$470 Cheap Flights from Washington (IAD) to Southampton (SOU)

View $470 flight on Thu, May 7, 2026Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Southampton (SOU)

Cheap Flights from Washington to Southampton (IAD-SOU)

Prices were available within the past 7 days and start at $470 for one-way flights and $692 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Mon, Nov 3 - Tue, Nov 18
IAD
Washington
SOU
Southampton
$692 Roundtrip, found 6 days ago
$692
Roundtrip
found 6 days ago
Select Aer Lingus flight, departing Mon, Nov 3 from Washington to Southampton, returning Tue, Nov 18, priced at $692 found 6 days ago
Aer Lingus
Sun, Nov 9 - Tue, Nov 18
IAD
Washington
SOU
Southampton
$719 Roundtrip, found 3 days ago
$719
Roundtrip
found 3 days ago
Select Aer Lingus flight, departing Sun, Nov 9 from Washington to Southampton, returning Tue, Nov 18, priced at $719 found 3 days ago
Aer Lingus
Wed, Nov 12 - Wed, Nov 26
IAD
Washington
SOU
Southampton
$747 Roundtrip, found 5 days ago
$747
Roundtrip
found 5 days ago
Select Aer Lingus flight, departing Wed, Nov 12 from Washington to Southampton, returning Wed, Nov 26, priced at $747 found 5 days ago
Aer Lingus
Wed, Nov 12 - Wed, Nov 26
IAD
Washington
SOU
Southampton
$759 Roundtrip, found 5 days ago
$759
Roundtrip
found 5 days ago
Select Aer Lingus flight, departing Wed, Nov 12 from Washington to Southampton, returning Wed, Nov 26, priced at $759 found 5 days ago
Delta
Fri, Nov 14 - Sun, Nov 16
IAD
Washington
SOU
Southampton
$760 Roundtrip, just found
$760
Roundtrip
just found
Select Delta flight, departing Fri, Nov 14 from Washington to Southampton, returning Sun, Nov 16, priced at $760 just found
Virgin Atlantic
Sat, Nov 15 - Sun, Nov 23
IAD
Washington
SOU
Southampton
$760 Roundtrip, just found
$760
Roundtrip
just found
Select Virgin Atlantic flight, departing Sat, Nov 15 from Washington to Southampton, returning Sun, Nov 23, priced at $760 just found
Virgin Atlantic
Fri, Nov 28 - Fri, Dec 5
IAD
Washington
SOU
Southampton
$761 Roundtrip, found 4 days ago
$761
Roundtrip
found 4 days ago
Select Virgin Atlantic flight, departing Fri, Nov 28 from Washington to Southampton, returning Fri, Dec 5, priced at $761 found 4 days ago
Virgin Atlantic
Thu, Nov 27 - Fri, Dec 5
IAD
Washington
SOU
Southampton
$766 Roundtrip, found 4 days ago
$766
Roundtrip
found 4 days ago
Select Virgin Atlantic flight, departing Thu, Nov 27 from Washington to Southampton, returning Fri, Dec 5, priced at $766 found 4 days ago
Virgin Atlantic
Sun, Jan 25 - Mon, Feb 23
IAD
Washington
SOU
Southampton
$769 Roundtrip, found 1 day ago
$769
Roundtrip
found 1 day ago
Select Virgin Atlantic flight, departing Sun, Jan 25 from Washington to Southampton, returning Mon, Feb 23, priced at $769 found 1 day ago
KLM
Tue, May 5 - Wed, May 13
IAD
Washington
SOU
Southampton
$810 Roundtrip, found 4 hours ago
$810
Roundtrip
found 4 hours ago
Select KLM flight, departing Tue, May 5 from Washington to Southampton, returning Wed, May 13, priced at $810 found 4 hours ago

Alternative airports near Southampton

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Southampton SOU. Cheapest and Closest option available. Average driving time to city center is 10 minutes. Flights from $760
SOU
Southampton
CheapestClosest
Average driving time to city center10 min
Flights from $760

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Southampton Airport (SOU) cost?
Secure a cheap one-way flight from $470 or cheap return flight from $692 from Washington Dulles Intl. Airport (IAD) to Southampton Airport (SOU) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Southampton Airport (SOU)?
The cheapest month to fly from IAD to SOU is November, when demand is low. Off-peak season is typically when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Southampton Airport (SOU)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll fly you from IAD to SOU. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Southampton Airport (SOU)?
Nonstop flights from Washington Dulles Intl. Airport (IAD) to Southampton Airport (SOU) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from IAD to SOU?
Typically you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change depending on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Southampton Airport (SOU)?
To touch down at Southampton Airport (SOU) on schedule, pick a flight that leaves Washington Dulles Intl. Airport (IAD) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Southampton Airport (SOU) last-minute?
Last-minute bookings from IAD to SOU are generally more expensive. To secure the lowest rates, start searching for flights well ahead of time. That said, if you can play around with your travel dates, it's possible to score a cheap fare right before your trip.
Is it cheaper to book an IAD to SOU flight and hotel package?
You'll generally save money by booking an IAD to SOU flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. After selecting your ideal flights and accommodations, you can add extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Southampton Airport (SOU)?
Generally, it's possible to reschedule or cancel your IAD to SOU flight. However, if it's been more than 24 hours since booking, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Southampton
Airlines serving
Aer Lingus, British Airways, Delta, KLM, Virgin Atlantic
Roundtrip price
$691
Distance
3640 mi

Book with confidence

Washington to Southampton Flights

The cheapest times to fly from Washington to Southampton

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Southampton are during the month of November. You can find some of the cheapest flights from Washington to Southampton with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Southampton

Sunday is one of the best days to book for cheap flights from Washington to Southampton: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Southampton

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Southampton in 2025. You can also book with separate airlines for your outbound and return journeys, from $470 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Southampton flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Southampton airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to Southampton Flights

Explore a world of travel with Expedia

*Available to One Key members.