$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 7/27. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LHR
May 29 — Jun 51
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 Tuesday 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 April 29, 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 April 29, 2026.
This Expedia deal was found by Cheapflights users on 4/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/209:35 pm
STL
- LHR
Nonstop8h 00m
Iberia
Tue 10/277:30 am
LHR
- STL
2 stops17h 38m
Iberia
Deal found 4/27![Iberia logo]()
$858
This Orbitz deal was found by Cheapflights users on 4/26. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/209:40 pm
STL
- LHR
Nonstop8h 00m
Iberia
Mon 9/287:25 pm
LHR
- STL
2 stops30h 38m
Iberia
Deal found 4/26![Iberia logo]()
$862
This The Travel House deal was found by Cheapflights users on 4/28. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/23:42 pm
STL
- LHR
2 stops19h 58m
Scandinavian Airlines
Wed 11/116:40 am
LHR
- STL
2 stops22h 59m
Scandinavian Airlines
Deal found 4/28![Scandinavian Airlines logo]()
$865
This oojo deal was found by Cheapflights users on 4/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/79:35 pm
STL
- LHR
Nonstop8h 00m
British Airways
Thu 10/157:50 am
LHR
- STL
2 stops18h 18m
British Airways
Deal found 4/26![British Airways logo]()
$866
This Delta deal was found by Cheapflights users on 4/28. 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.
Tue 10/61:30 pm
STL
- LHR
1 stop17h 45m
Delta
Wed 10/146:30 am
LHR
- STL
2 stops16h 36m
Delta
Deal found 4/28![Delta logo]()
$868
This Cheapflightsfares deal was found by Cheapflights users on 4/28. 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 10/69:35 pm
STL
- LHR
Nonstop8h 00m
British Airways
Fri 10/164:25 pm
LHR
- STL
Nonstop9h 05m
British Airways
Deal found 4/28![British Airways logo]()
$869
This Expedia deal was found by Cheapflights users on 4/24. 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 8/259:35 pm
STL
- LHR
Nonstop8h 00m
Multiple Airlines
Tue 9/16:30 am
LHR
- STL
1 stop12h 55m
Multiple Airlines
Deal found 4/24![Multiple Airlines logo]()
$870
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 April 29, 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 April 29, 2026.
This Delta deal was found by Cheapflights users on 4/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/511:42 am
STL
- LHR
1 stop13h 33m
Delta
Tue 5/196:30 am
LHR
- STL
2 stops15h 40m
Delta
Deal found 4/27![Delta logo]()
$1,206
This Finnair deal was found by Cheapflights users on 4/28. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/39:40 pm
STL
- LHR
Nonstop8h 00m
Finnair
Tue 5/124:25 pm
LHR
- STL
Nonstop9h 05m
Finnair
Deal found 4/28![Finnair logo]()
$1,223
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/211:05 pm
STL
- LHR
1 stop14h 55m
United Airlines
Thu 5/282:05 pm
LHR
- STL
1 stop12h 20m
United Airlines
Deal found 4/27![United Airlines logo]()
$1,333
This British Airways deal was found by Cheapflights users on 4/25. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/29:35 pm
STL
- LHR
Nonstop8h 00m
British Airways
Sun 6/712:55 pm
LHR
- STL
1 stop14h 42m
British Airways
Deal found 4/25![British Airways logo]()
$1,387
This Finnair deal was found by Cheapflights users on 4/25. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/159:35 pm
STL
- LHR
Nonstop8h 00m
Finnair
Fri 7/243:15 pm
LHR
- STL
1 stop14h 41m
Finnair
Deal found 4/25![Finnair logo]()
$1,327
This Delta deal was found by Cheapflights users on 4/28. 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 6/115:36 pm
STL
- LHR
2 stops14h 09m
Delta
Tue 6/166:30 am
LHR
- STL
2 stops16h 53m
Delta
Deal found 4/28![Delta logo]()
$1,378
This United Airlines deal was found by Cheapflights users on 4/24. 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 7/178:35 pm
STL
- LHR
1 stop28h 10m
United Airlines
Sun 7/265:40 pm
LHR
- STL
1 stop32h 27m
United Airlines
Deal found 4/24![United Airlines logo]()
$1,397
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/166:30 pm
STL
- LHR
1 stop31h 25m
United Airlines
Sat 7/255:40 pm
LHR
- STL
1 stop32h 27m
United Airlines
Deal found 4/27![United Airlines logo]()
$1,448
This Delta deal was found by Cheapflights users on 4/29. 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 6/175:36 pm
STL
- LHR
2 stops14h 09m
Delta
Tue 6/306:30 am
LHR
- STL
2 stops16h 53m
Delta
Deal found 4/29![Delta logo]()
$1,519
This Delta deal was found by Cheapflights users on 4/26. 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.
