
6:30 am-2:45 pm
1 stop13h 15m
Lambert-St Louis
Wed 12/31
12:00 am-7:00 am
Nonstop0h 00m
$608
LondonSt. Louis
LHR London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Fri 9/18
9:55 am-7:58 pm
2 stops16h 03m
Lambert-St Louis
Thu 9/24
10:05 am-6:25 am
1 stop14h 20m
$871
Showing 1-10 of 20 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 September.
| 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 70 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 $722). Flying from London Heathrow Airport to St. Louis in August is currently the most expensive (average of $1,460). 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 September 6, 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 17% of weekly flights between London and St. Louis have experienced delays in the past year, with the average delay time being 112 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.
What day of the week experiences the fewest flight delays on this route?
Friday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on London to St. Louis flights?
Over the last year, British Airways have had the lowest number of delays on this route, with just 17% of flights being delayed.
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 September 6, 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.
Overall
7.1
Comfort
7.2
Crew
7.9
Boarding
7.5
Food
6.4
Entertainment
6.8
Reviews
1 / 20
10.0
ExcellentRon,Aug 2026
LHR - LAX
Overall
7.1
Comfort
7.2
Crew
7.9
Boarding
7.5
Food
6.4
Entertainment
6.8
Reviews
1 / 20
10.0
ExcellentRon,Aug 2026
LHR - LAX
Overall
7.1
Comfort
7.2
Crew
7.9
Boarding
7.5
Food
6.4
Entertainment
6.8
Reviews
1 / 20
10.0
ExcellentRon,Aug 2026
LHR - LAX
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
Fairview Heights
O'Fallon
Fenton
Swansea
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
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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 7,457,451 searches. Data last updated September 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$791 | Average$1,005 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$803 | Average$1,384 | FlexibilityNo cancel fee | On-time71% |