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Cheap flights from Philadelphia to London from £801

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to London departing on 25/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap return flights

Enter your travel dates to find the best prices.
KLM Logo
13:20 - 08:45
PHL
-
SOU
14h 25m
2 stops
KLM Logo
17:20 - 17:14
SOU
-
PHL
28h 54m
2 stops
£801KLM
Tue, 25 Aug - Mon, 7 Sep
KLM Logo
13:20 - 08:45
PHL
-
SOU
14h 25m
2 stops
KLM Logo
17:20 - 17:14
SOU
-
PHL
28h 54m
2 stops
£824KLM
Tue, 25 Aug - Mon, 7 Sep
KLM Logo
19:01 - 16:50
PHL
-
SOU
16h 49m
2 stops
KLM Logo
17:20 - 16:30
SOU
-
PHL
28h 10m
2 stops
£824KLM
Mon, 11 May - Mon, 18 May
Delta Logo
09:40 - 08:45
PHL
-
SOU
18h 05m
2 stops
Delta Logo
09:05 - 22:20
SOU
-
PHL
18h 15m
2 stops
£839Delta
Tue, 25 Aug - Mon, 7 Sep
Delta Logo
09:40 - 08:45
PHL
-
SOU
18h 05m
2 stops
Delta Logo
09:05 - 19:58
SOU
-
PHL
15h 53m
2 stops
£839Delta
Tue, 25 Aug - Mon, 7 Sep
Aer Lingus Logo
09:12 - 19:30
PHL
-
SOU
29h 18m
2 stops
Aer Lingus Logo
17:20 - 18:55
SOU
-
PHL
30h 35m
1 stop
£886Aer Lingus
Tue, 25 Aug - Mon, 7 Sep
Aer Lingus Logo
09:12 - 19:30
PHL
-
SOU
29h 18m
2 stops
Aer Lingus Logo
17:20 - 18:55
SOU
-
PHL
30h 35m
1 stop
£886Aer Lingus
Tue, 25 Aug - Mon, 7 Sep
Aer Lingus Logo
20:25 - 19:30
PHL
-
SOU
18h 05m
1 stop
Aer Lingus Logo
20:00 - 18:55
SOU
-
PHL
27h 55m
1 stop
£887Aer Lingus
Tue, 25 Aug - Mon, 7 Sep
Delta Logo
13:10 - 08:45
PHL
-
SOU
38h 35m
2 stops
Delta Logo
09:15 - 22:11
SOU
-
PHL
17h 56m
2 stops
£905Delta
Mon, 20 Jul - Tue, 28 Jul
Aer Lingus Logo
18:33 - 19:30
PHL
-
SOU
19h 57m
2 stops
Aer Lingus Logo
20:00 - 18:55
SOU
-
PHL
27h 55m
1 stop
£911Aer Lingus
Mon, 11 May - Mon, 18 May

KLM flights from Philadelphia to Southampton

Our best KLM deals on Philadelphia to Southampton flight tickets
KLM
25 Aug
PHL13:20Philadelphia
14h 25m
2 stops
SOU08:45Southampton Eastleigh
7 Sept
SOU17:20Southampton Eastleigh
28h 54m
2 stops
PHL17:14Philadelphia
£801
KLM
25 Aug
PHL13:20Philadelphia
14h 25m
2 stops
SOU08:45Southampton Eastleigh
7 Sept
SOU17:20Southampton Eastleigh
28h 54m
2 stops
PHL17:14Philadelphia
£824
KLM
11 May
PHL19:01Philadelphia
16h 49m
2 stops
SOU16:50Southampton Eastleigh
18 May
SOU17:20Southampton Eastleigh
28h 10m
2 stops
PHL16:30Philadelphia
£824

Delta flights from Philadelphia to Southampton

Our best Delta deals on Philadelphia to Southampton flight tickets
Delta
25 Aug
PHL09:40Philadelphia
18h 05m
2 stops
SOU08:45Southampton Eastleigh
7 Sept
SOU09:05Southampton Eastleigh
18h 15m
2 stops
PHL22:20Philadelphia
£839
Delta
25 Aug
PHL09:40Philadelphia
18h 05m
2 stops
SOU08:45Southampton Eastleigh
7 Sept
SOU09:05Southampton Eastleigh
15h 53m
2 stops
PHL19:58Philadelphia
£839
Delta
20 Jul
PHL13:10Philadelphia
38h 35m
2 stops
SOU08:45Southampton Eastleigh
28 Jul
SOU09:15Southampton Eastleigh
17h 56m
2 stops
PHL22:11Philadelphia
£905

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 31 March 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

13:20-08:45

2 stops14h 25m

Southampton Eastleigh

Mon 7/9

17:20-17:14

2 stops28h 54m

£801

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 25/8

13:20-08:45

2 stops14h 25m

Southampton Eastleigh

Mon 7/9

17:20-17:14

2 stops28h 54m

£824

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Mon 11/5

19:01-16:50

2 stops16h 49m

Southampton Eastleigh

Mon 18/5

17:20-16:30

2 stops28h 10m

£824

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 25/8

09:40-08:45

2 stops18h 05m

Southampton Eastleigh

Mon 7/9

09:05-22:20

2 stops18h 15m

£839
Fastest return journey

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 25/8

09:40-08:45

2 stops18h 05m

Southampton Eastleigh

Mon 7/9

09:05-19:58

2 stops15h 53m

£839

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 25/8

09:12-19:30

2 stops29h 18m

Southampton Eastleigh

Mon 7/9

17:20-18:55

1 stop30h 35m

£886

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 25/8

09:12-19:30

2 stops29h 18m

Southampton Eastleigh

Mon 7/9

17:20-18:55

1 stop30h 35m

£886

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 25/8

20:25-19:30

1 stop18h 05m

Southampton Eastleigh

Mon 7/9

20:00-18:55

1 stop27h 55m

£887

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Mon 20/7

13:10-08:45

2 stops38h 35m

Southampton Eastleigh

Tue 28/7

09:15-22:11

2 stops17h 56m

£905

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Mon 11/5

18:33-19:30

2 stops19h 57m

Southampton Eastleigh

Mon 18/5

20:00-18:55

1 stop27h 55m

£911

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
1
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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?

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 40% 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

17h 35m

Direct flights

None
The fastest flight from Philadelphia to Southampton takes 17h 35m
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 17h 35m.

  • 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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