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Cheap flights from Philadelphia to London from £436

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 3/10. 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
0 bags
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Cheap return flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
20:25 - 19:30
PHL
-
SOU
18h 05m
1 stop
Aer Lingus Logo
09:20 - 18:55
SOU
-
PHL
14h 35m
1 stop
£687Aer Lingus
Tue, 25 Aug - Mon, 7 Sep
KLM Logo
17:38 - 16:50
PHL
-
SOU
18h 12m
2 stops
KLM Logo
09:05 - 22:37
SOU
-
PHL
18h 32m
2 stops
£760KLM
Wed, 2 Sep - Fri, 11 Sep
Delta Logo
10:40 - 08:45
PHL
-
SOU
17h 05m
2 stops
Delta Logo
09:15 - 23:40
SOU
-
PHL
19h 25m
2 stops
£782Delta
Sun, 9 Aug - Fri, 28 Aug
Delta Logo
09:40 - 08:35
PHL
-
SOU
17h 55m
2 stops
Delta Logo
09:05 - 00:27
SOU
-
PHL
20h 22m
2 stops
£797Delta
Thu, 3 Sep - Thu, 10 Sep
Delta Logo
10:40 - 08:45
PHL
-
SOU
17h 05m
2 stops
Delta Logo
09:15 - 23:40
SOU
-
PHL
19h 25m
2 stops
£804Delta
Sun, 9 Aug - Tue, 25 Aug
Delta Logo
09:40 - 08:45
PHL
-
SOU
18h 05m
2 stops
Delta Logo
09:05 - 01:01
SOU
-
PHL
20h 56m
2 stops
£819Delta
Tue, 25 Aug - Mon, 7 Sep
Delta Logo
19:59 - 17:35
PHL
-
SOU
16h 36m
2 stops
Delta Logo
18:05 - 16:17
SOU
-
PHL
27h 12m
2 stops
£841Delta
Thu, 13 Aug - Wed, 26 Aug
Delta Logo
05:45 - 08:35
PHL
-
SOU
21h 50m
2 stops
Delta Logo
17:20 - 16:30
SOU
-
PHL
28h 10m
2 stops
£847Delta
Sun, 10 May - Wed, 20 May
Delta Logo
19:59 - 17:35
PHL
-
SOU
16h 36m
2 stops
Delta Logo
09:15 - 20:33
SOU
-
PHL
16h 18m
2 stops
£856Delta
Thu, 13 Aug - Sat, 29 Aug
Multiple Airlines Logo
18:50 - 16:50
PHL
-
SOU
17h 00m
1 stop
Multiple Airlines Logo
20:00 - 16:05
SOU
-
PHL
25h 05m
1 stop
£877Multiple Airlines
Tue, 25 Aug - Mon, 7 Sep

Aer Lingus flights from Philadelphia to Southampton

Our best Aer Lingus deals on Philadelphia to Southampton flight tickets
Aer Lingus
25 Aug
PHL20:25Philadelphia
18h 05m
1 stop
SOU19:30Southampton Eastleigh
7 Sept
SOU09:20Southampton Eastleigh
14h 35m
1 stop
PHL18:55Philadelphia
£687
Aer Lingus
25 Aug
PHL08:28Philadelphia
30h 02m
2 stops
SOU19:30Southampton Eastleigh
7 Sept
SOU20:00Southampton Eastleigh
27h 55m
1 stop
PHL18:55Philadelphia
£893
Aer Lingus
25 May
PHL18:30Philadelphia
32h 35m
1 stop
SOU08:05Southampton Eastleigh
1 Jun
SOU17:20Southampton Eastleigh
30h 32m
2 stops
PHL18:52Philadelphia
£958

KLM flights from Philadelphia to Southampton

Our best KLM deals on Philadelphia to Southampton flight tickets
KLM
2 Sept
PHL17:38Philadelphia
18h 12m
2 stops
SOU16:50Southampton Eastleigh
11 Sept
SOU09:05Southampton Eastleigh
18h 32m
2 stops
PHL22:37Philadelphia
£760
KLM
9 Aug
PHL10:40Philadelphia
17h 05m
2 stops
SOU08:45Southampton Eastleigh
21 Aug
SOU09:15Southampton Eastleigh
20h 46m
2 stops
PHL01:01Philadelphia
£901
KLM
8 Jun
PHL17:35Philadelphia
18h 15m
2 stops
SOU16:50Southampton Eastleigh
15 Jun
SOU17:20Southampton Eastleigh
28h 16m
2 stops
PHL16:36Philadelphia
£999

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 28 April 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 return flight
Fastest return journey

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 25/8

20:25-19:30

1 stop18h 05m

Southampton Eastleigh

Mon 7/9

09:20-18:55

1 stop14h 35m

£687

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Wed 2/9

17:38-16:50

2 stops18h 12m

Southampton Eastleigh

Fri 11/9

09:05-22:37

2 stops18h 32m

£760

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sun 9/8

10:40-08:45

2 stops17h 05m

Southampton Eastleigh

Fri 28/8

09:15-23:40

2 stops19h 25m

£782

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Thu 3/9

09:40-08:35

2 stops17h 55m

Southampton Eastleigh

Thu 10/9

09:05-00:27

2 stops20h 22m

£797

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sun 9/8

10:40-08:45

2 stops17h 05m

Southampton Eastleigh

Tue 25/8

09:15-23:40

2 stops19h 25m

£804

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 25/8

09:40-08:45

2 stops18h 05m

Southampton Eastleigh

Mon 7/9

09:05-01:01

2 stops20h 56m

£819

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Thu 13/8

19:59-17:35

2 stops16h 36m

Southampton Eastleigh

Wed 26/8

18:05-16:17

2 stops27h 12m

£841

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sun 10/5

05:45-08:35

2 stops21h 50m

Southampton Eastleigh

Wed 20/5

17:20-16:30

2 stops28h 10m

£847

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Thu 13/8

19:59-17:35

2 stops16h 36m

Southampton Eastleigh

Sat 29/8

09:15-20:33

2 stops16h 18m

£856

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 25/8

18:50-16:50

1 stop17h 00m

Southampton Eastleigh

Mon 7/9

20:00-16:05

1 stop25h 05m

£877

Flights are sorted by cheapest return flights first.

Showing 1-10 of 18 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?

Aer Lingus and Delta are the most popular carriers operating from Philadelphia to Southampton Eastleigh

Which airlines fly to Southampton?

Virgin Atlantic, British Airways and United Airlines are the top three most popular airlines that fly to Southampton from Philadelphia according to our data. Virgin Atlantic is the first choice among our users, with 39% of people opting to fly with this airline when travelling to Southampton. Keep in mind that there are 13 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 return 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

16h 17m

Direct flights

None
The fastest flight from Philadelphia to Southampton takes 16h 17m
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?

    A flight from Philadelphia to Southampton Eastleigh will travel around 3499.1 mi. By plane, this route typically takes 16h 17m.

  • 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 updated daily.

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, 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.

Travelling 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?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Philadelphia to Southampton. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to Southampton from Philadelphia which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search for Philadelphia to Southampton flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for Philadelphia to Southampton flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Southampton trip

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