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Cheap flights from Southampton to Washington from £386

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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
5 Mar — 12 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Southampton to Washington

Enter your travel dates to find the best prices.

Cheapest flights from Southampton to Washington
Explore the most affordable flight options available from Southampton to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 February 2026.

Mon 20/409:05
SOU
-
SEA
1 stop15h 25m
Delta
Mon 27/417:30
SEA
-
SOU
1 stop15h 20m
Delta
Deal found 1/2£675
Fri 17/417:20
SOU
-
SEA
1 stop26h 25m
Delta
Tue 28/413:45
SEA
-
SOU
1 stop19h 05m
Delta
Deal found 1/2£705
Sun 19/417:20
SOU
-
SEA
1 stop26h 25m
Delta
Tue 28/407:15
SEA
-
SOU
2 stops25h 35m
Delta
Deal found 1/2£709
Fri 17/417:20
SOU
-
SEA
2 stops29h 22m
Delta
Thu 23/409:00
SEA
-
SOU
2 stops23h 50m
Delta
Deal found 1/2£709
Fri 17/417:20
SOU
-
SEA
1 stop26h 25m
Delta
Fri 24/409:00
SEA
-
SOU
2 stops15h 45m
Delta
Deal found 1/2£735
Thu 23/409:05
SOU
-
SEA
1 stop15h 25m
Delta
Sat 25/415:35
SEA
-
SOU
2 stops33h 00m
Delta
Deal found 1/2£739
Sun 19/417:20
SOU
-
SEA
1 stop26h 25m
Delta
Sat 25/415:35
SEA
-
SOU
2 stops33h 00m
Delta
Deal found 1/2£743
Wed 4/312:25
SOU
-
SEA
1 stop13h 55m
British Airways
Sun 8/321:05
SEA
-
SOU
1 stop15h 35m
British Airways
Deal found 1/2£758

Find flight deals from Southampton to Washington

Keep the following information in mind while searching for Southampton to Washington flight deals. Data was last updated 3 February 2026.

Round-trip from

£675

One-way from

£386

Popular in

July

Cheapest in

February

Average price

£450
Delta
  • Delta
  • 20/4-27/4
  • 2 total stops
  • 30h 45m total
  • Southampton to Washington
Search Deals
8/3
  • 8/3
  • 3 total stops
  • 50h 19m total
  • Southampton to Washington
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£58 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Southampton to Washington 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 3 February 2026.
Use the filters below to find and compare flights from Southampton to Washington that are best for you.

Fly from

Southampton

Fly to

Washington

Route

Depart

Return

Price

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 17/4

17:20-11:45

1 stop26h 25m

Seattle/Tacoma Intl

Mon 27/4

06:00-08:35

2 stops18h 35m

£705

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 23/4

17:20-11:45

1 stop26h 25m

Seattle/Tacoma Intl

Sun 26/4

23:59-08:35

2 stops24h 36m

£705

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 23/4

17:20-11:45

1 stop26h 25m

Seattle/Tacoma Intl

Mon 27/4

09:00-16:50

2 stops23h 50m

£705

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 17/4

17:20-11:45

1 stop26h 25m

Seattle/Tacoma Intl

Sun 26/4

23:59-08:35

2 stops24h 36m

£705

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 23/4

09:05-16:30

1 stop15h 25m

Seattle/Tacoma Intl

Tue 28/4

13:45-16:50

1 stop19h 05m

£705

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 17/4

17:20-11:45

1 stop26h 25m

Seattle/Tacoma Intl

Thu 23/4

07:15-16:50

2 stops25h 35m

£705

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 17/4

17:20-11:45

1 stop26h 25m

Seattle/Tacoma Intl

Tue 28/4

13:45-16:50

1 stop19h 05m

£705

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 20/4

17:20-11:45

1 stop26h 25m

Seattle/Tacoma Intl

Mon 27/4

09:00-16:50

2 stops23h 50m

£709

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 22/4

09:05-16:30

1 stop15h 25m

Seattle/Tacoma Intl

Sun 26/4

23:59-08:35

2 stops24h 36m

£709

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 19/4

17:20-16:30

1 stop31h 10m

Seattle/Tacoma Intl

Tue 28/4

13:45-16:50

1 stop19h 05m

£709

Flights are sorted by cheapest return flights first.

Deals found on 3/2

Showing 1-10 of 16 results
1
2

Best time to book a flight from Southampton to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Southampton 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 Southampton to Washington

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

Currently, March is the cheapest month in which you can book a flight from Southampton to State of Washington (average of £298). Flying from Southampton to State of Washington in August is currently the most expensive (average of £451). 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 Southampton to Washington. 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 from for flights from Southampton to Washington?

    Southampton Eastleigh (SOU) is the airport you will fly out of if you book a flight from Southampton to Washington. It is only a 3.5 mi journey to Eastleigh (SOU) from Southampton’s city center.

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

    Departing from Southampton to State of Washington will take you 26h 25m. The distance from Southampton to State of Washington is about 4787 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Southampton to Washington 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 Southampton to State of Washington?

    Currently, March is the cheapest month in which you can book a flight from Southampton to State of Washington (average of £298). Flying from Southampton to State of Washington in August is currently the most expensive (average of £451). 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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Fly with Cheapflights

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How does Cheapflights help users find flights from Southampton to Washington?

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Why should you use Cheapflights to find cheap flight tickets from Southampton to Washington?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Washington from Southampton.

Can Cheapflights find flights from Southampton to Washington with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Southampton to Washington, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Southampton to Washington become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Washington from Southampton today and book when prices fit your budget.

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