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Cheap flights from Southampton to Washington, D.C. from £348

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 24/8. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — WAS
13 Jul — 20 Jul1
1 adult

Cheap flight deals from Southampton to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Southampton (SOU) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 8 July 2025.

Round-trip from

£689

One-way from

£348

Popular in

July

Cheapest in

February

Average price

£656
19/8-26/8
  • 19/8-26/8
  • 5 total stops
  • 45h 29m total
  • Southampton to Washington, D.C.
24/8
  • 24/8
  • 3 total stops
  • 43h 14m total
  • Southampton to Washington, D.C.
Highest demand for flights based on searches. 14% potential increase in price (£65 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Average for round-trip flights in July 2025

Find flight deals from Southampton to Washington, D.C.

Cheapest flights from Southampton to Washington, D.C.
Explore the most affordable flight options available from Southampton to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 July 2025.

Tue 19/809:10SOU - IAD
2 stops15h 49mMultiple Airlines
Tue 26/822:05IAD - SOU
3 stops29h 40mMultiple Airlines
Deal found 6/7£689
Tue 19/809:10SOU - IAD
1 stop15h 20mAer Lingus
Tue 26/817:20IAD - SOU
1 stop9h 45mAer Lingus
Deal found 6/7£706
Wed 20/809:10SOU - BWI
2 stops15h 15mMultiple Airlines
Wed 27/820:30BWI - SOU
2 stops18h 00mMultiple Airlines
Deal found 6/7£750
Wed 20/820:00SOU - DCA
2 stops27h 02mMultiple Airlines
Wed 27/809:40DCA - SOU
2 stops28h 50mMultiple Airlines
Deal found 6/7£775
Wed 20/809:20SOU - IAD
1 stop11h 15mKLM
Wed 27/817:25IAD - SOU
1 stop10h 20mKLM
Deal found 6/7£779
Tue 8/709:20SOU - IAD
1 stop11h 15mVirgin Atlantic
Thu 17/717:25IAD - SOU
1 stop10h 20mVirgin Atlantic
Deal found 6/7£1,453

Cheapflights Fare Finder

Customise your flight search to find flights from Southampton to Washington, D.C. 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 8 July 2025.
Use the filters below to find and compare flights from Southampton to Washington, D.C. that are best for you.

Fly from

Southampton

Fly to

Washington, D.C.

Route

Depart

Return

Price

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Tue 19/8

09:10-19:59

2 stops15h 49m

Washington, D.C. Dulles Intl

Tue 26/8

22:05-08:45

3 stops29h 40m

£689

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Tue 19/8

09:10-19:30

1 stop15h 20m

Washington, D.C. Dulles Intl

Tue 26/8

17:20-08:05

1 stop9h 45m

£706

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Wed 20/8

09:10-19:25

2 stops15h 15m

Baltimore/Washington

Wed 27/8

20:30-19:30

2 stops18h 00m

£750

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Wed 20/8

20:00-18:02

2 stops27h 02m

Washington, D.C. Reagan-National

Wed 27/8

09:40-19:30

2 stops28h 50m

£775

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 20/8

09:20-15:35

1 stop11h 15m

Washington, D.C. Dulles Intl

Wed 27/8

17:25-08:45

1 stop10h 20m

£779

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Sun 24/8

21:30-11:44

3 stops43h 14m

£348

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 24/8

14:50-14:56

3 stops29h 06m

£446

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 24/8

20:00-18:55

1 stop27h 55m

£453

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 5/10

18:25-15:35

1 stop26h 10m

£1,215

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Sun 5/10

18:25-18:31

2 stops29h 06m

£1,219

Flights are sorted by cheapest return flights first.

Deals found on 7/7

Best time to book a flight from Southampton to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. 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, D.C.

What is the cheapest month to book a flight from Southampton to Washington, D.C.?

Currently, January is the cheapest month in which you can book a flight from Southampton to Washington, D.C. (average of £599). Flying from Southampton to Washington, D.C. in July is currently the most expensive (average of £947). 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, D.C.

Get insights into the airlines that provide service to Washington, D.C.. 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, D.C.. Reviews last updated 8 July 2025.
Read reviews from past customers who have flown with Delta, KLM, andAer Lingus from Southampton to Washington, D.C.. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very Good

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Southampton to Washington, D.C.. 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, D.C.?

    Southampton Eastleigh (SOU) is the airport you will fly out of if you book a flight from Southampton to Washington, D.C.. You should not have trouble finding flights to Washington, D.C. from Eastleigh; the airport handles an average of 0 outbound flights to Washington, D.C. per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Southampton airport to Washington, D.C.. It is only a 3.5 mi journey to Eastleigh (SOU) from Southampton’s city center.

  • What are the cheapest airlines flying from Southampton to Washington, D.C. round-trip?

    Our cheapest airline available from Southampton to Washington, D.C. is Aer Lingus. Our recent data shows that you can find tickets from as low as £706 on this airline. An additional option worth looking into is KLM, starting at £779.

  • What are the most popular routes from Southampton to Washington, D.C.?

  • Can I find deals for flights from Southampton to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Southampton to Washington, D.C. flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Southampton to Washington, D.C.?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Southampton to Washington, D.C..

  • Can I find deals for business class flights from Southampton to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Southampton to Washington, D.C. 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 Washington, D.C.?

    Currently, January is the cheapest month in which you can book a flight from Southampton to Washington, D.C. (average of £599). Flying from Southampton to Washington, D.C. in July is currently the most expensive (average of £947). 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

Travelling to a place near Southampton?

Book flights to Southampton if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Arlington
Woodbridge
College Park
Laurel
Tysons

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Why should you use Cheapflights to find cheap flight tickets from Southampton to Washington, D.C.?

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