$561 Cheap Aer Lingus flights Philadelphia (PHL) to Southampton (SOU)

View $561 flight on Wed, Nov 5, 2025Opens in a new window

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$561 Cheap Aer Lingus flights Philadelphia (PHL) to Southampton (SOU)

Prices were available within the past 7 days and start at $561 for one-way flights and $735 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Mon, Aug 18 - Wed, Aug 27
PHL
Philadelphia
SOU
Southampton
$735 Roundtrip, found 5 hours ago
$735
Roundtrip
found 5 hours ago
Select Aer Lingus flight, departing Mon, Aug 18 from Philadelphia to Southampton, returning Wed, Aug 27, priced at $735 found 5 hours ago
Aer Lingus
Tue, Oct 21 - Sun, Nov 2
PHL
Philadelphia
SOU
Southampton
$769 Roundtrip, found 4 days ago
$769
Roundtrip
found 4 days ago
Select Aer Lingus flight, departing Tue, Oct 21 from Philadelphia to Southampton, returning Sun, Nov 2, priced at $769 found 4 days ago
Aer Lingus
Wed, Sep 24 - Wed, Oct 8
PHL
Philadelphia
SOU
Southampton
$819 Roundtrip, found 3 days ago
$819
Roundtrip
found 3 days ago
Select Aer Lingus flight, departing Wed, Sep 24 from Philadelphia to Southampton, returning Wed, Oct 8, priced at $819 found 3 days ago
Aer Lingus
Wed, Oct 8 - Tue, Oct 14
PHL
Philadelphia
SOU
Southampton
$835 Roundtrip, found 6 days ago
$835
Roundtrip
found 6 days ago
Select Aer Lingus flight, departing Wed, Oct 8 from Philadelphia to Southampton, returning Tue, Oct 14, priced at $835 found 6 days ago
Aer Lingus
Thu, Sep 11 - Fri, Sep 19
PHL
Philadelphia
SOU
Southampton
$841 Roundtrip, found 4 days ago
$841
Roundtrip
found 4 days ago
Select Aer Lingus flight, departing Thu, Sep 11 from Philadelphia to Southampton, returning Fri, Sep 19, priced at $841 found 4 days ago
Aer Lingus
Thu, Sep 11 - Fri, Sep 19
PHL
Philadelphia
SOU
Southampton
$847 Roundtrip, found 4 days ago
$847
Roundtrip
found 4 days ago
Select Aer Lingus flight, departing Thu, Sep 11 from Philadelphia to Southampton, returning Fri, Sep 19, priced at $847 found 4 days ago
Flights from Philadelphia (PHL) to Southampton (SOU)
Origin airport
Philadelphia Intl.
Destination airport
Southampton
Airlines serving
Aer Lingus, Delta, KLM, Virgin Atlantic
Popular airline
Aer Lingus
Distance
3509 mi

Frequently asked questions

How much is an Aer Lingus flight from Philadelphia Intl. Airport (PHL) to Southampton Airport (SOU)?
You can discover affordable return Aer Lingus flights from $735 from PHL to SOU by filtering your results from "Price (lowest to highest)" on Expedia. Or look for deals from $561 for a one-way trip.**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 PHL to SOU with Aer Lingus?
Browse for return or one-way flights to Southampton in January or February. You could find lower fares with Aer Lingus during these off-season months.
What is the cheapest time to book flights from Philadelphia Intl. Airport (PHL) to Southampton Airport (SOU) with Aer Lingus?
Search for Aer Lingus flights from PHL to SOU about one month before you want to go. The most affordable time to book an international flight is usually 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. Regardless of fare class and itinerary, the best day of the week to book international airfare is usually Sunday. Friday is often the most expensive. Travelers who book 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 Aer Lingus fly nonstop from Philadelphia Intl. Airport (PHL) to Southampton Airport (SOU)?
To figure out if there's a direct trip from PHL to SOU with Aer Lingus or other airlines, check the "Nonstop" filter when searching for tickets.
What is the earliest Aer Lingus flight from PHL to SOU?
To find the earliest departures from PHL to SOU with Aer Lingus, sort your results by "Early Morning" and "Morning." Booking an early flight generally means you'll experience 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 Aer Lingus fly into in Southampton?
Get on an Aer Lingus flight from Philadelphia Intl. Airport (PHL) to Southampton, and you'll likely touch down at Southampton Airport (SOU). This is the airline's primary hub here.
What kind of luggage can I take on an Aer Lingus flight from Philadelphia Intl. Airport (PHL) to Southampton Airport (SOU)?
For checked luggage, passengers can bring 1 checked-in bag weighing up to 50 lb with dimensions not exceeding 62 inches. You can also bring 1 cabin bag in the cabin when flying standard economy from PHL to SOU with Aer Lingus. This carry-on should weigh less than 22 lb and be no larger than 21 inches x 15 inches x 9 inches. Going over these restrictions can mean extra fees, so read Aer Lingus's baggage allowance rules before you start packing.
Why fly with Aer Lingus from PHL to SOU?
Offering a rewarding loyalty program and a 4-star airline rating, Aer Lingus is a favorite for many passengers flying from PHL to SOU. What's more, if you're an Aer Lingus AerClub and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which you can put toward future getaways.*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 Aer Lingus flight from Philadelphia Intl. Airport (PHL) to Southampton Airport (SOU)?
Changes are usually free within 24 hours of making a booking, but your airline may charge a fee after that time. For further information about modifying your reservation, check out your "Trips," select your flight and click on "Manage Booking." If you'd like the freedom to adjust your plans without being charged, check the "Changes included" and "No cancel fee" filters when organizing your next trip.

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*Available to One Key members.