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Find cheap flights from Southampton to Washington, D.C. from $950

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Southampton to Dulles Intl departing on 5/3. 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
0 bags
Sat 5/18
Sat 5/25

Search hundreds of travel sites at once for deals on flights to Washington, D.C.

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Southampton to Washington, D.C., 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 Southampton to Washington, D.C., as well as popular online travel agencies
In the last 7 days travelers have searched 44,553,814 times on KAYAK, and here is why:

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Cheap flight deals from Southampton to Dulles Intl (SOU-IAD)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Southampton to Dulles Intl 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 and deals for you by selecting your travel dates.
Choose your dates
7:40 pm - 4:00 pmSOU-IAD
25h 20m1 stop
5:50 pm - 7:10 pmIAD-SOU
20h 20m1 stop
$950Virgin Atlantic
Find Deal
Fri, May 3 - Tue, May 7
7:55 am - 3:35 pmSOU-IAD
12h 40m1 stop
1:24 pm - 7:25 amIAD-SOU
13h 01m2 stops
$967KLM
Find Deal
Fri, May 3 - Tue, May 7
7:40 pm - 11:59 pmSOU-IAD
33h 19m2 stops
5:20 pm - 7:25 amIAD-SOU
33h 05m2 stops
$971Delta
Find Deal
Fri, May 3 - Tue, May 7
7:40 pm - 7:25 pmSOU-IAD
28h 45m3 stops
8:45 pm - 9:10 amIAD-SOU
31h 25m3 stops
$1,032
Find Deal
Fri, May 3 - Tue, May 7
7:40 pm - 5:40 pmSOU-IAD
27h 00m3 stops
8:30 pm - 3:25 pmIAD-SOU
13h 55m2 stops
$1,270
Find Deal
Fri, May 3 - Tue, May 7
9:40 am - 3:40 pmSOU-IAD
11h 00m1 stop
5:55 pm - 1:25 pmIAD-SOU
14h 30m2 stops
$3,257British Airways
Find Deal
Fri, Jul 19 - Fri, Jul 19
9:40 am - 3:40 pmSOU-IAD
11h 00m1 stop
5:55 pm - 12:00 pmIAD-SOU
13h 05m2 stops
$3,303British Airways
Find Deal
Tue, Jun 25 - Tue, Jun 25
9:40 am - 3:40 pmSOU-IAD
11h 00m1 stop
8:40 pm - 7:30 pmIAD-SOU
17h 50m1 stop
$3,311British Airways
Find Deal
Tue, Jun 25 - Tue, Jun 25
9:40 am - 3:40 pmSOU-IAD
11h 00m1 stop
8:40 pm - 3:45 pmIAD-SOU
14h 05m1 stop
$3,336British Airways
Find Deal
Fri, Jul 19 - Fri, Jul 19

Flights from Southampton to Dulles Intl - Travel Insights & Trends

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Southampton to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Southampton to Washington, D.C. Dulles Intl Airport is September, where tickets cost $625 on average. On the other hand, the most expensive months are July and August, where the average cost of tickets is $798 and $776 respectively.

How far in advance should I book a flight from Southampton to Washington, D.C. Dulles Intl Airport?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Southampton to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Southampton to Washington, D.C. Dulles Intl Airport, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 86 days before departure.

Which airlines provide the cheapest flights from Southampton to Washington, D.C.?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The cheapest return flight ticket from Southampton to Washington, D.C. found by KAYAK users in the last 72 hours was for $950 on Virgin Atlantic, followed by KLM ($967). One-way flight deals have also been found from as low as $1,568 on British Airways and from $1,596 on Delta.

Good to know

Cheapest flight

$950
Flight from Southampton to Washington, D.C.

When to book flights from Southampton to Dulles Intl

Are your dates flexible? Find out the best times to travel from Southampton to Dulles Intl 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 Southampton to Washington, D.C. flights

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

    In the last 3 days, the lowest price for a flight from Southampton to Washington, D.C. Dulles Intl Airport was $1,568 for a one-way ticket and $950 for a round-trip.

  • Do I need a passport to fly between Southampton and Washington, D.C.?

    Yes, you’ll need a passport to travel to Washington, D.C. from Southampton.

  • Which aircraft models fly most regularly from Southampton to Washington, D.C.?

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

  • Which airline alliances offer flights from Southampton to Washington, D.C.?

    oneworld, and SkyTeam are the airline alliances operating flights between Southampton and Washington, D.C., with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Southampton to Washington, D.C.?

    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 Southampton to Washington, D.C..

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. from Southampton 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 Southampton to Washington, D.C.?

    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 Washington, D.C. with an airline and back to Southampton with another airline. Booking your flights between Southampton and IAD 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 Southampton to Washington, D.C.?

    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 Washington, D.C. from Southampton up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Book cheap flights from Southampton to Washington, D.C.

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Southampton to Washington, D.C. found on KAYAK in the last 72 hours.
9/26Thu
1 stopBritish Airways
14h 30mSOU-IAD
$1,568
9/26Thu
2 stopsBritish Airways
24h 40mSOU-IAD
$1,583
7/10Wed
1 stopDelta
12h 30mSOU-IAD
$1,596
7/8Mon
1 stopBritish Airways
11h 00mSOU-IAD
$1,622
7/7Sun
2 stopsBritish Airways
24h 45mSOU-IAD
$1,637
7/10Wed
2 stopsBritish Airways
16h 50mSOU-IAD
$1,642
7/11Thu
1 stopDelta
12h 05mSOU-IAD
$1,649
7/7Sun
1 stopBritish Airways
11h 00mSOU-IAD
$1,674
7/12Fri
2 stopsBritish Airways
29h 35mSOU-IAD
$1,689
7/12Fri
3 stopsBritish Airways
15h 10mSOU-IAD
$1,691

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Southampton - Washington, D.C. Flights

Departure:

Southampton (SOU)United Kingdom

Destination:

Washington, D.C. (IAD)United States

Return flight deals:

Washington, D.C. - Southampton

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