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Cheap flights from Philadelphia to London from £343

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 12/9. 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
12:33 - 08:45
PHL
-
SOU
15h 12m
2 stops
KLM Logo
17:20 - 16:17
SOU
-
PHL
27h 57m
2 stops
£736KLM
Tue, 25 Aug - Mon, 7 Sep
Delta Logo
13:20 - 17:00
PHL
-
SOU
22h 40m
2 stops
Delta Logo
17:30 - 17:19
SOU
-
PHL
28h 49m
2 stops
£737Delta
Wed, 4 Nov - Mon, 16 Nov
Delta Logo
06:00 - 17:00
PHL
-
SOU
30h 00m
2 stops
Delta Logo
08:50 - 19:24
SOU
-
PHL
15h 34m
2 stops
£741Delta
Sun, 1 Nov - Thu, 19 Nov
Delta Logo
06:00 - 08:50
PHL
-
SOU
22h 50m
2 stops
Delta Logo
08:40 - 19:24
SOU
-
PHL
15h 44m
2 stops
£773Delta
Sat, 31 Oct - Tue, 17 Nov
Delta Logo
06:00 - 17:00
PHL
-
SOU
30h 00m
2 stops
Delta Logo
17:30 - 20:37
SOU
-
PHL
32h 07m
2 stops
£778Delta
Sun, 1 Nov - Sun, 15 Nov
Delta Logo
19:29 - 17:00
PHL
-
SOU
16h 31m
2 stops
Delta Logo
08:40 - 19:24
SOU
-
PHL
15h 44m
2 stops
£797Delta
Mon, 2 Nov - Tue, 17 Nov
Multiple Airlines Logo
13:53 - 08:40
PHL
-
SOU
13h 47m
2 stops
Multiple Airlines Logo
09:20 - 16:00
SOU
-
PHL
11h 40m
1 stop
£837Multiple Airlines
Thu, 4 Jun - Thu, 11 Jun
Multiple Airlines Logo
18:50 - 19:30
PHL
-
SOU
19h 40m
1 stop
Multiple Airlines Logo
20:00 - 15:30
SOU
-
PHL
24h 30m
2 stops
£852Multiple Airlines
Tue, 25 Aug - Mon, 7 Sep
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
£856Multiple Airlines
Tue, 25 Aug - Mon, 7 Sep
Multiple Airlines Logo
18:50 - 16:50
PHL
-
SOU
17h 00m
1 stop
Multiple Airlines Logo
20:00 - 18:55
SOU
-
PHL
27h 55m
1 stop
£857Multiple 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
4 Jun
PHL13:53Philadelphia
13h 47m
2 stops
SOU08:40Southampton Eastleigh
11 Jun
SOU09:20Southampton Eastleigh
28h 53m
2 stops
PHL09:13Philadelphia
£874
Aer Lingus
2 Aug
PHL18:25Philadelphia
17h 25m
1 stop
SOU16:50Southampton Eastleigh
13 Aug
SOU09:20Southampton Eastleigh
29h 18m
2 stops
PHL09:38Philadelphia
£908
Aer Lingus
19 Sept
PHL20:25Philadelphia
15h 25m
1 stop
SOU16:50Southampton Eastleigh
28 Sept
SOU20:00Southampton Eastleigh
20h 45m
1 stop
PHL11:45Philadelphia
£938

Delta flights from Philadelphia to Southampton

Our best Delta deals on Philadelphia to Southampton flight tickets
Delta
4 Nov
PHL13:20Philadelphia
22h 40m
2 stops
SOU17:00Southampton Eastleigh
16 Nov
SOU17:30Southampton Eastleigh
28h 49m
2 stops
PHL17:19Philadelphia
£737
Delta
1 Nov
PHL06:00Philadelphia
30h 00m
2 stops
SOU17:00Southampton Eastleigh
16 Nov
SOU17:30Southampton Eastleigh
28h 49m
2 stops
PHL17:19Philadelphia
£741
Delta
31 Oct
PHL06:00Philadelphia
22h 50m
2 stops
SOU08:50Southampton Eastleigh
17 Nov
SOU08:40Southampton Eastleigh
15h 44m
2 stops
PHL19:24Philadelphia
£773

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 9 May 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

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 25/8

12:33-08:45

2 stops15h 12m

Southampton Eastleigh

Mon 7/9

17:20-16:17

2 stops27h 57m

£736

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Wed 4/11

13:20-17:00

2 stops22h 40m

Southampton Eastleigh

Mon 16/11

17:30-17:19

2 stops28h 49m

£737

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sun 1/11

06:00-17:00

2 stops30h 00m

Southampton Eastleigh

Thu 19/11

08:50-19:24

2 stops15h 34m

£741

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sat 31/10

06:00-08:50

2 stops22h 50m

Southampton Eastleigh

Tue 17/11

08:40-19:24

2 stops15h 44m

£773

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sun 1/11

06:00-17:00

2 stops30h 00m

Southampton Eastleigh

Sun 15/11

17:30-20:37

2 stops32h 07m

£778

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Mon 2/11

19:29-17:00

2 stops16h 31m

Southampton Eastleigh

Tue 17/11

08:40-19:24

2 stops15h 44m

£797
Fastest return journey

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Thu 4/6

13:53-08:40

2 stops13h 47m

Southampton Eastleigh

Thu 11/6

09:20-16:00

1 stop11h 40m

£837

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 25/8

18:50-19:30

1 stop19h 40m

Southampton Eastleigh

Mon 7/9

20:00-15:30

2 stops24h 30m

£852

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

£856

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 25/8

18:50-16:50

1 stop17h 00m

Southampton Eastleigh

Mon 7/9

20:00-18:55

1 stop27h 55m

£857

Flights are sorted by cheapest return flights first.

Showing 1-10 of 15 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 and Aer Lingus 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 38% 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

15h 12m

Direct flights

None
The fastest flight from Philadelphia to Southampton takes 15h 12m
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 15h 12m.

  • 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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