$325+ Cheap flights from St. Louis (STL) to Heathrow (LHR)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LHR
Jul 10 — Jul 171
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 October or November, booked 50 days in advance, depart on a Thursday or Monday and return on a Monday
Cheap flight deals from St. Louis to Heathrow
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Best
Last-minute
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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 June 10, 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 June 10, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 6/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/22:31 pm
STL
- LHR
1 stop11h 34m
British Airways
Sun 8/162:25 pm
LHR
- STL
1 stop14h 16m
British Airways
Deal found 6/5![British Airways logo]()
$1,064
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:01 am
STL
- LHR
1 stop33h 19m
United Airlines
Sat 8/155:40 pm
LHR
- STL
1 stop26h 22m
United Airlines
Deal found 6/8![United Airlines logo]()
$1,066
This Cheapflightsfares deal was found by Cheapflights users on 6/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/119:35 pm
STL
- LHR
Nonstop8h 00m
British Airways
Fri 8/214:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Deal found 6/5![British Airways logo]()
$1,067
This KAYAK deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/143:30 pm
STL
- LHR
1 stop17h 10m
Lufthansa
Sun 9/276:30 am
LHR
- STL
2 stops20h 51m
Lufthansa
Deal found 6/7![Lufthansa logo]()
$1,068
This Delta deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/302:10 pm
STL
- LHR
1 stop11h 00m
Delta
Sat 9/1210:45 am
LHR
- STL
1 stop15h 46m
Delta
Deal found 6/7![Delta logo]()
$1,070
This United Airlines deal was found by Cheapflights users on 6/5. 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.
Sat 8/294:50 pm
STL
- LHR
1 stop21h 50m
United Airlines
Mon 9/77:45 am
LHR
- STL
1 stop14h 21m
United Airlines
Deal found 6/5![United Airlines logo]()
$1,071
This deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/912:10 pm
STL
- LHR
1 stop12h 20m
Air Canada
Sun 8/169:30 am
LHR
- STL
1 stop15h 12m
Air Canada
Deal found 6/8![Air Canada logo]()
$1,072
This deal was found by Cheapflights users on 6/5. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1212:10 pm
STL
- LHR
1 stop12h 20m
Air Canada
Sun 8/169:30 am
LHR
- STL
1 stop15h 12m
Air Canada
Deal found 6/5![Air Canada logo]()
$1,073
This KAYAK deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/303:30 pm
STL
- LHR
1 stop13h 10m
Lufthansa
Mon 9/78:30 am
LHR
- STL
2 stops20h 29m
Lufthansa
Deal found 6/7![Lufthansa logo]()
$1,074
This Orbitz deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/212:50 pm
STL
- LHR
1 stop10h 10m
Multiple Airlines
Sat 11/2811:10 am
LHR
- STL
2 stops17h 44m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$1,075
This British Airways deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/269:35 pm
STL
- LHR
Nonstop8h 00m
British Airways
Wed 9/24:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Deal found 6/7![British Airways logo]()
$1,076
This KAYAK deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/311:13 pm
STL
- LHR
2 stops17h 27m
Lufthansa
Thu 8/131:30 pm
LHR
- STL
2 stops15h 29m
Lufthansa
Deal found 6/9![Lufthansa logo]()
$1,077
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 June 10, 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 June 10, 2026.
This British Airways deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/23:22 pm
STL
- LHR
1 stop11h 13m
British Airways
Fri 12/411:55 am
LHR
- STL
1 stop16h 30m
British Airways
Deal found 6/9![British Airways logo]()
$1,114
This Finnair deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/174:32 pm
STL
- LHR
1 stop33h 08m
Finnair
Thu 10/225:05 pm
LHR
- STL
2 stops36h 20m
Finnair
Deal found 6/7![Finnair logo]()
$1,136
This Scandinavian Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1712:52 pm
STL
- LHR
2 stops23h 38m
Scandinavian Airlines
Mon 8/247:05 am
LHR
- STL
3 stops22h 53m
Scandinavian Airlines
Deal found 6/6![Scandinavian Airlines logo]()
$1,199
This Delta deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:58 pm
STL
- LHR
1 stop12h 17m
Delta
Wed 8/58:40 am
LHR
- STL
2 stops18h 02m
Delta
Deal found 6/7![Delta logo]()
$1,212
This United Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:01 am
STL
- LHR
1 stop22h 24m
United Airlines
Tue 8/45:40 pm
LHR
- STL
1 stop26h 22m
United Airlines
Deal found 6/7![United Airlines logo]()
$1,226
This Cheapflightsfares deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/19:09 am
STL
- LHR
2 stops17h 56m
Aer Lingus
Wed 7/88:50 am
LHR
- STL
2 stops21h 26m
Aer Lingus
Deal found 6/9![Aer Lingus logo]()
$1,365
This British Airways deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:22 am
STL
- LHR
1 stop14h 33m
British Airways
Tue 9/84:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Deal found 6/8![British Airways logo]()
$1,225
This United Airlines deal was found by Cheapflights users on 6/5. 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 7/56:01 am
STL
- LHR
2 stops18h 29m
United Airlines
Tue 7/2110:50 am
LHR
- STL
2 stops16h 36m
United Airlines
Deal found 6/5![United Airlines logo]()
$1,270
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2110:51 am
STL
- LHR
2 stops14h 19m
Delta
Mon 7/276:30 am
LHR
- STL
2 stops16h 54m
Delta
Deal found 6/9![Delta logo]()
$1,285
This Scandinavian Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/273:39 pm
STL
- LHR
2 stops24h 01m
Scandinavian Airlines
Mon 8/317:05 am
LHR
- STL
3 stops22h 53m
Scandinavian Airlines
Deal found 6/7![Scandinavian Airlines logo]()
$1,339
This United Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/3112:10 pm
STL
- LHR
1 stop12h 20m
United Airlines
Tue 8/49:30 am
LHR
- STL
1 stop15h 12m
United Airlines
Deal found 6/7![United Airlines logo]()
$1,282
This United Airlines deal was found by Cheapflights users on 6/5. 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.
