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Cheap flights from Washington to London from $517

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 9/3. 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

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:00 pm - 5:40 pm
SEA
-
SOU
38h 40m
2 stops
Multiple Airlines Logo
9:20 am - 5:10 pm
SOU
-
SEA
15h 50m
1 stop
$1,036Multiple Airlines
Mon, May 4 - Mon, May 11
Delta Logo
1:45 pm - 8:35 am
SEA
-
SOU
34h 50m
1 stop
Delta Logo
5:20 pm - 11:45 am
SOU
-
SEA
26h 25m
1 stop
$1,042Delta
Sun, Apr 19 - Mon, Apr 27
KLM Logo
1:45 pm - 4:50 pm
SEA
-
SOU
19h 05m
1 stop
KLM Logo
9:05 am - 11:45 am
SOU
-
SEA
34h 40m
1 stop
$1,043KLM
Tue, Apr 14 - Tue, Apr 21
Delta Logo
11:11 pm - 8:35 am
SEA
-
SOU
25h 24m
2 stops
Delta Logo
5:20 pm - 11:40 am
SOU
-
SEA
26h 20m
1 stop
$1,046Delta
Sat, Apr 18 - Wed, Apr 29
KLM Logo
3:35 pm - 4:50 pm
SEA
-
SOU
17h 15m
2 stops
KLM Logo
9:05 am - 11:45 am
SOU
-
SEA
34h 40m
1 stop
$1,047KLM
Tue, Apr 14 - Tue, Apr 21
KLM Logo
3:35 pm - 4:50 pm
SEA
-
SOU
17h 15m
2 stops
KLM Logo
9:05 am - 8:42 pm
SOU
-
SEA
19h 37m
2 stops
$1,057KLM
Tue, Apr 14 - Tue, Apr 21
Delta Logo
5:35 pm - 4:50 pm
SEA
-
SOU
15h 15m
1 stop
Delta Logo
9:05 am - 4:30 pm
SOU
-
SEA
15h 25m
1 stop
$1,091Delta
Sun, May 3 - Wed, May 20
Delta Logo
5:35 pm - 8:45 am
SEA
-
SOU
31h 10m
1 stop
Delta Logo
9:05 am - 4:30 pm
SOU
-
SEA
15h 25m
1 stop
$1,092Delta
Fri, Apr 17 - Tue, Apr 28
KLM Logo
1:45 pm - 4:50 pm
SEA
-
SOU
19h 05m
1 stop
KLM Logo
5:20 pm - 4:30 pm
SOU
-
SEA
31h 10m
1 stop
$1,093KLM
Tue, Apr 14 - Sat, Apr 25
Delta Logo
11:11 pm - 4:50 pm
SEA
-
SOU
33h 39m
2 stops
Delta Logo
5:20 pm - 11:42 am
SOU
-
SEA
26h 22m
1 stop
$1,096Delta
Sat, May 2 - Wed, May 20

Delta flights from State of Washington to Southampton

Our best Delta deals on State of Washington to Southampton flight tickets
Delta
Apr 19
SEA1:45 pmSeattle/Tacoma Intl
34h 50m
1 stop
SOU8:35 amSouthampton Eastleigh
Apr 27
SOU5:20 pmSouthampton Eastleigh
26h 25m
1 stop
SEA11:45 amSeattle/Tacoma Intl
$1,042
Delta
Apr 18
SEA11:11 pmSeattle/Tacoma Intl
25h 24m
2 stops
SOU8:35 amSouthampton Eastleigh
Apr 29
SOU5:20 pmSouthampton Eastleigh
26h 20m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$1,046
Delta
May 3
SEA5:35 pmSeattle/Tacoma Intl
15h 15m
1 stop
SOU4:50 pmSouthampton Eastleigh
May 20
SOU9:05 amSouthampton Eastleigh
15h 25m
1 stop
SEA4:30 pmSeattle/Tacoma Intl
$1,091

KLM flights from State of Washington to Southampton

Our best KLM deals on State of Washington to Southampton flight tickets
KLM
Apr 14
SEA1:45 pmSeattle/Tacoma Intl
19h 05m
1 stop
SOU4:50 pmSouthampton Eastleigh
Apr 21
SOU9:05 amSouthampton Eastleigh
34h 40m
1 stop
SEA11:45 amSeattle/Tacoma Intl
$1,043
KLM
Apr 14
SEA3:35 pmSeattle/Tacoma Intl
17h 15m
2 stops
SOU4:50 pmSouthampton Eastleigh
Apr 21
SOU9:05 amSouthampton Eastleigh
34h 40m
1 stop
SEA11:45 amSeattle/Tacoma Intl
$1,047
KLM
Apr 14
SEA3:35 pmSeattle/Tacoma Intl
17h 15m
2 stops
SOU4:50 pmSouthampton Eastleigh
Apr 21
SOU9:05 amSouthampton Eastleigh
19h 37m
2 stops
SEA8:42 pmSeattle/Tacoma Intl
$1,057

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 March 21, 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

Mon 5/4

7:00 pm-5:40 pm

2 stops38h 40m

Southampton Eastleigh

Mon 5/11

9:20 am-5:10 pm

1 stop15h 50m

$1,036

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 4/19

1:45 pm-8:35 am

1 stop34h 50m

Southampton Eastleigh

Mon 4/27

5:20 pm-11:45 am

1 stop26h 25m

$1,042

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 4/14

1:45 pm-4:50 pm

1 stop19h 05m

Southampton Eastleigh

Tue 4/21

9:05 am-11:45 am

1 stop34h 40m

$1,043

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 4/18

11:11 pm-8:35 am

2 stops25h 24m

Southampton Eastleigh

Wed 4/29

5:20 pm-11:40 am

1 stop26h 20m

$1,046

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 4/14

3:35 pm-4:50 pm

2 stops17h 15m

Southampton Eastleigh

Tue 4/21

9:05 am-11:45 am

1 stop34h 40m

$1,047

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 4/14

3:35 pm-4:50 pm

2 stops17h 15m

Southampton Eastleigh

Tue 4/21

9:05 am-8:42 pm

2 stops19h 37m

$1,057
Quickest round-trip

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 5/3

5:35 pm-4:50 pm

1 stop15h 15m

Southampton Eastleigh

Wed 5/20

9:05 am-4:30 pm

1 stop15h 25m

$1,091

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Fri 4/17

5:35 pm-8:45 am

1 stop31h 10m

Southampton Eastleigh

Tue 4/28

9:05 am-4:30 pm

1 stop15h 25m

$1,092

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 4/14

1:45 pm-4:50 pm

1 stop19h 05m

Southampton Eastleigh

Sat 4/25

5:20 pm-4:30 pm

1 stop31h 10m

$1,093

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 5/2

11:11 pm-4:50 pm

2 stops33h 39m

Southampton Eastleigh

Wed 5/20

5:20 pm-11:42 am

1 stop26h 22m

$1,096

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 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.
Search flight deals

  • 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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