IAD - SOU

$493 Find Cheap Flights from Washington Dulles Airport to Southampton - Compare and Save

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 8/23. 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

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Everything you should know

Cheapest round-trip
$868
Multiple Airlines
Fri 8/7Thu 8/13
IAD - SOU • 2 stops
Cheapest one-way
$493
Aer Lingus
Sun 8/23
IAD - SOU • 1 stop
Top airlines
Aer Lingus
Cheapest • from $973 (round-trip)
Aer Lingus
Best reviews • 7.3 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
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Insights
Top layover airports
Dublin (DUB)
Cheapest • Avg $1,021 (round-trip)
Amsterdam (AMS)
Shortest trip • 10h 00m (one-way)
Insights
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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

Fri, Aug 7 - Thu, Aug 13
Multiple Airlines Logo
4:20 pm - 7:30 pm
IAD
-
SOU
22h 10m
2 stops
Multiple Airlines Logo
8:00 pm - 8:24 pm
SOU
-
IAD
29h 24m
2 stops
$868Multiple Airlines
Fri, Aug 7 - Thu, Aug 13
Multiple Airlines Logo
4:20 pm - 7:30 pm
IAD
-
SOU
22h 10m
2 stops
Multiple Airlines Logo
8:00 pm - 7:01 pm
SOU
-
IAD
28h 01m
3 stops
$872Multiple Airlines
Tue, Sep 29 - Thu, Oct 15
Multiple Airlines Logo
8:25 pm - 8:45 am
IAD
-
SOU
31h 20m
2 stops
Multiple Airlines Logo
9:20 am - 3:45 pm
SOU
-
IAD
11h 25m
1 stop
$901Multiple Airlines
Tue, Sep 29 - Thu, Oct 15
Multiple Airlines Logo
8:30 pm - 7:30 pm
IAD
-
SOU
18h 00m
2 stops
Multiple Airlines Logo
9:25 am - 8:25 pm
SOU
-
IAD
40h 00m
3 stops
$912Multiple Airlines
Tue, Sep 29 - Thu, Oct 15
Multiple Airlines Logo
8:30 pm - 7:30 pm
IAD
-
SOU
18h 00m
2 stops
Multiple Airlines Logo
9:25 am - 3:45 pm
SOU
-
IAD
35h 20m
2 stops
$941Multiple Airlines
Sat, Aug 15 - Sun, Aug 23
Aer Lingus Logo
8:40 pm - 7:30 pm
IAD
-
SOU
17h 50m
1 stop
Aer Lingus Logo
9:20 am - 3:45 pm
SOU
-
IAD
11h 25m
1 stop
$973Aer Lingus
Tue, Sep 29 - Thu, Oct 15
Multiple Airlines Logo
9:45 am - 10:15 am
IAD
-
SOU
19h 30m
3 stops
Multiple Airlines Logo
9:25 am - 8:25 pm
SOU
-
IAD
40h 00m
3 stops
$984Multiple Airlines
Fri, Aug 7 - Thu, Aug 13
Multiple Airlines Logo
9:45 am - 7:30 pm
IAD
-
SOU
28h 45m
2 stops
Multiple Airlines Logo
8:00 pm - 3:24 pm
SOU
-
IAD
24h 24m
2 stops
$1,004Multiple Airlines
Sat, Aug 15 - Sun, Aug 23
Aer Lingus Logo
5:15 pm - 8:35 am
IAD
-
SOU
10h 20m
1 stop
Aer Lingus Logo
8:00 pm - 3:30 pm
SOU
-
IAD
24h 30m
2 stops
$1,044Aer Lingus
Mon, Aug 24 - Thu, Sep 3
Delta Logo
6:10 pm - 8:45 am
IAD
-
SOU
9h 35m
1 stop
Delta Logo
5:20 pm - 3:35 pm
SOU
-
IAD
27h 15m
1 stop
$1,114Delta
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 5 days.

In the past 5 days, the cheapest round-trip tickets from Washington Dulles Airport to Southampton were found on Aer Lingus ($973) and Delta ($1,114).

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Good to know

Cheapest flight$493
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 5 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Southampton was $493 for a one-way ticket and $868 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.
7.3
Aer LingusOverall score based on 1666 reviews
7.2Comfort
8.1Crew
7.0Entertainment
6.6Food
7.4Boarding
Airline reviews

Air Lingus was in no hurry to get us on the plane as sat at the gate a long time before they boarded us. Then they leave us on the tarmac for an hour. They were no help to let me know what I needed to do to get home. I had to navigate London Heathrow with 0 help from them.

2.0 MediocreGeorge Craig, Jul 2026
DUB - LHR
Read more Aer Lingus reviews

Air Lingus was in no hurry to get us on the plane as sat at the gate a long time before they boarded us. Then they leave us on the tarmac for an hour. They were no help to let me know what I needed to do to get home. I had to navigate London Heathrow with 0 help from them.

There was a 6h delay with limited updates . When we got to Manchester the bus took ages to get to arrivals and we missed our train, dinner reservation. Basically lost a whole day due to arrivals Lingus!!

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

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

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.

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

Amenity kits were never handed out. There was zero friendliness and assistance by crew. Food was uneatable. One drink was offered and no wine, with dinner or before or after. Cocktails and beverages were not encouraged and when I asked for water, none was given. Poorest, most cramped business class flight I’ve ever been on.

I fly to the USA every 6wks on Ave and 99% of the time I fly Aer Lingus. If I fly BA I’m always disappointed. My only criticism is the food. I’m vegan and over the last year it’s got slightly better these last couple of flights but on the whole it’s not good! Salad and fruit salad for breakfast and that’s also the starter and desert for the lunch/dinner and the main is usually rice with fried veg 😳the pasta is pretty good though. That’s been the last 2 meals…. Everything else is fantastic.

The flight was half full and I presume that the next few days are even less busy not sure why they are still charging a premium to change a flight.

The only problem was there are games on the entertaiment system. The guy behind me played poker the entire time and poking the back of my seat. I hope they remove these.

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)