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Cheap flights from Southampton to Washington from £464

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 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
16 Jul — 23 Jul1
1 adult

Cheap flight deals from Southampton to Washington

Keep the following information in mind while searching for Southampton to Washington flight deals. Data was last updated 11 July 2025.

Round-trip from

£849

One-way from

£464

Popular in

August

Cheapest in

January

Average price

£723
KLM
  • KLM
  • 23/8-30/8
  • 3 total stops
  • 53h 39m total
  • Southampton to Washington
Aer Lingus
  • Aer Lingus
  • 7/9
  • 1 total stop
  • 29h 50m total
  • Southampton to Washington
Highest demand for flights based on searches. 15% potential increase in price (£73 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Average for round-trip flights in July 2025

Find flight deals from Southampton to Washington

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 11 July 2025.

Sat 23/809:20SOU - SEA
2 stops19h 04mKLM
Sat 30/814:10SEA - SOU
1 stop34h 35mKLM
Deal found 9/7£849
Sat 23/817:35SOU - SEA
2 stops36h 32mVirgin Atlantic
Sat 30/815:15SEA - SOU
2 stops33h 30mVirgin Atlantic
Deal found 9/7£893
Sat 23/809:40SOU - SEA
1 stop16h 10mAer Lingus
Fri 29/800:46SEA - SOU
2 stops48h 24mAer Lingus
Deal found 9/7£933
Sat 23/809:40SOU - SEA
2 stops19h 00mMultiple Airlines
Sat 30/815:45SEA - SOU
3 stops33h 00mMultiple Airlines
Deal found 9/7£1,033

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 11 July 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

Sat 23/8

09:20-20:24

2 stops19h 04m

Seattle/Tacoma Intl

Sat 30/8

14:10-08:45

1 stop34h 35m

£849

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 23/8

17:35-22:07

2 stops36h 32m

Seattle/Tacoma Intl

Sat 30/8

15:15-08:45

2 stops33h 30m

£893

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 23/8

09:40-17:50

1 stop16h 10m

Seattle/Tacoma Intl

Fri 29/8

00:46-09:10

2 stops48h 24m

£933

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 23/8

09:40-20:40

2 stops19h 00m

Seattle/Tacoma Intl

Sat 30/8

15:45-08:45

3 stops33h 00m

£1,033

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 7/9

20:00-17:50

1 stop29h 50m

£464

Flights are sorted by cheapest return flights first.

Deals found on 10/7

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, January is the cheapest month in which you can book a flight from Southampton to State of Washington (average of £622). Flying from Southampton to State of Washington in July is currently the most expensive (average of £946). 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.

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated 11 July 2025.
Read through reviews of airlines operating flights from Southampton to Washington, such as KLM, Virgin Atlantic, andAer Lingus. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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.

  • 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, January is the cheapest month in which you can book a flight from Southampton to State of Washington (average of £622). Flying from Southampton to State of Washington in July is currently the most expensive (average of £946). 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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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?

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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