IAD - SOU

$571 Find Cheap Flights from Washington Dulles Airport to Southampton

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Southampton departing on 6/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Southampton

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Southampton, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Southampton, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$790
KLM
Thu 3/19Sun 4/12
IAD - SOU • 1 stop
Cheapest one-way
$571
KLM
Thu 6/11
IAD - SOU • 1 stop
Top airlines
KLM
Cheapest • from $790 (round-trip)
Aer Lingus
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Dulles Intl and Southampton. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Dublin (DUB)
Cheapest • Avg $991 (round-trip)
Amsterdam (AMS)
Shortest trip • 10h 11m (one-way)
Insights
Insights
Insights
Insights
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Southampton!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Dulles Intl to Southampton (IAD-SOU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Southampton that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Dulles Intl to Southampton

Thu, Mar 19 - Sun, Apr 12
KLM Logo
7:05 pm - 5:00 pm
IAD
-
SOU
17h 55m
1 stop
KLM Logo
5:20 pm - 3:35 pm
SOU
-
IAD
27h 15m
1 stop
$790KLM
Fri, Apr 3 - Fri, Apr 10
KLM Logo
5:40 pm - 8:45 am
IAD
-
SOU
10h 05m
1 stop
KLM Logo
5:20 pm - 3:35 pm
SOU
-
IAD
27h 15m
1 stop
$791KLM
Fri, Apr 3 - Thu, Apr 9
Delta Logo
7:00 am - 8:45 am
IAD
-
SOU
20h 45m
2 stops
Delta Logo
9:05 am - 3:35 pm
SOU
-
IAD
11h 30m
1 stop
$796Delta
Fri, Apr 3 - Fri, Apr 10
Virgin Atlantic Logo
5:40 pm - 8:45 am
IAD
-
SOU
10h 05m
1 stop
Virgin Atlantic Logo
9:05 am - 11:41 pm
SOU
-
IAD
19h 36m
2 stops
$856Virgin Atlantic
Mon, Apr 6 - Mon, Apr 13
Virgin Atlantic Logo
6:10 pm - 8:35 am
IAD
-
SOU
9h 25m
1 stop
Virgin Atlantic Logo
9:05 am - 11:03 pm
SOU
-
IAD
18h 58m
2 stops
$864Virgin Atlantic
Tue, Mar 10 - Thu, Mar 19
Aer Lingus Logo
10:00 pm - 3:35 pm
IAD
-
SOU
13h 35m
1 stop
Aer Lingus Logo
9:30 am - 8:30 pm
SOU
-
IAD
15h 00m
1 stop
$876Aer Lingus
Thu, Mar 19 - Sun, Apr 12
KLM Logo
12:14 pm - 8:20 am
IAD
-
SOU
16h 06m
2 stops
KLM Logo
5:20 pm - 3:35 pm
SOU
-
IAD
27h 15m
1 stop
$909KLM
Mon, Mar 9 - Mon, Mar 23
Aer Lingus Logo
10:00 pm - 11:55 am
IAD
-
SOU
9h 55m
1 stop
Aer Lingus Logo
9:30 am - 8:30 pm
SOU
-
IAD
15h 00m
1 stop
$918Aer Lingus
Sat, Mar 7 - Fri, Mar 20
Aer Lingus Logo
5:05 pm - 8:45 am
IAD
-
SOU
10h 40m
1 stop
Aer Lingus Logo
9:30 am - 8:30 pm
SOU
-
IAD
15h 00m
1 stop
$935Aer Lingus
Sat, Mar 7 - Fri, Mar 20
Aer Lingus Logo
9:00 pm - 8:45 am
IAD
-
SOU
30h 45m
1 stop
Aer Lingus Logo
9:30 am - 8:30 pm
SOU
-
IAD
15h 00m
1 stop
$942Aer Lingus
Booking Insights

KAYAK's insights & trends for Dulles Intl to Southampton flights

Get data-powered insights and trends into flights from Dulles Intl to Southampton to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Washington Dulles Airport to Southampton?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Washington Dulles Airport to Southampton were found on KLM ($790) and Delta ($796).

Find deals

Good to know

Cheapest flight$571
Flight from Washington Dulles Airport to Southampton

When to book flights from Dulles Intl to Southampton

Are your dates flexible? Find out the best times to travel from Dulles Intl to Southampton based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington Dulles Airport to Southampton flights

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to Southampton?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Southampton was $571 for a one-way ticket and $790 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Southampton?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Washington Dulles Airport and on arrival in Southampton.

  • Which airports will I be using when flying from Washington Dulles Airport to Southampton?

    When flying out of Washington Dulles Airport you will be using Washington, D.C. Dulles Intl. You will be landing at Southampton, also known as Southampton Eastleigh.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Southampton?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Southampton?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to Southampton.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to Southampton?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Southampton from Washington Dulles Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington Dulles Airport to Southampton?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Southampton with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and SOU can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Southampton?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Southampton from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Dulles Intl to Southampton

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Southampton. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Dulles Intl to Southampton? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
Aer LingusOverall score based on 1460 reviews
7.0Entertainment
7.1Comfort
8.1Crew
6.6Food
7.4Boarding
Airline reviews

Great. Has a problem with DOB. Fixed 4 us. Led to a 5 hour earlier flight to London!

10.0 ExcellentAnonymous, Feb 2026
DUB - LHR
Read more Aer Lingus reviews

Great. Has a problem with DOB. Fixed 4 us. Led to a 5 hour earlier flight to London!

Punctual, smooth flight. Crew excellent and cabin very clean. Paid for WiFi but once you close out you cannot get back in even if you paid for entire flight.

Flight crew was superb. Meal was one of the meals at altitude I’ve had

Canceled my flight couple hours before takeoff. They could not find a decent re-routing and refused to pay for when i subjected alternative with Lufthansa.

Seats a little to soft on the SFO DUB flight

Well, I think we left close to on time. Crew was “eh”.

Flight takeoff was delayed an hour, but arrival time was not updated at the same time as departure time, so those picking me up at the other end were not alerted to the change in my arrival.

Seats are terribly cramped. I’m only 5’2” and my knees were practically in my face. No room to put a normal size bag under the seat and when the person in front of you reclined their seat your tray table was in your lap. This is the airline’s way of cramming more seats into the plane to make more money. I’ll think twice about taking Aer Lingus again since there are a few other options from Boston to the Emerald Isle.

Couldn’t check In online, message was couldn’t check in until Sunday morning though plane left Saturday night. Checked in okay at airport but caused slot if stress.

Fast and sensible boarding was absolutely amazing. But extortionate wifi and seats that barely moved, making me unable to sleep, didn't do a lot of favors.

Everything you need to know for your flight from Dulles Intl to Southampton

Information on your arrival and departure airports

Washington Dulles Airport (IAD)
Southampton (SOU)