IAD - SOU

$340 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 7/27. 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
$775
Delta
Thu 3/19Tue 3/31
IAD - SOU • 1 stop
Cheapest one-way
$340
Multiple Airlines
Mon 7/27
IAD - SOU • 2 stops
Top airlines
Delta
Cheapest • from $775 (round-trip)
Aer Lingus
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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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 - Tue, Mar 31
Delta Logo
7:05 pm - 5:00 pm
IAD
-
SOU
17h 55m
1 stop
Delta Logo
5:20 pm - 3:35 pm
SOU
-
IAD
27h 15m
1 stop
$775Delta
Sun, Mar 15 - Tue, Mar 24
Delta Logo
7:05 pm - 5:05 pm
IAD
-
SOU
18h 00m
1 stop
Delta Logo
5:35 pm - 5:05 pm
SOU
-
IAD
27h 30m
1 stop
$776Delta
Mon, Mar 23 - Tue, Mar 31
Delta Logo
1:19 pm - 8:20 am
IAD
-
SOU
15h 01m
2 stops
Delta Logo
5:20 pm - 3:35 pm
SOU
-
IAD
27h 15m
1 stop
$780Delta
Wed, Mar 18 - Tue, Mar 24
Delta Logo
7:18 am - 8:20 am
IAD
-
SOU
21h 02m
2 stops
Delta Logo
5:35 pm - 5:05 pm
SOU
-
IAD
27h 30m
1 stop
$781Delta
Sun, Mar 15 - Mon, Mar 23
Delta Logo
7:05 pm - 5:05 pm
IAD
-
SOU
18h 00m
1 stop
Delta Logo
5:40 pm - 7:19 pm
SOU
-
IAD
29h 39m
2 stops
$786Delta
Thu, Mar 19 - Wed, Apr 1
Delta Logo
7:05 pm - 5:00 pm
IAD
-
SOU
17h 55m
1 stop
Delta Logo
9:05 am - 3:35 pm
SOU
-
IAD
11h 30m
1 stop
$791Delta
Fri, Mar 20 - Tue, Mar 31
Delta Logo
7:05 pm - 8:50 am
IAD
-
SOU
9h 45m
1 stop
Delta Logo
5:20 pm - 3:35 pm
SOU
-
IAD
27h 15m
1 stop
$894Delta
Fri, Mar 20 - Mon, Mar 30
Delta Logo
7:05 pm - 8:50 am
IAD
-
SOU
9h 45m
1 stop
Delta Logo
5:20 pm - 3:35 pm
SOU
-
IAD
27h 15m
1 stop
$895Delta
Fri, Mar 20 - Wed, Apr 1
Delta Logo
7:05 pm - 8:50 am
IAD
-
SOU
9h 45m
1 stop
Delta Logo
9:05 am - 3:35 pm
SOU
-
IAD
11h 30m
1 stop
$910Delta
Thu, May 21 - Thu, May 28
Delta Logo
5:40 pm - 8:35 am
IAD
-
SOU
9h 55m
1 stop
Delta Logo
9:05 am - 3:35 pm
SOU
-
IAD
11h 30m
1 stop
$951Delta
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 Delta ($775) and Aer Lingus ($999).

Find deals

Good to know

Cheapest flight$340
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 $340 for a one-way ticket and $775 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 1447 reviews
7.1Comfort
8.0Crew
6.6Food
7.4Boarding
6.9Entertainment
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.

Our first flight from Venice to Dublin was delayed due to very bad weather and when we did arrive we were ushered out of the secure area to collect our luggage then told we could not Demeter as the US Customs team closed at 4pm. Thus we were stuck in Dublin for one night with hundreds of passengers scrambling for information and little help from the local staff. Many passengers were left without accommodation and told to find something on their own. We were also told we would get contacted with rebooking details and did not, requiring us to make those arrangements ourselves, in some cases at a very high out of pocket cost. Many passengers swore they would never fly on Aer Lingus again.

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)