$349+ Cheap flights from St. Louis (STL) to Heathrow (LHR)
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 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LHR
Nov 29 — Dec 61
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Heathrow 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 Lambert-St Louis to London Heathrow are usually found in April or March, booked 6 days in advance, depart on a Thursday or Monday and return on a Monday
Cheap flight deals from St. Louis to Heathrow
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to HeathrowExplore the most affordable flight options available from St. Louis to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2026.
Explore the most affordable flight options available from St. Louis to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2026.
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/96:20 pm -
3 stops34h 30m
Wed 12/1612:15 pm -
3 stops34h 35m
Deal found 10/29![Multiple Airlines logo]()
$916
This Trip.com deal was found by Cheapflights users on 10/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/24:05 pm -
1 stop13h 15m
Wed 1/206:00 pm -
1 stop27h 26m
Deal found 10/25![Air Canada logo]()
$937
This SmartFares deal was found by Cheapflights users on 10/26. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/304:05 pm -
1 stop10h 25m
Wed 12/96:30 am -
1 stop13h 15m
Deal found 10/26![Multiple Airlines logo]()
$942
This Expedia deal was found by Cheapflights users on 10/25. 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 12/22:17 pm -
1 stop11h 28m
Wed 1/206:30 am -
2 stops17h 31m
Deal found 10/25![KLM logo]()
$954
This FlightHub deal was found by Cheapflights users on 10/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/412:36 pm -
2 stops21h 24m
Tue 12/85:00 pm -
2 stops34h 38m
Deal found 10/29![Scandinavian Airlines logo]()
$965
This Justfly.com deal was found by Cheapflights users on 10/25. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/232:31 pm -
2 stops19h 29m
Tue 12/157:30 pm -
2 stops34h 35m
Deal found 10/25![Scandinavian Airlines logo]()
$966
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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 12/86:55 pm -
2 stops14h 55m
Wed 12/166:30 am -
1 stop13h 15m
Deal found 10/29![Lufthansa logo]()
$967
This Scandinavian Airlines deal was found by Cheapflights users on 10/26. 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.
Mon 11/302:31 pm -
2 stops21h 09m
Wed 12/96:40 am -
2 stops23h 25m
Deal found 10/26![Scandinavian Airlines logo]()
$971
This Justfly.com deal was found by Cheapflights users on 10/25. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/14:05 pm -
1 stop13h 15m
Wed 1/206:30 am -
1 stop13h 15m
Deal found 10/25![Multiple Airlines logo]()
$972
This Gotogate deal was found by Cheapflights users on 10/29. 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.
Sun 11/293:40 pm -
1 stop15h 10m
Tue 12/87:30 pm -
1 stop24h 15m
Deal found 10/29![Lufthansa logo]()
$973
Best flights from St. Louis to HeathrowDiscover carefully curated flight deals from St. Louis to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.
Discover carefully curated flight deals from St. Louis to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.
This Scandinavian Airlines deal was found by Cheapflights users on 10/25. 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.
Wed 3/311:51 am -
2 stops24h 39m
Mon 3/86:40 am -
2 stops22h 59m
Deal found 10/25![Scandinavian Airlines logo]()
$988
This United Airlines deal was found by Cheapflights users on 10/29. 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 2/210:48 am -
2 stops14h 22m
Sat 2/69:00 am -
2 stops16h 28m
Deal found 10/29![United Airlines logo]()
$988
This Delta deal was found by Cheapflights users on 10/29. 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 12/27:03 am -
1 stop17h 22m
Fri 12/1110:00 am -
2 stops17h 38m
Deal found 10/29![Delta logo]()
$994
This United Airlines deal was found by Cheapflights users on 10/26. 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 3/110:55 am -
2 stops13h 45m
Sat 3/66:50 am -
2 stops15h 22m
Deal found 10/26![United Airlines logo]()
$991
This Scandinavian Airlines deal was found by Cheapflights users on 10/26. 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.
Sun 4/253:40 pm -
2 stops20h 00m
Mon 5/37:05 am -
3 stops22h 34m
Deal found 10/26![Scandinavian Airlines logo]()
$996
This Delta deal was found by Cheapflights users on 10/29. 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.
