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Cheap flights from Washington, D.C. to London from £364

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to London departing on 26/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. to London

Cheap return flights

KLM Logo
17:25 - 08:45IAD-SOU
10h 20m1 stop
KLM Logo
09:20 - 15:35SOU-IAD
11h 15m1 stop
£599KLM
Find Deal
Thu, 9 Oct - Fri, 24 Oct
Delta Logo
07:05 - 08:20IAD-SOU
21h 15m2 stops
Delta Logo
08:40 - 16:05SOU-IAD
12h 25m1 stop
£602Delta
Find Deal
Wed, 29 Oct - Wed, 5 Nov
Delta Logo
18:05 - 08:50IAD-SOU
9h 45m1 stop
Delta Logo
09:25 - 17:05SOU-IAD
11h 40m1 stop
£605Delta
Find Deal
Fri, 6 Mar - Sat, 21 Mar
Delta Logo
13:15 - 08:45DCA-SOU
14h 30m2 stops
Delta Logo
09:20 - 23:04SOU-DCA
18h 44m2 stops
£609Delta
Find Deal
Thu, 9 Oct - Fri, 24 Oct
Delta Logo
12:27 - 08:20IAD-SOU
15h 53m2 stops
Delta Logo
08:40 - 23:00SOU-IAD
19h 20m2 stops
£609Delta
Find Deal
Wed, 29 Oct - Wed, 5 Nov
Logo
17:20 - 08:40IAD-SOU
10h 20m1 stop
Logo
09:10 - 15:50SOU-IAD
11h 40m1 stop
£678
Find Deal
Wed, 1 Oct - Sun, 5 Oct
Logo
09:45 - 14:10IAD-SOU
24h 25m3 stops
Logo
14:25 - 16:40SOU-IAD
31h 15m2 stops
£694
Find Deal
Wed, 29 Oct - Wed, 5 Nov
Aer Lingus Logo
17:05 - 15:35IAD-SOU
17h 30m1 stop
Aer Lingus Logo
09:30 - 19:30SOU-IAD
15h 00m1 stop
£720Aer Lingus
Find Deal
Sat, 8 Nov - Sat, 15 Nov
British Airways Logo
21:00 - 19:40IAD-SOU
17h 40m1 stop
British Airways Logo
08:55 - 15:35SOU-IAD
35h 40m2 stops
£1,039British Airways
Find Deal
Sat, 8 Nov - Sat, 15 Nov
British Airways Logo
17:20 - 08:40IAD-SOU
10h 20m1 stop
British Airways Logo
08:55 - 17:30SOU-IAD
13h 35m2 stops
£1,070British Airways
Find Deal
Wed, 1 Oct - Sun, 5 Oct

KLM flights from Washington, D.C. to Southampton

Our best KLM deals on Washington, D.C. to Southampton flight tickets
KLM
9 Oct
IAD17:25Washington, D.C. Dulles Intl
10h 20m
1 stop
SOU08:45Southampton Eastleigh
24 Oct
SOU09:20Southampton Eastleigh
11h 15m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£599
Find similar
KLM
9 Oct
IAD17:25Washington, D.C. Dulles Intl
10h 20m
1 stop
SOU08:45Southampton Eastleigh
24 Oct
SOU09:20Southampton Eastleigh
14h 58m
2 stops
IAD19:18Washington, D.C. Dulles Intl
£698
Find similar
KLM
9 Oct
IAD21:20Washington, D.C. Dulles Intl
14h 40m
2 stops
SOU17:00Southampton Eastleigh
24 Oct
SOU09:20Southampton Eastleigh
14h 55m
2 stops
IAD19:15Washington, D.C. Dulles Intl
£779
Find similar

Delta flights from Washington, D.C. to Southampton

Our best Delta deals on Washington, D.C. to Southampton flight tickets
Delta
29 Oct
IAD07:05Washington, D.C. Dulles Intl
21h 15m
2 stops
SOU08:20Southampton Eastleigh
5 Nov
SOU08:40Southampton Eastleigh
12h 25m
1 stop
IAD16:05Washington, D.C. Dulles Intl
£602
Find similar
Delta
6 Mar
IAD18:05Washington, D.C. Dulles Intl
9h 45m
1 stop
SOU08:50Southampton Eastleigh
21 Mar
SOU09:25Southampton Eastleigh
11h 40m
1 stop
IAD17:05Washington, D.C. Dulles Intl
£605
Find similar
Delta
9 Oct
DCA13:15Washington, D.C. Reagan-National
14h 30m
2 stops
SOU08:45Southampton Eastleigh
24 Oct
SOU09:20Southampton Eastleigh
18h 44m
2 stops
DCA23:04Washington, D.C. Reagan-National
£609
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Washington, D.C. to Southampton that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 15 September 2025.
Use the filters below to find and compare flights from Washington, D.C. to Southampton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Thu 9/10