Fri 7/31:13 pm
STL
- LHR
2 stops14h 47m
United Airlines
Fri 7/106:50 am
LHR
- STL
2 stops14h 56m
United Airlines
Deal found 6/5![United Airlines logo]()
$1,330
Last-minute flights from St. Louis to HeathrowDiscover last-minute flight deals from St. Louis to Heathrow. Data last updated June 10, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Heathrow. Data last updated June 10, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/1312:10 pm
STL
- LHR
2 stops19h 45m
Multiple Airlines
Wed 7/229:10 pm
LHR
- STL
2 stops27h 32m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$1,130
This FlightHub deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/142:40 pm
STL
- LHR
1 stop11h 55m
Multiple Airlines
Thu 7/236:30 pm
LHR
- STL
1 stop24h 55m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$1,154
This Lufthansa deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/213:30 pm
STL
- LHR
1 stop13h 10m
Lufthansa
Tue 8/46:30 am
LHR
- STL
1 stop12h 55m
Lufthansa
Deal found 6/8![Lufthansa logo]()
$1,137
This Lufthansa deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/273:30 pm
STL
- LHR
1 stop13h 10m
Lufthansa
Wed 8/56:30 am
LHR
- STL
1 stop12h 55m
Lufthansa
Deal found 6/8![Lufthansa logo]()
$1,141
This oojo deal was found by Cheapflights users on 6/5. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/283:30 pm
STL
- LHR
1 stop13h 10m
Lufthansa
Tue 8/46:30 am
LHR
- STL
1 stop12h 55m
Lufthansa
Deal found 6/5![Lufthansa logo]()
$1,122
This FlightHub deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/282:40 pm
STL
- LHR
1 stop11h 55m
Multiple Airlines
Wed 8/56:30 am
LHR
- STL
1 stop12h 55m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$1,127
This KAYAK deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/311:13 pm
STL
- LHR
2 stops17h 27m
Lufthansa
Thu 8/131:30 pm
LHR
- STL
2 stops15h 29m
Lufthansa
Deal found 6/9![Lufthansa logo]()
$1,077
This KAYAK deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/317:05 pm
STL
- LHR
2 stops15h 35m
Lufthansa
Tue 8/1111:30 am
LHR
- STL
1 stop31h 55m
Lufthansa
Deal found 6/9![Lufthansa logo]()
$1,087
This United Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/3112:10 pm
STL
- LHR
1 stop12h 20m
United Airlines
Sun 8/169:30 am
LHR
- STL
1 stop15h 12m
United Airlines
Deal found 6/9![United Airlines logo]()
$1,121
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/311:54 pm
STL
- LHR
1 stop11h 16m
Delta
Sat 8/1510:45 am
LHR
- STL
1 stop12h 29m
Delta
Deal found 6/9![Delta logo]()
$1,129
This KAYAK deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/311:13 pm
STL
- LHR
2 stops15h 27m
Lufthansa
Sun 8/167:30 pm
LHR
- STL
1 stop23h 55m
Lufthansa
Deal found 6/9![Lufthansa logo]()
$1,147
This Justfly.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/316:55 am
STL
- LHR
2 stops20h 10m
Aer Lingus
Wed 8/128:50 am
LHR
- STL
2 stops21h 09m
Aer Lingus
Deal found 6/8![Aer Lingus logo]()
$1,162
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 June 10, 2026.
Search for one-way flight options from St. Louis to Heathrow. Find affordable one-way fares based on user searches. Data last updated June 10, 2026.
