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Cheap flights from Philadelphia to London from £551

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 29/8. 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
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Find the cheapest flights from Philadelphia to London

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
£738Aer Lingus
Thu, 24 Sep - Mon, 5 Oct
Aer Lingus Logo
13:51 - 08:40
PHL
-
SOU
13h 49m
2 stops
Aer Lingus Logo
20:00 - 11:45
SOU
-
PHL
20h 45m
1 stop
£758Aer Lingus
Thu, 24 Sep - Mon, 5 Oct
Multiple Airlines Logo
18:50 - 16:50
PHL
-
SOU
17h 00m
1 stop
Multiple Airlines Logo
09:20 - 09:43
SOU
-
PHL
29h 23m
2 stops
£767Multiple Airlines
Fri, 25 Sep - Sat, 3 Oct
Multiple Airlines Logo
13:51 - 08:40
PHL
-
SOU
13h 49m
2 stops
Multiple Airlines Logo
15:15 - 11:45
SOU
-
PHL
25h 30m
2 stops
£792Multiple Airlines
Thu, 24 Sep - Mon, 5 Oct
Aer Lingus Logo
10:42 - 08:40
PHL
-
SOU
16h 58m
2 stops
Aer Lingus Logo
09:20 - 09:43
SOU
-
PHL
29h 23m
2 stops
£803Aer Lingus
Fri, 25 Sep - Sat, 3 Oct
Aer Lingus Logo
13:53 - 08:35
PHL
-
SOU
13h 42m
2 stops
Aer Lingus Logo
20:00 - 11:45
SOU
-
PHL
20h 45m
1 stop
£804Aer Lingus
Sat, 10 Oct - Sun, 11 Oct
KLM Logo
13:15 - 08:45
PHL
-
SOU
14h 30m
2 stops
KLM Logo
17:20 - 16:32
SOU
-
PHL
28h 12m
2 stops
£821KLM
Tue, 25 Aug - Mon, 7 Sep
KLM Logo
13:15 - 08:45
PHL
-
SOU
14h 30m
2 stops
KLM Logo
17:20 - 16:32
SOU
-
PHL
28h 12m
2 stops
£823KLM
Tue, 25 Aug - Mon, 7 Sep
Aer Lingus Logo
20:25 - 19:30
PHL
-
SOU
18h 05m
1 stop
Aer Lingus Logo
09:15 - 18:55
SOU
-
PHL
14h 40m
1 stop
£838Aer Lingus
Tue, 4 Aug - Tue, 11 Aug
KLM Logo
13:15 - 08:45
PHL
-
SOU
14h 30m
2 stops
KLM Logo
18:05 - 16:33
SOU
-
PHL
27h 28m
2 stops
£839KLM
Tue, 4 Aug - Tue, 11 Aug

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British Airways flights from Philadelphia to Southampton

Our best British Airways deals on Philadelphia to Southampton flight tickets
British Airways
16 Nov
PHL17:30Philadelphia
10h 10m
1 stop
SOU08:40Southampton Eastleigh
18 Nov
SOU15:15Southampton Eastleigh
27h 40m
1 stop
PHL13:55Philadelphia
£3,348
British Airways
16 Nov
PHL17:30Philadelphia
10h 10m
1 stop
SOU08:40Southampton Eastleigh
18 Nov
SOU15:15Southampton Eastleigh
27h 40m
1 stop
PHL13:55Philadelphia
£3,350
British Airways
16 Nov
PHL17:30Philadelphia
10h 10m
1 stop
SOU08:40Southampton Eastleigh
18 Nov
SOU15:15Southampton Eastleigh
27h 40m
1 stop
PHL13:55Philadelphia
£3,351

Delta flights from Philadelphia to Southampton

Our best Delta deals on Philadelphia to Southampton flight tickets
Delta
27 Jun
PHL15:22Philadelphia
20h 28m
2 stops
SOU16:50Southampton Eastleigh
10 Jul
SOU09:15Southampton Eastleigh
17h 52m
2 stops
PHL22:07Philadelphia
£953
Delta
27 Jun
PHL15:22Philadelphia
20h 28m
2 stops
SOU16:50Southampton Eastleigh
10 Jul
SOU09:15Southampton Eastleigh
17h 52m
2 stops
PHL22:07Philadelphia
£1,141
Delta
27 Jun
PHL17:06Philadelphia
18h 44m
2 stops
SOU16:50Southampton Eastleigh
10 Jul
SOU09:15Southampton Eastleigh
17h 52m
2 stops
PHL22:07Philadelphia
£1,143

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 22 June 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

Thu 24/9

20:25-19:30

1 stop18h 05m

Southampton Eastleigh

Mon 5/10

09:20-18:55

1 stop14h 35m

£738

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Thu 24/9

13:51-08:40

2 stops13h 49m

Southampton Eastleigh

Mon 5/10

20:00-11:45

1 stop20h 45m

£758

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Fri 25/9

18:50-16:50

1 stop17h 00m

Southampton Eastleigh

Sat 3/10

09:20-09:43

2 stops29h 23m

£767

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Thu 24/9

13:51-08:40

2 stops13h 49m

Southampton Eastleigh

Mon 5/10

15:15-11:45

2 stops25h 30m

£792

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Fri 25/9

10:42-08:40

2 stops16h 58m

Southampton Eastleigh

Sat 3/10

09:20-09:43

2 stops29h 23m

£803

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sat 10/10

13:53-08:35

2 stops13h 42m

Southampton Eastleigh

Sun 11/10

20:00-11:45

1 stop20h 45m

£804

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 25/8

13:15-08:45

2 stops14h 30m

Southampton Eastleigh

Mon 7/9

17:20-16:32

2 stops28h 12m

£821

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 25/8

13:15-08:45

2 stops14h 30m

Southampton Eastleigh

Mon 7/9

17:20-16:32

2 stops28h 12m

£823

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 4/8

20:25-19:30

1 stop18h 05m

Southampton Eastleigh

Tue 11/8

09:15-18:55

1 stop14h 40m

£838

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 4/8

13:15-08:45

2 stops14h 30m

Southampton Eastleigh

Tue 11/8

18:05-16:33

2 stops27h 28m

£839

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?

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 36% 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 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?

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