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Cheap flights from Southampton to Washington from £408

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
4 Jan — 11 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Southampton to Washington

Enter your travel dates to find the best prices.

Best flights from Southampton to Washington
Discover carefully curated flight deals from Southampton to Washington that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 December 2025.

Tue 31/317:20SOU - SEA
1 stop26h 15mDelta
Wed 8/417:35SEA - SOU
1 stop15h 15mDelta
Deal found 3/12£582
Sun 29/317:20SOU - SEA
1 stop26h 15mDelta
Wed 8/417:35SEA - SOU
1 stop15h 15mDelta
Deal found 3/12£583
Mon 30/317:20SOU - SEA
1 stop26h 15mDelta
Wed 8/407:20SEA - SOU
2 stops17h 15mDelta
Deal found 3/12£583
Wed 1/409:05SOU - SEA
1 stop34h 30mDelta
Wed 8/417:35SEA - SOU
1 stop15h 15mDelta
Deal found 3/12£594
Thu 2/409:05SOU - SEA
1 stop14h 45mDelta
Wed 8/417:35SEA - SOU
1 stop15h 15mDelta
Deal found 3/12£594
Tue 31/317:20SOU - SEA
1 stop26h 15mDelta
Mon 6/417:35SEA - SOU
1 stop15h 15mDelta
Deal found 3/12£607
Tue 31/317:20SOU - SEA
1 stop26h 15mDelta
Tue 7/417:35SEA - SOU
1 stop15h 15mDelta
Deal found 3/12£607
Mon 30/309:05SOU - SEA
1 stop14h 45mDelta
Sun 5/417:35SEA - SOU
1 stop15h 15mDelta
Deal found 3/12£608
Mon 30/309:05SOU - SEA
1 stop14h 45mDelta
Tue 7/417:35SEA - SOU
1 stop15h 15mDelta
Deal found 3/12£608

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 5 December 2025.

Round-trip from

£582

One-way from

£408

Popular in

July

Cheapest in

January

Average price

£640
Delta
  • Delta
  • 31/3-8/4
  • 2 total stops
  • 41h 30m 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. 12% potential increase in price (£57 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 December 2025
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 5 December 2025.
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 31/3

17:20-11:35

1 stop26h 15m

Seattle/Tacoma Intl

Wed 8/4

17:35-16:50

1 stop15h 15m

£582

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 29/3

17:20-11:35

1 stop26h 15m

Seattle/Tacoma Intl

Wed 8/4

17:35-16:50

1 stop15h 15m

£583

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 30/3

17:20-11:35

1 stop26h 15m

Seattle/Tacoma Intl

Wed 8/4

07:20-08:35

2 stops17h 15m

£583

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 1/4

09:05-11:35

1 stop34h 30m

Seattle/Tacoma Intl

Wed 8/4

17:35-16:50

1 stop15h 15m

£594

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 2/4

09:05-15:50

1 stop14h 45m

Seattle/Tacoma Intl

Wed 8/4

17:35-16:50

1 stop15h 15m

£594

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 31/3

17:20-11:35

1 stop26h 15m

Seattle/Tacoma Intl

Mon 6/4

17:35-16:50

1 stop15h 15m

£607

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 31/3

17:20-11:35

1 stop26h 15m

Seattle/Tacoma Intl

Tue 7/4

17:35-16:50

1 stop15h 15m

£607

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 30/3

09:05-15:50

1 stop14h 45m

Seattle/Tacoma Intl

Sun 5/4

17:35-16:50

1 stop15h 15m

£608

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 30/3

09:05-15:50

1 stop14h 45m

Seattle/Tacoma Intl

Tue 7/4

17:35-16:50

1 stop15h 15m

£608

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 23/3

09:30-19:20

1 stop16h 50m

£408

Flights are sorted by cheapest return flights first.

Deals found on 3/12

Showing 1-10 of 14 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 £306). Flying from Southampton to State of Washington in August is currently the most expensive (average of £462). 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 15m. 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 £306). Flying from Southampton to State of Washington in August is currently the most expensive (average of £462). 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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