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Cheap flights from Philadelphia to London from £647

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 16/6. 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
12:33 - 08:45
PHL
-
SOU
15h 12m
2 stops
KLM Logo
17:20 - 17:14
SOU
-
PHL
28h 54m
2 stops
£748KLM
Tue, 25 Aug - Mon, 7 Sep
KLM Logo
12:33 - 08:45
PHL
-
SOU
15h 12m
2 stops
KLM Logo
17:20 - 17:14
SOU
-
PHL
28h 54m
2 stops
£750KLM
Tue, 25 Aug - Mon, 7 Sep
Delta Logo
06:25 - 08:45
PHL
-
SOU
21h 20m
2 stops
Delta Logo
18:05 - 18:14
SOU
-
PHL
29h 09m
2 stops
£771Delta
Sun, 2 Aug - Thu, 13 Aug
Delta Logo
16:55 - 08:45
PHL
-
SOU
34h 50m
2 stops
Delta Logo
18:05 - 22:16
SOU
-
PHL
33h 11m
2 stops
£775Delta
Sat, 1 Aug - Tue, 11 Aug
Delta Logo
05:30 - 08:45
PHL
-
SOU
22h 15m
2 stops
Delta Logo
09:05 - 19:58
SOU
-
PHL
15h 53m
2 stops
£786Delta
Fri, 25 Sep - Wed, 30 Sep
Multiple Airlines Logo
13:53 - 08:05
PHL
-
SOU
13h 12m
2 stops
Multiple Airlines Logo
09:20 - 07:59
SOU
-
PHL
27h 39m
2 stops
£786Multiple Airlines
Tue, 21 Jul - Sat, 1 Aug
Multiple Airlines Logo
20:25 - 19:30
PHL
-
SOU
18h 05m
1 stop
Multiple Airlines Logo
09:20 - 09:56
SOU
-
PHL
29h 36m
2 stops
£789Multiple Airlines
Tue, 21 Jul - Sat, 1 Aug
Delta Logo
13:15 - 08:45
PHL
-
SOU
14h 30m
2 stops
Delta Logo
18:05 - 18:14
SOU
-
PHL
29h 09m
2 stops
£808Delta
Thu, 6 Aug - Thu, 13 Aug
Delta Logo
05:30 - 08:45
PHL
-
SOU
22h 15m
2 stops
Delta Logo
17:20 - 22:37
SOU
-
PHL
34h 17m
2 stops
£823Delta
Fri, 25 Sep - Sun, 27 Sep
Delta Logo
08:05 - 08:45
PHL
-
SOU
19h 40m
2 stops
Delta Logo
18:05 - 19:15
SOU
-
PHL
30h 10m
2 stops
£827Delta
Sun, 2 Aug - Tue, 11 Aug

Delta flights from Philadelphia to Southampton

Our best Delta deals on Philadelphia to Southampton flight tickets
Delta
2 Aug
PHL05:15Philadelphia
22h 30m
2 stops
SOU08:45Southampton Eastleigh
12 Aug
SOU18:05Southampton Eastleigh
36h 07m
2 stops
PHL01:12Philadelphia
£771
Delta
1 Aug
PHL16:55Philadelphia
34h 50m
2 stops
SOU08:45Southampton Eastleigh
11 Aug
SOU18:05Southampton Eastleigh
33h 11m
2 stops
PHL22:16Philadelphia
£775
Delta
25 Sept
PHL05:30Philadelphia
22h 15m
2 stops
SOU08:45Southampton Eastleigh
30 Sept
SOU09:05Southampton Eastleigh
15h 53m
2 stops
PHL19:58Philadelphia
£786

Aer Lingus flights from Philadelphia to Southampton

Our best Aer Lingus deals on Philadelphia to Southampton flight tickets
Aer Lingus
25 Aug
PHL20:25Philadelphia
15h 25m
1 stop
SOU16:50Southampton Eastleigh
7 Sept
SOU09:20Southampton Eastleigh
14h 35m
1 stop
PHL18:55Philadelphia
£868
Aer Lingus
8 Aug
PHL20:25Philadelphia
18h 05m
1 stop
SOU19:30Southampton Eastleigh
19 Aug
SOU09:20Southampton Eastleigh
11h 50m
1 stop
PHL16:10Philadelphia
£881
Aer Lingus
8 Aug
PHL20:25Philadelphia
18h 05m
1 stop
SOU19:30Southampton Eastleigh
19 Aug
SOU09:20Southampton Eastleigh
15h 40m
2 stops
PHL20:00Philadelphia
£897

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 19 May 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

12:33-08:45

2 stops15h 12m

Southampton Eastleigh

Mon 7/9

17:20-17:14

2 stops28h 54m

£748

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 25/8

12:33-08:45

2 stops15h 12m

Southampton Eastleigh

Mon 7/9

17:20-17:14

2 stops28h 54m

£750

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sun 2/8

06:25-08:45

2 stops21h 20m

Southampton Eastleigh

Thu 13/8

18:05-18:14

2 stops29h 09m

£771

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sat 1/8

16:55-08:45

2 stops34h 50m

Southampton Eastleigh

Tue 11/8

18:05-22:16

2 stops33h 11m

£775
Fastest return journey

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Fri 25/9

05:30-08:45

2 stops22h 15m

Southampton Eastleigh

Wed 30/9

09:05-19:58

2 stops15h 53m

£786

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 21/7

13:53-08:05

2 stops13h 12m

Southampton Eastleigh

Sat 1/8

09:20-07:59

2 stops27h 39m

£786

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Tue 21/7

20:25-19:30

1 stop18h 05m

Southampton Eastleigh

Sat 1/8

09:20-09:56

2 stops29h 36m

£789

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Thu 6/8

13:15-08:45

2 stops14h 30m

Southampton Eastleigh

Thu 13/8

18:05-18:14

2 stops29h 09m

£808

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Fri 25/9

05:30-08:45

2 stops22h 15m

Southampton Eastleigh

Sun 27/9

17:20-22:37

2 stops34h 17m

£823

PhiladelphiaSouthampton

PHL - SOU

PHLSOU

Philadelphia

Sun 2/8

08:05-08:45

2 stops19h 40m

Southampton Eastleigh

Tue 11/8

18:05-19:15

2 stops30h 10m

£827

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 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

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.

An easier way to manage your Southampton trip

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