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Cheap flights from Washington to London from £340

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 3/9. 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.
Delta Logo
17:45 - 08:35
SEA
-
SOU
30h 50m
1 stop
Delta Logo
09:05 - 16:35
SOU
-
SEA
15h 30m
1 stop
£765Delta
Sun, 20 Sep - Fri, 23 Oct
Delta Logo
23:59 - 08:45
SEA
-
SOU
24h 46m
2 stops
Delta Logo
17:20 - 11:47
SOU
-
SEA
26h 27m
1 stop
£768Delta
Mon, 31 Aug - Wed, 16 Sep
Delta Logo
23:59 - 08:35
SEA
-
SOU
24h 36m
2 stops
Delta Logo
17:20 - 16:35
SOU
-
SEA
31h 15m
1 stop
£769Delta
Sat, 19 Sep - Thu, 22 Oct
Delta Logo
14:35 - 17:00
SEA
-
SOU
18h 25m
1 stop
Delta Logo
08:40 - 23:59
SOU
-
SEA
23h 19m
2 stops
£773Delta
Sun, 1 Nov - Fri, 20 Nov
Delta Logo
08:25 - 08:10
SEA
-
SOU
15h 45m
2 stops
Delta Logo
17:30 - 16:35
SOU
-
SEA
31h 05m
2 stops
£776Delta
Wed, 4 Nov - Mon, 16 Nov
Delta Logo
13:50 - 08:35
SEA
-
SOU
34h 45m
1 stop
Delta Logo
09:05 - 16:35
SOU
-
SEA
15h 30m
1 stop
£778Delta
Sun, 30 Aug - Tue, 15 Sep
Delta Logo
09:53 - 08:35
SEA
-
SOU
38h 42m
2 stops
Delta Logo
17:20 - 11:47
SOU
-
SEA
26h 27m
1 stop
£781Delta
Sun, 30 Aug - Thu, 17 Sep
Delta Logo
17:45 - 08:35
SEA
-
SOU
30h 50m
1 stop
Delta Logo
17:20 - 19:21
SOU
-
SEA
34h 01m
2 stops
£785Delta
Sun, 30 Aug - Mon, 14 Sep
Delta Logo
23:59 - 08:35
SEA
-
SOU
24h 36m
2 stops
Delta Logo
09:05 - 22:50
SOU
-
SEA
21h 45m
2 stops
£789Delta
Sun, 30 Aug - Tue, 15 Sep
Delta Logo
17:45 - 16:50
SEA
-
SOU
15h 05m
1 stop
Delta Logo
17:20 - 11:52
SOU
-
SEA
26h 32m
1 stop
£802Delta
Thu, 24 Sep - Mon, 19 Oct

Delta flights from State of Washington to Southampton

Our best Delta deals on State of Washington to Southampton flight tickets
Delta
20 Sept
SEA17:45Seattle/Tacoma Intl
30h 50m
1 stop
SOU08:35Southampton Eastleigh
23 Oct
SOU09:05Southampton Eastleigh
15h 30m
1 stop
SEA16:35Seattle/Tacoma Intl
£765
Delta
31 Aug
SEA23:59Seattle/Tacoma Intl
24h 46m
2 stops
SOU08:45Southampton Eastleigh
16 Sept
SOU17:20Southampton Eastleigh
26h 27m
1 stop
SEA11:47Seattle/Tacoma Intl
£768
Delta
19 Sept
SEA23:59Seattle/Tacoma Intl
24h 36m
2 stops
SOU08:35Southampton Eastleigh
22 Oct
SOU17:20Southampton Eastleigh
31h 15m
1 stop
SEA16:35Seattle/Tacoma Intl
£769

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 31 May 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 return flight

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 20/9

17:45-08:35

1 stop30h 50m

Southampton Eastleigh

Fri 23/10

09:05-16:35

1 stop15h 30m

£765

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 31/8

23:59-08:45

2 stops24h 46m

Southampton Eastleigh

Wed 16/9

17:20-11:47

1 stop26h 27m

£768

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 19/9

23:59-08:35

2 stops24h 36m

Southampton Eastleigh

Thu 22/10

17:20-16:35

1 stop31h 15m

£769

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 1/11

14:35-17:00

1 stop18h 25m

Southampton Eastleigh

Fri 20/11

08:40-23:59

2 stops23h 19m

£773

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Wed 4/11

08:25-08:10

2 stops15h 45m

Southampton Eastleigh

Mon 16/11

17:30-16:35

2 stops31h 05m

£776

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 30/8

13:50-08:35

1 stop34h 45m

Southampton Eastleigh

Tue 15/9

09:05-16:35

1 stop15h 30m

£778

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 30/8

09:53-08:35

2 stops38h 42m

Southampton Eastleigh

Thu 17/9

17:20-11:47

1 stop26h 27m

£781

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 30/8

17:45-08:35

1 stop30h 50m

Southampton Eastleigh

Mon 14/9

17:20-19:21

2 stops34h 01m

£785

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 30/8

23:59-08:35

2 stops24h 36m

Southampton Eastleigh

Tue 15/9

09:05-22:50

2 stops21h 45m

£789
Fastest return journey

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Thu 24/9

17:45-16:50

1 stop15h 05m

Southampton Eastleigh

Mon 19/10

17:20-11:52

1 stop26h 32m

£802

Flights are sorted by cheapest return 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

What is the cheapest airline that flies from Washington to Southampton Eastleigh?

KLM and Aer Lingus are the most popular carriers operating from Washington to Southampton Eastleigh

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 were last updated today.

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 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 to Southampton?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Southampton from Washington.

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

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

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Southampton from Washington.

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

Yes momondo offers price alerts on flights to Southampton from Washington. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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