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Cheap flights from Washington, D.C. to London from $598

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 11/11. 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 round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:05 pm - 5:00 pmIAD-SOU
17h 55m1 stop
Delta Logo
8:40 am - 5:05 pmSOU-IAD
12h 25m1 stop
$767Delta
Find Deal
Tue, Mar 3 - Tue, Mar 10
Delta Logo
12:35 pm - 8:10 amIAD-SOU
14h 35m2 stops
Delta Logo
8:40 am - 5:05 pmSOU-IAD
12h 25m1 stop
$772Delta
Find Deal
Tue, Mar 3 - Tue, Mar 10
Virgin Atlantic Logo
5:50 pm - 5:00 pmIAD-SOU
18h 10m1 stop
Virgin Atlantic Logo
9:20 am - 3:35 pmSOU-IAD
11h 15m1 stop
$780Virgin Atlantic
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Wed, Apr 29 - Sun, May 3
Multiple Airlines Logo
5:30 pm - 5:20 pmIAD-SOU
18h 50m2 stops
Multiple Airlines Logo
3:20 pm - 10:00 pmSOU-IAD
34h 40m3 stops
$781Multiple Airlines
Find Deal
Tue, Mar 3 - Tue, Mar 10
Virgin Atlantic Logo
5:50 pm - 8:45 amIAD-SOU
9h 55m1 stop
Virgin Atlantic Logo
9:20 am - 3:35 pmSOU-IAD
11h 15m1 stop
$783Virgin Atlantic
Find Deal
Wed, Apr 29 - Sun, May 3
KLM Logo
11:00 am - 8:45 amDCA-SOU
16h 45m2 stops
KLM Logo
5:35 pm - 10:26 amSOU-DCA
21h 51m2 stops
$847KLM
Find Deal
Wed, Apr 22 - Sun, Apr 26
Multiple Airlines Logo
5:30 pm - 5:20 pmIAD-SOU
18h 50m3 stops
Multiple Airlines Logo
3:20 pm - 10:00 pmSOU-IAD
34h 40m3 stops
$853Multiple Airlines
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Tue, Mar 3 - Tue, Mar 10
KLM Logo
7:05 pm - 5:00 pmIAD-SOU
17h 55m1 stop
KLM Logo
5:35 pm - 3:35 pmSOU-IAD
27h 00m1 stop
$873KLM
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Thu, Mar 26 - Mon, Apr 6
Aer Lingus Logo
9:00 pm - 11:55 amIAD-SOU
9h 55m1 stop
Aer Lingus Logo
8:10 pm - 3:35 pmSOU-IAD
24h 25m1 stop
$992Aer Lingus
Find Deal
Tue, Dec 2 - Thu, Dec 11
Aer Lingus Logo
5:05 pm - 8:45 amIAD-SOU
10h 40m1 stop
Aer Lingus Logo
8:10 pm - 3:35 pmSOU-IAD
24h 25m1 stop
$999Aer Lingus
Find Deal
Wed, Feb 11 - Sun, Feb 15

Delta flights from Washington, D.C. to Southampton

Our best Delta deals on Washington, D.C. to Southampton flight tickets
Delta
Mar 3
IAD6:05 pmWashington, D.C. Dulles Intl
17h 55m
1 stop
SOU5:00 pmSouthampton Eastleigh
Mar 10
SOU8:40 amSouthampton Eastleigh
12h 25m
1 stop
IAD5:05 pmWashington, D.C. Dulles Intl
$767
Find similar
Delta
Mar 3
IAD12:35 pmWashington, D.C. Dulles Intl
14h 35m
2 stops
SOU8:10 amSouthampton Eastleigh
Mar 10
SOU8:40 amSouthampton Eastleigh
12h 25m
1 stop
IAD5:05 pmWashington, D.C. Dulles Intl
$772
Find similar
Delta
Mar 3
BWI11:45 amBaltimore/Washington
15h 25m
2 stops
SOU8:10 amSouthampton Eastleigh
Mar 10
SOU8:40 amSouthampton Eastleigh
18h 19m
2 stops
BWI10:59 pmBaltimore/Washington
$782
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
Dec 2
IAD9:00 pmWashington, D.C. Dulles Intl
9h 55m
1 stop
SOU11:55 amSouthampton Eastleigh
Dec 11
SOU8:10 pmSouthampton Eastleigh
24h 25m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$992
Find similar
Aer Lingus
Feb 11
IAD5:05 pmWashington, D.C. Dulles Intl
10h 40m
1 stop
SOU8:45 amSouthampton Eastleigh
Feb 15
SOU8:10 pmSouthampton Eastleigh
24h 25m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$999
Find similar
Aer Lingus
Feb 10
IAD5:05 pmWashington, D.C. Dulles Intl
13h 50m
1 stop
SOU11:55 amSouthampton Eastleigh
Feb 15
SOU8:10 pmSouthampton Eastleigh
24h 25m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,001
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated November 6, 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

