$338+ 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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LHR
Nov 12 — Nov 191
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 13, 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 13, 2026.
This Mytrip deal was found by Cheapflights users on 10/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/212:02 pm -
3 stops25h 28m
Tue 12/812:15 pm -
3 stops29h 02m
Deal found 10/12![Multiple Airlines logo]()
$936
This Expedia deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/182:21 pm -
1 stop11h 24m
Wed 12/28:25 pm -
2 stops25h 59m
Deal found 10/11![Virgin Atlantic logo]()
$948
This Gotogate deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:05 pm -
1 stop10h 25m
Wed 11/256:30 am -
1 stop13h 15m
Deal found 10/9![Multiple Airlines logo]()
$951
This Mytrip deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/94:26 pm -
2 stops19h 04m
Mon 11/168:15 am -
2 stops21h 01m
Deal found 10/11![Multiple Airlines logo]()
$960
This Justfly.com deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/412:36 pm -
2 stops21h 24m
Fri 12/116:40 am -
2 stops23h 25m
Deal found 10/10![Scandinavian Airlines logo]()
$963
This Gotogate deal was found by Cheapflights users on 10/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:05 pm -
1 stop10h 25m
Fri 12/116:30 am -
1 stop13h 15m
Deal found 10/12![Multiple Airlines logo]()
$972
This Trip.com deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/184:05 pm -
1 stop10h 25m
Wed 12/26:00 pm -
1 stop27h 26m
Deal found 10/11![Air Canada logo]()
$973
This Cheapflightsfares deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/22:25 pm -
2 stops25h 15m
Wed 11/186:40 am -
2 stops23h 16m
Deal found 10/11![Scandinavian Airlines logo]()
$976
This Cheapflightsfares deal was found by Cheapflights users on 10/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/113:40 pm -
1 stop15h 10m
Wed 11/186:30 am -
1 stop13h 15m
Deal found 10/12![Lufthansa logo]()
$977
This Orbitz deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1112:58 pm -
1 stop11h 52m
Tue 11/177:30 am -
2 stops16h 47m
Deal found 10/10![Iberia logo]()
$980
This United Airlines deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/111:08 pm -
1 stop10h 47m
Fri 11/209:00 am -
2 stops18h 40m
Deal found 10/11![United Airlines logo]()
$982
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 13, 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 13, 2026.
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/116:45 pm -
1 stop11h 15m
Wed 1/136:50 am -
2 stops17h 00m
Deal found 10/9![United Airlines logo]()
$801
This Delta deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/149:00 am -
2 stops16h 45m
Fri 1/226:30 am -
2 stops16h 20m
Deal found 10/8![Delta logo]()
$979
This British Airways deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/149:58 am -
1 stop14h 17m
Fri 1/2212:35 pm -
1 stop12h 52m
Deal found 10/8![British Airways logo]()
$1,007
This Icelandair deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/88:25 am -
2 stops20h 25m
Mon 12/148:35 pm -
2 stops31h 20m
Deal found 10/8![Multiple Airlines logo]()
$1,008
This Scandinavian Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/262:25 pm -
2 stops20h 35m
Mon 11/27:05 am -
3 stops22h 49m
Deal found 10/8![Scandinavian Airlines logo]()
$1,018
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/281:08 pm -
2 stops14h 02m
Wed 3/109:00 am -
2 stops16h 29m
Deal found 10/9![United Airlines logo]()
$927
This Delta deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/22:17 pm -
2 stops14h 13m
Fri 12/116:30 am -
2 stops16h 50m
Deal found 10/10![Delta logo]()
$987
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1511:25 am -
2 stops14h 15m
Wed 3/176:50 am -
2 stops15h 16m
Deal found 10/8![United Airlines logo]()
$929
This United Airlines deal was found by Cheapflights users on 10/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/143:21 pm -
1 stop10h 34m
Sat 2/209:00 am -
2 stops16h 24m
Deal found 10/12![United Airlines logo]()
$973
This United Airlines deal was found by Cheapflights users on 10/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/24:30 pm -
1 stop13h 55m
Mon 4/55:50 pm -
2 stops27h 48m
Deal found 10/12![United Airlines logo]()
$991
This United Airlines deal was found by Cheapflights users on 10/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/234:39 pm -
1 stop35h 01m
Tue 12/156:00 pm -
1 stop27h 26m
Deal found 10/12![United Airlines logo]()
$998
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/81:08 pm -
1 stop12h 47m
Sun 11/156:50 am -
2 stops14h 53m
Deal found 10/8![United Airlines logo]()
$1,034
Last-minute flights from St. Louis to HeathrowDiscover last-minute flight deals from St. Louis to Heathrow. Data last updated October 13, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Heathrow. Data last updated October 13, 2026 and is based on user searches.
