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Cheap flights from Washington to London from $535

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 to London departing on 8/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Washington to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:10 pm - 8:40 am
SEA
-
SOU
29h 30m
1 stop
Multiple Airlines Logo
7:25 pm - 10:12 am
SOU
-
SEA
46h 47m
2 stops
$1,022Multiple Airlines
Sat, Sep 12 - Sat, Oct 10
Delta Logo
5:45 pm - 4:50 pm
SEA
-
SOU
15h 05m
1 stop
Delta Logo
5:20 pm - 11:52 am
SOU
-
SEA
26h 32m
1 stop
$1,031Delta
Sun, Sep 27 - Wed, Oct 21
Delta Logo
7:15 am - 8:35 am
SEA
-
SOU
17h 20m
2 stops
Delta Logo
5:20 pm - 11:52 am
SOU
-
SEA
26h 32m
1 stop
$1,036Delta
Sun, Sep 27 - Tue, Oct 20
Delta Logo
11:59 pm - 4:50 pm
SEA
-
SOU
32h 51m
2 stops
Delta Logo
9:05 am - 4:35 pm
SOU
-
SEA
15h 30m
1 stop
$1,048Delta
Sat, Sep 26 - Tue, Oct 20
Delta Logo
5:45 pm - 4:50 pm
SEA
-
SOU
15h 05m
1 stop
Delta Logo
9:05 am - 4:35 pm
SOU
-
SEA
15h 30m
1 stop
$1,081Delta
Thu, Sep 24 - Tue, Oct 20
Delta Logo
5:45 pm - 8:45 am
SEA
-
SOU
31h 00m
1 stop
Delta Logo
6:05 pm - 4:27 pm
SOU
-
SEA
30h 22m
1 stop
$1,090Delta
Wed, Aug 12 - Tue, Aug 18
Delta Logo
7:15 am - 8:45 am
SEA
-
SOU
17h 30m
2 stops
Delta Logo
9:15 am - 11:47 am
SOU
-
SEA
34h 32m
1 stop
$1,094Delta
Tue, Sep 1 - Wed, Sep 16
Delta Logo
9:40 am - 5:35 pm
SEA
-
SOU
23h 55m
2 stops
Delta Logo
6:05 pm - 4:27 pm
SOU
-
SEA
30h 22m
1 stop
$1,095Delta
Wed, Aug 12 - Tue, Aug 18
Delta Logo
11:59 pm - 4:50 pm
SEA
-
SOU
32h 51m
2 stops
Delta Logo
5:20 pm - 11:52 am
SOU
-
SEA
26h 32m
1 stop
$1,098Delta
Sat, Sep 26 - Fri, Oct 16
Aer Lingus Logo
7:10 pm - 7:30 pm
SEA
-
SOU
16h 20m
1 stop
Aer Lingus Logo
9:20 am - 5:10 pm
SOU
-
SEA
15h 50m
1 stop
$1,103Aer Lingus
Fri, Aug 7 - Fri, Aug 14

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Delta flights from State of Washington to Southampton

Our best Delta deals on State of Washington to Southampton flight tickets
Delta
Sep 27
SEA5:45 pmSeattle/Tacoma Intl
15h 05m
1 stop
SOU4:50 pmSouthampton Eastleigh
Oct 21
SOU5:20 pmSouthampton Eastleigh
26h 32m
1 stop
SEA11:52 amSeattle/Tacoma Intl
$1,031
Delta
Sep 27
SEA7:15 amSeattle/Tacoma Intl
17h 20m
2 stops
SOU8:35 amSouthampton Eastleigh
Oct 20
SOU5:20 pmSouthampton Eastleigh
26h 32m
1 stop
SEA11:52 amSeattle/Tacoma Intl
$1,036
Delta
Sep 26
SEA11:59 pmSeattle/Tacoma Intl
32h 51m
2 stops
SOU4:50 pmSouthampton Eastleigh
Oct 20
SOU9:05 amSouthampton Eastleigh
15h 30m
1 stop
SEA4:35 pmSeattle/Tacoma Intl
$1,048

