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Cheap flights from Southampton to Washington from £462

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 14/9. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
11 Aug — 18 Aug1
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 12 July 2026.

Sat 22/809:20
SOU
-
SEA
1 stop15h 50m
Aer Lingus
Thu 27/819:10
SEA
-
SOU
1 stop13h 40m
Aer Lingus
Deal found 8/7£694
Mon 31/817:20
SOU
-
SEA
1 stop26h 27m
Delta
Fri 11/910:45
SEA
-
SOU
2 stops14h 00m
Delta
Deal found 8/7£704
Thu 3/909:05
SOU
-
SEA
2 stops19h 45m
Delta
Thu 10/921:29
SEA
-
SOU
2 stops27h 16m
Delta
Deal found 8/7£708
Sat 22/809:15
SOU
-
SEA
2 stops19h 15m
Multiple Airlines
Thu 27/809:35
SEA
-
SOU
2 stops15h 10m
Multiple Airlines
Deal found 8/7£752
Sun 6/909:15
SOU
-
SEA
1 stop15h 20m
Delta
Sat 12/917:45
SEA
-
SOU
1 stop30h 50m
Delta
Deal found 8/7£842

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 12 July 2026.

Round-trip from

£694

One-way from

£462

Popular in

December

Cheapest in

February

Average price

£628
Aer Lingus
  • Aer Lingus
  • 22/8-27/8
  • 2 total stops
  • 29h 30m total
  • Southampton to Washington
Search Deals
British Airways
  • British Airways
  • 14/9
  • 1 total stop
  • 31h 50m 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 July 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 12 July 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

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 3/9

17:20-11:47

1 stop26h 27m

Seattle/Tacoma Intl

Tue 8/9

23:59-16:50

2 stops32h 51m

£704

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 1/9

17:20-11:47

1 stop26h 27m

Seattle/Tacoma Intl

Thu 10/9

07:15-08:35

2 stops17h 20m

£704

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 2/9

09:15-16:35

1 stop15h 20m

Seattle/Tacoma Intl

Tue 8/9

23:59-16:50

2 stops32h 51m

£704

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 31/8

17:20-11:47

1 stop26h 27m

Seattle/Tacoma Intl

Thu 10/9

17:45-08:45

1 stop31h 00m

£704

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 2/9

17:20-16:35

1 stop31h 15m

Seattle/Tacoma Intl

Thu 10/9

07:15-08:35

2 stops17h 20m

£704
Fastest return journey

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 3/9

09:05-16:35

1 stop15h 30m

Seattle/Tacoma Intl

Fri 11/9

07:30-08:45

2 stops17h 15m

£704
Cheapest one-way

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 28/12

06:50-18:20

2 stops19h 30m

£509

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 29/12

18:20-18:20

2 stops32h 00m

£509

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 14/9

19:55-11:35

2 stops23h 40m

£608
Fastest single journey

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 1/1

09:20-18:20

1 stop17h 00m

£799

Flights are sorted by cheapest return flights first.

Deals found on 7/7

Showing 1-10 of 12 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 26h 27m. 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?

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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