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Cheap flights from Washington, D.C. to London from £345

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 27/1. 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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Find the cheapest flights from Washington, D.C. to London

Cheap return flights

Enter your travel dates to find the best prices.
Delta Logo
18:59 - 17:05
BWI
-
SOU
17h 06m2 stops
Delta Logo
09:00 - 22:53
SOU
-
BWI
18h 53m2 stops
£583Delta
Thu, 5 Feb - Thu, 12 Feb
Delta Logo
19:59 - 17:25
IAD
-
SOU
17h 26m2 stops
Delta Logo
17:20 - 15:35
SOU
-
IAD
27h 15m1 stop
£587Delta
Wed, 25 Mar - Mon, 6 Apr
Delta Logo
20:45 - 17:25
DCA
-
SOU
16h 40m2 stops
Delta Logo
09:15 - 20:27
SOU
-
DCA
16h 12m2 stops
£594Delta
Wed, 25 Mar - Sat, 4 Apr
Aer Lingus Logo
17:05 - 08:45
IAD
-
SOU
10h 40m1 stop
Aer Lingus Logo
20:10 - 15:35
SOU
-
IAD
24h 25m1 stop
£747Aer Lingus
Thu, 12 Feb - Mon, 16 Feb
Aer Lingus Logo
17:20 - 08:40
IAD
-
SOU
10h 20m1 stop
Aer Lingus Logo
17:05 - 15:50
SOU
-
IAD
27h 45m1 stop
£766Aer Lingus
Sun, 19 Apr - Sat, 25 Apr
Aer Lingus Logo
17:20 - 16:35
IAD
-
SOU
18h 15m1 stop
Aer Lingus Logo
09:10 - 15:50
SOU
-
IAD
11h 40m1 stop
£847Aer Lingus
Fri, 22 May - Sun, 31 May
Multiple Airlines Logo
19:40 - 17:10
BWI
-
SOU
16h 30m2 stops
Multiple Airlines Logo
09:30 - 19:01
SOU
-
BWI
38h 31m3 stops
£860Multiple Airlines
Thu, 5 Feb - Thu, 12 Feb
KLM Logo
17:40 - 08:45
IAD
-
SOU
10h 05m1 stop
KLM Logo
09:15 - 19:16
SOU
-
IAD
15h 01m2 stops
£865KLM
Fri, 22 May - Sun, 31 May
Multiple Airlines Logo
19:40 - 08:25
BWI
-
SOU
31h 45m3 stops
Multiple Airlines Logo
09:30 - 19:01
SOU
-
BWI
38h 31m3 stops
£995Multiple Airlines
Thu, 5 Feb - Thu, 12 Feb
British Airways Logo
20:35 - 21:00
BWI
-
SOU
19h 25m2 stops
British Airways Logo
20:30 - 18:45
SOU
-
BWI
51h 15m2 stops
£3,320British Airways
Thu, 29 Jan - Mon, 2 Feb

Delta flights from Washington, D.C. to Southampton

Our best Delta deals on Washington, D.C. to Southampton flight tickets
Delta
5 Feb
BWI18:59Baltimore/Washington
17h 06m
2 stops
SOU17:05Southampton Eastleigh
12 Feb
SOU09:00Southampton Eastleigh
18h 53m
2 stops
BWI22:53Baltimore/Washington
£583
Find similar
Delta
25 Mar
IAD19:59Washington, D.C. Dulles Intl
17h 26m
2 stops
SOU17:25Southampton Eastleigh
6 Apr
SOU17:20Southampton Eastleigh
27h 15m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£587
Find similar
Delta
25 Mar
DCA20:45Washington, D.C. Reagan-National
16h 40m
2 stops
SOU17:25Southampton Eastleigh
4 Apr
SOU09:15Southampton Eastleigh
16h 12m
2 stops
DCA20:27Washington, D.C. Reagan-National
£594
Find similar

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

Our best Aer Lingus deals on Washington, D.C. to Southampton flight tickets
Aer Lingus
12 Feb
IAD17:05Washington, D.C. Dulles Intl
10h 40m
1 stop
SOU08:45Southampton Eastleigh
16 Feb
SOU20:10Southampton Eastleigh
24h 25m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£747
Find similar
Aer Lingus
19 Apr
IAD17:20Washington, D.C. Dulles Intl
10h 20m
1 stop
SOU08:40Southampton Eastleigh
25 Apr
SOU17:05Southampton Eastleigh
27h 45m
1 stop
IAD15:50Washington, D.C. Dulles Intl
£766
Find similar
Aer Lingus
18 May
IAD17:20Washington, D.C. Dulles Intl
10h 20m
1 stop
SOU08:40Southampton Eastleigh
28 May
SOU20:00Southampton Eastleigh
24h 50m
1 stop
IAD15:50Washington, D.C. Dulles Intl
£807
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 23 December 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

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Thu 5/2

18:59-17:05

2 stops17h 06m

Southampton Eastleigh

Thu 12/2

09:00-22:53

2 stops18h 53m

£583

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 25/3

19:59-17:25

2 stops17h 26m

Southampton Eastleigh

Mon 6/4

17:20-15:35

1 stop27h 15m

£587

Washington, D.C.Southampton

DCA - SOU

DCASOU

Washington, D.C. Reagan-National

Wed 25/3

20:45-17:25

2 stops16h 40m

Southampton Eastleigh

Sat 4/4

09:15-20:27

2 stops16h 12m

£594

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Thu 12/2

17:05-08:45

1 stop10h 40m

Southampton Eastleigh

Mon 16/2

20:10-15:35

1 stop24h 25m

£747

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sun 19/4

17:20-08:40

1 stop10h 20m

Southampton Eastleigh

Sat 25/4

17:05-15:50

1 stop27h 45m

£766

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Fri 22/5

17:20-16:35

1 stop18h 15m

Southampton Eastleigh

Sun 31/5

09:10-15:50

1 stop11h 40m

£846

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Thu 5/2

19:40-17:10

2 stops16h 30m

Southampton Eastleigh

Thu 12/2

09:30-19:01

3 stops38h 31m

£860

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Fri 22/5

17:40-08:45

1 stop10h 05m

Southampton Eastleigh

Sun 31/5

09:15-19:16

2 stops15h 01m

£865

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Thu 5/2

19:40-08:25

3 stops31h 45m

Southampton Eastleigh

Thu 12/2

09:30-19:01

3 stops38h 31m

£995

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Thu 29/1

20:35-21:00

2 stops19h 25m

Southampton Eastleigh

Mon 2/2

20:30-18:45

2 stops51h 15m

£3,320

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?

Virgin Atlantic, 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 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 47% of people opting to fly with this airline when travelling to Southampton. Keep in mind that there are 8 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 55m

Direct flights

None
The fastest flight from Washington, D.C. to Southampton takes 9h 55m
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 55m 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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