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Cheap flights from Philadelphia to London from £289

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 21/9. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Philadelphia to London

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
16:20 - 19:30PHL  Philadelphia-SOU Southampton Eastleigh
22h 10m2 stops Toronto Pearson Intl Dublin
Multiple Airlines Logo
20:00 - 15:41SOU  Southampton Eastleigh-PHL Philadelphia
24h 41m2 stops Dublin Toronto Pearson Intl
£823Multiple Airlines
Thu, 24 Sep - Thu, 1 Oct
Multiple Airlines Logo
16:20 - 19:30PHL  Philadelphia-SOU Southampton Eastleigh
22h 10m2 stops Toronto Pearson Intl Dublin
Multiple Airlines Logo
20:00 - 15:41SOU  Southampton Eastleigh-PHL Philadelphia
24h 41m2 stops Dublin Toronto Pearson Intl
£832Multiple Airlines
Thu, 24 Sep - Thu, 1 Oct
KLM Logo
13:15 - 08:45PHL  Philadelphia-SOU Southampton Eastleigh
14h 30m2 stops Boston Logan Intl Amsterdam Schiphol
KLM Logo
17:20 - 16:32SOU  Southampton Eastleigh-PHL Philadelphia
28h 12m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County
£848KLM
Tue, 25 Aug - Mon, 7 Sep
Multiple Airlines Logo
16:20 - 19:30PHL  Philadelphia-SOU Southampton Eastleigh
22h 10m2 stops Toronto Pearson Intl Dublin
Multiple Airlines Logo
17:20 - 15:41SOU  Southampton Eastleigh-PHL Philadelphia
27h 21m3 stops Amsterdam Schiphol Dublin Toronto Pearson Intl
£860Multiple Airlines
Thu, 24 Sep - Thu, 1 Oct
Aer Lingus Logo
18:30 - 16:50PHL  Philadelphia-SOU Southampton Eastleigh
17h 20m1 stop Dublin
Aer Lingus Logo
09:20 - 09:43SOU  Southampton Eastleigh-PHL Philadelphia
29h 23m2 stops Dublin Toronto Pearson Intl
£866Aer Lingus
Fri, 25 Sep - Sat, 3 Oct
Aer Lingus Logo
10:42 - 08:40PHL  Philadelphia-SOU Southampton Eastleigh
16h 58m2 stops Boston Logan Intl Dublin
Aer Lingus Logo
09:20 - 07:58SOU  Southampton Eastleigh-PHL Philadelphia
27h 38m2 stops Dublin Toronto Pearson Intl
£869Aer Lingus
Fri, 25 Sep - Sat, 3 Oct
Aer Lingus Logo
20:25 - 19:30PHL  Philadelphia-SOU Southampton Eastleigh
18h 05m1 stop Dublin
Aer Lingus Logo
09:20 - 18:55SOU  Southampton Eastleigh-PHL Philadelphia
14h 35m1 stop Dublin
£892Aer Lingus
Tue, 25 Aug - Mon, 7 Sep
Aer Lingus Logo
20:25 - 19:30PHL  Philadelphia-SOU Southampton Eastleigh
18h 05m1 stop Dublin
Aer Lingus Logo
09:20 - 18:55SOU  Southampton Eastleigh-PHL Philadelphia
14h 35m1 stop Dublin
£893Aer Lingus
Thu, 24 Sep - Thu, 1 Oct
Multiple Airlines Logo
10:50 - 16:50PHL  Philadelphia-SOU Southampton Eastleigh
25h 00m2 stops Toronto Pearson Intl Dublin
Multiple Airlines Logo
20:00 - 14:47SOU  Southampton Eastleigh-PHL Philadelphia
23h 47m2 stops Dublin Montreal Pierre Elliott Trudeau Intl
£900Multiple Airlines
Tue, 1 Sep - Mon, 7 Sep
Aer Lingus Logo
20:25 - 19:30PHL  Philadelphia-SOU Southampton Eastleigh
18h 05m1 stop Dublin
Aer Lingus Logo
09:20 - 18:55SOU  Southampton Eastleigh-PHL Philadelphia
14h 35m1 stop Dublin
£901Aer Lingus
Tue, 1 Sep - Mon, 7 Sep

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Aer Lingus flights from Philadelphia to Southampton

