$89 Find Cheap Flights from Washington, D.C. to Portsmouth - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Portsmouth departing on 7/18. 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 round-trip
$167
Typical prices: $224-$380
Delta
Tue 11/24Tue 12/8
BWI - BOS • Non-stop
Cheapest non-stop
$167
Typical prices: $161-$306
Southwest
Tue 8/4Sat 8/8
BWI - BOS • Non-stop
Arrival airport
You can't fly directly to Portsmouth. It is served by Boston (BOS), located 50.3 miles from Portsmouth.
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Flight Deals
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Flight Deals

Cheap Flights from Washington, D.C. to Portsmouth (WAS-BOS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Portsmouth 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 round-trip flight deals from Washington, D.C. to Portsmouth

Tue, Nov 24 - Tue, Dec 8
Delta Logo
9:00 am - 10:37 am
BWI
-
BOS
1h 37mnonstop
Delta Logo
6:25 am - 8:14 am
BOS
-
BWI
1h 49mnonstop
$167Delta
Tue, Aug 18 - Wed, Aug 19
Delta Logo
6:27 pm - 8:12 pm
BWI
-
BOS
1h 45mnonstop
Delta Logo
6:35 am - 8:20 am
BOS
-
BWI
1h 45mnonstop
$169Delta
Sat, Aug 29 - Sun, Aug 30
Southwest Logo
4:00 pm - 5:30 pm
BWI
-
BOS
1h 30mnonstop
Southwest Logo
5:55 am - 7:25 am
BOS
-
BWI
1h 30mnonstop
$176Southwest
Thu, Jul 23 - Wed, Jul 29
American Airlines Logo
6:00 am - 7:39 am
DCA
-
BOS
1h 39mnonstop
American Airlines Logo
7:27 pm - 9:15 pm
BOS
-
DCA
1h 48mnonstop
$177American Airlines
Sat, Jul 18 - Mon, Jul 20
United Airlines Logo
5:25 pm - 7:14 pm
IAD
-
BOS
1h 49mnonstop
United Airlines Logo
5:45 am - 7:23 am
BOS
-
IAD
1h 38mnonstop
$177United Airlines
Fri, Jul 10 - Wed, Jul 29
JetBlue Logo
7:59 pm - 9:38 pm
DCA
-
BOS
1h 39mnonstop
JetBlue Logo
10:20 am - 12:01 pm
BOS
-
DCA
1h 41mnonstop
$179JetBlue
Thu, Aug 6 - Mon, Aug 10
Southwest Logo
6:05 pm - 7:40 pm
BWI
-
BOS
1h 35mnonstop
Southwest Logo
6:45 pm - 8:25 pm
BOS
-
BWI
1h 40mnonstop
$179Southwest
Sat, Sep 26 - Sun, Sep 27
United Airlines Logo
10:15 pm - 11:59 pm
IAD
-
BOS
1h 44mnonstop
United Airlines Logo
5:45 am - 7:20 am
BOS
-
IAD
1h 35mnonstop
$180United Airlines
Tue, Sep 22 - Sat, Sep 26
JetBlue Logo
1:20 pm - 3:15 pm
DCA
-
BOS
1h 55mnonstop
JetBlue Logo
6:55 pm - 9:00 pm
BOS
-
DCA
2h 05mnonstop
$182JetBlue
Wed, Sep 30 - Sun, Oct 4
American Airlines Logo
6:56 am - 8:45 am
DCA
-
BOS
1h 49mnonstop
American Airlines Logo
8:08 am - 10:00 am
BOS
-
DCA
1h 52mnonstop
$188American Airlines
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$89
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 6% increase in price.
Flight from Baltimore to Boston

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

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

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

  • Which airports will I be using when flying from Washington, D.C. to Portsmouth?

    When flying out of Washington, D.C. you’ll be using one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. Portsmouth does not have its own airport so you’ll be flying into nearby Boston Logan Intl airport, which is 50.3 mi away.

  • How long does a flight from Washington, D.C. to Portsmouth take?

    Direct flights cover the 396 miles separating Washington, D.C. and Portsmouth in about 1h 29m.

  • How many flights are there between Washington, D.C. and Portsmouth?

    87 direct flights run between Washington, D.C. and Portsmouth on a daily basis. On average, there are about 611 departures each week.

  • What’s the cheapest day of the week to fly between Washington, D.C. and Portsmouth?

    Consider leaving on a Friday and avoid Saturdays if you are looking for the best rates. For your return to Washington, D.C., you’ll find the best rates on Fridays and the most expensive ones on Saturdays.

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

    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 Washington, D.C. to Portsmouth.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portsmouth from Washington, D.C. 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 Washington, D.C. to Portsmouth?

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

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

    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 Portsmouth from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from Washington, D.C. to Portsmouth?

    In the last 5 days, the cheapest one-way ticket between Washington, D.C. and Portsmouth found on KAYAK was with JetBlue for $74. Frontier offered a round-trip connection from $86 and Delta from $110.

Top tips for finding cheap flights from Washington, D.C. to Portsmouth

  • There is no airport in Portsmouth. Instead, you’ll be flying into Boston Logan Airport when flying between Washington, D.C. and Portsmouth.
  • The cheapest flight from Washington, D.C. to Portsmouth was found 77 days before departure, on average.
  • Book at least 2 weeks before departure in order to get a below-average price.
  • High season is considered to be May, June and July. The cheapest month to fly is December.

Reviews of the top 5 airlines serving Washington, D.C. to Portsmouth

 
Need help choosing which airline to fly with from Washington, D.C. to Portsmouth? 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.
7.9
SouthwestOverall score based on 4246 reviews
8.1Boarding
7.5Entertainment
8.0Comfort
8.6Crew
7.0Food
Airline reviews

The flight was late. The crew was rude. There was no food. Cramped and uncomfortable. Nothing about this flight was good.

