$529 Cheap Delta flights St. Louis (STL) to Southampton (SOU)

View $529 flight on Sun, Sep 14, 2025Opens in a new window

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$529 Cheap Delta flights St. Louis (STL) to Southampton (SOU)

Prices were available within the past 7 days and start at $529 for one-way flights and $889 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sun, Sep 14 - Tue, Sep 23
STL
St. Louis
SOU
Southampton
$889 Roundtrip, found 4 hours ago
$889
Roundtrip
found 4 hours ago
Select Delta flight, departing Sun, Sep 14 from St. Louis to Southampton, returning Tue, Sep 23, priced at $889 found 4 hours ago
Delta
Mon, Sep 22 - Mon, Sep 29
STL
St. Louis
SOU
Southampton
$895 Roundtrip, found 2 days ago
$895
Roundtrip
found 2 days ago
Select Delta flight, departing Mon, Sep 22 from St. Louis to Southampton, returning Mon, Sep 29, priced at $895 found 2 days ago
Delta
Sun, Sep 14 - Wed, Sep 24
STL
St. Louis
SOU
Southampton
$921 Roundtrip, found 4 hours ago
$921
Roundtrip
found 4 hours ago
Select Delta flight, departing Sun, Sep 14 from St. Louis to Southampton, returning Wed, Sep 24, priced at $921 found 4 hours ago
Delta
Sun, Sep 14 - Wed, Sep 24
STL
St. Louis
SOU
Southampton
$921 Roundtrip, found 4 hours ago
$921
Roundtrip
found 4 hours ago
Select Delta flight, departing Sun, Sep 14 from St. Louis to Southampton, returning Wed, Sep 24, priced at $921 found 4 hours ago
Delta
Wed, Aug 6 - Thu, Aug 28
STL
St. Louis
SOU
Southampton
$926 Roundtrip, found 4 days ago
$926
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Aug 6 from St. Louis to Southampton, returning Thu, Aug 28, priced at $926 found 4 days ago
Delta
Sun, Sep 14 - Wed, Sep 24
STL
St. Louis
SOU
Southampton
$927 Roundtrip, found 4 hours ago
$927
Roundtrip
found 4 hours ago
Select Delta flight, departing Sun, Sep 14 from St. Louis to Southampton, returning Wed, Sep 24, priced at $927 found 4 hours ago
Flights from St. Louis (STL) to Southampton (SOU)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Southampton
Distance
4170 mi

Frequently asked questions

How much is a Delta Air Lines flight from Lambert-St. Louis Intl. Airport (STL) to Southampton Airport (SOU)?
Use the "Price (lowest to highest)" filter on Expedia to look for cheap Delta Air Lines round-trip flights from $889 from STL to SOU. Affordable one-way options from $529 are available too.**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 Delta Air Lines?
Delta Air Lines flights to Southampton are usually cheaper in the quieter months of January and February. Whether you're after a round-trip or one-way ticket, you could score a better deal then.
What is the cheapest time to book flights from Lambert-St. Louis Intl. Airport (STL) to Southampton Airport (SOU) with Delta Air Lines?
Look for Delta Air Lines flights from STL to SOU about one month before you want to go. The most affordable time to reserve an international flight is generally 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. Regardless of itinerary and fare class, the best day of the week to book international airfare is usually Sunday. Friday is often the most expensive. Passengers booking on a Sunday can save 17% on average compared to those who book on a Friday.**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 Delta Air Lines fly nonstop from Lambert-St. Louis Intl. Airport (STL) to Southampton Airport (SOU)?
Click on our "Nonstop" filter when browsing for direct Delta Air Lines flights from STL to SOU. You'll also be able to compare other carriers servicing the same nonstop journey.
What is the earliest Delta Air Lines flight from STL to SOU?
Find Delta Air Lines's earliest flights from STL to SOU by selecting the "Early Morning" and "Morning" filters. Not only will you arrive sooner, early departures are also 20% less likely to be canceled.**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 Delta Air Lines fly into in Southampton?
Delta Air Lines flights from Lambert-St. Louis Intl. Airport (STL) to Southampton land at Southampton Airport (SOU). This is the main entry point to this city.
Why fly with Delta Air Lines from STL to SOU?
Heading from STL to SOU with Delta Air Lines comes with a host of perks, including a rewarding loyalty program and an excellent in-flight experience. Plus, when you book through Expedia, One Key™ members can earn OneKeyCash™* to spend on select future travel purchases. That's on top of the Delta SkyMiles points you can earn with Delta Air Lines.*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 Delta Air Lines flight from Lambert-St. Louis Intl. Airport (STL) to Southampton Airport (SOU)?
Depending on the ticket type you purchased, a fee may apply if you change or cancel your flight more than 24 hours after it's confirmed. To secure tickets with more flexibility, select our "Changes included" or "No cancel fee" filter when looking for flights. For additional information on canceling or modifying your reservation, visit "Trips," select your flight and tick "Manage Booking."

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