Cheap flights from St. Louis to London Heathrow Airport from $337
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to London Heathrow Airport departing on 1/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from St. Louis to London
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Cheap bus & train deals from St. Louis to London
All round-trip flight deals to London
United Airlines flights from St. Louis to London Heathrow Airport
Our best United Airlines deals on St. Louis to London Heathrow Airport flight tickets
Air Canada flights from St. Louis to London Heathrow Airport
Our best Air Canada deals on St. Louis to London Heathrow Airport flight tickets
See travel insights to London from
How to get the cheapest flight ticket from St. Louis to London Heathrow Airport
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly from St. Louis to London Heathrow Airport?
February. The cheapest time of year to fly to London Heathrow Airport from St. Louis is February. Most expensive is June
What is the cheapest day to depart St. Louis for London Heathrow Airport?
Tuesday. The cheapest day of the week is typically Tuesday. The most expensive is typically Friday
When is the cheapest time to fly from St. Louis to London Heathrow Airport?
In the evening. St. Louis to London Heathrow Airport flights are approximately 15% more expensive in the morning than in the evening
How far in advance should you book St. Louis to London Heathrow Airport flights?
55 days before. The cheapest time to buy a flight from St. Louis to London Heathrow Airport is approximately 55 days to departure
Can stopping save me money on St. Louis to London Heathrow Airport flights?
You could potentially save up to 5% on your flight if you consider stops on a St. Louis to London Heathrow Airport flight.
When to book flights from St. Louis to London Heathrow Airport
Cheap St. Louis to London Heathrow Airport (STL to LHR) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to London Heathrow Airport
How far is Lambert-St Louis to London Heathrow by plane?
Lambert-St Louis and London Heathrow are 4185.8 mi apart from one another. By plane, this route typically takes 9h 55m.
When did momondo last update prices for flights from Lambert-St Louis Airport to London Heathrow Airport?
Prices for flights from Lambert-St Louis Airport to London Heathrow Airport were last updated today.
How many operators does momondo search for flights from Lambert-St Louis Airport to London Heathrow Airport?
As of November 2024, there are 10 operators available to choose from for flights from Lambert-St Louis Airport to London Heathrow Airport.
How old do you have to be to fly from Lambert-St Louis Airport to London Heathrow Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to London Heathrow Airport?
momondo data reveals that the most frequently booked airline on the route from St. Louis to London Heathrow Airport is American Airlines, representing 36.25% of all bookings. The subsequent popular airlines are British Airways at 27.43%, United Airlines at 10.81%, and Iberia at 6.40%.
Best airlines flying from St. Louis to London Heathrow Airport
Compare and see reviews for airlines that fly from St. Louis to London Heathrow Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $617 | Free Cancellation | Rating 7.0 2,662 reviews | |||
| PriceFrom $653 | Free Cancellation | Rating 6.6 6,837 reviews | |||
| PriceFrom $654 | Free Cancellation | Rating 7.5 663 reviews | |||
| PriceFrom $663 | Free Cancellation | Rating 7.4 9,171 reviews | |||
| PriceFrom $664 | Free Cancellation | Rating 8.0 8,756 reviews | |||
| PriceFrom $675 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $707 | Free Cancellation | Rating 7.8 1,350 reviews | |||
| PriceFrom $716 | Free Cancellation | Rating 7.0 8,237 reviews | |||
| PriceFrom $769 | Free Cancellation | Rating 7.4 1,523 reviews | |||
| PriceFrom $802 | Free Cancellation | Rating 6.8 7,148 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to London?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from St. Louis.
Can I find flights from St. Louis to London with flexible booking policies on momondo?
Flights from St. Louis to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from St. Louis to London?
Once all potential St. Louis to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from St. Louis to London right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to London from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.