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Cheap flights from Southampton to Washington from £482

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 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
31 Aug — 7 Sep1
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 1 August 2026.

Thu 10/909:20
SOU
-
SEA
1 stop15h 50m
Aer Lingus
Thu 17/919:10
SEA
-
SOU
1 stop16h 20m
Aer Lingus
Deal found 27/7£557
Tue 1/909:15
SOU
-
SEA
1 stop15h 55m
Aer Lingus
Tue 8/919:10
SEA
-
SOU
1 stop16h 20m
Aer Lingus
Deal found 27/7£563
Thu 3/909:05
SOU
-
SEA
1 stop15h 30m
Delta
Sun 13/906:00
SEA
-
SOU
2 stops18h 35m
Delta
Deal found 29/7£654
Thu 3/909:05
SOU
-
SEA
1 stop34h 42m
KLM
Thu 10/917:45
SEA
-
SOU
1 stop31h 00m
KLM
Deal found 31/7£669
Wed 23/1215:15
SOU
-
SEA
2 stops28h 10m
British Airways
Mon 28/1218:45
SEA
-
SOU
2 stops29h 40m
British Airways
Deal found 29/7£793
Thu 3/911:40
SOU
-
SEA
2 stops32h 05m
Multiple Airlines
Sun 13/919:00
SEA
-
SOU
3 stops29h 40m
Multiple Airlines
Deal found 29/7£826

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 1 August 2026.

Round-trip from

£557

One-way from

£482

Popular in

December

Cheapest in

February

Average price

£594
Aer Lingus
  • Aer Lingus
  • 10/9-17/9
  • 2 total stops
  • 32h 10m total
  • Southampton to Washington
Search Deals
British Airways
  • British Airways
  • 30/9
  • 1 total stop
  • 29h 10m total
  • Southampton to Washington
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 1 August 2026.
Use the filters below to find and compare flights from Southampton to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 10/9

09:20-17:10

1 stop15h 50m

Seattle/Tacoma Intl

Thu 17/9

19:10-19:30

1 stop16h 20m

£557

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 1/9

09:15-17:10

1 stop15h 55m

Seattle/Tacoma Intl

Tue 8/9

23:44-16:50

2 stops33h 06m

£641

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 3/9

09:05-16:35

1 stop15h 30m

Seattle/Tacoma Intl

Sun 13/9

06:00-08:35

2 stops18h 35m

£654

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 3/9

17:20-16:35

1 stop31h 15m

Seattle/Tacoma Intl

Sun 13/9

17:45-08:35

1 stop30h 50m

£654

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 3/9

17:20-16:37

2 stops31h 17m

Seattle/Tacoma Intl

Thu 10/9

17:45-08:45

1 stop31h 00m

£674

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 3/9

11:40-11:45

2 stops32h 05m

Seattle/Tacoma Intl

Sun 13/9

19:00-08:40

3 stops29h 40m

£826

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 31/10

08:55-17:50

2 stops15h 55m

Seattle/Tacoma Intl

Wed 4/11

18:45-09:45

2 stops31h 00m

£831
Cheapest one-way

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 26/10

19:55-17:50

2 stops28h 55m

£498

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 30/9

18:25-11:35

2 stops25h 10m

£516
Fastest single journey

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 16/8

09:20-17:10

1 stop15h 50m

£1,365

Flights are sorted by cheapest return flights first.

Deals found on 27/7

Showing 1-10 of 11 resultsSorted by cheapest first
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

No data available for this route at this time. Please check back soon.

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 15h 50m. 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.

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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