$397 Cheap Flights from London (LGW) to St. Louis (STL)

View $397 flight on Thu, Jan 22, 2026Opens in a new window

Popular airlines from Gatwick Airport (LGW) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from London to St. Louis (LGW-STL)

Prices were available within the past 7 days and start at $397 for one-way flights and $764 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Thu, Mar 12 - Thu, Mar 26
LGW
London
STL
St. Louis
$764 Roundtrip, found 5 days ago
$764
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Mar 12 from London to St. Louis, returning Thu, Mar 26, priced at $764 found 5 days ago
American Airlines
Thu, Mar 12 - Thu, Mar 26
LGW
London
STL
St. Louis
$766 Roundtrip, found 5 days ago
$766
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Mar 12 from London to St. Louis, returning Thu, Mar 26, priced at $766 found 5 days ago
American Airlines
Thu, Mar 12 - Thu, Mar 26
LGW
London
STL
St. Louis
$768 Roundtrip, found 5 days ago
$768
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Mar 12 from London to St. Louis, returning Thu, Mar 26, priced at $768 found 5 days ago
American Airlines
Thu, Mar 12 - Thu, Mar 26
LGW
London
STL
St. Louis
$770 Roundtrip, found 5 days ago
$770
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Mar 12 from London to St. Louis, returning Thu, Mar 26, priced at $770 found 5 days ago
American Airlines
Thu, Mar 12 - Thu, Mar 26
LGW
London
STL
St. Louis
$771 Roundtrip, found 5 days ago
$771
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Mar 12 from London to St. Louis, returning Thu, Mar 26, priced at $771 found 5 days ago
American Airlines
Thu, Mar 12 - Thu, Mar 26
LGW
London
STL
St. Louis
$772 Roundtrip, found 5 days ago
$772
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Mar 12 from London to St. Louis, returning Thu, Mar 26, priced at $772 found 5 days ago
American Airlines
Thu, Mar 12 - Thu, Mar 26
LGW
London
STL
St. Louis
$774 Roundtrip, found 5 days ago
$774
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Mar 12 from London to St. Louis, returning Thu, Mar 26, priced at $774 found 5 days ago
Finnair
Thu, Mar 12 - Thu, Mar 26
LGW
London
STL
St. Louis
$776 Roundtrip, found 5 days ago
$776
Roundtrip
found 5 days ago
Select Finnair flight, departing Thu, Mar 12 from London to St. Louis, returning Thu, Mar 26, priced at $776 found 5 days ago
British Airways
Thu, Mar 12 - Thu, Mar 26
LGW
London
STL
St. Louis
$779 Roundtrip, found 5 days ago
$779
Roundtrip
found 5 days ago
Select British Airways flight, departing Thu, Mar 12 from London to St. Louis, returning Thu, Mar 26, priced at $779 found 5 days ago
Iberia
Fri, Jan 16 - Fri, Jan 23
LGW
London
STL
St. Louis
$823 Roundtrip, found 1 day ago
$823
Roundtrip
found 1 day ago
Select Iberia flight, departing Fri, Jan 16 from London to St. Louis, returning Fri, Jan 23, priced at $823 found 1 day ago

Frequently asked questions

How much does a flight from Gatwick Airport (LGW) to Lambert-St. Louis Intl. Airport (STL) cost?
Snag a cheap one-way flight from $397 or cheap return flight from $764 from Gatwick Airport (LGW) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Gatwick Airport (LGW) to Lambert-St. Louis Intl. Airport (STL)?
March is the least expensive month to fly from LGW to STL. Traveling outside of peak seasons is often the key to finding better deals on flights.
What is the cheapest airline that flies from Gatwick Airport (LGW) to Lambert-St. Louis Intl. Airport (STL)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find the carrier with the cheapest LGW to STL flight.
How many flights per day from Gatwick Airport (LGW) to Lambert-St. Louis Intl. Airport (STL)?
Nonstop flights from Gatwick Airport (LGW) to Lambert-St. Louis Intl. Airport (STL) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from LGW to STL?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* But this can vary based on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Gatwick Airport (LGW) to Lambert-St. Louis Intl. Airport (STL)?
Opt for a flight from Gatwick Airport (LGW) to Lambert-St. Louis Intl. Airport (STL) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures after this time are on average 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 Gatwick Airport (LGW) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute bookings from LGW to STL are generally more expensive. To secure the lowest rates, start looking for flights early. That being said, if you're flexible with your travel dates, it's possible to land a cheap ticket just before your departure.
Is it cheaper to book a LGW to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking a LGW to STL flight and hotel package with Expedia could lead to significant savings. Better still, managing everything in one place will take the stress out of planning your trip. Simply secure your flights and select from our wide range of stays, then personalize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Gatwick Airport (LGW) to Lambert-St. Louis Intl. Airport (STL)?
In most cases, you're able to cancel or reschedule your LGW to STL flight. However, there may be additional charges, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you need more details, visit our Customer Service portal.

Travel information

Origin airport
Gatwick
Destination airport
Lambert-St. Louis Intl.
Roundtrip price
$763
Distance
4210 mi

Book with confidence

London to St. Louis Flights

The cheapest times to fly from London to St. Louis

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 London to St. Louis are during the month of March. You can find some of the cheapest flights from London to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from London to St. Louis: 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 London to St. Louis

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 London to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $397 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 London to St. Louis 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 London to St. Louis 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.

 

London to St. Louis Flights

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*Available to One Key members.