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.. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

£817 CHEAP FLIGHTS from Portsmouth to Washington, D.C.

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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.

Round-trip

One-way

Last minute

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

Mon, 28 Jul - Mon, 4 Aug

09:20 - 15:35SOU-IAD

11h 15m1 stop

06:00 - 08:50IAD-SOU

21h 50m2 stops

£817Virgin Atlantic

Find Deal

Mon, 28 Jul - Mon, 4 Aug

09:20 - 22:16SOU-IAD

17h 56m2 stops

13:00 - 08:50IAD-SOU

14h 50m2 stops

£821Delta

Find Deal

Mon, 28 Jul - Mon, 4 Aug

09:20 - 23:35SOU-DCA

19h 15m2 stops

19:35 - 17:50DCA-SOU

17h 15m2 stops

£821Delta

Find Deal

Wed, 20 Aug - Sun, 24 Aug

18:25 - 15:35SOU-IAD

26h 10m1 stop

20:23 - 17:00IAD-SOU

15h 37m2 stops

£823Delta

Find Deal

Sun, 27 Jul - Sun, 3 Aug

09:10 - 09:37SOU-IAD

53h 27m2 stops

22:15 - 19:30IAD-SOU

16h 15m1 stop

£826

Find Deal

Wed, 20 Aug - Sun, 24 Aug

18:25 - 16:30SOU-IAD

27h 05m2 stops

20:23 - 17:00IAD-SOU

15h 37m2 stops

£826Delta

Find Deal

Sun, 27 Jul - Sun, 3 Aug

17:35 - 15:35SOU-IAD

27h 00m1 stop

17:25 - 08:45IAD-SOU

10h 20m1 stop

£846KLM

Find Deal

Mon, 28 Jul - Mon, 4 Aug

20:00 - 17:40SOU-BWI

26h 40m2 stops

18:50 - 19:30BWI-SOU

19h 40m3 stops

£893

Find Deal

Sun, 27 Jul - Sun, 3 Aug

09:20 - 19:15SOU-IAD

14h 55m2 stops

12:45 - 08:45IAD-SOU

15h 00m2 stops

£903KLM

Find Deal

Sun, 27 Jul - Sun, 3 Aug

09:10 - 19:35SOU-BWI

15h 25m2 stops

21:20 - 08:40BWI-SOU

30h 20m2 stops

£1,096Aer Lingus

Find Deal

Useful Info

Low season	February
High season	July

Best time to beat the crowds (14% less expensive on average)

Most popular time to fly (9% 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

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.

7.1

Aer LingusOverall score based on 1117 reviews

7.2Boarding

7.0Comfort

6.4Food

6.8Entertainment

7.9Crew

Airline reviews

I would definitely use a Linus again, the price was right, the service is excellent. No delays. Wish I had a direct flight from my hometown Detroit.

10.0 ExcellentAnonymous, Jun 2025MAN - MCO

Read more Aer Lingus reviews

I would definitely use a Linus again, the price was right, the service is excellent. No delays. Wish I had a direct flight from my hometown Detroit.

At check-in the unmanned machines said QR code was invalid so had to queue for over an hour to check in bags

There was no room in the seats, smallest room we've ever had and the food was awful.

i used to fly aer Lingus regularly but due to price - poor seating etc i have been using other carriers - i now have aer lingus in my state and the price is always the highest - i have flown to Ireland 11 times in last 24 months and have not used Hartford because of price

Nicest staff I’ve experienced on a plane! Good food, great entertainment, and they gave out little blankets that my kids loved. All in all, great experience.

Seats weren't very comfortable for a long haul flight but the service made up for it.

This flight was of exactly the same high standard as the outbound leg, exactly a week earlier - except that we didn't have any food or drink because it departed at around midnight.

The Glasgow to Dublin route was very efficiently boarded, flight and landing and disembarkation were all super smooth. Dublin to JFK flight I was very pleasantly surprised overall. This was my first time on Aer Lingus and having already come off the short regional flight I was curious to know how the international flight would go. Aircraft was solid, entertainment options were better than expected, flight crew were experienced and operated like clockwork. Main entree left a little something to be desired but the snack was very tasty. Boarding and disembarkation again very smooth and pilots got us in earlier than expected. Would definitely fly again

Unfortunately the flight was delayed for 50 min. Just as we were about to board so that was a drag. The boarding was average. The bag check in process was new to us and efficient. And the flight itself was smooth- basically no turbulence.

Food was very bad. Boarding was disorganized and messy. Crew was friendly

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

Cabin class

Complete your trip

Direct flights

Flights to other cities

Origins

Other airports

Cabin class types available on flights to Portsmouth

First Class flights to Washington, D.C.from £313

Business Class flights to Washington, D.C.from £332

Prem Econ Class flights to Washington, D.C.from £495

Economy class flights to Washington, D.C.from £34

Not what you’re looking for? Find thousands of other hotels, flights, car hires and package deals with KAYAK.

£817 Find Cheap Flights from Portsmouth to Washington, D.C.

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C.

Cheap Flights from Portsmouth to Washington, D.C.

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

Recent one-way flight deals from Portsmouth to Washington, D.C.

Recent last minute flight deals from Portsmouth to Washington, D.C.

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

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

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.

Top airline flying from Portsmouth to Washington, D.C.

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

Cabin class types available on flights to Portsmouth

Complete your trip to Washington, D.C. with a hotel stay or car hire

Find direct flights for Washington, D.C.

Flights to other popular destinations

Flights from domestic origins to Portsmouth

Choose which airport to fly into in Portsmouth