Sun 11/297:13 am -
1 stop19h 47m
Tue 12/86:20 am -
2 stops17h 53m
Deal found 10/29![Delta logo]()
$1,002
This Delta deal was found by Cheapflights users on 10/28. 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.
Thu 1/145:44 pm -
2 stops14h 01m
Fri 1/2210:00 am -
2 stops16h 50m
Deal found 10/28![Delta logo]()
$1,060
This United Airlines deal was found by Cheapflights users on 10/25. 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 12/43:40 pm -
1 stop15h 10m
Tue 12/85:30 pm -
1 stop26h 15m
Deal found 10/25![United Airlines logo]()
$1,069
This Delta deal was found by Cheapflights users on 10/26. 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 12/1610:06 am -
2 stops15h 49m
Tue 1/128:40 am -
2 stops18h 14m
Deal found 10/26![Delta logo]()
$1,062
This United Airlines deal was found by Cheapflights users on 10/29. 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 11/2710:53 am -
2 stops14h 17m
Sat 12/59:00 am -
2 stops16h 26m
Deal found 10/29![United Airlines logo]()
$1,096
Last-minute flights from St. Louis to HeathrowDiscover last-minute flight deals from St. Louis to Heathrow. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Heathrow. Data last updated October 30, 2026 and is based on user searches.
This Icelandair deal was found by Cheapflights users on 10/27. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/178:25 am -
2 stops20h 25m
Tue 11/2412:15 pm -
2 stops18h 35m
Deal found 10/27![Multiple Airlines logo]()
$990
This Justfly.com deal was found by Cheapflights users on 10/25. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/232:31 pm -
2 stops19h 29m
Tue 12/157:30 pm -
2 stops34h 35m
Deal found 10/25![Scandinavian Airlines logo]()
$966
This Cheapflightsfares deal was found by Cheapflights users on 10/25. 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.
Mon 11/231:00 pm -
2 stops17h 50m
Tue 12/157:30 pm -
1 stop24h 15m
Deal found 10/25![Lufthansa logo]()
$986
This Gotogate deal was found by Cheapflights users on 10/25. 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.
Mon 11/234:05 pm -
1 stop10h 25m
Tue 12/1511:30 am -
1 stop32h 15m
Deal found 10/25![Multiple Airlines logo]()
$991
This Gotogate deal was found by Cheapflights users on 10/29. 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.
Sun 11/293:40 pm -
1 stop15h 10m
Tue 12/87:30 pm -
1 stop24h 15m
Deal found 10/29![Lufthansa logo]()
$973
This Virgin Atlantic deal was found by Cheapflights users on 10/25. 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.
Sun 11/2910:20 am -
1 stop15h 25m
Tue 12/810:00 am -
2 stops16h 32m
Deal found 10/25![Virgin Atlantic logo]()
$985
This SmartFares deal was found by Cheapflights users on 10/26. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/304:05 pm -
1 stop10h 25m
Wed 12/96:30 am -
1 stop13h 15m
Deal found 10/26![Multiple Airlines logo]()
$942
This FlightHub deal was found by Cheapflights users on 10/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/302:31 pm -
2 stops21h 09m
Sun 12/66:40 am -
2 stops23h 25m
Deal found 10/29![Scandinavian Airlines logo]()
$965
This Scandinavian Airlines deal was found by Cheapflights users on 10/26. 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.
Mon 11/302:31 pm -
2 stops21h 09m
Wed 12/96:40 am -
2 stops23h 25m
Deal found 10/26![Scandinavian Airlines logo]()
$971
One-way flights from St. Louis to HeathrowSearch for one-way flight options from St. Louis to Heathrow. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
Search for one-way flight options from St. Louis to Heathrow. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Fri 12/254:21 pm -
3 stops38h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$411
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 1/263:54 pm -
3 stops38h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$425
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Fri 12/117:54 pm -
3 stops39h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Multiple Airlines logo]()
$430
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 1/66:20 pm -
3 stops42h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$450
This Cheapflightsfares deal was found by Cheapflights users on 10/26. 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 11/86:02 am -
2 stops23h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Aer Lingus logo]()
$452
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 12/32:02 pm -
3 stops40h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Multiple Airlines logo]()
$454
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 12/156:20 pm -
2 stops34h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$464
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 1/59:15 am -
2 stops22h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Aer Lingus logo]()
$466
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 11/81:28 pm -
3 stops41h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Multiple Airlines logo]()
$477
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 12/236:21 pm -
3 stops33h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Multiple Airlines logo]()
$496
This Cheapflightsfares deal was found by Cheapflights users on 10/25. 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 11/147:26 am -
2 stops19h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Aer Lingus logo]()
$499
Find flight deals from St. Louis to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Heathrow (LHR). 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 October 30, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $808 (Air Canada) |
One-way from | $411 (Kiwi.com) |
Popular in | June |
Cheapest in | April |
Average price | $945 |
Good round-trip deal | $1,035 or less |
Good one-way deal | $400 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Heathrow 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 October 30, 2026.
