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Cheap flights from Southampton to Washington, D.C. from £484

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
31 Mar — 7 Apr1
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 26 March 2025.

Round-trip from

£593

One-way from

£484

Popular in

July

Cheapest in

February

Average price

£525
Aer Lingus
  • Aer Lingus
  • 9/5-16/5
  • 2 total stops
  • 28h 35m total
  • Southampton to Washington, D.C.
Aer Lingus
  • Aer Lingus
  • 11/5
  • 1 total stop
  • 24h 50m total
  • Southampton to Washington, D.C.
Highest demand for flights based on searches. 12% potential increase in price (£62 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 March 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 26 March 2025.

Fri 9/509:40SOU - IAD
1 stop14h 15mAer Lingus
Fri 16/520:25IAD - SOU
1 stop14h 20mAer Lingus
Deal found 25/3£593
Fri 9/517:35SOU - IAD
2 stops23h 10mVirgin Atlantic
Fri 16/517:40IAD - SOU
2 stops18h 10mVirgin Atlantic
Deal found 25/3£642
Tue 8/417:35SOU - IAD
1 stop27h 00mDelta
Tue 15/413:44IAD - SOU
2 stops14h 01mDelta
Deal found 25/3£793
Tue 8/409:20SOU - BWI
2 stops18h 53mDelta
Mon 14/414:35BWI - SOU
2 stops13h 15mDelta
Deal found 25/3£797
Tue 8/409:20SOU - DCA
2 stops14h 56mDelta
Wed 16/415:25DCA - SOU
2 stops12h 20mDelta
Deal found 25/3£797
Fri 9/509:40SOU - IAD
3 stops32h 34mMultiple Airlines
Fri 16/518:10IAD - SOU
2 stops18h 20mMultiple Airlines
Deal found 25/3£897

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 26 March 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

Fri 9/5

09:40-18:55

1 stop14h 15m

Washington, D.C. Dulles Intl

Fri 16/5

20:25-15:45

1 stop14h 20m

£593

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 9/5

17:35-11:45

2 stops23h 10m

Washington, D.C. Dulles Intl

Fri 16/5

17:40-16:50

2 stops18h 10m

£642

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Tue 8/4

09:20-15:35

1 stop11h 15m

Washington, D.C. Dulles Intl

Mon 14/4

17:25-08:50

1 stop10h 25m

£793

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Tue 8/4

09:20-23:13

2 stops18h 53m

Baltimore/Washington

Mon 14/4

14:35-08:50

2 stops13h 15m

£797

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Tue 8/4

09:20-19:16

2 stops14h 56m

Washington, D.C. Reagan-National

Wed 16/4

15:25-08:45

2 stops12h 20m

£797

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 9/5

09:40-13:14

3 stops32h 34m

Washington, D.C. Dulles Intl

Fri 16/5

18:10-17:30

2 stops18h 20m

£897

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 11/5

20:00-15:50

1 stop24h 50m

£484

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Tue 22/4

09:20-15:35

1 stop11h 15m

£1,212

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Tue 22/4

09:20-20:00

2 stops39h 40m

£1,217

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Tue 22/4

09:20-18:20

2 stops38h 00m

£1,217

Flights are sorted by cheapest return flights first.

Deals found on 26/3

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 26 March 2025.

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Entertainment

7.9

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

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Entertainment

7.9

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

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Entertainment

7.9

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

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Entertainment

7.9

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 £593 on this airline. Additional options worth looking into are Virgin Atlantic and Delta, starting at £642 and £793 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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How does Cheapflights help users find flights from Southampton to Washington, D.C.?

Deals for Southampton to Washington, D.C. flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights helps you find that perfect flight to Washington, D.C. from Southampton by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Southampton to Washington, D.C. with no change fees?

Yes, we can. To see specific flights from Southampton to Washington, D.C. with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Southampton to Washington, D.C. become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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