17:25-08:45

1 stop10h 20m

Southampton Eastleigh

Fri 24/10

09:20-15:35

1 stop11h 15m

£599

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 29/10

07:05-08:20

2 stops21h 15m

Southampton Eastleigh

Wed 5/11

08:40-16:05

1 stop12h 25m

£602

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Fri 6/3

18:05-08:50

1 stop9h 45m

Southampton Eastleigh

Sat 21/3

09:25-17:05

1 stop11h 40m

£605

Washington, D.C.Southampton

DCA - SOU

DCASOU

Washington, D.C. Reagan-National

Thu 9/10

13:15-08:45

2 stops14h 30m

Southampton Eastleigh

Fri 24/10

09:20-23:04

2 stops18h 44m

£609

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 29/10

12:27-08:20

2 stops15h 53m

Southampton Eastleigh

Wed 5/11

08:40-23:00

2 stops19h 20m

£609

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 1/10

17:20-08:40

1 stop10h 20m

Southampton Eastleigh

Sun 5/10

09:10-15:50

1 stop11h 40m

£678

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 29/10

09:45-14:10

3 stops24h 25m

Southampton Eastleigh

Wed 5/11

14:25-16:40

2 stops31h 15m

£694

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 8/11

17:05-15:35

1 stop17h 30m

Southampton Eastleigh

Sat 15/11

09:30-19:30

1 stop15h 00m

£720

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 8/11

21:00-19:40

1 stop17h 40m

Southampton Eastleigh

Sat 15/11

08:55-15:35

2 stops35h 40m

£1,039

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 1/10

17:20-08:40

1 stop10h 20m

Southampton Eastleigh

Sun 5/10

08:55-17:30

2 stops13h 35m

£1,070

Flights are sorted by cheapest return flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Washington, D.C. to Southampton

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Washington, D.C. to Southampton Eastleigh?

KLM, Delta, and Aer Lingus are the most popular carriers operating from Washington, D.C. to Southampton Eastleigh

Which airlines fly to Southampton?

British Airways, Virgin Atlantic and Icelandair are the top three most popular airlines that fly to Southampton from Washington, D.C. according to our data. British Airways is the first choice among our users, with 44% of people opting to fly with this airline when travelling to Southampton. Keep in mind that there are 9 different airlines that fly to Southampton on a routine basis, so you have a few additional options to choose from.

When to book flights from Washington, D.C. to Southampton

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to Southampton according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Washington, D.C. to Southampton (WAS to SOU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Southampton

Direct flights

None
There are no direct flights from Washington, D.C. to Southampton. There are no popular flight routes from Washington, D.C. to Southampton.
Search flight deals

  • How far is Washington, D.C. to Southampton Eastleigh by plane?

    Washington, D.C. and Southampton Eastleigh are 3622.6 mi apart from one another. 9h 45m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Washington, D.C. to Southampton Eastleigh Airport?

    Prices for flights from Washington, D.C. to Southampton Eastleigh Airport are updated daily.

  • How old do you have to be to fly from Washington, D.C. to Southampton Eastleigh Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to Southampton Eastleigh Airport.

  • What documentation or ID do you need to fly to Southampton Eastleigh Airport?

    The travel and health documents you'll need for your trip to Southampton Eastleigh Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Southampton Eastleigh Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Portsmouth

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Southampton?

It is quick and easy to find Washington, D.C. to Southampton flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Southampton that suits you.

Can I find flights from Washington, D.C. to Southampton with flexible booking policies on momondo?

Yes. All flights to Southampton from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington, D.C. to Southampton?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to Southampton.

I’m not ready to book a flight from Washington, D.C. to Southampton right now. Can momondo alert me if prices change?

Price alerts on flights to Southampton from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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