This British Airways deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/189:40 pm
STL
- LHR
Nonstop8h 00m
British Airways
Deal found 6/9![British Airways logo]()
$325
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/211:51 am
STL
- LHR
2 stops14h 14m
Delta
Deal found 6/8![Delta logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:34 pm
STL
- LHR
3 stops35h 21m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$331
This oojo deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:53 pm
STL
- LHR
1 stop30h 27m
British Airways
Deal found 6/8![British Airways logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 6/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/294:57 pm
STL
- LHR
3 stops36h 58m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$338
This Delta deal was found by Cheapflights users on 6/5. 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.
Sat 12/54:13 pm
STL
- LHR
1 stop21h 47m
Delta
Deal found 6/5![Delta logo]()
$340
This Kiwi.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/244:57 pm
STL
- LHR
3 stops36h 58m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 6/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:34 pm
STL
- LHR
3 stops43h 46m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/194:09 pm
STL
- LHR
2 stops22h 11m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$348
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 June 10, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $1,064 (Cheapflightsfares) |
One-way from | $325 (British Airways) |
Popular in | June |
Cheapest in | October |
Average price | $1,445 |
Good round-trip deal | $1,077 or less |
Good one-way deal | $324 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 2,558,603 searches. Data last updated June 10, 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 - LHR
STLLHR
Lambert-St Louis
Wed 12/2
3:22 pm-8:35 am
1 stop11h 13m
London Heathrow
Fri 12/4
11:55 am-10:25 pm
1 stop16h 30m
$1,114
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Sat 10/17
4:32 pm-7:40 am
1 stop33h 08m
London Heathrow
Thu 10/22
5:05 pm-11:25 pm
2 stops36h 20m
$1,136
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Mon 8/17
12:52 pm-6:30 pm
2 stops23h 38m
London Heathrow
Mon 8/24
7:05 am-11:58 pm
3 stops22h 53m
$1,199
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Tue 7/28
6:58 pm-1:15 pm
1 stop12h 17m
London Heathrow
Wed 8/5
8:40 am-8:42 pm
2 stops18h 02m
$1,212
Quickest round-trip
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Tue 9/1
10:22 am-6:55 am
1 stop14h 33m
London Heathrow
Tue 9/8
4:25 pm-7:30 pm
Nonstop9h 05m
$1,225
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Tue 7/28
6:01 am-10:25 am
1 stop22h 24m
London Heathrow
Tue 8/4
5:40 pm-2:02 pm
1 stop26h 22m
$1,226
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Sun 7/5
6:01 am-6:30 am
2 stops18h 29m
London Heathrow
Tue 7/21
10:50 am-9:26 pm
2 stops16h 36m
$1,270
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Fri 7/31
12:10 pm-6:30 am
1 stop12h 20m
London Heathrow
Tue 8/4
9:30 am-6:42 pm
1 stop15h 12m
$1,282
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Tue 7/21
10:51 am-7:10 am
2 stops14h 19m
London Heathrow
Mon 7/27
6:30 am-5:24 pm
2 stops16h 54m
$1,285
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Fri 7/3
1:13 pm-10:00 am
2 stops14h 47m
London Heathrow
Fri 7/10
6:50 am-3:46 pm
2 stops14h 56m
$1,330
Showing 1-10 of 22 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 June.
| 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 49 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, October is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of $652). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of $1,445). 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 June 10, 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 27% of weekly flights between St. Louis and London have experienced delays in the past year, with the average delay time being 162 minutes.
What is the most punctual flight time for St. Louis to London flights?
Historically, flights departing at night 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?
Wednesday 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 St. Louis to London flights?
Over the last year, British Airways have had the lowest number of delays on this route, with just 27% 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 June 10, 2026.
Get a feel of what it's like to fly with United Airlines,American 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.
Comfort
7.3
Food
6.6
Crew
8.1
Entertainment
7.1
Overall
7.4
Boarding
7.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Comfort
7.3
Food
6.6
Crew
8.1
Entertainment
7.1
Overall
7.4
Boarding
7.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Comfort
7.3
Food
6.6
Crew
8.1
Entertainment
7.1
Overall
7.4
Boarding
7.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Comfort
7.3
Food
6.6
Crew
8.1
Entertainment
7.1
Overall
7.4
Boarding
7.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Comfort
7.3
Food
6.6
Crew
8.1
Entertainment
7.1
Overall
7.4
Boarding
7.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Comfort
7.3
Food
6.6
Crew
8.1
Entertainment
7.1
Overall
7.4
Boarding
7.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
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
Hounslow
Winchester
Croydon
Gatwick
Southend-on-Sea
Wembley
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Northampton
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough
Browse thousands of different options on Cheapflights for your next trip
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Complete your trip
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Find flights from St. Louis to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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 June 10, 2026.
St. Louis and Heathrow flights
Browse other St. Louis and Heathrow flight options. Last updated on June 10, 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 June 10, 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 2,558,603 searches. Data last updated June 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$483 | Average$852 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$529 | Average$683 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$563 | Average$869 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$572 | Average$854 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$575 | Average$892 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$577 | Average$765 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$580 | Average$824 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$635 | Average$962 | FlexibilityNo cancel fee | On-time76% |