£508 Find Cheap Flights from Portsmouth to Washington, D.C.

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portsmouth to Washington, D.C. departing on 15/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return fare
£508
Virgin Atlantic
Sun 15/3Sun 22/3
SOU - IAD • 1 stop
Cheapest one-way flight
£921
British Airways
Wed 7/1
SOU - IAD • 2 stops
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Flight Deals
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Flight Deals

Cheap Flights from Portsmouth to Washington, D.C.

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Portsmouth to Washington, D.C. that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Portsmouth to Washington, D.C.

Sun, 15 Mar - Sun, 22 Mar
Virgin Atlantic Logo
09:30 - 17:05
SOU
-
IAD
11h 35m1 stop
Virgin Atlantic Logo
19:05 - 17:00
IAD
-
SOU
17h 55m1 stop
£508Virgin Atlantic
Wed, 28 Jan - Wed, 4 Feb
Virgin Atlantic Logo
09:25 - 00:41
SOU
-
BWI
20h 16m2 stops
Virgin Atlantic Logo
11:45 - 08:25
BWI
-
SOU
15h 40m2 stops
£555Virgin Atlantic
Wed, 28 Jan - Wed, 4 Feb
Virgin Atlantic Logo
09:25 - 20:45
SOU
-
IAD
16h 20m2 stops
Virgin Atlantic Logo
12:23 - 08:25
IAD
-
SOU
15h 02m2 stops
£555Virgin Atlantic
Wed, 28 Jan - Wed, 4 Feb
Virgin Atlantic Logo
09:25 - 22:57
SOU
-
DCA
18h 32m2 stops
Virgin Atlantic Logo
12:55 - 08:25
DCA
-
SOU
14h 30m2 stops
£555Virgin Atlantic
Wed, 28 Jan - Wed, 4 Feb
KLM Logo
17:35 - 16:05
SOU
-
IAD
27h 30m1 stop
KLM Logo
12:23 - 08:50
IAD
-
SOU
15h 27m2 stops
£575KLM
Wed, 28 Jan - Wed, 4 Feb
Multiple Airlines Logo
19:35 - 23:47
SOU
-
BWI
33h 12m3 stops
Multiple Airlines Logo
19:40 - 17:20
BWI
-
SOU
16h 40m2 stops
£671Multiple Airlines
Wed, 28 Jan - Wed, 4 Feb
Multiple Airlines Logo
19:35 - 23:47
SOU
-
BWI
33h 12m3 stops
Multiple Airlines Logo
19:40 - 18:30
BWI
-
SOU
17h 50m3 stops
£730Multiple Airlines
Wed, 28 Jan - Wed, 4 Feb
Aer Lingus Logo
12:25 - 15:35
SOU
-
IAD
32h 10m1 stop
Aer Lingus Logo
17:05 - 08:45
IAD
-
SOU
10h 40m1 stop
£786Aer Lingus
Thu, 5 Feb - Mon, 9 Feb
British Airways Logo
20:10 - 15:35
SOU
-
IAD
24h 25m1 stop
British Airways Logo
17:05 - 11:55
IAD
-
SOU
13h 50m1 stop
£843British Airways
Thu, 5 Feb - Mon, 9 Feb
British Airways Logo
16:05 - 15:35
SOU
-
IAD
28h 30m1 stop
British Airways Logo
17:05 - 11:55
IAD
-
SOU
13h 50m1 stop
£843British Airways
Useful Info

Good to know - Cheap tickets from Portsmouth to Washington, D.C.

Low seasonNovember
Best time to beat the crowds (8% less expensive on average)
Most popular time to fly (7% more expensive on average)

When to book flights from Portsmouth to Washington, D.C.

Are your dates flexible? Find out the best times to travel from Portsmouth to Washington, D.C. based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

FAQs for booking flights from Portsmouth to Washington, D.C.

  • How does KAYAK find such low prices on flights from Portsmouth to Washington, D.C.?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portsmouth to Washington, D.C..

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portsmouth to Washington, D.C.?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. from Portsmouth is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portsmouth to Washington, D.C.?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Washington, D.C. with an airline and back to Portsmouth with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portsmouth to Washington, D.C.?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington, D.C. from Portsmouth up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Portsmouth to Washington, D.C.

 
Need help choosing which airline to fly with from Portsmouth to Washington, D.C.? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
Aer LingusOverall score based on 1394 reviews
8.0Crew
6.6Food
7.1Comfort
7.0Entertainment
7.4Boarding
Airline reviews

Seats are small, but comfortable and more space around you, so for a normal person the seats are perfect. If you are a big and fat individual, I would not think the seats are comfortable. All else was good and normal. Lots of movies to watch.

10.0 ExcellentPAULINA, Nov 2025
DUB - LAS
Read more Aer Lingus reviews

Seats are small, but comfortable and more space around you, so for a normal person the seats are perfect. If you are a big and fat individual, I would not think the seats are comfortable. All else was good and normal. Lots of movies to watch.

The same as I stated prior. We incurred extra costs that should be reimbursed, given we were not communicated with about schedule changes.

I had zero issues with the flight. I did have issues with the staff at the airport. We missed out flight due to a delay with another airline. Talking to the staff and trying to get a new flight arranged was challenging. One guy was able to try to help us and got us on a new flight, but other staff was dismissive and clearly let us know it wasn’t their problem. All I kept thinking was… this is why air lingus has such a poor customer service reputation. I will be avoiding this airline in the future.

Experience was great overall. However, the connection time between my flights (1hr 15 mins) was too short. We had to get through security check and US immigration in that time, and I made it to the gate just as they were announcing it was about to close. Flights with such a short connection time should maybe not be offered for purchase, or an advance alert would be helpful. Other than that the in-flight experience was excellent, especially the food. Many thanks!

The seats needs to be comfortables, at least please add more padding to the seats.

Incredible service. Incredible entertainment. I felt like they just kept serving us something new avery hour. My wife and I both had a joyous flight.

I liked that I went thru customs in Dublin instead of having to do that in LA.

I was so grateful for the kindness of the crew. They made a long trip very pleasant. Food was delicious. Many movie options

My flight from Dublin was delayed two hours which ment that I missed my connecting flight to Phoenix. American Airlines provided a hotel room and rebooked my flight for 7:30 AM the next day. I didn't get to the room until 11 pm and I had to be at the airport the next day by 5 AM. The airlines did their best but the schedule was challenging for an 81 year old.

Dinner was fabulous. Would have enjoyed a wine with it. None offered... for sale??? Breakfast was disappointing but adequate amount of food.

Everything you need to know for your flight from Portsmouth to Washington, D.C.

Cabin class types available on flights to Portsmouth

Cabin classes available on flights to Portsmouth. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
First Class flights to Washington, D.C.from £318
Business Class flights to Washington, D.C.from £207
Prem Econ Class flights to Washington, D.C.from £319
Economy class flights to Washington, D.C.from £34