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Cheap flights from Philadelphia to London from £280

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 15/3. 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.
KLM Logo
08:40 - 08:20
PHL
-
SOU
19h 40m
2 stops
KLM Logo
17:35 - 19:49
SOU
-
PHL
30h 14m
2 stops
£564KLM
Tue, 10 Mar - Tue, 17 Mar
Delta Logo
06:00 - 08:35
PHL
-
SOU
21h 35m
2 stops
Delta Logo
09:05 - 21:23
SOU
-
PHL
17h 18m
2 stops
£575Delta
Tue, 31 Mar - Tue, 7 Apr
KLM Logo
18:54 - 16:50
PHL
-
SOU
16h 56m
2 stops
KLM Logo
17:20 - 16:53
SOU
-
PHL
28h 33m
2 stops
£575KLM
Mon, 30 Mar - Mon, 6 Apr
Delta Logo
20:45 - 08:45
PHL
-
SOU
31h 00m
2 stops
Delta Logo
18:05 - 22:37
SOU
-
PHL
33h 32m
2 stops
£579Delta
Tue, 11 Aug - Wed, 19 Aug
Delta Logo
18:30 - 17:35
PHL
-
SOU
18h 05m
2 stops
Delta Logo
18:05 - 22:37
SOU
-
PHL
33h 32m
2 stops
£645Delta
Mon, 27 Jul - Tue, 4 Aug
Delta Logo
09:42 - 08:45
PHL
-
SOU
18h 03m
2 stops
Delta Logo
18:05 - 22:37
SOU
-
PHL
33h 32m
2 stops
£672Delta
Sun, 9 Aug - Wed, 19 Aug
Multiple Airlines Logo
21:50 - 15:35
PHL
-
SOU
13h 45m
1 stop
Multiple Airlines Logo
16:05 - 14:55
SOU
-
PHL
26h 50m
1 stop
£674Multiple Airlines
Tue, 10 Mar - Tue, 17 Mar
Scandinavian Airlines Logo
09:40 - 08:45
PHL
-
SOU
18h 05m
2 stops
Scandinavian Airlines Logo
18:05 - 17:14
SOU
-
PHL
28h 09m
2 stops
£686Scandinavian Airlines
Tue, 4 Aug - Mon, 17 Aug
Multiple Airlines Logo
21:50 - 11:55
PHL
-
SOU
10h 05m
1 stop
Multiple Airlines Logo
12:25 - 14:34
SOU
-
PHL
30h 09m
2 stops
£690Multiple Airlines
Tue, 10 Mar - Tue, 17 Mar
Aer Lingus Logo
20:25 - 16:35
PHL
-
SOU
15h 10m
1 stop
Aer Lingus Logo
09:10 - 19:49
SOU
-
PHL
15h 39m
2 stops
£693Aer Lingus
Wed, 5 Aug - Thu, 20 Aug

Aer Lingus flights from Philadelphia to Southampton

Our best Aer Lingus deals on Philadelphia to Southampton flight tickets
Aer Lingus
5 Aug
PHL20:25Philadelphia
15h 10m
1 stop
SOU16:35Southampton Eastleigh
20 Aug
SOU09:10Southampton Eastleigh
15h 39m
2 stops
PHL19:49Philadelphia
£693
Aer Lingus
5 Aug
PHL20:25Philadelphia
31h 15m
1 stop
SOU08:40Southampton Eastleigh
20 Aug
SOU09:10Southampton Eastleigh
14h 45m
1 stop
PHL18:55Philadelphia
£701
Aer Lingus
31 Mar
PHL06:00Philadelphia
21h 05m
2 stops
SOU08:05Southampton Eastleigh
7 Apr
SOU20:00Southampton Eastleigh
24h 00m
1 stop
PHL15:00Philadelphia
£712

KLM flights from Philadelphia to Southampton

Our best KLM deals on Philadelphia to Southampton flight tickets
KLM
10 Mar
PHL08:40Philadelphia
19h 40m
2 stops
SOU08:20Southampton Eastleigh
17 Mar
SOU17:35Southampton Eastleigh
30h 14m
2 stops
PHL19:49Philadelphia
£564
KLM
30 Mar
PHL18:54Philadelphia
16h 56m
2 stops
SOU16:50Southampton Eastleigh
6 Apr
SOU17:20Southampton Eastleigh
28h 33m
2 stops
PHL16:53Philadelphia
£575

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 16 February 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

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 10/3

08:40-08:20

2 stops19h 40m

Southampton Eastleigh

Tue 17/3

17:35-19:49

2 stops30h 14m

£564

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 31/3

06:00-08:35

2 stops21h 35m

Southampton Eastleigh

Tue 7/4

09:05-21:23

2 stops17h 18m

£575

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Mon 30/3

18:54-16:50

2 stops16h 56m

Southampton Eastleigh

Mon 6/4

17:20-16:53

2 stops28h 33m

£575

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 11/8

20:45-08:45

2 stops31h 00m

Southampton Eastleigh

Wed 19/8

18:05-22:37

2 stops33h 32m

£579

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Mon 27/7

18:30-17:35

2 stops18h 05m

Southampton Eastleigh

Tue 4/8

18:05-22:37

2 stops33h 32m

£645

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sun 9/8

09:42-08:45

2 stops18h 03m

Southampton Eastleigh

Wed 19/8

18:05-22:37

2 stops33h 32m

£672

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 10/3

21:50-15:35

1 stop13h 45m

Southampton Eastleigh

Tue 17/3

16:05-14:55

1 stop26h 50m

£674

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 4/8

09:40-08:45

2 stops18h 05m

Southampton Eastleigh

Mon 17/8

18:05-17:14

2 stops28h 09m

£686

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 10/3

21:50-11:55

1 stop10h 05m

Southampton Eastleigh

Tue 17/3

12:25-14:34

2 stops30h 09m

£690

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Wed 5/8

20:25-16:35

1 stop15h 10m

Southampton Eastleigh

Thu 20/8

09:10-19:49

2 stops15h 39m

£693

Flights are sorted by cheapest return flights first.

Showing 1-10 of 17 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 is the most popular carrier operating from Philadelphia to Southampton Eastleigh

Which airlines fly to Southampton?

British Airways, Virgin Atlantic and United 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 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

10h 05m

Direct flights

None
The fastest flight from Philadelphia to Southampton takes 10h 05m
There are no direct flights from Philadelphia to Southampton. There are no popular flight routes from Philadelphia to Southampton.
Search flight deals

  • 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 10h 05m.

  • 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.

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