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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 23/3. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
8 Feb — 15 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Southampton to Washington

Keep the following information in mind while searching for Southampton to Washington flight deals. Data was last updated 9 January 2026.

Round-trip from

£479

One-way from

£386

Popular in

July

Cheapest in

January

Average price

£473
Delta
  • Delta
  • 9/2-17/2
  • 2 total stops
  • 44h 05m total
  • Southampton to Washington
Search Deals
Aer Lingus
  • Aer Lingus
  • 23/3
  • 1 total stop
  • 16h 50m total
  • Southampton to Washington
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£60 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 January 2026
Search Deals

Find 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 9 January 2026.

Mon 9/217:35SOU - SEA
1 stop26h 05mDelta
Tue 17/215:05SEA - SOU
1 stop18h 00mDelta
Deal found 5/1£479
Thu 9/417:20SOU - SEA
1 stop31h 10mVirgin Atlantic
Sat 11/417:30SEA - SOU
2 stops39h 20mVirgin Atlantic
Deal found 6/1£483
Mon 9/209:25SOU - SEA
1 stop34h 15mDelta
Sun 15/215:05SEA - SOU
1 stop33h 45mDelta
Deal found 5/1£494
Mon 9/217:35SOU - SEA
1 stop26h 05mDelta
Wed 18/209:45SEA - SOU
2 stops23h 20mDelta
Deal found 5/1£498
Thu 9/409:05SOU - SEA
1 stop15h 25mKLM
Sat 11/419:45SEA - SOU
2 stops37h 05mKLM
Deal found 7/1£501
Thu 12/217:35SOU - SEA
1 stop26h 05mDelta
Mon 16/215:05SEA - SOU
1 stop18h 00mDelta
Deal found 5/1£508
Fri 13/217:35SOU - SEA
1 stop26h 05mDelta
Tue 17/215:05SEA - SOU
1 stop18h 00mDelta
Deal found 5/1£523
Fri 13/217:35SOU - SEA
1 stop26h 05mDelta
Sun 15/215:05SEA - SOU
1 stop33h 45mDelta
Deal found 5/1£539
Thu 11/609:05SOU - SEA
2 stops19h 23mDelta
Sun 30/817:45SEA - SOU
2 stops30h 50mDelta
Deal found 6/1£551
Sat 6/617:20SOU - SEA
2 stops29h 25mDelta
Sat 29/817:40SEA - SOU
1 stop30h 55mDelta
Deal found 6/1£561

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 9 January 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

Tue 10/2

17:35-11:40

1 stop26h 05m

Seattle/Tacoma Intl

Tue 17/2

15:05-17:05

1 stop18h 00m

£479

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 9/2

17:35-11:40

1 stop26h 05m

Seattle/Tacoma Intl

Mon 16/2

15:05-17:05

1 stop18h 00m

£479

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 9/2

17:35-11:40

1 stop26h 05m

Seattle/Tacoma Intl

Tue 17/2

15:05-17:05

1 stop18h 00m

£479

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 11/2

17:35-11:40

1 stop26h 05m

Seattle/Tacoma Intl

Tue 17/2

15:05-17:05

1 stop18h 00m

£479

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 11/2

17:35-11:40

1 stop26h 05m

Seattle/Tacoma Intl

Wed 18/2

15:05-17:05

1 stop18h 00m

£479

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 9/4

17:20-16:30

1 stop31h 10m

Seattle/Tacoma Intl

Sat 11/4

17:30-16:50

2 stops39h 20m

£483

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 11/2

17:35-11:40

1 stop26h 05m

Seattle/Tacoma Intl

Sun 15/2

15:05-08:50

1 stop33h 45m

£494

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 9/2

09:25-11:40

1 stop34h 15m

Seattle/Tacoma Intl

Sun 15/2

15:05-08:50

1 stop33h 45m

£494

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 12/2

17:35-11:40

1 stop26h 05m

Seattle/Tacoma Intl

Tue 17/2

15:05-17:05

1 stop18h 00m

£508

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 12/2

17:35-11:40

1 stop26h 05m

Seattle/Tacoma Intl

Mon 16/2

15:05-17:05

1 stop18h 00m

£508

Flights are sorted by cheapest return flights first.

Deals found on 6/1

Showing 1-10 of 15 results
1
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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 £302). Flying from Southampton to State of Washington in August is currently the most expensive (average of £461). 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 05m. 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 £302). Flying from Southampton to State of Washington in August is currently the most expensive (average of £461). 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

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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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