£436 Cheap Flights from Southampton (SOU) to Philadelphia (PHL)

View £436 flight on Wed, 2 Sept 2026Opens in a new window

Popular airlines from Southampton (SOU) to Philadelphia International Airport (PHL)

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Cheap Flights from Southampton (SOU) to Philadelphia (PHL)

Prices were available within the past 7 days and start at £436 for one-way flights and £661 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Wed, 2 Sept - Wed, 16 Sept
SOU
Southampton
PHL
Philadelphia
£661 Return, found 6 days ago
£661
Return
found 6 days ago
Select Aer Lingus flight, departing Wed, 2 Sept from Southampton to Philadelphia, returning Wed, 16 Sept, priced at £661 found 6 days ago
Aer Lingus
Mon, 8 Jun - Sun, 14 Jun
SOU
Southampton
PHL
Philadelphia
£697 Return, found 20 hours ago
£697
Return
found 20 hours ago
Select Aer Lingus flight, departing Mon, 8 Jun from Southampton to Philadelphia, returning Sun, 14 Jun, priced at £697 found 20 hours ago
Aer Lingus
Mon, 8 Jun - Sun, 14 Jun
SOU
Southampton
PHL
Philadelphia
£702 Return, found 20 hours ago
£702
Return
found 20 hours ago
Select Aer Lingus flight, departing Mon, 8 Jun from Southampton to Philadelphia, returning Sun, 14 Jun, priced at £702 found 20 hours ago
Aer Lingus
Wed, 2 Sept - Wed, 16 Sept
SOU
Southampton
PHL
Philadelphia
£740 Return, found 6 days ago
£740
Return
found 6 days ago
Select Aer Lingus flight, departing Wed, 2 Sept from Southampton to Philadelphia, returning Wed, 16 Sept, priced at £740 found 6 days ago
Virgin Atlantic
Wed, 2 Sept - Wed, 16 Sept
SOU
Southampton
PHL
Philadelphia
£743 Return, found 6 days ago
£743
Return
found 6 days ago
Select Virgin Atlantic flight, departing Wed, 2 Sept from Southampton to Philadelphia, returning Wed, 16 Sept, priced at £743 found 6 days ago
Virgin Atlantic
Wed, 2 Sept - Wed, 16 Sept
SOU
Southampton
PHL
Philadelphia
£743 Return, found 6 days ago
£743
Return
found 6 days ago
Select Virgin Atlantic flight, departing Wed, 2 Sept from Southampton to Philadelphia, returning Wed, 16 Sept, priced at £743 found 6 days ago
Virgin Atlantic
Wed, 2 Sept - Wed, 16 Sept
SOU
Southampton
PHL
Philadelphia
£759 Return, found 6 days ago
£759
Return
found 6 days ago
Select Virgin Atlantic flight, departing Wed, 2 Sept from Southampton to Philadelphia, returning Wed, 16 Sept, priced at £759 found 6 days ago
Virgin Atlantic
Wed, 2 Sept - Wed, 16 Sept
SOU
Southampton
PHL
Philadelphia
£759 Return, found 6 days ago
£759
Return
found 6 days ago
Select Virgin Atlantic flight, departing Wed, 2 Sept from Southampton to Philadelphia, returning Wed, 16 Sept, priced at £759 found 6 days ago
KLM
Wed, 2 Sept - Wed, 16 Sept
SOU
Southampton
PHL
Philadelphia
£774 Return, found 6 days ago
£774
Return
found 6 days ago
Select KLM flight, departing Wed, 2 Sept from Southampton to Philadelphia, returning Wed, 16 Sept, priced at £774 found 6 days ago
British Airways
Wed, 2 Sept - Wed, 16 Sept
SOU
Southampton
PHL
Philadelphia
£800 Return, found 6 days ago
£800
Return
found 6 days ago
Select British Airways flight, departing Wed, 2 Sept from Southampton to Philadelphia, returning Wed, 16 Sept, priced at £800 found 6 days ago

Frequently asked questions

How do I find cheap flights from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.)?
To find a cheap flight from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.)?
There are approximately 7 connecting flights per day from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.) (PHL). Some common connection points include (DUB), Schiphol (AMS), and George Best Belfast City (BHD).
What is the earliest flight from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.)?
The earliest flight from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.) (PHL) typically departs at approximately 6:50 AM local time. This is a seasonal service active in May, operated by Loganair and British Airways. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.)?
You'll typically find the most flights from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.) on a Tuesday, with around 18 flights available. This gives you a good selection of options for your journey. While specific airline names aren't available, you'll find several flight options to choose from.
What are the most popular departure times for flights from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.)?
The most popular departure times for flights from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.) are in the evening, from 6pm to 9pm. This accounts for around 49% of total traffic. Many major carriers, including British Airways, Aer Lingus and American Airlines, offer flights during this window. This timing works well because you can make the most of your day before your evening flight, and you'll arrive in Philadelphia ready to start your trip.
How long does it take to fly from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.)?
A flight from SOU to PHL with a layover takes around 22 hours 50 minutes, with the route covering approximately 3,510 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.)?
Select the "Business class" and "First class" filters when looking for SOU to PHL flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.) flight with Expedia?
It's easy to earn miles on a Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Philadelphia from SOU (SOU)?
If you're planning to travel to Philadelphia from SOU (SOU), you can fly into Philadelphia Intl. (PHL) Some flights may connect through major hubs like Schiphol (AMS), DUB (DUB), George Best Belfast City (BHD) before reaching Philadelphia. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.) at the last minute?
Typically, booking a last minute flight from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.) flight and hotel package?
Securing a Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.)?
If you booked your Southampton (SOU) to Philadelphia, PA (PHL-Philadelphia Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Southampton
Destination airport
Philadelphia Intl.
Airlines serving
Aer Lingus, British Airways, KLM
Return price
£661
Distance
5614 km

Book with confidence

Compare flights from Southampton to Philadelphia easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Southampton to Philadelphia. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Philadelphia Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Southampton to Philadelphia Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Southampton (SOU) to Philadelphia Intl. (PHL)

The easiest way to view the best deals on flights from Southampton to Philadelphia today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Southampton to Philadelphia Intl. start at just £661 and range up to £1,621.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Southampton and Philadelphia
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Southampton to Philadelphia flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Southampton to Philadelphia Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Southampton to Philadelphia easily and book with confidence

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*Available to Expedia members.