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Cheap flights from Philadelphia to London from £409

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 17/3. 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
12:29 - 08:50
PHL
-
SOU
15h 21m
2 stops
KLM Logo
17:35 - 16:30
SOU
-
PHL
27h 55m
2 stops
£568KLM
Mon, 2 Feb - Mon, 9 Feb
Aer Lingus Logo
21:25 - 11:55
PHL
-
SOU
9h 30m
1 stop
Aer Lingus Logo
16:05 - 14:05
SOU
-
PHL
27h 00m
1 stop
£673Aer Lingus
Mon, 2 Feb - Mon, 9 Feb
Multiple Airlines Logo
21:25 - 11:55
PHL
-
SOU
9h 30m
1 stop
Multiple Airlines Logo
16:05 - 15:35
SOU
-
PHL
28h 30m
2 stops
£688Multiple Airlines
Mon, 2 Feb - Mon, 9 Feb
Aer Lingus Logo
20:25 - 19:30
PHL
-
SOU
18h 05m
1 stop
Aer Lingus Logo
09:10 - 21:40
SOU
-
PHL
17h 30m
2 stops
£702Aer Lingus
Thu, 16 Apr - Tue, 28 Apr
Aer Lingus Logo
20:25 - 16:35
PHL
-
SOU
15h 10m
1 stop
Aer Lingus Logo
20:00 - 18:55
SOU
-
PHL
27h 55m
1 stop
£702Aer Lingus
Thu, 16 Apr - Tue, 28 Apr
Delta Logo
19:31 - 16:50
PHL
-
SOU
16h 19m
2 stops
Delta Logo
09:05 - 00:51
SOU
-
PHL
20h 46m
2 stops
£708Delta
Thu, 16 Apr - Tue, 28 Apr
Delta Logo
09:40 - 08:35
PHL
-
SOU
17h 55m
2 stops
Delta Logo
09:15 - 00:27
SOU
-
PHL
20h 12m
2 stops
£827Delta
Tue, 30 Jun - Thu, 9 Jul
Delta Logo
17:20 - 16:50
PHL
-
SOU
18h 30m
2 stops
Delta Logo
18:05 - 22:37
SOU
-
PHL
33h 32m
2 stops
£870Delta
Mon, 29 Jun - Tue, 7 Jul
Delta Logo
06:00 - 08:35
PHL
-
SOU
21h 35m
2 stops
Delta Logo
09:15 - 00:27
SOU
-
PHL
20h 12m
2 stops
£879Delta
Thu, 2 Jul - Thu, 9 Jul
Aer Lingus Logo
20:25 - 08:40
PHL
-
SOU
31h 15m
2 stops
Aer Lingus Logo
09:10 - 18:55
SOU
-
PHL
14h 45m
1 stop
£883Aer Lingus
Sat, 27 Jun - Fri, 10 Jul

Aer Lingus flights from Philadelphia to Southampton

Our best Aer Lingus deals on Philadelphia to Southampton flight tickets
Aer Lingus
2 Feb
PHL21:25Philadelphia
9h 30m
1 stop
SOU11:55Southampton Eastleigh
9 Feb
SOU16:05Southampton Eastleigh
27h 00m
1 stop
PHL14:05Philadelphia
£673
Aer Lingus
16 Apr
PHL20:25Philadelphia
18h 05m
1 stop
SOU19:30Southampton Eastleigh
28 Apr
SOU09:10Southampton Eastleigh
17h 30m
2 stops
PHL21:40Philadelphia
£702
Aer Lingus
16 Apr
PHL20:25Philadelphia
15h 10m
1 stop
SOU16:35Southampton Eastleigh
28 Apr
SOU20:00Southampton Eastleigh
27h 55m
1 stop
PHL18:55Philadelphia
£702

Delta flights from Philadelphia to Southampton

Our best Delta deals on Philadelphia to Southampton flight tickets
Delta
16 Apr
PHL19:31Philadelphia
16h 19m
2 stops
SOU16:50Southampton Eastleigh
28 Apr
SOU09:05Southampton Eastleigh
20h 46m
2 stops
PHL00:51Philadelphia
£708
Delta
30 Jun
PHL06:15Philadelphia
29h 35m
2 stops
SOU16:50Southampton Eastleigh
7 Jul
SOU18:05Southampton Eastleigh
33h 32m
2 stops
PHL22:37Philadelphia
£827
Delta
29 Jun
PHL17:20Philadelphia
18h 30m
2 stops
SOU16:50Southampton Eastleigh
7 Jul
SOU18:05Southampton Eastleigh
33h 32m
2 stops
PHL22:37Philadelphia
£870

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 16 January 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

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Mon 2/2

12:29-08:50

2 stops15h 21m

Southampton Eastleigh

Mon 9/2

17:35-16:30

2 stops27h 55m

£568

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Mon 2/2

21:25-11:55

1 stop9h 30m

Southampton Eastleigh

Mon 9/2

16:05-14:05

1 stop27h 00m

£673

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Mon 2/2

21:25-11:55

1 stop9h 30m

Southampton Eastleigh

Mon 9/2

16:05-15:35

2 stops28h 30m

£688

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Thu 16/4

20:25-19:30

1 stop18h 05m

Southampton Eastleigh

Tue 28/4

09:10-21:40

2 stops17h 30m

£702

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Thu 16/4

20:25-16:35

1 stop15h 10m

Southampton Eastleigh

Tue 28/4

20:00-18:55

1 stop27h 55m

£702

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Thu 16/4

19:31-16:50

2 stops16h 19m

Southampton Eastleigh

Tue 28/4

09:05-00:51

2 stops20h 46m

£708

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 30/6

09:40-08:35

2 stops17h 55m

Southampton Eastleigh

Thu 9/7

09:15-00:27

2 stops20h 12m

£827

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Mon 29/6

17:20-16:50

2 stops18h 30m

Southampton Eastleigh

Tue 7/7

18:05-22:37

2 stops33h 32m

£870

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Thu 2/7

06:00-08:35

2 stops21h 35m

Southampton Eastleigh

Thu 9/7

09:15-00:27

2 stops20h 12m

£879

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sat 27/6

20:25-08:40

2 stops31h 15m

Southampton Eastleigh

Fri 10/7

09:10-18:55

1 stop14h 45m

£883

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?

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 39% 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

9h 30m

Direct flights

None
The fastest flight from Philadelphia to Southampton takes 9h 30m
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 9h 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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