Use the filters below to find and compare flights from St. Louis to London Heathrow Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Mon 4/19
2:12 pm-6:55 am
1 stop10h 43m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$349
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Wed 4/14
5:21 pm-10:30 am
1 stop11h 09m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$349
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Mon 3/1
9:00 am-7:50 am
1 stop16h 50m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$354
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Wed 4/14
5:21 pm-10:30 am
1 stop11h 09m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$359
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Mon 3/1
9:20 am-6:20 am
2 stops15h 00m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$359
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Wed 4/14
9:00 am-7:10 am
2 stops16h 10m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$359
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Wed 3/3
11:51 am-6:30 pm
2 stops24h 39m
London Heathrow
Mon 3/8
6:40 am-11:39 pm
2 stops22h 59m
$988
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Tue 2/2
10:48 am-7:10 am
2 stops14h 22m
London Heathrow
Sat 2/6
9:00 am-7:28 pm
2 stops16h 28m
$988
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Mon 3/1
10:55 am-6:40 am
2 stops13h 45m
London Heathrow
Sat 3/6
6:50 am-4:12 pm
2 stops15h 22m
$991
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Wed 12/2
7:03 am-6:25 am
1 stop17h 22m
London Heathrow
Fri 12/11
10:00 am-9:38 pm
2 stops17h 38m
$994
Showing 1-10 of 16 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Heathrow
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 St. Louis to Heathrow in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on St. Louis-London Heathrow Airport flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on St. Louis-London Heathrow Airport flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from St. Louis-London Heathrow Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-London Heathrow Airport flights, Cheapflights users trust Ovago the most. Ovago 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 St. Louis-London Heathrow Airport 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 St. Louis to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow from St. Louis with our price prediction graph.
STL-LHR
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 St. Louis to London Heathrow Airport
Prices
Delays
How far ahead should I book a flight from St. Louis to London Heathrow Airport?
To ensure you get the cheapest price possible for a flight from St. Louis to London Heathrow Airport, you should look to book at least 5 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from St. Louis to London Heathrow Airport?
Currently, April is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of $802). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of $1,544). 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 STL to LHR?
Find hourly flight availability from St. Louis to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2026.
When flying from St. Louis to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
How often are flights from St. Louis to London delayed?
About 18% of weekly flights between St. Louis and London have experienced delays in the past year, with the average delay time being 114 minutes.
What is the most punctual flight time for St. Louis to London flights?
Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Monday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on St. Louis to London flights?
Over the last year, British Airways have had the lowest number of delays on this route, with just 18% of flights being delayed.
Reviews of airlines servicing Heathrow
Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated October 30, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andAir Canada from St. Louis to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Heathrow. 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 London Heathrow Airport?
Book flights to London Heathrow Airport if you plan to visit one of these locationsIlford
Dorking
Gatwick
Hounslow
Wembley
Harrow
Southend-on-Sea
Basingstoke
Watford
Northampton
Dartford
Winchester
Croydon
Kingston upon Thames
Chipping Norton
Slough
Eastbourne
Stansted
Sutton
Luton
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Other flights to Heathrow
Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 30, 2026.
St. Louis and Heathrow flights
Browse other St. Louis and Heathrow flight options. Last updated on October 30, 2026.
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Top 8 airlines flying from St. Louis to Heathrow
Discover the top 8 airlines that operate flights from St. Louis to Heathrow. 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 October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$483 | Average$1,092 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$615 | Average$1,139 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$619 | Average$1,260 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$646 | Average$1,071 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$649 | Average$1,035 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$665 | Average$1,173 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$671 | Average$985 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$804 | Average$995 | FlexibilityNo cancel fee | On-time67% |