This Justfly.com deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/262:25 pm -
2 stops22h 15m
Fri 10/306:40 am -
2 stops22h 14m
Deal found 10/11![Scandinavian Airlines logo]()
$963
This Cheapflightsfares deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/22:25 pm -
2 stops25h 15m
Wed 11/186:40 am -
2 stops23h 16m
Deal found 10/11![Scandinavian Airlines logo]()
$976
This Mytrip deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/94:26 pm -
2 stops19h 04m
Mon 11/168:15 am -
2 stops21h 01m
Deal found 10/11![Multiple Airlines logo]()
$960
This Cheapflightsfares deal was found by Cheapflights users on 10/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/113:40 pm -
1 stop15h 10m
Wed 11/186:30 am -
1 stop13h 15m
Deal found 10/12![Lufthansa logo]()
$977
This Orbitz deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1112:58 pm -
1 stop11h 52m
Tue 11/177:30 am -
2 stops16h 47m
Deal found 10/10![Iberia logo]()
$980
This United Airlines deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/111:08 pm -
1 stop10h 47m
Fri 11/209:00 am -
2 stops18h 40m
Deal found 10/11![United Airlines logo]()
$982
This Gotogate deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:05 pm -
1 stop10h 25m
Wed 11/256:30 am -
1 stop13h 15m
Deal found 10/9![Multiple Airlines logo]()
$951
This Gotogate deal was found by Cheapflights users on 10/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:05 pm -
1 stop10h 25m
Fri 12/116:30 am -
1 stop13h 15m
Deal found 10/12![Multiple Airlines logo]()
$972
This Delta deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/167:13 am -
1 stop17h 12m
Wed 11/256:30 am -
2 stops16h 44m
Deal found 10/9![Delta logo]()
$983
This Expedia deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/182:21 pm -
1 stop11h 24m
Wed 12/28:25 pm -
2 stops25h 59m
Deal found 10/11![Virgin Atlantic logo]()
$948
This Trip.com deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/184:05 pm -
1 stop10h 25m
Wed 12/26:00 pm -
1 stop27h 26m
Deal found 10/11![Air Canada logo]()
$973
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 13, 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 13, 2026.
This Orbitz deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/104:05 pm -
1 stop10h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Air Canada logo]()
$338
This Mytrip deal was found by Cheapflights users on 10/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/14:05 pm -
1 stop10h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![Multiple Airlines logo]()
$342
This Cheapflightsfares deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/79:35 pm -
Nonstop8h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![British Airways logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/137:02 pm -
3 stops35h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![Multiple Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/128:52 am -
2 stops18h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/9![United Airlines logo]()
$350
This Expedia deal was found by Cheapflights users on 10/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/126:45 pm -
2 stops18h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![Lufthansa logo]()
$351
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/76:30 am -
2 stops18h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![United Airlines logo]()
$353
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/16:00 am -
2 stops18h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![United Airlines logo]()
$354
This Air Canada deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/104:05 pm -
1 stop22h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Air Canada logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 10/12. 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.
Mon 1/117:02 pm -
3 stops35h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![Multiple Airlines logo]()
$376
This Kiwi.com deal was found by Cheapflights users on 10/12. 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.
Wed 11/116:34 pm -
3 stops34h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![Multiple Airlines logo]()
$382
This Kiwi.com deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:34 pm -
3 stops40h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Multiple Airlines logo]()
$387
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 13, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $779 (Expedia) |
One-way from | $338 (Orbitz) |
Popular in | June |
Cheapest in | April |
Average price | $904 |
Good round-trip deal | $1,035 or less |
Good one-way deal | $476 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 13, 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
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Tue 1/12
8:52 am-9:20 am
2 stops18h 28m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$350
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Sun 1/10
8:52 am-9:20 am
2 stops18h 28m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$350
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Mon 3/1
6:00 am-6:20 am
2 stops18h 20m
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
Mon 4/5
9:23 am-6:55 am
2 stops15h 32m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$354
Quickest round-trip
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Fri 4/9
9:35 pm-11:35 am
Nonstop8h 00m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$400
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Fri 1/15
10:00 am-7:55 am
2 stops15h 55m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$404
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Fri 4/9
6:45 am-6:20 am
2 stops17h 35m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$404
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Sat 1/9
11:51 am-6:25 am
1 stop12h 34m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$404
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Mon 1/11
6:45 pm-12:00 pm
1 stop11h 15m
London Heathrow
Wed 1/13
6:50 am-5:50 pm
2 stops17h 00m
$801
St. LouisLondon
STL Lambert-St Louis - LHR London Heathrow
STLLHR
Lambert-St Louis
Sun 2/28
1:08 pm-9:10 am
2 stops14h 02m
London Heathrow
Wed 3/10
9:00 am-7:29 pm
2 stops16h 29m
$927
Showing 1-10 of 20 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 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 $779). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of $1,539). 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 13, 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 13, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andAmerican Airlines 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
Overall
7.8
Entertainment
7.8
Crew
8.5
Food
7.2
Comfort
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Boarding
8.1
Overall
7.8
Entertainment
7.8
Crew
8.5
Food
7.2
Comfort
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Boarding
8.1
Overall
7.8
Entertainment
7.8
Crew
8.5
Food
7.2
Comfort
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Boarding
8.1
Overall
7.8
Entertainment
7.8
Crew
8.5
Food
7.2
Comfort
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Boarding
8.1
Overall
7.8
Entertainment
7.8
Crew
8.5
Food
7.2
Comfort
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Boarding
8.1
Overall
7.8
Entertainment
7.8
Crew
8.5
Food
7.2
Comfort
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
Chipping Norton
Kingston upon Thames
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 13, 2026.
St. Louis and Heathrow flights
Browse other St. Louis and Heathrow flight options. Last updated on October 13, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on October 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$483 | Average$1,086 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$596 | Average$1,087 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$615 | Average$1,139 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$619 | Average$1,264 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$649 | Average$917 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$649 | Average$989 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$655 | Average$1,146 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$804 | Average$995 | FlexibilityNo cancel fee | On-time67% |