Tue 3/3

6:05 pm-5:00 pm

1 stop17h 55m

Southampton Eastleigh

Tue 3/10

8:40 am-5:05 pm

1 stop12h 25m

$767

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Tue 3/3

12:35 pm-8:10 am

2 stops14h 35m

Southampton Eastleigh

Tue 3/10

8:40 am-5:05 pm

1 stop12h 25m

$772

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 4/29

5:50 pm-5:00 pm

1 stop18h 10m

Southampton Eastleigh

Sun 5/3

9:20 am-3:35 pm

1 stop11h 15m

$780

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Tue 3/3

5:30 pm-5:20 pm

2 stops18h 50m

Southampton Eastleigh

Tue 3/10

3:20 pm-10:00 pm

3 stops34h 40m

$781

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 4/29

5:50 pm-8:45 am

1 stop9h 55m

Southampton Eastleigh

Sun 5/3

9:20 am-3:35 pm

1 stop11h 15m

$783

Washington, D.C.Southampton

DCA - SOU

DCASOU

Washington, D.C. Reagan-National

Wed 4/22

11:00 am-8:45 am

2 stops16h 45m

Southampton Eastleigh

Sun 4/26

5:35 pm-10:26 am

2 stops21h 51m

$847

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Tue 3/3

5:30 pm-5:20 pm

3 stops18h 50m

Southampton Eastleigh

Tue 3/10

3:20 pm-10:00 pm

3 stops34h 40m

$853

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Thu 3/26

7:05 pm-5:00 pm

1 stop17h 55m

Southampton Eastleigh

Mon 4/6

5:35 pm-3:35 pm

1 stop27h 00m

$873

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Tue 12/2

9:00 pm-11:55 am

1 stop9h 55m

Southampton Eastleigh

Thu 12/11

8:10 pm-3:35 pm

1 stop24h 25m

$992

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 2/11

5:05 pm-8:45 am

1 stop10h 40m

Southampton Eastleigh

Sun 2/15

8:10 pm-3:35 pm

1 stop24h 25m

$999

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 day to depart on your flight to Southampton?

On average, the least expensive day to fly to Southampton from Washington, D.C. is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $859. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. to Southampton for around $1,103.

What is the cheapest time of day to depart on your flight to Southampton?

Flying to Southampton from Washington, D.C. in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $936 when looking at flights departing in the afternoon. Flights to Southampton are more costly in the morning, with an average ticket price of $1,201. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Washington, D.C. to Southampton flights?

You could potentially save up to 38% on your flight if you consider stops on a Washington, D.C. to Southampton flight.

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 round-trip 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.
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  • 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. A reasonable flight in good conditions will take 9h 45m.

  • 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 were last updated today.

  • How many operators does momondo search for flights from Washington, D.C. to Southampton Eastleigh Airport?

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, 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.

  • What is the most popular airline from Washington, D.C. to Southampton?

Best airlines flying from Washington, D.C. to Southampton

Compare and see reviews for airlines that fly from Washington, D.C. to Southampton with momondo
Airline
Rating
Free Cancellation
Price
Aer LingusPriceFrom $677Free CancellationRating
7.2
1,365 reviews
Search Aer Lingus flights
DeltaPriceFrom $785Free CancellationRating
7.9
8,001 reviews
Search Delta flights

Traveling 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?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to Southampton. momondo saves you time and could save you money on your trip.

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

All flight searches from Washington, D.C. to Southampton on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Washington, D.C. to Southampton flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for Washington, D.C. to Southampton flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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