IAD - SOU

$396 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 5/7. 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
$747
Virgin Atlantic
Mon 2/16Wed 2/25
IAD - SOU • 1 stop
Cheapest one-way
$396
Delta
Thu 5/7
IAD - SOU • 1 stop
Top airlines
Virgin Atlantic
Cheapest • from $747 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
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Airline reviews
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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

Mon, Feb 16 - Wed, Feb 25
Virgin Atlantic Logo
6:05 pm - 5:05 pm
IAD
-
SOU
18h 00m1 stop
Virgin Atlantic Logo
8:50 am - 4:05 pm
SOU
-
IAD
12h 15m1 stop
$747Virgin Atlantic
Mon, Feb 16 - Wed, Feb 25
KLM Logo
12:35 pm - 8:50 am
IAD
-
SOU
15h 15m2 stops
KLM Logo
8:50 am - 4:05 pm
SOU
-
IAD
12h 15m1 stop
$752KLM
Mon, Feb 16 - Wed, Feb 25
KLM Logo
12:24 pm - 8:50 am
IAD
-
SOU
15h 26m2 stops
KLM Logo
8:50 am - 11:09 pm
SOU
-
IAD
19h 19m2 stops
$762KLM
Sat, Jan 17 - Sat, Jan 24
Delta Logo
6:05 pm - 5:15 pm
IAD
-
SOU
18h 10m1 stop
Delta Logo
9:25 am - 4:05 pm
SOU
-
IAD
11h 40m1 stop
$773Delta
Sat, Jan 17 - Sat, Jan 24
Delta Logo
7:00 am - 8:50 am
IAD
-
SOU
44h 50m2 stops
Delta Logo
9:25 am - 4:05 pm
SOU
-
IAD
11h 40m1 stop
$778Delta
Sat, Jan 17 - Sat, Jan 24
Delta Logo
7:49 pm - 8:50 am
IAD
-
SOU
32h 01m2 stops
Delta Logo
9:25 am - 7:09 pm
SOU
-
IAD
38h 44m2 stops
$780Delta
Thu, May 7 - Thu, May 14
Delta Logo
5:40 pm - 8:35 am
IAD
-
SOU
9h 55m1 stop
Delta Logo
9:05 am - 3:35 pm
SOU
-
IAD
11h 30m1 stop
$787Delta
Thu, Feb 19 - Thu, Feb 26
Delta Logo
12:38 pm - 8:25 am
IAD
-
SOU
14h 47m2 stops
Delta Logo
8:50 am - 7:09 pm
SOU
-
IAD
15h 19m2 stops
$788Delta
Thu, Apr 9 - Sun, Apr 12
Delta Logo
12:14 pm - 8:35 am
IAD
-
SOU
15h 21m2 stops
Delta Logo
5:20 pm - 3:35 pm
SOU
-
IAD
27h 15m1 stop
$792Delta
Thu, May 7 - Mon, May 18
Delta Logo
5:40 pm - 8:35 am
IAD
-
SOU
9h 55m1 stop
Delta Logo
5:20 pm - 7:16 pm
SOU
-
IAD
30h 56m2 stops
$797Delta
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 Virgin Atlantic ($747) and KLM ($752).

Which airlines fly non-stop between Washington, D.C. Dulles Intl Airport and Southampton?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Washington, D.C. Dulles Intl Airport to Southampton.

There are 2 airlines that fly nonstop from Washington, D.C. Dulles Intl Airport to Southampton. They are Aer Lingus and Delta. The cheapest airline for this route is Aer Lingus, with the best round-trip deal found costing $677. On average, the best prices for this route can be found at Aer Lingus.

Good to know

Cheapest flight$396
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 $396 for a one-way ticket and $747 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.

  • Which airline alliances offer flights from Washington Dulles Airport to Southampton?

    SkyTeam is the only airline alliance operating flights between Washington Dulles Airport and Southampton.

  • Which is the best airline for flights from Washington, D.C. to Southampton, Delta or Aer Lingus?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Southampton are Delta and Aer Lingus. With an average price for the route of $1,172 and an overall rating of 7.9, Delta is the most popular choice. Aer Lingus is also a great choice for the route, with an average price of $900 and an overall rating of 7.2.

  • 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 airlines 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.
7.9
DeltaOverall score based on 8018 reviews
7.8Entertainment
8.1Boarding
8.5Crew
7.2Food
7.9Comfort
Airline reviews

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

6.0 GoodJason, Jan 2026
BOS - SFO
Read more Delta reviews

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Late delayed flight delays boarding and delays leaving and delays on arrival too. Cramped plane no room no food.

DTW line is too long. The flights from DTW to BWI are always delayed for unknown reasons.

Delta canceled our flight and we had to scramble to find another airline to get home. Phoenix is not a delta hub so they didn’t have another plane. It would have been a red eye though Salt Lake City. Getting in at 5am. No bueno.

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

This flight was a first class choice and left much to be desired. Seat backs on seats were falling apart and torn. Seats actually didn't come to a "full & upright position". Pull out table was sprung. Not any significant leg room. All in all we were on an obviously older plane and felt overcharged for what we received as first class.

A 12 hour flight during the day with one real meal service - are you kidding? Also the breakfast was one of the worst and not what was listed

Flight was delayed several times. At one point, they "pulled back" 15 minutes from the delayed boarding and sent a text saying we would board sooner than previously advised. The flight then was delayed again. And when we boarded, there was an unspecified technical issue which had us waiting in the plane for about an hour.

Delta is a good airline. I've never had an issue with Delta. I'll continue to fly with them until they show me that I shouldn't.

The only thing nice I can say is the flight crew was really nice and apologetic about the situation. They shared as much information as they had and advised us on what we could do about missing connecting flights. The boarding process was so slow. The gate agent was working by herself and should have had someone working with her. It took almost an hour to board because she was trying to board a full flight of people and provide customer service to everyone who was flying standby and/or had questions. It was really chaotic. This didn't help the fact that we were delayed and folks were missing connections the longer it took.

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.

NOTE. Aer Lingus does not accept American Express. I was denied boarding because I could not pay the fee for my oversized bag. I did not have another credit or debit card. Moreover, at CDG, I needed to check my bag at one location, go to another location to check my oversized bag and a THIRD location to pay for my oversized bag. Hence, once I was denied boarding, my bags were already en route to the plane. To retrieve them I needed to go to a FOURTH location in another part of the terminal. Last, Aer Lingus will not reimburse me for any portion of my ticket. I lost $1000 bc Aer Lingus doesn’t accept American Express at the CDG counter even though I paid for my ticket through the Kayak link with Amex. Kayak should remedy this situation if they want to continue to partner with Aer Lingus.

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.

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.

I liked the front row seats. A lot of leg room. The check-in window needs to be longer

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

Information on your arrival and departure airports