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Cheap flights from Washington, D.C. to London from £501

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 11/6. 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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0 bags
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Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
20:45 - 16:50
IAD
-
SOU
15h 05m
1 stop
Multiple Airlines Logo
18:10 - 19:15
SOU
-
IAD
30h 05m
2 stops
£780Multiple Airlines
Thu, 17 Sep - Tue, 6 Oct
Multiple Airlines Logo
17:15 - 08:40
IAD
-
SOU
10h 25m
1 stop
Multiple Airlines Logo
19:20 - 15:10
SOU
-
IAD
24h 50m
2 stops
£800Multiple Airlines
Mon, 11 May - Mon, 18 May
KLM Logo
18:10 - 17:35
IAD
-
SOU
18h 25m
1 stop
KLM Logo
17:20 - 15:35
SOU
-
IAD
27h 15m
1 stop
£837KLM
Mon, 24 Aug - Mon, 7 Sep
KLM Logo
18:10 - 08:45
IAD
-
SOU
9h 35m
1 stop
KLM Logo
17:20 - 15:35
SOU
-
IAD
27h 15m
1 stop
£838KLM
Mon, 24 Aug - Mon, 7 Sep
KLM Logo
12:00 - 08:45
IAD
-
SOU
15h 45m
2 stops
KLM Logo
17:20 - 15:35
SOU
-
IAD
27h 15m
1 stop
£840KLM
Mon, 24 Aug - Mon, 7 Sep
KLM Logo
12:30 - 08:45
IAD
-
SOU
15h 15m
2 stops
KLM Logo
17:20 - 15:35
SOU
-
IAD
27h 15m
1 stop
£841KLM
Mon, 24 Aug - Mon, 7 Sep
Virgin Atlantic Logo
10:11 - 08:35
IAD
-
SOU
17h 24m
2 stops
Virgin Atlantic Logo
09:05 - 15:35
SOU
-
IAD
11h 30m
1 stop
£846Virgin Atlantic
Wed, 6 May - Tue, 12 May
Delta Logo
12:00 - 08:45
DCA
-
SOU
15h 45m
2 stops
Delta Logo
09:15 - 23:12
SOU
-
DCA
18h 57m
2 stops
£853Delta
Wed, 12 Aug - Wed, 26 Aug
Delta Logo
12:55 - 08:45
DCA
-
SOU
14h 50m
2 stops
Delta Logo
09:15 - 23:26
SOU
-
DCA
19h 11m
2 stops
£879Delta
Mon, 3 Aug - Fri, 14 Aug
British Airways Logo
19:25 - 16:50
BWI
-
SOU
16h 25m
2 stops
British Airways Logo
14:55 - 19:45
SOU
-
BWI
33h 50m
2 stops
£3,487British Airways
Tue, 1 Sep - Sat, 5 Sep

KLM flights from Washington, D.C. to Southampton

Our best KLM deals on Washington, D.C. to Southampton flight tickets
KLM
24 Aug
IAD18:10Washington, D.C. Dulles Intl
18h 25m
1 stop
SOU17:35Southampton Eastleigh
7 Sept
SOU17:20Southampton Eastleigh
27h 15m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£837
KLM
24 Aug
IAD18:10Washington, D.C. Dulles Intl
9h 35m
1 stop
SOU08:45Southampton Eastleigh
7 Sept
SOU17:20Southampton Eastleigh
27h 15m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£838
KLM
24 Aug
IAD12:00Washington, D.C. Dulles Intl
15h 45m
2 stops
SOU08:45Southampton Eastleigh
7 Sept
SOU17:20Southampton Eastleigh
27h 15m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£840

Aer Lingus flights from Washington, D.C. to Southampton

Our best Aer Lingus deals on Washington, D.C. to Southampton flight tickets
Aer Lingus
10 May
IAD17:15Washington, D.C. Dulles Intl
10h 25m
1 stop
SOU08:40Southampton Eastleigh
17 May
SOU09:20Southampton Eastleigh
15h 05m
1 stop
IAD19:25Washington, D.C. Dulles Intl
£862
Aer Lingus
17 Sept
IAD20:45Washington, D.C. Dulles Intl
30h 55m
1 stop
SOU08:40Southampton Eastleigh
6 Oct
SOU09:15Southampton Eastleigh
11h 30m
1 stop
IAD15:45Washington, D.C. Dulles Intl
£915
Aer Lingus
29 Aug
IAD20:45Washington, D.C. Dulles Intl
17h 45m
1 stop
SOU19:30Southampton Eastleigh
7 Sept
SOU20:00Southampton Eastleigh
24h 30m
2 stops
IAD15:30Washington, D.C. Dulles Intl
£936

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 29 March 2026.
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

Cheapest return flight

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Thu 17/9

20:45-16:50

1 stop15h 05m

Southampton Eastleigh

Tue 6/10

18:10-19:15

2 stops30h 05m

£780

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Mon 11/5

17:15-08:40

1 stop10h 25m

Southampton Eastleigh

Mon 18/5

19:20-15:10

2 stops24h 50m

£800

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Mon 24/8

18:10-17:35

1 stop18h 25m

Southampton Eastleigh

Mon 7/9

17:20-15:35

1 stop27h 15m

£837

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Mon 24/8

18:10-08:45

1 stop9h 35m

Southampton Eastleigh

Mon 7/9

17:20-15:35

1 stop27h 15m

£838

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Mon 24/8

12:00-08:45

2 stops15h 45m

Southampton Eastleigh

Mon 7/9

17:20-15:35

1 stop27h 15m

£840

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Mon 24/8

12:30-08:45

2 stops15h 15m

Southampton Eastleigh

Mon 7/9

17:20-15:35

1 stop27h 15m

£841
Fastest return journey

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 6/5

10:11-08:35

2 stops17h 24m

Southampton Eastleigh

Tue 12/5

09:05-15:35

1 stop11h 30m

£846

Washington, D.C.Southampton

DCA - SOU

DCASOU

Washington, D.C. Reagan-National

Wed 12/8

12:00-08:45

2 stops15h 45m

Southampton Eastleigh

Wed 26/8

09:15-23:12

2 stops18h 57m

£853

Washington, D.C.Southampton

DCA - SOU

DCASOU

Washington, D.C. Reagan-National

Mon 3/8

12:55-08:45

2 stops14h 50m

Southampton Eastleigh

Fri 14/8

09:15-23:26

2 stops19h 11m

£879

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Tue 1/9

19:25-16:50

2 stops16h 25m

Southampton Eastleigh

Sat 5/9

14:55-19:45

2 stops33h 50m

£3,487

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 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?

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

Which airlines fly to Southampton?

British Airways, Virgin Atlantic and United Airlines 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 52% of people opting to fly with this airline when travelling to Southampton. Keep in mind that there are 7 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

Fastest flight time

9h 25m

Direct flights

None
The fastest flight from Washington, D.C. to Southampton takes 9h 25m
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 25m 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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