Cheap Flights from St. Louis (STL) to London (LTN)

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Luton Airport (LTN)

Alternative airports near London

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Heathrow LHR. Cheapest and Closest option available. Average driving time to city center is 28 minutes. Flights from $630
LHR
Heathrow
CheapestClosest
Average driving time to city center28 min
Flights from $630

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Luton Airport (LTN) cost?
Lock in a cheap one-way flight or cheap return flight from Lambert-St. Louis Intl. Airport (STL) to Luton Airport (LTN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Luton Airport (LTN)?
The cheapest month to fly from STL to LTN is , when there's less demand. Off-peak season is often when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Luton Airport (LTN)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest STL to LTN flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Luton Airport (LTN)?
Direct flights from Lambert-St. Louis Intl. Airport (STL) to Luton Airport (LTN) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to LTN?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Luton Airport (LTN)?
To avoid possible delays on the Lambert-St. Louis Intl. Airport (STL) to Luton Airport (LTN) route, aim to fly before 3 PM. Departures after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Luton Airport (LTN) last-minute?
Booking your plane ticket from STL to LTN just before your trip is generally more expensive. But if there's some wiggle room with your travel dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book a STL to LTN flight and hotel package?
You can save money by booking a STL to LTN flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. Once you've selected your ideal flights and accommodations, you can add extras such as activities, car rentals and tours.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Luton Airport (LTN)?
Typically, it's possible to cancel or reschedule your STL to LTN flight. However, if it's been more than 24 hours since booking, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Luton
Distance
4179 mi

Book with confidence

St. Louis to London Flights

The cheapest times to fly from St. Louis to London

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to London are during the month of . You can find some of the cheapest flights from St. Louis to London with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to London

Sunday is one of the best days to book for cheap flights from St. Louis to London: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to London

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to London in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to London flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to London airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to London Flights

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*Available to One Key members.