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Cheap flights from Philadelphia to London from £312

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 9/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap return flights

Enter your travel dates to find the best prices.
Delta Logo
12:37 - 17:00PHL-SOU
23h 23m2 stops
Delta Logo
08:40 - 21:40SOU-PHL
18h 00m2 stops
£653Delta
Find Deal
Fri, 5 Dec - Tue, 9 Dec
Delta Logo
08:00 - 08:50PHL-SOU
19h 50m2 stops
Delta Logo
17:30 - 16:32SOU-PHL
28h 02m2 stops
£715Delta
Find Deal
Fri, 5 Dec - Tue, 9 Dec
Aer Lingus Logo
20:25 - 08:40PHL-SOU
31h 15m2 stops
Aer Lingus Logo
09:10 - 19:00SOU-PHL
14h 50m1 stop
£845Aer Lingus
Find Deal
Sat, 16 May - Sun, 24 May
Aer Lingus Logo
20:25 - 08:40PHL-SOU
31h 15m2 stops
Aer Lingus Logo
09:10 - 19:30SOU-PHL
15h 20m2 stops
£848Aer Lingus
Find Deal
Sat, 16 May - Sun, 24 May
Multiple Airlines Logo
21:15 - 19:40PHL-SOU
17h 25m1 stop
Multiple Airlines Logo
09:30 - 15:35SOU-PHL
35h 05m2 stops
£894Multiple Airlines
Find Deal
Sat, 3 Jan - Sat, 10 Jan
Aer Lingus Logo
18:00 - 19:30PHL-SOU
20h 30m1 stop
Aer Lingus Logo
09:10 - 19:00SOU-PHL
14h 50m1 stop
£904Aer Lingus
Find Deal
Sat, 16 May - Sun, 24 May
British Airways Logo
17:30 - 08:45PHL-SOU
10h 15m1 stop
British Airways Logo
14:35 - 16:15SOU-PHL
30h 40m2 stops
£1,115British Airways
Find Deal
Fri, 5 Dec - Tue, 9 Dec
British Airways Logo
20:30 - 19:30PHL-SOU
18h 00m1 stop
British Airways Logo
18:20 - 16:40SOU-PHL
27h 20m2 stops
£1,123British Airways
Find Deal
Wed, 29 Apr - Mon, 4 May
Multiple Airlines Logo
14:30 - 15:35PHL-SOU
20h 05m2 stops
Multiple Airlines Logo
17:15 - 14:05SOU-PHL
25h 50m2 stops
£1,140Multiple Airlines
Find Deal
Sat, 3 Jan - Sat, 10 Jan
Multiple Airlines Logo
07:50 - 19:40PHL-SOU
30h 50m3 stops
Multiple Airlines Logo
09:30 - 21:20SOU-PHL
40h 50m3 stops
£1,338Multiple Airlines
Find Deal
Sat, 3 Jan - Sat, 10 Jan

Aer Lingus flights from Philadelphia to Southampton

Our best Aer Lingus deals on Philadelphia to Southampton flight tickets
Aer Lingus
16 May
PHL20:25Philadelphia
31h 15m
2 stops
SOU08:40Southampton Eastleigh
24 May
SOU09:10Southampton Eastleigh
14h 50m
1 stop
PHL19:00Philadelphia
£845
Find similar
Aer Lingus
16 May
PHL20:25Philadelphia
31h 15m
2 stops
SOU08:40Southampton Eastleigh
24 May
SOU09:10Southampton Eastleigh
15h 20m
2 stops
PHL19:30Philadelphia
£848
Find similar
Aer Lingus
16 May
PHL20:25Philadelphia
31h 15m
2 stops
SOU08:40Southampton Eastleigh
24 May
SOU09:10Southampton Eastleigh
15h 20m
2 stops
PHL19:30Philadelphia
£864
Find similar

Delta flights from Philadelphia to Southampton

Our best Delta deals on Philadelphia to Southampton flight tickets
Delta
5 Dec
PHL12:37Philadelphia
23h 23m
2 stops
SOU17:00Southampton Eastleigh
9 Dec
SOU08:40Southampton Eastleigh
18h 00m
2 stops
PHL21:40Philadelphia
£653
Find similar
Delta
23 Jan
PHL06:15Philadelphia
21h 30m
2 stops
SOU08:45Southampton Eastleigh
27 Jan
SOU09:25Southampton Eastleigh
18h 25m
2 stops
PHL22:50Philadelphia
£688
Find similar
Delta
5 Dec
PHL08:00Philadelphia
19h 50m
2 stops
SOU08:50Southampton Eastleigh
9 Dec
SOU17:30Southampton Eastleigh
28h 02m
2 stops
PHL16:32Philadelphia
£715
Find similar

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 21 November 2025.
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

Fri 5/12

12:37-17:00

2 stops23h 23m

Southampton Eastleigh

Tue 9/12

08:40-21:40

2 stops18h 00m

£653

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Fri 5/12

08:00-08:50

2 stops19h 50m

Southampton Eastleigh

Tue 9/12

17:30-16:32

2 stops28h 02m

£715

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sat 16/5

20:25-08:40

2 stops31h 15m

Southampton Eastleigh

Sun 24/5

09:10-19:00

1 stop14h 50m

£845

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sat 16/5

20:25-08:40

2 stops31h 15m

Southampton Eastleigh

Sun 24/5

09:10-19:30

2 stops15h 20m

£848

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sat 3/1

21:15-19:40

1 stop17h 25m

Southampton Eastleigh

Sat 10/1

09:30-15:35

2 stops35h 05m

£894

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sat 16/5

18:00-19:30

1 stop20h 30m

Southampton Eastleigh

Sun 24/5

09:10-19:00

1 stop14h 50m

£904

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Fri 5/12

17:30-08:45

1 stop10h 15m

Southampton Eastleigh

Tue 9/12

14:35-16:15

2 stops30h 40m

£1,115

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Wed 29/4

20:30-19:30

1 stop18h 00m

Southampton Eastleigh

Mon 4/5

18:20-16:40

2 stops27h 20m

£1,123

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sat 3/1

14:30-15:35

2 stops20h 05m

Southampton Eastleigh

Sat 10/1

17:15-14:05

2 stops25h 50m

£1,140

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sat 3/1

07:50-19:40

3 stops30h 50m

Southampton Eastleigh

Sat 10/1

09:30-21:20

3 stops40h 50m

£1,338

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 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 42% 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

Direct flights

None
There are no direct flights from Philadelphia to Southampton. There are no popular flight routes from Philadelphia to Southampton.
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  • 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 15m.

  • 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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