Aer Lingus flights from State of Washington to Southampton

Our best Aer Lingus deals on State of Washington to Southampton flight tickets
Aer Lingus
Aug 7
SEA7:10 pmSeattle/Tacoma Intl
16h 20m
1 stop
SOU7:30 pmSouthampton Eastleigh
Aug 14
SOU9:20 amSouthampton Eastleigh
15h 50m
1 stop
SEA5:10 pmSeattle/Tacoma Intl
$1,103
Aer Lingus
Jul 18
SEA7:10 pmSeattle/Tacoma Intl
29h 30m
1 stop
SOU8:40 amSouthampton Eastleigh
Jul 24
SOU8:00 pmSouthampton Eastleigh
29h 10m
1 stop
SEA5:10 pmSeattle/Tacoma Intl
$1,466

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington 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 June 25, 2026.
Use the filters below to find and compare flights from Washington to Southampton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 9/12

7:10 pm-8:40 am

1 stop29h 30m

Southampton Eastleigh

Sat 10/10

7:25 pm-10:12 am

2 stops46h 47m

$1,022

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 9/27

5:45 pm-4:50 pm

1 stop15h 05m

Southampton Eastleigh

Wed 10/21

5:20 pm-11:52 am

1 stop26h 32m

$1,031

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 9/27

7:15 am-8:35 am

2 stops17h 20m

Southampton Eastleigh

Tue 10/20

5:20 pm-11:52 am

1 stop26h 32m

$1,036

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 9/26

11:59 pm-4:50 pm

2 stops32h 51m

Southampton Eastleigh

Tue 10/20

9:05 am-4:35 pm

1 stop15h 30m

$1,048
Quickest round-trip

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Thu 9/24

5:45 pm-4:50 pm

1 stop15h 05m

Southampton Eastleigh

Tue 10/20

9:05 am-4:35 pm

1 stop15h 30m

$1,081

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Wed 8/12

5:45 pm-8:45 am

1 stop31h 00m

Southampton Eastleigh

Tue 8/18

6:05 pm-4:27 pm

1 stop30h 22m

$1,090

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 9/1

7:15 am-8:45 am

2 stops17h 30m

Southampton Eastleigh

Wed 9/16

9:15 am-11:47 am

1 stop34h 32m

$1,094

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Wed 8/12

9:40 am-5:35 pm

2 stops23h 55m

Southampton Eastleigh

Tue 8/18

6:05 pm-4:27 pm

1 stop30h 22m

$1,095

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 9/26

11:59 pm-4:50 pm

2 stops32h 51m

Southampton Eastleigh

Fri 10/16

5:20 pm-11:52 am

1 stop26h 32m

$1,098

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Fri 8/7

7:10 pm-7:30 pm

1 stop16h 20m

Southampton Eastleigh

Fri 8/14

9:20 am-5:10 pm

1 stop15h 50m

$1,103

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from State of Washington 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

Can stopping save me money on State of Washington to Southampton flights?

You could potentially save up to 26% on your flight if you consider stops on a State of Washington to Southampton flight.

Cheap State of Washington to Southampton flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Southampton

Fastest flight time

13h 40m

Direct flights

None
The fastest flight from State of Washington to Southampton takes 13h 40m
There are no direct flights from State of Washington to Southampton. There are no popular flight routes from State of Washington to Southampton.
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Frequently asked questions about flying from Washington to Southampton

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

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

  • How old do you have to be to fly from Washington to Southampton Eastleigh Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Southampton Eastleigh Airport.

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

    The travel and health documents required for your trip to Southampton Eastleigh Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Southampton Eastleigh Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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 to Southampton?

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

Can I find flights from Washington to Southampton with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Washington to Southampton flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington to Southampton?

Once all potential Washington 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 to Southampton right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Southampton, momondo offers a useful price alert feature which will track prices for flights to Southampton from Washington and alert you when they change.

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