Our best Aer Lingus deals on Philadelphia to Southampton flight tickets
Aer Lingus
25 Sept
PHL18:30Philadelphia
17h 20m
1 stop
SOU16:50Southampton Eastleigh
3 Oct
SOU09:20Southampton Eastleigh
29h 23m
2 stops
PHL09:43Philadelphia
£866
Aer Lingus
25 Sept
PHL10:42Philadelphia
16h 58m
2 stops
SOU08:40Southampton Eastleigh
3 Oct
SOU09:20Southampton Eastleigh
27h 38m
2 stops
PHL07:58Philadelphia
£869
Aer Lingus
25 Aug
PHL20:25Philadelphia
18h 05m
1 stop
SOU19:30Southampton Eastleigh
7 Sept
SOU09:20Southampton Eastleigh
14h 35m
1 stop
PHL18:55Philadelphia
£892

British Airways flights from Philadelphia to Southampton

Our best British Airways deals on Philadelphia to Southampton flight tickets
British Airways
16 Dec
PHL17:30Philadelphia
18h 05m
1 stop
SOU16:35Southampton Eastleigh
26 Dec
SOU19:55Southampton Eastleigh
24h 20m
1 stop
PHL15:15Philadelphia
£3,674
British Airways
21 Aug
PHL20:25Philadelphia
15h 25m
1 stop
SOU16:50Southampton Eastleigh
26 Aug
SOU15:00Southampton Eastleigh
27h 40m
1 stop
PHL13:40Philadelphia
£3,676
British Airways
16 Dec
PHL19:50Philadelphia
18h 35m
2 stops
SOU19:25Southampton Eastleigh
26 Dec
SOU09:20Southampton Eastleigh
11h 40m
1 stop
PHL16:00Philadelphia
£3,689

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 11 August 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 Philadelphia - SOU Southampton Eastleigh

PHLSOU

Philadelphia

Thu 24/9

16:20-19:30

2 stops22h 10m

Southampton Eastleigh

Thu 1/10

20:00-15:41

2 stops24h 41m

£823

PhiladelphiaSouthampton

PHL Philadelphia - SOU Southampton Eastleigh

PHLSOU

Philadelphia

Thu 24/9

16:20-19:30

2 stops22h 10m

Southampton Eastleigh

Thu 1/10

20:00-15:41

2 stops24h 41m

£832

PhiladelphiaSouthampton

PHL Philadelphia - SOU Southampton Eastleigh

PHLSOU

Philadelphia

Tue 25/8

13:15-08:45

2 stops14h 30m

Southampton Eastleigh

Mon 7/9

17:20-16:32

2 stops28h 12m

£848

PhiladelphiaSouthampton

PHL Philadelphia - SOU Southampton Eastleigh

PHLSOU

Philadelphia

Thu 24/9

16:20-19:30

2 stops22h 10m

Southampton Eastleigh

Thu 1/10

17:20-15:41

3 stops27h 21m

£860

PhiladelphiaSouthampton

PHL Philadelphia - SOU Southampton Eastleigh

PHLSOU

Philadelphia

Fri 25/9

18:30-16:50

1 stop17h 20m

Southampton Eastleigh

Sat 3/10

09:20-09:43

2 stops29h 23m

£866

PhiladelphiaSouthampton

PHL Philadelphia - SOU Southampton Eastleigh

PHLSOU

Philadelphia

Fri 25/9

10:42-08:40

2 stops16h 58m

Southampton Eastleigh

Sat 3/10

09:20-07:58

2 stops27h 38m

£869
Fastest return journey

PhiladelphiaSouthampton

PHL Philadelphia - SOU Southampton Eastleigh

PHLSOU

Philadelphia

Tue 25/8

20:25-19:30

1 stop18h 05m

Southampton Eastleigh

Mon 7/9

09:20-18:55

1 stop14h 35m

£892

PhiladelphiaSouthampton

PHL Philadelphia - SOU Southampton Eastleigh

PHLSOU

Philadelphia

Thu 24/9

20:25-19:30

1 stop18h 05m

Southampton Eastleigh

Thu 1/10

09:20-18:55

1 stop14h 35m

£893

PhiladelphiaSouthampton

PHL Philadelphia - SOU Southampton Eastleigh

PHLSOU

Philadelphia

Tue 1/9

10:50-16:50

2 stops25h 00m

Southampton Eastleigh

Mon 7/9

20:00-14:47

2 stops23h 47m

£900

PhiladelphiaSouthampton

PHL Philadelphia - SOU Southampton Eastleigh

PHLSOU

Philadelphia

Tue 1/9

20:25-19:30

1 stop18h 05m

Southampton Eastleigh

Mon 7/9

09:20-18:55

1 stop14h 35m

£901

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 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 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

14h 30m

Direct flights

None
The fastest flight from Philadelphia to Southampton takes 14h 30m
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 14h 30m.

  • 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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