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Cheap flights from Southampton to Washington from £375

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 30/5. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
17 Jan — 24 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 18 December 2025.

Wed 4/312:25SOU - SEA
1 stop13h 55mBritish Airways
Sun 8/321:05SEA - SOU
1 stop15h 35mBritish Airways
Deal found 16/12£527
Sat 31/109:25SOU - SEA
2 stops21h 00mVirgin Atlantic
Sat 7/221:59SEA - SOU
2 stops35h 06mVirgin Atlantic
Deal found 17/12£557
Sat 31/109:25SOU - SEA
2 stops21h 00mKLM
Sat 7/215:05SEA - SOU
1 stop18h 10mKLM
Deal found 17/12£582
Sat 31/109:25SOU - SEA
2 stops20h 24mDelta
Sat 7/215:05SEA - SOU
1 stop18h 10mDelta
Deal found 17/12£582
Fri 30/117:35SOU - SEA
1 stop26h 15mDelta
Fri 6/207:10SEA - SOU
2 stops17h 35mDelta
Deal found 15/12£584
Wed 14/109:25SOU - SEA
2 stops20h 24mKLM
Wed 21/107:10SEA - SOU
2 stops17h 15mKLM
Deal found 17/12£596
Wed 14/117:35SOU - SEA
1 stop26h 15mDelta
Wed 21/109:05SEA - SOU
2 stops24h 00mDelta
Deal found 17/12£592
Sat 30/509:15SOU - SEA
2 stops21h 01mDelta
Mon 1/611:15SEA - SOU
2 stops21h 35mDelta
Deal found 15/12£635

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 18 December 2025.

Round-trip from

£527

One-way from

£375

Popular in

July

Cheapest in

January

Average price

£638
British Airways
  • British Airways
  • 4/3-8/3
  • 2 total stops
  • 29h 30m total
  • Southampton to Washington
Search Deals
30/5
  • 30/5
  • 3 total stops
  • 44h 38m total
  • Southampton to Washington
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£61 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 18 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

Wed 4/3

12:25-18:20

1 stop13h 55m

Seattle/Tacoma Intl

Sun 8/3

21:05-19:40

1 stop15h 35m

£527

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 31/1

09:25-22:25

2 stops21h 00m

Seattle/Tacoma Intl

Sat 7/2

21:59-17:05

2 stops35h 06m

£557

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 31/1

09:25-22:25

2 stops21h 00m

Seattle/Tacoma Intl

Sat 7/2

15:05-17:15

1 stop18h 10m

£582

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 31/1

09:25-21:49

2 stops20h 24m

Seattle/Tacoma Intl

Sat 7/2

15:05-17:15

1 stop18h 10m

£582

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 30/1

17:35-11:50

1 stop26h 15m

Seattle/Tacoma Intl

Fri 6/2

07:10-08:45

2 stops17h 35m

£584

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 14/1

17:35-11:50

1 stop26h 15m

Seattle/Tacoma Intl

Wed 21/1

09:05-17:05

2 stops24h 00m

£592

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 14/1

09:25-21:49

2 stops20h 24m

Seattle/Tacoma Intl

Wed 21/1

07:10-08:25

2 stops17h 15m

£596

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 30/5

09:15-22:16

2 stops21h 01m

Seattle/Tacoma Intl

Mon 1/6

11:15-16:50

2 stops21h 35m

£635

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 30/5

07:50-20:28

3 stops44h 38m

£375

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 23/3

09:30-19:20

1 stop16h 50m

£387

Flights are sorted by cheapest return flights first.

Deals found on 15/12

Showing 1-10 of 13 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 £305). 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 13h 55m. The distance from Southampton to State of Washington is about 4787 mi. This flight may include one or multiple stops.

  • 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 £305). 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?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Washington from Southampton today with Cheapflights!

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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