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Cheap flights from Southampton to Washington from £512

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 28/12. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
19 Aug — 26 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 20 July 2026.

Tue 1/917:20
SOU
-
SEA
1 stop26h 27m
Delta
Mon 14/923:59
SEA
-
SOU
2 stops24h 46m
Delta
Deal found 15/7£701
Sat 5/909:15
SOU
-
SEA
2 stops20h 45m
Delta
Sun 13/913:50
SEA
-
SOU
1 stop19h 00m
Delta
Deal found 15/7£705
Sat 22/809:20
SOU
-
SEA
1 stop15h 50m
Aer Lingus
Thu 27/819:10
SEA
-
SOU
1 stop13h 40m
Aer Lingus
Deal found 15/7£728
Sun 13/1209:30
SOU
-
SEA
2 stops39h 23m
Delta
Tue 5/123:05
SEA
-
SOU
2 stops25h 05m
Delta
Deal found 20/7£769
Sat 22/809:15
SOU
-
SEA
2 stops19h 15m
Delta
Thu 27/807:15
SEA
-
SOU
2 stops17h 30m
Delta
Deal found 15/7£774
Tue 11/809:15
SOU
-
SEA
1 stop15h 12m
Delta
Sat 5/917:45
SEA
-
SOU
1 stop30h 50m
Delta
Deal found 19/7£789
Sat 15/809:15
SOU
-
SEA
2 stops20h 45m
Delta
Thu 3/917:35
SEA
-
SOU
2 stops31h 10m
Delta
Deal found 18/7£793
Sat 22/809:20
SOU
-
SEA
2 stops19h 14m
Multiple Airlines
Thu 27/819:10
SEA
-
SOU
1 stop13h 40m
Multiple Airlines
Deal found 15/7£809
Tue 15/1217:30
SOU
-
SEA
1 stop26h 20m
Delta
Tue 5/123:05
SEA
-
SOU
2 stops25h 05m
Delta
Deal found 20/7£811
Tue 11/809:15
SOU
-
SEA
1 stop15h 12m
Delta
Thu 3/923:59
SEA
-
SOU
2 stops24h 46m
Delta
Deal found 18/7£830
Sun 9/817:30
SOU
-
SEA
2 stops31h 24m
Delta
Thu 3/913:50
SEA
-
SOU
1 stop34h 55m
Delta
Deal found 19/7£834
Sun 16/817:20
SOU
-
SEA
1 stop31h 50m
British Airways
Sat 5/919:10
SEA
-
SOU
1 stop29h 30m
British Airways
Deal found 18/7£835

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 20 July 2026.

Round-trip from

£701

One-way from

£512

Popular in

December

Cheapest in

February

Average price

£627
Delta
  • Delta
  • 1/9-13/9
  • 2 total stops
  • 34h 30m total
  • Southampton to Washington
Search Deals
British Airways
  • British Airways
  • 28/12
  • 2 total stops
  • 36h 35m 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 20 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

Mon 7/9

17:20-11:47

1 stop26h 27m

Seattle/Tacoma Intl

Mon 14/9

23:59-16:50

2 stops32h 51m

£701

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 7/9

17:20-11:47

1 stop26h 27m

Seattle/Tacoma Intl

Sun 13/9

13:50-16:50

1 stop19h 00m

£701

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 3/9

17:20-11:47

1 stop26h 27m

Seattle/Tacoma Intl

Fri 18/9

06:00-08:45

2 stops18h 45m

£701
Fastest return journey

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 5/9

09:15-16:35

1 stop15h 20m

Seattle/Tacoma Intl

Tue 15/9

17:45-16:50

1 stop15h 05m

£701

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 6/9

17:20-11:47

1 stop26h 27m

Seattle/Tacoma Intl

Fri 18/9

06:00-08:45

2 stops18h 45m

£701

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 22/8

09:15-20:30

2 stops19h 15m

Seattle/Tacoma Intl

Thu 27/8

07:15-08:45

2 stops17h 30m

£774

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 8/8

09:15-11:37

1 stop34h 22m

Seattle/Tacoma Intl

Sat 5/9

17:45-08:35

1 stop30h 50m

£789

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 19/12

17:30-11:50

1 stop26h 20m

Seattle/Tacoma Intl

Tue 5/1

23:05-17:00

2 stops33h 55m

£789

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 12/8

09:15-16:27

1 stop15h 12m

Seattle/Tacoma Intl

Sat 5/9

18:05-08:35

2 stops30h 30m

£793

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 17/8

18:05-16:37

2 stops30h 32m

Seattle/Tacoma Intl

Fri 4/9

07:15-08:45

2 stops17h 30m

£793

Flights are sorted by cheapest return flights first.

Deals found on 16/7

Showing 1-10 of 18 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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Alternative routes for Southampton to Washington

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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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