Cheap flights from St. Louis to London-Heathrow
Cheap return flights from St. Louis to London-Heathrow
Find the best deals
All prices shown are per person based on return flights only. Prices found in the last 48 hours.
London-Heathrow flight facts
What you need to know
What are the cheapest airlines?
- American Airlines
- British Airways
- United Airlines
These airlines usually offer the cheapest flights from St. Louis to London-Heathrow.
What airlines fly indirectly?
- Delta Airlines
- Air Canada
- Lufthansa
These airlines fly from St. Louis to London-Heathrow, but you’ll have at least one layover.
How long is the flight?
9 hours 30 minutes
This is the shortest flight time from St. Louis to London-Heathrow.
Alternative flights from the UK to London-Heathrow
Check out prices for other routes
Alternative flights from St. Louis
You might find cheaper flights nearby
Today alone, Netflights has searched over five flights. 05 / Feb / 2026 is currently the lowest priced day of the year to fly the St. Louis/London-Heathrow route. There are around 35 flights on any given week from the UK to London-Heathrow and the cheapest month to fly right now is February. Not suitable? Try running another search or viewing all cheap flight deals.
How to get cheap flights from St. Louis to London-Heathrow
Tips and advice from our flight experts
You've searched for flights from St. Louis to London-Heathrow. We've found 25 flights and compared them to give you the best offers. American Airlines is, on average, the cheapest for this route. Look out for them! The cheapest offer we've found is a one-way ticket for £74 from St. Louis to London-Heathrow on 07/02/2026 at 23:40.
We've scanned hundreds of airfares from dozens of airlines across the globe. We've found 10 airlines that operate the 7,200 km flight from St. Louis to London-Heathrow.
To find the best offers, book at least 2-3 months in advance or look for last-minute deals. Consider flying with American Airlines, which operates this route, and remember the average flight duration is about 9 hours 30 minutes. After selecting an offer, fill out your information and proceed to payment. Don't forget to check our flight + hotel service to save time and money!
Other popular destinations near London-Heathrow
Where other people are flying to
