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Cheap flights from Southampton to Washington, D.C. from £498

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 22/1. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — WAS
4 Jan — 11 Jan1
1 adult
1 adult, Economy, 0 bags

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

Enter your travel dates to find the best prices.

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 5 December 2025.

Fri 5/1220:00SOU - IAD
2 stops24h 35mBritish Airways
Mon 8/1221:00IAD - SOU
1 stop9h 55mBritish Airways
Deal found 4/12£1,173
Sun 21/1220:00SOU - IAD
2 stops24h 35mBritish Airways
Mon 29/1217:05IAD - SOU
1 stop13h 50mBritish Airways
Deal found 3/12£2,919
Sat 13/1209:30SOU - DCA
2 stops17h 30mBritish Airways
Sat 20/1210:05DCA - SOU
2 stops24h 30mBritish Airways
Deal found 2/12£7,851

Find 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 5 December 2025.

Round-trip from

£839

Popular in

July

Cheapest in

February

Average price

£629
British Airways
  • British Airways
  • 4/2-8/2
  • 4 total stops
  • 33h 00m total
  • Southampton to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£57 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 December 2025
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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 5 December 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

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Thu 22/1

09:00-23:05

2 stops19h 05m

Baltimore/Washington

Mon 26/1

07:22-08:50

2 stops20h 28m

£498

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Thu 22/1

09:00-22:57

2 stops18h 57m

Washington, D.C. Reagan-National

Sun 25/1

11:10-08:50

2 stops16h 40m

£498

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 4/2

08:40-19:55

2 stops16h 15m

Washington, D.C. Dulles Intl

Sun 8/2

18:20-16:05

2 stops16h 45m

£839

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 29/1

08:40-19:55

2 stops16h 15m

Washington, D.C. Dulles Intl

Sat 31/1

17:05-08:45

1 stop10h 40m

£2,637

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 21/12

20:00-15:35

2 stops24h 35m

Washington, D.C. Dulles Intl

Mon 29/12

17:05-11:55

1 stop13h 50m

£2,919

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Thu 22/1

15:00-22:03

2 stops36h 03m

Washington, D.C. Reagan-National

Sun 25/1

10:12-08:45

2 stops17h 33m

£3,113

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Wed 24/12

13:50-18:45

2 stops33h 55m

£1,002

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Tue 23/12

19:55-18:45

2 stops27h 50m

£1,002

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Mon 22/12

18:05-16:51

2 stops27h 46m

£1,288

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Wed 24/12

08:40-09:13

2 stops29h 33m

£1,302

Flights are sorted by cheapest return flights first.

Deals found on 5/12

Showing 1-10 of 14 results
1
2

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, February is the cheapest month in which you can book a flight from Southampton to Washington, D.C. (average of £229). Flying from Southampton to Washington, D.C. in July is currently the most expensive (average of £480). 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.

What’s the top stopover airport for flights from Southampton to Washington, D.C.?

Share of one-stop return flights from Southampton to Washington, D.C. chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Dublin (DUB) – chosen by Cheapflights users on 86% of one-stop itineraries from Southampton to Washington, D.C. on Cheapflights.

What’s the cheapest stopover airport for flights from Southampton to Washington, D.C.?

Average return fare for one-stop flights from Southampton to Washington, D.C., chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Dublin (DUB) is the most affordable one-stop option, with an average return flight price of £606.

What’s the fastest stopover option from Southampton to Washington, D.C.?

Shortest average travel time for one-stop one-way flights from Southampton to Washington, D.C., based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 11h 10m.

Which airport typically offers the quickest stopover for flights from Southampton to Washington, D.C.?

Average stopover duration for one-stop one-way flights from Southampton to Washington, D.C., chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 28m.

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 5 December 2025.
Read reviews from past customers who have flown with Aer 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.
Aer Lingus
7.2
Good
1,385 reviews
Check prices

Boarding

7.4

Food

6.6

Entertainment

6.9

Crew

8.0

Comfort

7.1

Overall

7.2

Reviews

1 / 20
6.0
Good

David,Oct 2025

DUB - IAD

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight from Dublin to Washington (Flight EI 119 on October 25, 2025) one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. Beyond being firm and actually nasty and rude. A little interpersonal communication training could help this man.
Aer Lingus
7.2
Good
1,385 reviews
Aer Lingus
7.2
Good
1,385 reviews
Check prices

Boarding

7.4

Food

6.6

Entertainment

6.9

Crew

8.0

Comfort

7.1

Overall

7.2

Reviews

1 / 20
6.0
Good

David,Oct 2025

DUB - IAD

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight from Dublin to Washington (Flight EI 119 on October 25, 2025) one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. Beyond being firm and actually nasty and rude. A little interpersonal communication training could help this man.

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.

  • How long is the flight from Southampton to Washington, D.C.?

    For as low as £839, Delta can have you in Washington, D.C. from Southampton in 16h 15m. The distance from Southampton to Washington, D.C. is about 3639 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    The most popular route from Southampton to Washington, D.C. is Southampton Eastleigh - Washington, D.C. Dulles Intl. You may also consider Southampton Eastleigh - Washington, D.C. Reagan-National or Southampton Eastleigh - Baltimore/Washington.

  • 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, February is the cheapest month in which you can book a flight from Southampton to Washington, D.C. (average of £229). Flying from Southampton to Washington, D.C. in July is currently the most expensive (average of £480). 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 Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Woodbridge
Arlington
Alexandria
College Park

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Alternative routes for Southampton to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
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Fly with Cheapflights

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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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