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Cheap flights from Southampton to Washington, D.C. from £535

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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — WAS
5 May — 12 May1
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 30 April 2025.

Round-trip from

£735

One-way from

£535

Popular in

July

Cheapest in

February

Average price

£529
Aer Lingus
  • Aer Lingus
  • 14/6-21/6
  • 2 total stops
  • 24h 30m total
  • Southampton to Washington, D.C.
Aer Lingus
  • Aer Lingus
  • 11/5
  • 1 total stop
  • 14h 45m total
  • Southampton to Washington, D.C.
Highest demand for flights based on searches. 11% potential increase in price (£54 potential increase over avg. return price).
Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).
Average for round-trip flights in April 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 30 April 2025.

Sat 14/609:40SOU - IAD
1 stop14h 15mAer Lingus
Sat 21/617:20IAD - SOU
1 stop10h 15mAer Lingus
Deal found 30/4£735
Sat 14/609:20SOU - IAD
1 stop11h 15mKLM
Sat 21/612:13IAD - SOU
2 stops15h 32mKLM
Deal found 30/4£744
Fri 23/517:35SOU - IAD
1 stop27h 00mDelta
Sun 25/517:25IAD - SOU
1 stop10h 20mDelta
Deal found 29/4£790
Fri 23/517:35SOU - DCA
2 stops21h 40mDelta
Sun 25/514:59DCA - SOU
2 stops12h 46mDelta
Deal found 29/4£794
Sat 14/609:40SOU - IAD
2 stops35h 35mMultiple Airlines
Sat 21/620:45IAD - SOU
3 stops31h 00mMultiple Airlines
Deal found 30/4£881

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 30 April 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

Sat 14/6

09:40-18:55

1 stop14h 15m

Washington, D.C. Dulles Intl

Sat 21/6

17:20-08:35

1 stop10h 15m

£735

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sat 14/6

09:20-15:35

1 stop11h 15m

Washington, D.C. Dulles Intl

Sat 21/6

12:13-08:45

2 stops15h 32m

£744

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 23/5

17:35-15:35

1 stop27h 00m

Washington, D.C. Dulles Intl

Mon 26/5

13:00-08:50

2 stops14h 50m

£790

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Fri 23/5

17:35-10:15

2 stops21h 40m

Washington, D.C. Reagan-National

Sun 25/5

14:59-08:45

2 stops12h 46m

£794

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sat 14/6

09:40-16:15

2 stops35h 35m

Washington, D.C. Dulles Intl

Sat 21/6

20:45-08:45

3 stops31h 00m

£881

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 11/5

09:10-18:55

1 stop14h 45m

£535

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Mon 5/5

09:20-15:35

1 stop11h 15m

£1,207

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Mon 5/5

09:20-10:15

2 stops29h 55m

£1,212

Flights are sorted by cheapest return flights first.

Deals found on 29/4

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.

Rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. when rainfall is around 66.0 mm.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C., use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

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 30 April 2025.
Get a feel of what it's like to fly with Delta, KLM and Aer Lingus from Southampton to Washington, D.C. by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
8.0
Very Good

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 £735 on this airline. Additional options worth looking into are KLM and Delta, starting at £744 and £790 round-trip.

  • 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

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

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