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Cheap flights from Washington to Southampton from £274

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOU
15 Oct — 22 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Washington to Southampton

Keep the following information in mind while searching for Washington to Southampton flight deals. Data was last updated 15 September 2025.

Round-trip from

£613

One-way from

£274

Popular in

June

Cheapest in

October

Average price

£513
Delta
  • Delta
  • 17/11-3/12
  • 2 total stops
  • 59h 30m total
  • Washington to Southampton
Search Deals
1/11
  • 1/11
  • 3 total stops
  • 50h 12m total
  • Washington to Southampton
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£74 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Washington to Southampton

Cheapest flights from Washington to Southampton
Explore the most affordable flight options available from Washington to Southampton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 September 2025.

Mon 17/1115:00SEA - SOU
1 stop33h 10mDelta
Wed 3/1217:30SOU - SEA
1 stop26h 20mDelta
Deal found 15/9£613
Tue 4/1105:45GEG - SOU
2 stops27h 15mKLM
Tue 11/1108:40SOU - GEG
2 stops19h 23mKLM
Deal found 14/9£622
Sat 22/1123:10SEA - SOU
2 stops25h 00mDelta
Tue 2/1217:30SOU - SEA
2 stops29h 29mDelta
Deal found 15/9£623
Mon 17/1115:00SEA - SOU
1 stop18h 00mDelta
Thu 27/1108:50SOU - SEA
2 stops34h 04mDelta
Deal found 15/9£625
Wed 19/1107:20SEA - SOU
2 stops17h 00mDelta
Thu 27/1108:50SOU - SEA
2 stops34h 04mDelta
Deal found 15/9£628
Tue 28/1000:34SEA - SOU
2 stops25h 11mAer Lingus
Wed 5/1112:25SOU - SEA
1 stop13h 55mAer Lingus
Deal found 13/9£630
Mon 17/1115:00SEA - SOU
1 stop18h 00mDelta
Mon 1/1218:05SOU - SEA
1 stop25h 45mDelta
Deal found 15/9£667
Wed 19/1107:20SEA - SOU
2 stops17h 00mDelta
Mon 1/1218:05SOU - SEA
1 stop25h 45mDelta
Deal found 15/9£670
Mon 17/1115:00SEA - SOU
1 stop18h 00mDelta
Fri 28/1108:40SOU - SEA
2 stops19h 55mDelta
Deal found 15/9£675
Wed 19/1107:20SEA - SOU
2 stops17h 00mDelta
Fri 28/1108:40SOU - SEA
2 stops19h 55mDelta
Deal found 15/9£678
Wed 24/914:10SEA - SOU
1 stop18h 50mKLM
Sat 11/1018:05SOU - SEA
1 stop30h 00mKLM
Deal found 13/9£679
Thu 13/1113:16GEG - SOU
2 stops19h 44mDelta
Tue 18/1117:30SOU - GEG
2 stops34h 33mDelta
Deal found 15/9£688

Cheapflights Fare Finder

 
Customise your flight search to find flights from 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, Cheapflights users made 858,174 searches. Data last updated 15 September 2025.
Use the filters below to find and compare flights from Washington to Southampton that are best for you.

Fly from

Washington

Fly to

Southampton

Route

Depart

Return

Price

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 18/11

15:00-08:20

1 stop33h 20m

Southampton Eastleigh

Tue 2/12

17:30-11:50

1 stop26h 20m

£613

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Wed 29/10

16:00-17:25

1 stop18h 25m

Southampton Eastleigh

Wed 5/11

17:30-11:45

1 stop26h 15m

£613

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 17/11

15:00-08:10

1 stop33h 10m

Southampton Eastleigh

Wed 3/12

17:30-11:50

1 stop26h 20m

£613

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 23/11

15:00-08:10

1 stop33h 10m

Southampton Eastleigh

Tue 2/12

17:30-11:50

1 stop26h 20m

£613

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 18/11

15:00-08:20

1 stop33h 20m

Southampton Eastleigh

Wed 3/12

17:30-11:50

1 stop26h 20m

£613

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 23/11

23:55-08:10

2 stops24h 15m

Southampton Eastleigh

Wed 3/12

17:30-11:50

1 stop26h 20m

£616

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 17/11

06:00-08:10

2 stops18h 10m

Southampton Eastleigh

Tue 2/12

17:30-11:50

1 stop26h 20m

£616

SpokaneSouthampton

GEG - SOU

GEGSOU

Spokane

Tue 4/11

05:45-17:00

2 stops27h 15m

Southampton Eastleigh

Tue 11/11

08:40-20:03

2 stops19h 23m

£622

SpokaneSouthampton

GEG - SOU

GEGSOU

Spokane

Tue 4/11

05:45-08:10

2 stops18h 25m

Southampton Eastleigh

Tue 11/11

08:40-20:03

2 stops19h 23m

£622

SpokaneSouthampton

GEG - SOU

GEGSOU

Spokane

Thu 13/11

06:00-08:05

2 stops18h 05m

Southampton Eastleigh

Wed 19/11

08:40-14:54

2 stops38h 14m

£688

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 19 results
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Best time to book a flight from Washington to Southampton

Have a flexible travel schedule? Discover the best time to fly to Southampton from Washington with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Southampton

What is the cheapest month to book a flight from State of Washington to Southampton?

Currently, September is the cheapest month in which you can book a flight from State of Washington to Southampton (average of £203). Flying from State of Washington to Southampton in November is currently the most expensive (average of £262). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Washington to Southampton. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Southampton from Washington?

    Southampton Eastleigh (SOU), located 3.5 mi from the city center, is the airport you fly into when you book flights from Washington to Southampton.

  • How long is the flight from State of Washington to Southampton?

    Airlines like Delta and KLM fly from State of Washington to Southampton in about 27h 15m. The time it takes to get you to your destination can typically vary by up to 6h 05m. The distance from State of Washington to Southampton is about 4645 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Washington to Southampton that include hotel bookings?

    Yes. In addition to deals on Washington to Southampton flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Washington to Southampton?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Southampton.

  • Can I find deals for business class flights from Washington to Southampton?

    Yes. Cheapflights offers flight deals from Washington to Southampton by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from State of Washington to Southampton?

    Currently, September is the cheapest month in which you can book a flight from State of Washington to Southampton (average of £203). Flying from State of Washington to Southampton in November is currently the most expensive (average of £262). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Washington to Southampton

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