Mon 6/89:21 am
STL
- LHR
2 stops15h 49m
Delta
Mon 6/226:30 am
LHR
- STL
2 stops16h 16m
Delta
Deal found 4/26![Delta logo]()
$1,589
This United Airlines deal was found by Cheapflights users on 4/25. 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.
Sat 6/277:23 pm
STL
- LHR
1 stop30h 02m
United Airlines
Sun 7/55:40 pm
LHR
- STL
1 stop32h 27m
United Airlines
Deal found 4/25![United Airlines logo]()
$1,602
Last-minute flights from St. Louis to HeathrowDiscover last-minute flight deals from St. Louis to Heathrow. Data last updated April 29, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Heathrow. Data last updated April 29, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 4/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/211:42 am
STL
- LHR
2 stops22h 18m
Scandinavian Airlines
Fri 5/87:30 pm
LHR
- STL
2 stops32h 08m
Scandinavian Airlines
Deal found 4/25![Scandinavian Airlines logo]()
$1,103
This FlightHub deal was found by Cheapflights users on 4/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/312:27 pm
STL
- LHR
2 stops16h 43m
Aer Lingus
Thu 5/712:00 pm
LHR
- STL
2 stops16h 19m
Aer Lingus
Deal found 4/25![Aer Lingus logo]()
$1,078
This KAYAK deal was found by Cheapflights users on 4/27. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/45:21 pm
STL
- LHR
2 stops14h 09m
Aer Lingus
Tue 5/127:40 am
LHR
- STL
2 stops17h 53m
Aer Lingus
Deal found 4/27![Aer Lingus logo]()
$1,082
This BusinessClass deal was found by Cheapflights users on 4/27. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/45:21 pm
STL
- LHR
2 stops14h 09m
Aer Lingus
Fri 5/81:25 pm
LHR
- STL
2 stops14h 54m
Aer Lingus
Deal found 4/27![Aer Lingus logo]()
$1,085
This Justfly.com deal was found by Cheapflights users on 4/28. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/55:21 pm
STL
- LHR
2 stops19h 34m
Aer Lingus
Tue 5/1912:00 pm
LHR
- STL
2 stops17h 56m
Aer Lingus
Deal found 4/28![Aer Lingus logo]()
$1,049
This Justfly.com deal was found by Cheapflights users on 4/26. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/55:21 pm
STL
- LHR
2 stops20h 59m
Aer Lingus
Thu 8/137:40 am
LHR
- STL
2 stops22h 11m
Aer Lingus
Deal found 4/26![Aer Lingus logo]()
$1,093
This Ovago deal was found by Cheapflights users on 4/25. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/612:27 pm
STL
- LHR
2 stops13h 38m
Aer Lingus
Wed 5/139:50 am
LHR
- STL
2 stops18h 29m
Aer Lingus
Deal found 4/25![Aer Lingus logo]()
$1,083
This Mytrip deal was found by Cheapflights users on 4/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/217:05 am
STL
- LHR
3 stops31h 55m
Air Canada
Wed 5/272:10 pm
LHR
- STL
2 stops27h 56m
Air Canada
Deal found 4/27![Air Canada logo]()
$1,072
This Mytrip deal was found by Cheapflights users on 4/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:05 am
STL
- LHR
2 stops31h 55m
Air Canada
Tue 6/26:00 am
LHR
- STL
3 stops20h 25m
Air Canada
Deal found 4/26![Air Canada logo]()
$1,117
This Mytrip deal was found by Cheapflights users on 4/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/317:05 am
STL
- LHR
2 stops31h 55m
Air Canada
Sun 6/76:00 am
LHR
- STL
3 stops20h 25m
Air Canada
Deal found 4/28![Air Canada logo]()
$1,104
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 April 29, 2026.
Search for one-way flight options from St. Louis to Heathrow. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 4/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/276:12 pm
STL
- LHR
1 stop11h 58m
British Airways
Deal found 4/27![British Airways logo]()
$325
This Delta deal was found by Cheapflights users on 4/29. 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.
