$631 Cheap Air France flights St. Louis (STL) to Southampton (SOU)

View $631 flight on Sat, Sep 20, 2025Opens in a new window

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$631 Cheap Air France flights St. Louis (STL) to Southampton (SOU)

Prices were available within the past 7 days and start at $631 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from St. Louis (STL) to Southampton (SOU)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Southampton
Airlines serving
Aer Lingus, Delta, KLM, Virgin Atlantic
Popular airline
Virgin Atlantic
Distance
4170 mi

Frequently asked questions

How much is an Air France flight from Lambert-St. Louis Intl. Airport (STL) to Southampton Airport (SOU)?
Apply the "Price (lowest to highest)" filter on Expedia to find cheap Air France round-trip flights from STL to SOU. Affordable one-way tickets from $631 are available as well.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from STL to SOU with Air France?
January is one of the least expensive months to travel to Southampton with Air France. You could also find great prices on return and one-way fares in February.
What is the cheapest time to book flights from Lambert-St. Louis Intl. Airport (STL) to Southampton Airport (SOU) with Air France?
To discover cheap flights from STL to SOU with Air France, start searching about one month before your intended departure. You can save 17% when you lock in your international tickets 18 to 29 days ahead instead of booking four to five months in advance. Another helpful tip? Booking on Sunday can lead to average savings of 17% compared to Friday (the most expensive day).**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Air France fly nonstop from Lambert-St. Louis Intl. Airport (STL) to Southampton Airport (SOU)?
Click on our "Nonstop" filter when searching for direct Air France flights from STL to SOU. You can also compare other carriers servicing the same direct trip.
What is the earliest Air France flight from STL to SOU?
Find Air France's earliest flights from STL to SOU by using our "Early Morning" and "Morning" filters. Not only will you arrive at your destination sooner, early departures also experience 20% fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Air France fly into in Southampton?
Air France flights from Lambert-St. Louis Intl. Airport (STL) to Southampton come in to Southampton Airport (SOU). This is the main gateway here.
What kind of luggage can I take on an Air France flight from Lambert-St. Louis Intl. Airport (STL) to Southampton Airport (SOU)?
On Air France, you can fly standard economy from STL to SOU with a small personal item and 1 cabin bag. Your carry-on bag should be no bigger than 21 inches x 13 inches x 9 inches and weigh under 26 lb. Exceeding baggage limits could lead to additional charges, so check your carrier's current policies before finalizing your booking.
Why fly with Air France from STL to SOU?
Air France makes flying from STL to SOU more comfortable with a 4-star airline rating and a rewarding loyalty program. You could even start earning points with Air France Flying Blue. Be sure to join our free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Air France flight from Lambert-St. Louis Intl. Airport (STL) to Southampton Airport (SOU)?
Depending on the type of fare you purchased, a fee will generally apply if you cancel or change your flight more than 24 hours after it's been confirmed. To find plane tickets with more flexibility, select our "Changes included" or "No cancel fee" filter while looking for flights. To learn more about canceling or changing your reservation, go to "Trips," select your flight and click on "Manage Booking."

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