Find flights
When to book
FAQs

Cheap flights from Southampton to Washington from £425

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
22 Feb — 1 Mar1
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 23 January 2026.

Thu 19/217:35
SOU
-
SEA
1 stop26h 05m
Delta
Thu 26/215:05
SEA
-
SOU
1 stop17h 55m
Delta
Deal found 22/1£541
Mon 13/709:10
SOU
-
SEA
1 stop16h 00m
British Airways
Thu 6/813:35
SEA
-
SOU
2 stops18h 40m
British Airways
Deal found 22/1£600
Mon 13/709:10
SOU
-
SEA
1 stop16h 00m
British Airways
Wed 5/813:35
SEA
-
SOU
2 stops18h 40m
British Airways
Deal found 22/1£627
Sat 11/709:10
SOU
-
SEA
1 stop16h 00m
British Airways
Thu 6/813:35
SEA
-
SOU
2 stops18h 40m
British Airways
Deal found 22/1£630
Sat 11/709:10
SOU
-
SEA
1 stop16h 00m
British Airways
Wed 5/813:35
SEA
-
SOU
2 stops18h 40m
British Airways
Deal found 22/1£657
Fri 6/309:30
SOU
-
SEA
1 stop16h 50m
British Airways
Fri 13/321:05
SEA
-
SOU
1 stop28h 40m
British Airways
Deal found 20/1£663
Sun 12/720:45
SOU
-
SEA
2 stops22h 50m
British Airways
Wed 5/813:35
SEA
-
SOU
2 stops17h 10m
British Airways
Deal found 22/1£692
Sun 12/720:45
SOU
-
SEA
2 stops22h 50m
British Airways
Thu 6/813:35
SEA
-
SOU
2 stops18h 40m
British Airways
Deal found 22/1£703
Sun 7/620:45
SOU
-
SEA
2 stops22h 50m
British Airways
Wed 17/613:35
SEA
-
SOU
2 stops20h 05m
British Airways
Deal found 21/1£737
Fri 6/317:35
SOU
-
SEA
2 stops29h 09m
KLM
Fri 13/316:00
SEA
-
SOU
1 stop33h 50m
KLM
Deal found 20/1£753
Mon 13/709:10
SOU
-
SEA
1 stop16h 00m
British Airways
Tue 11/813:35
SEA
-
SOU
2 stops18h 40m
British Airways
Deal found 22/1£757

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 23 January 2026.

Round-trip from

£541

One-way from

£425

Popular in

July

Cheapest in

February

Average price

£479
Delta
  • Delta
  • 19/2-26/2
  • 3 total stops
  • 44h 15m 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 (£59 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 January 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 23 January 2026.
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

Thu 19/2

17:35-11:40

1 stop26h 05m

Seattle/Tacoma Intl

Thu 26/2

15:05-17:00

1 stop17h 55m

£541

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 13/7

09:10-17:10

1 stop16h 00m

Seattle/Tacoma Intl

Thu 6/8

13:35-16:15

2 stops18h 40m

£600

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 11/7

09:10-17:10

1 stop16h 00m

Seattle/Tacoma Intl

Wed 5/8

13:35-16:15

2 stops18h 40m

£657

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 6/3

09:30-18:20

1 stop16h 50m

Seattle/Tacoma Intl

Fri 13/3

21:05-08:45

1 stop28h 40m

£663

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 12/7

20:45-11:35

2 stops22h 50m

Seattle/Tacoma Intl

Wed 5/8

13:35-14:45

2 stops17h 10m

£692

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 6/3

17:35-14:44

2 stops29h 09m

Seattle/Tacoma Intl

Fri 13/3

16:00-08:50

1 stop33h 50m

£753

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 13/7

09:10-17:10

1 stop16h 00m

Seattle/Tacoma Intl

Tue 11/8

13:35-16:15

2 stops18h 40m

£757

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 13/7

09:10-17:10

1 stop16h 00m

Seattle/Tacoma Intl

Wed 12/8

13:35-16:15

2 stops18h 40m

£758

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 12/7

15:10-17:10

2 stops34h 00m

Seattle/Tacoma Intl

Thu 6/8

18:55-19:30

1 stop16h 35m

£772

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 14/7

09:10-17:10

1 stop16h 00m

Seattle/Tacoma Intl

Wed 5/8

13:35-14:45

2 stops17h 10m

£785

Flights are sorted by cheapest return flights first.

Deals found on 20/1

Showing 1-10 of 17 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 £303). Flying from Southampton to State of Washington in August is currently the most expensive (average of £459). 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 16h. 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 £303). Flying from Southampton to State of Washington in August is currently the most expensive (average of £459). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Southampton to Washington

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Newark flights
Heathrow to John F Kennedy Intl flights
Heathrow to LaGuardia flights
Gatwick to Newark flights
London City to John F Kennedy Intl flights
Gatwick to John F Kennedy Intl flights
Heathrow to Miami flights
Stansted to John F Kennedy Intl flights
Gatwick to LaGuardia flights
Heathrow to Los Angeles flights
Heathrow to Orlando flights
Heathrow to Las Vegas flights
London City to Newark flights
Luton to John F Kennedy Intl flights
Manchester to John F Kennedy Intl flights
Luton to Newark flights
Stansted to Newark flights
Heathrow to Boston flights
Manchester to Orlando flights
Heathrow to San Francisco flights
Heathrow to Dallas/Fort Worth flights
Heathrow to O'Hare Intl flights
Gatwick to Orlando flights
Heathrow to Seattle flights
Gatwick to Miami flights
Heathrow to Dulles Intl flights
Heathrow to Hobby flights
London City to Miami flights
Gatwick to Los Angeles flights
Stansted to Miami flights
Heathrow to Baltimore flights
Heathrow to Atlanta flights
Heathrow to George Bush Intcntl flights
Gatwick to Las Vegas flights
Gatwick to Boston flights
Heathrow to Tampa flights
London City to Los Angeles flights
Manchester to Newark flights
Edinburgh to John F Kennedy Intl flights
Manchester to LaGuardia flights
Edinburgh to Newark flights
London City to Orlando flights
London City to Las Vegas flights
Stansted to Los Angeles flights
Luton to Miami flights
Stansted to Las Vegas flights
Stansted to Orlando flights
Heathrow to Denver flights
Heathrow to Ontario flights
Manchester to Las Vegas flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.