Tue 7/2810:51 am
STL
- LHR
2 stops14h 19m
Delta
Deal found 4/29![Delta logo]()
$329
This British Airways deal was found by Cheapflights users on 4/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/289:35 pm
STL
- LHR
Nonstop8h 00m
British Airways
Deal found 4/29![British Airways logo]()
$384
This Ovago deal was found by Cheapflights users on 4/27. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/612:27 pm
STL
- LHR
2 stops13h 38m
Aer Lingus
Deal found 4/27![Aer Lingus logo]()
$449
This KAYAK deal was found by Cheapflights users on 4/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/54:30 pm
STL
- LHR
2 stops33h 35m
Aer Lingus
Deal found 4/25![Aer Lingus logo]()
$460
This Justfly.com deal was found by Cheapflights users on 4/27. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/139:08 am
STL
- LHR
2 stops16h 57m
Aer Lingus
Deal found 4/27![Aer Lingus logo]()
$470
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Mon 7/273:30 pm
STL
- LHR
2 stops19h 45m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$476
This Kiwi.com deal was found by Cheapflights users on 4/27. 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.
Thu 6/46:33 pm
STL
- LHR
3 stops59h 22m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$477
This Kiwi.com deal was found by Cheapflights users on 4/27. 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.
Sun 6/144:17 pm
STL
- LHR
3 stops39h 13m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$487
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 April 29, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $991 (oojo) |
One-way from | $325 (Cheapflightsfares) |
Popular in | June |
Cheapest in | October |
Average price | $732 |
Good round-trip deal | $1,076 or less |
Good one-way deal | $473 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 April 29, 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
Tue 5/5
11:42 am-7:15 am
1 stop13h 33m
London Heathrow
Tue 5/19
6:30 am-4:10 pm
2 stops15h 40m
$1,206
Quickest round-trip
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Sun 5/3
9:40 pm-11:40 am
Nonstop8h 00m
London Heathrow
Tue 5/12
4:25 pm-7:30 pm
Nonstop9h 05m
$1,223
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Wed 7/15
9:35 pm-11:35 am
Nonstop8h 00m
London Heathrow
Fri 7/24
3:15 pm-11:56 pm
1 stop14h 41m
$1,327
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Thu 5/21
1:05 pm-10:00 am
1 stop14h 55m
London Heathrow
Thu 5/28
2:05 pm-8:25 pm
1 stop12h 20m
$1,333
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Thu 6/11
5:36 pm-1:45 pm
2 stops14h 09m
London Heathrow
Tue 6/16
6:30 am-5:23 pm
2 stops16h 53m
$1,378
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Tue 6/2
9:35 pm-11:35 am
Nonstop8h 00m
London Heathrow
Sun 6/7
12:55 pm-9:37 pm
1 stop14h 42m
$1,387
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Fri 7/17
8:35 pm-6:45 am
1 stop28h 10m
London Heathrow
Sun 7/26
5:40 pm-8:07 pm
1 stop32h 27m
$1,397
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Thu 7/16
6:30 pm-7:55 am
1 stop31h 25m
London Heathrow
Sat 7/25
5:40 pm-8:07 pm
1 stop32h 27m
$1,448
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Wed 6/17
5:36 pm-1:45 pm
2 stops14h 09m
London Heathrow
Tue 6/30
6:30 am-5:23 pm
2 stops16h 53m
$1,519
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Mon 6/8
9:21 am-7:10 am
2 stops15h 49m
London Heathrow
Mon 6/22
6:30 am-4:46 pm
2 stops16h 16m
$1,589
Showing 1-10 of 21 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 April.
| 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
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 $658). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of $1,327). 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 April 29, 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.
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 April 29, 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.
Entertainment
7.1
Overall
7.4
Boarding
7.7
Food
6.6
Comfort
7.3
Crew
8.1
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Entertainment
7.1
Overall
7.4
Boarding
7.7
Food
6.6
Comfort
7.3
Crew
8.1
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Entertainment
7.1
Overall
7.4
Boarding
7.7
Food
6.6
Comfort
7.3
Crew
8.1
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Entertainment
7.1
Overall
7.4
Boarding
7.7
Food
6.6
Comfort
7.3
Crew
8.1
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Entertainment
7.1
Overall
7.4
Boarding
7.7
Food
6.6
Comfort
7.3
Crew
8.1
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Entertainment
7.1
Overall
7.4
Boarding
7.7
Food
6.6
Comfort
7.3
Crew
8.1
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Related info for your journey
Find useful and relevant information for your journey from 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
Hounslow
Winchester
Croydon
Gatwick
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Northampton
Borehamwood
Broadway
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough
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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 April 29, 2026.
St. Louis and Heathrow flights
Browse other St. Louis and Heathrow flight options. Last updated on April 29, 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 April 29, 2026.
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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 April 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$483 | Average$898 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$529 | Average$643 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$563 | Average$866 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$572 | Average$868 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$574 | Average$840 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$577 | Average$872 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$580 | Average$839 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$635 | Average$962 | FlexibilityNo cancel fee | On-time76% |