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Cheap flights from Philadelphia to London from $538

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to London departing on 8/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Philadelphia to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
8:25 pm - 7:30 pm
PHL
-
SOU
18h 05m
1 stop
Aer Lingus Logo
9:15 am - 6:55 pm
SOU
-
PHL
14h 40m
1 stop
$983Aer Lingus
Tue, Oct 13 - Tue, Oct 20
KLM Logo
5:20 pm - 5:35 pm
PHL
-
SOU
19h 15m
2 stops
KLM Logo
5:20 pm - 4:17 pm
SOU
-
PHL
27h 57m
2 stops
$997KLM
Tue, Aug 25 - Mon, Sep 7
KLM Logo
5:20 pm - 5:35 pm
PHL
-
SOU
19h 15m
2 stops
KLM Logo
5:20 pm - 4:17 pm
SOU
-
PHL
27h 57m
2 stops
$998KLM
Tue, Aug 25 - Mon, Sep 7
KLM Logo
10:43 am - 8:45 am
PHL
-
SOU
17h 02m
2 stops
KLM Logo
5:20 pm - 4:32 pm
SOU
-
PHL
28h 12m
2 stops
$999KLM
Tue, Aug 25 - Mon, Sep 7
Aer Lingus Logo
8:25 pm - 7:30 pm
PHL
-
SOU
18h 05m
1 stop
Aer Lingus Logo
9:20 am - 6:55 pm
SOU
-
PHL
14h 35m
1 stop
$1,030Aer Lingus
Fri, Aug 21 - Fri, Aug 28
Aer Lingus Logo
8:25 pm - 7:30 pm
PHL
-
SOU
18h 05m
1 stop
Aer Lingus Logo
9:20 am - 6:55 pm
SOU
-
PHL
14h 35m
1 stop
$1,039Aer Lingus
Tue, Aug 4 - Mon, Aug 10
Delta Logo
6:00 am - 8:45 am
PHL
-
SOU
21h 45m
2 stops
Delta Logo
9:15 am - 11:56 pm
SOU
-
PHL
19h 41m
2 stops
$1,049Delta
Fri, Aug 21 - Fri, Aug 28
Multiple Airlines Logo
8:25 pm - 7:30 pm
PHL
-
SOU
18h 05m
1 stop
Multiple Airlines Logo
7:55 pm - 4:40 pm
SOU
-
PHL
25h 45m
2 stops
$1,102Multiple Airlines
Tue, Oct 13 - Tue, Oct 20
Delta Logo
5:15 am - 8:45 am
PHL
-
SOU
22h 30m
2 stops
Delta Logo
9:15 am - 10:07 pm
SOU
-
PHL
17h 52m
2 stops
$1,144Delta
Fri, Jul 24 - Tue, Jul 28
Delta Logo
6:00 am - 8:45 am
PHL
-
SOU
21h 45m
2 stops
Delta Logo
9:15 am - 10:16 pm
SOU
-
PHL
18h 01m
2 stops
$1,163Delta
Tue, Aug 4 - Mon, Aug 10

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Aer Lingus flights from Philadelphia to Southampton

Our best Aer Lingus deals on Philadelphia to Southampton flight tickets
Aer Lingus
Oct 13
PHL8:25 pmPhiladelphia
18h 05m
1 stop
SOU7:30 pmSouthampton Eastleigh
Oct 20
SOU9:15 amSouthampton Eastleigh
14h 40m
1 stop
PHL6:55 pmPhiladelphia
$983
Aer Lingus
Aug 21
PHL8:25 pmPhiladelphia
18h 05m
1 stop
SOU7:30 pmSouthampton Eastleigh
Aug 28
SOU9:20 amSouthampton Eastleigh
14h 35m
1 stop
PHL6:55 pmPhiladelphia
$1,030
Aer Lingus
Aug 4
PHL8:25 pmPhiladelphia
18h 05m
1 stop
SOU7:30 pmSouthampton Eastleigh
Aug 10
SOU9:20 amSouthampton Eastleigh
14h 35m
1 stop
PHL6:55 pmPhiladelphia
$1,039

