IAD - SOU

$494 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 9/26. 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

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

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

Wed, Oct 1 - Sun, Oct 5
KLM Logo
5:25 pm - 5:00 pmIAD-SOU
18h 35m1 stop
KLM Logo
6:25 pm - 3:35 pmSOU-IAD
26h 10m1 stop
$795KLM
Find Deal
Sun, Sep 28 - Tue, Oct 14
Delta Logo
5:25 pm - 8:45 amIAD-SOU
10h 20m1 stop
Delta Logo
9:20 am - 3:35 pmSOU-IAD
11h 15m1 stop
$812Delta
Find Deal
Wed, Oct 1 - Sun, Oct 5
Delta Logo
10:07 am - 8:45 amIAD-SOU
17h 38m2 stops
Delta Logo
6:25 pm - 3:35 pmSOU-IAD
26h 10m1 stop
$814Delta
Find Deal
Sun, Sep 28 - Mon, Oct 13
Delta Logo
5:00 pm - 8:45 amIAD-SOU
34h 45m2 stops
Delta Logo
5:35 pm - 3:35 pmSOU-IAD
27h 00m1 stop
$816Delta
Find Deal
Wed, Oct 1 - Sun, Oct 5
Delta Logo
12:08 pm - 8:45 amIAD-SOU
15h 37m2 stops
Delta Logo
6:25 pm - 4:29 pmSOU-IAD
27h 04m2 stops
$819Delta
Find Deal
Fri, Mar 6 - Sat, Mar 21
KLM Logo
6:05 pm - 5:00 pmIAD-SOU
17h 55m1 stop
KLM Logo
5:30 pm - 5:05 pmSOU-IAD
27h 35m1 stop
$820KLM
Find Deal
Sat, Nov 8 - Sat, Nov 15
Aer Lingus Logo
5:05 pm - 8:45 amIAD-SOU
10h 40m1 stop
Aer Lingus Logo
9:30 am - 7:30 pmSOU-IAD
15h 00m1 stop
$977Aer Lingus
Find Deal
Fri, Mar 6 - Sat, Mar 21
Aer Lingus Logo
5:05 pm - 8:45 amIAD-SOU
10h 40m1 stop
Aer Lingus Logo
9:30 am - 4:35 pmSOU-IAD
35h 05m2 stops
$1,050Aer Lingus
Find Deal
Sat, Nov 8 - Sat, Nov 15
British Airways Logo
5:05 pm - 8:45 amIAD-SOU
10h 40m1 stop
British Airways Logo
3:45 pm - 7:55 pmSOU-IAD
33h 10m2 stops
$1,409British Airways
Find Deal
Sat, Nov 8 - Sat, Nov 15
British Airways Logo
9:00 pm - 3:35 pmIAD-SOU
13h 35m1 stop
British Airways Logo
8:55 am - 3:35 pmSOU-IAD
35h 40m2 stops
$1,410British Airways
Find Deal

Everything you should know

Top airlines
KLM
Cheapest • from $795 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$795
KLM
Wed 10/1Sun 10/5
IAD - SOU • 1 stop
Cheapest one-way
$494
KLM
Fri 9/26
IAD - SOU • 1 stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Southampton!
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 ($795) and Delta ($812).

Good to know

Cheapest flight$494
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 $494 for a one-way ticket and $795 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, and oneworld are the airline alliances operating flights between Washington Dulles Airport and Southampton, with SkyTeam being the most commonly used for this route.

  • 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 $1,119 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 $812 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 7957 reviews
7.9Comfort
7.9Entertainment
7.3Food
8.2Boarding
8.5Crew
Airline reviews

The staff and the boarding procedure were all amazing . The one flight was not equipped with WIFI which now adays seems odd. All in all the experience was good

8.0 ExcellentAnonymous, Sep 2025GFK - MSP
Read more Delta reviews

The staff and the boarding procedure were all amazing . The one flight was not equipped with WIFI which now adays seems odd. All in all the experience was good

Passengers need to check in big baggage instead of bringing on the plane. That cause inconvenience for everyone. Otherwise flight was good.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Better food than other airlines and the flight staff was very attentive and nice.

My flights with Aer Lingus were very good and I will definitely fly with them. Again in future trips to Ireland and Scotland.

Too hot. Asked for an extra glass of water and was ignored. Asked to sit in empty seats that were open because it was so hot and crowded and was denied and the seats were empty the entire flight

Terrible leg room - I’m 5’3” and my knees were touching the seat in front of me. When the person sitting in front of me leaned back, there was about 15 inches of space between my head and the TV screen which made it awkward to view movies. Last year they had decent food, but this year the only tasty item on the trip was dessert.

The flight was delayed leaving Philadelphia due to “catering” and consequently arrived in Dublin some 75 minutes later than scheduled. Consequently this caused me to miss my connecting flight to Glasgow and I had to spend the night in Dublin.

The flight from Cincinnati to Philadelphia was satisfactory and uneventful.

Horrible. I had to wait in Dublin for 4 hours for the next connecting flight which took my to London and than i had to wait 3 hours for the flight to Dusseldorf

It was truly a horrible flight. We were delayed almost 2 hours. The seats were so tiny, my legs were hurting the entire flight. When i finally made it to Ireland i missed my connecting flight because we left Newark late. I will most likely never fly Aer Lingus again

Terrible. The test of an airline is how they deal with problems. There is very little to differentiate between airlines. Aer Lingus failed absolutely. They lost one of my bags even though we had more than a 2 hour connection in Dublin. Trying to get it back has been awful. In checking on line I can see that the bag is in Edinburgh and it was supposed to be delivered today. It wasn't. The number we have in the UK doesn't answer. I had to pay for an international call to speak to somebody. All the woman at the call centre could say was be patient wait. I can tell you when it will be delivered nor can I tell you who the courier is.

Not JetBlue's fault but Aer Lingus never explained how to transfer to JetBlue.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.