$406+ Cheap flights from Heathrow (LHR) to St. Louis (STL)
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 6/25. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Heathrow to St. Louis with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from London Heathrow to Lambert-St Louis are usually found in February or September, booked 26 days in advance, depart on a Thursday or Wednesday and return on a Thursday
Cheap flight deals from Heathrow to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 12, 2025.
Round-trip from | $872 (Scandinavian Airlines) |
|---|---|
One-way from | $406 (Mytrip) |
Popular in | December |
Cheapest in | February |
Average price | $967 |
Find flight deals from Heathrow to St. Louis
Cheapest flights from Heathrow to St. LouisExplore the most affordable flight options available from Heathrow to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
Explore the most affordable flight options available from Heathrow to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
This Scandinavian Airlines deal was found by Cheapflights users on 6/11. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This ChecknFly deal was found by Cheapflights users on 6/11. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 6/11. 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.
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This ChecknFly deal was found by Cheapflights users on 6/12. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Netflights deal was found by Cheapflights users on 6/11. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This ChecknFly deal was found by Cheapflights users on 6/12. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This deal was found by Cheapflights users on 6/12. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Ovago deal was found by Cheapflights users on 6/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This The Travel House deal was found by Cheapflights users on 6/12. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from Heathrow to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
Use the filters below to find and compare flights from London Heathrow Airport to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Fri 10/3
6:40 am-11:39 pm
3 stops22h 59m
Lambert-St Louis
Sat 10/11
3:30 pm-5:40 pm
2 stops20h 10m
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Wed 10/29
1:35 pm-10:47 pm
1 stop14h 12m
Lambert-St Louis
Sat 11/1
11:45 am-11:50 am
2 stops19h 05m
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Wed 7/9
3:05 pm-9:52 am
3 stops24h 47m
Lambert-St Louis
Wed 7/16
11:24 am-8:20 pm
3 stops26h 56m
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Sat 9/13
3:10 pm-10:50 pm
1 stop13h 40m
Lambert-St Louis
Sat 9/27
12:28 pm-6:25 am
1 stop11h 57m
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Sat 11/15
10:15 am-6:17 pm
1 stop14h 02m
Lambert-St Louis
Sat 11/29
1:55 pm-10:00 am
1 stop14h 05m
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Fri 9/12
6:30 am-3:58 pm
2 stops15h 28m
Lambert-St Louis
Sat 9/20
7:20 am-7:15 am
1 stop17h 55m
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Sat 11/15
9:00 am-6:02 pm
2 stops15h 02m
Lambert-St Louis
Fri 11/21
10:45 am-7:40 am
2 stops14h 55m
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Wed 8/27
5:40 pm-7:45 pm
2 stops32h 05m
Lambert-St Louis
Sun 8/31
4:00 pm-9:00 pm
2 stops23h 00m
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Wed 10/15
9:15 am-7:08 pm
1 stop15h 53m
Lambert-St Louis
Sun 10/19
8:01 pm-6:50 am
1 stop28h 49m
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Mon 9/8
11:05 am-5:52 pm
1 stop12h 47m
Lambert-St Louis
Fri 9/19
9:17 am-6:20 am
1 stop15h 03m
Best time to book a flight from Heathrow to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Heathrow with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from London Heathrow Airport to St. Louis
How far ahead should I book a flight from London Heathrow Airport to St. Louis?
Use this chart to determine the optimal time to book a round-trip flight from Heathrow to St. Louis. Price data was last updated on June 9, 2025.
The best time to book flights from London Heathrow Airport to St. Louis is 26 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from London Heathrow Airport to St. Louis?
Currently, August is the cheapest month in which you can book a flight from London Heathrow Airport to St. Louis (average of $311). Flying from London Heathrow Airport to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from LHR to STL?
Find hourly flight availability from Heathrow to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.
It’s optimal to fly from London Heathrow Airport to St. Louis at noon. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight in the morning.
Rainfall in St. Louis by month
Plan your trip to St. Louis by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.
Temperature in St. Louis by month
Plan your trip to St. Louis by taking into account the average temperature totals by month.
If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).
Reviews of airlines servicing St. Louis
Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated June 12, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Finnair from London to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
Kim,May 2025
PIH - SLC
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
Kim,May 2025
PIH - SLC
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
Kim,May 2025
PIH - SLC
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
Kim,May 2025
PIH - SLC
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
Kim,May 2025
PIH - SLC
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
Kim,May 2025
PIH - SLC
Related info for your journey
Find useful and relevant information for your journey from Heathrow to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near London Heathrow Airport?
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Alternative routes for Heathrow to St. Louis
See prices for flight routes from nearby airports that may be better suited for you.
Top 4 airlines flying from Heathrow to St. Louis
Discover the top 4 airlines that operate flights from Heathrow to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$278 | Average$1,338 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$555 | Average$1,124 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$925 | Average$928 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$952 | Average$1,263 | FlexibilityNo cancel fee | On-time69% |