KLM flights from Philadelphia to Southampton

Our best KLM deals on Philadelphia to Southampton flight tickets
KLM
Aug 25
PHL5:20 pmPhiladelphia
19h 15m
2 stops
SOU5:35 pmSouthampton Eastleigh
Sep 7
SOU5:20 pmSouthampton Eastleigh
27h 57m
2 stops
PHL4:17 pmPhiladelphia
$997
KLM
Aug 25
PHL5:20 pmPhiladelphia
19h 15m
2 stops
SOU5:35 pmSouthampton Eastleigh
Sep 7
SOU5:20 pmSouthampton Eastleigh
27h 57m
2 stops
PHL4:17 pmPhiladelphia
$998
KLM
Aug 25
PHL10:43 amPhiladelphia
17h 02m
2 stops
SOU8:45 amSouthampton Eastleigh
Sep 7
SOU5:20 pmSouthampton Eastleigh
28h 12m
2 stops
PHL4:32 pmPhiladelphia
$999

momondo Fare Finder

 
Customize your flight search to find flights from Philadelphia to Southampton that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated July 9, 2026.
Use the filters below to find and compare flights from Philadelphia to Southampton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 10/13

8:25 pm-7:30 pm

1 stop18h 05m

Southampton Eastleigh

Tue 10/20

9:15 am-6:55 pm

1 stop14h 40m

$983

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 8/25

5:20 pm-5:35 pm

2 stops19h 15m

Southampton Eastleigh

Mon 9/7

5:20 pm-4:17 pm

2 stops27h 57m

$997

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 8/25

5:20 pm-5:35 pm

2 stops19h 15m

Southampton Eastleigh

Mon 9/7

5:20 pm-4:17 pm

2 stops27h 57m

$998

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 8/25

10:43 am-8:45 am

2 stops17h 02m

Southampton Eastleigh

Mon 9/7

5:20 pm-4:32 pm

2 stops28h 12m

$999
Quickest round-trip

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Fri 8/21

8:25 pm-7:30 pm

1 stop18h 05m

Southampton Eastleigh

Fri 8/28

9:20 am-6:55 pm

1 stop14h 35m

$1,030

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 8/4

8:25 pm-7:30 pm

1 stop18h 05m

Southampton Eastleigh

Mon 8/10

9:20 am-6:55 pm

1 stop14h 35m

$1,039

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Fri 8/21

6:00 am-8:45 am

2 stops21h 45m

Southampton Eastleigh

Fri 8/28

9:15 am-11:56 pm

2 stops19h 41m

$1,049

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 10/13

8:25 pm-7:30 pm

1 stop18h 05m

Southampton Eastleigh

Tue 10/20

7:55 pm-4:40 pm

2 stops25h 45m

$1,102

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Fri 7/24

5:15 am-8:45 am

2 stops22h 30m

Southampton Eastleigh

Tue 7/28

9:15 am-10:07 pm

2 stops17h 52m

$1,144

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 8/4

6:00 am-8:45 am

2 stops21h 45m

Southampton Eastleigh

Mon 8/10

9:15 am-10:16 pm

2 stops18h 01m

$1,163

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Philadelphia to Southampton

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Philadelphia to Southampton Eastleigh?

Delta is the most popular carrier operating from Philadelphia to Southampton Eastleigh

What airlines fly to Southampton?

British Airways, United Airlines and American Airlines are the top three most popular airlines that fly to Southampton from Philadelphia according to our data. British Airways is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Southampton. Keep in mind that there are 22 different airlines that fly to Southampton on a routine basis, so you have a few additional options to choose from.

When to book flights from Philadelphia to Southampton

Are you open to changing your travel dates? Check out the ideal times to fly from Philadelphia to Southampton according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Philadelphia to Southampton (PHL to SOU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to Southampton

Fastest flight time

10h 10m

Direct flights

None
The fastest flight from Philadelphia to Southampton takes 10h 10m
There are no direct flights from Philadelphia to Southampton. There are no popular flight routes from Philadelphia to Southampton.
Search flight deals

Frequently asked questions about flying from Philadelphia to Southampton

  • How far is Philadelphia to Southampton Eastleigh by plane?

    Southampton Eastleigh is 3499.1 mi away from Philadelphia. A reasonable flight in good conditions will take 10h 10m.

  • When did momondo last update prices for flights from Philadelphia Airport to Southampton Eastleigh Airport?

    Prices for flights from Philadelphia Airport to Southampton Eastleigh Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Philadelphia Airport to Southampton Eastleigh Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Southampton Eastleigh Airport.

  • What documentation or ID do you need to fly to Southampton Eastleigh Airport?

    The travel and health documents required for your trip to Southampton Eastleigh Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Southampton Eastleigh Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Portsmouth

Why use momondo?

Why should I use momondo to find a flight deal from Philadelphia to Southampton?

It is quick and easy to find Philadelphia to Southampton flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Southampton that suits you.

Can I find flights from Philadelphia to Southampton with flexible booking policies on momondo?

Yes. All flights to Southampton from Philadelphia on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Philadelphia to Southampton?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Southampton from Philadelphia.

I’m not ready to book a flight from Philadelphia to Southampton right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Philadelphia to Southampton now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Southampton and let you know when they change.

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