2.0 MediocreIrene, Jun 2026
DEN - SFO
Read more Southwest reviews

The flight was late. The crew was rude. There was no food. Cramped and uncomfortable. Nothing about this flight was good.

Crew was rude, flight was late, wifi didn't work, no food, basically nothing about this flight was good.

It was just okay, no frills, basic transportation with no luxury. No screens on the seats, no water or drinks on a short flight. Full flight but at least it was on time.

The crew canceled the complementary snack and drink in anticipation of turbulence that never materialized. I was counting on the drink (water) to take the the doses of medication - prescribed for my heart condition - that were due during the flight. Since no snack or meal was served on this flight, I cannot rate the food quality. Otherwise, this flight was excellent.

Haven’t flown on SW in years. Flight was on time departing and arriving. Served vegan butter onion flavored pretzels which were bad. Coke served was in a tiny paper cup. Crew was not engaging. Felt like they were going through the motions. Old plane, tight seats and no leg room.

No delays and arrived to destination 30 min early. Staff was super friendly.

Pretty standard flight. We left late, but arrived early. The wifi entertainment is always nice. The free snacks and beverages are simple, but appreciated. I'm tall and the seats are an issue. I can deal with a short flight, but any longer, I have to find another airline where I know beforehand I have extra legroom.

Awesome experience. No in-flight video or meal. Still do not like the boarding process.

Really full flight, checked in ASAP and still mid Cs.

On time, good crew, easy flight. Just like the old days!

I was in Comfort and we didn’t get any drinks, chips or anything! First Class got full service on the flight and Comfort got nothing. Seat was horrible and uncomfortable

My flight was delayed by 4 hours in 30 minute increments. The gate agents were amazing but the communication was not. We were told that there was a maintenance issue but they didn't know what it was. That didn't inspire confidence. Then they said they found it and it was fixed and the pilot just needed to sign off. Then the pilot needed to talk to the other pilot from the arriving flight and we'd be fine. Then we were waiting for the pilot to call back. Then the maintenance issue wasn't fixed. Then they decided we were getting a new plane (why didn't they decide this earlier??). Fine. But then they announced we were changing gates AND terminals. And we were boarding in 20 minutes. So we all had to run to the new terminal gate. We could have taken off at that time, but we then had to wait for all the people who rebooked on a different flight to book this flight again. That took 30+ minutes because there was only one gate agent. When everyone ditched this flight, I saw it as an opportunity to upgrade to comfort. Delta, the greedy jerks they are, charged me $121. After their delay, their fault, their issues, couldn't even discount an upgrade. They only handed out $12 meal vouchers for the delay. I can't even get a snack from starbucks for that.

The gentleman at the gate I think his name is RIE was exceptional

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

2 of the seats in row 31 the entertainment system was not working, and one seat the tray table did not go all the way down. Flight arrived early and departed on time which was great.

Waited at the usual crowded gate at DCA where one ends up standing up because there aren't enough seats.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

Inexpensive, got an exit row aisle aeat with no middle passenger, bought a great breakfast sandwich, flight comfortable & arrived ahead of schedule.

I wouldn't say I liked being forced to check my small roller bag at the gate; too many people had bags and were in a higher boarding group.

715PM departure was 2.5 hours late. Received hotel & food voucher but after we already booked a room. Entire team just seemed like they were 2-3 steps behind in execution, and notifcations.

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

Over 5 hour delay with minimal updates or ability to standby for alternative flights. During boarding and 1 hr+ wait for takeoff, seats were drenched w water from air conditioning condensation and always leftover crumbs on carpet and seats

After arriving in Chicago, we were taxiing for 1.5 hours with infrequent and untruthful updates about the amount of time it would take to arrive at the gate. Minimally, the team could have provided timing expectations that were more truthful, especially one their original expectations were not met.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

Wonderful. Quick boarding. Early departure and we arrived 30 minutes early at our destination. Unfortunately, when you arrive early, there is still a departing aircraft at our gate. We had to park for 30 minutes until the gate was clear. So our early arrival was not really early at the gate. Otherwise it was a quick and smooth flight. Appreciated the efficiency.

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

The seats were extremely cramped, with very little legroom or personal space. There was no room left in the overhead bins for a backpack, and the space under the seat in front was so limited that I could barely fit my bag underneath. Overall, the seating arrangement felt very uncomfortable and overcrowded.

As always, most AA flights that we fly are almost ALWAYS delayed and that too multiple times. Very frustrating

The small flights with Valet Luggage has a poor service

Overall a good experience, however Wifi was not working on the flight.

THe flight was an hour late. You got us on the plan and we sat on the ground for 45 minutes with no information from the pilot whatsoever. Worst flight this year.

Going non stop to lax like I paid for. Not stopping in MCI for gas. Too long of delays

Human interaction. Thought there would be more service-even a smile would have been nice.

Incoming flight was delayed, delaying boarding. It then took 30 mins to take off. Took 20 mins to get to a gate because they changed the gate last minute, crew weren’t ready so there was no one staffed to work the jet bridge. Boarding was so disorganized as is usual with American because everyone just stands around the gate regardless of boarding group.

Delays with no explanation. It could have been handled better.

Flight delay for mechanical. Inbound arrived on time. No one said why mechanical delay.

A nightmare. Scheduled flight delayed 2 hours then cancelled because pilot timed out . Unable to find another pilot. Really?! Weather certainly a factor, but JetBlue seemed totally unprepared for the chaos that ensued when flight routes were cancelled. More cancelled flights, finally many of us who had been bumped from other flights were allowed to board a Boston bound plane around 3:00am, delay after delay, sat on tarmac for another half hour while pilot dealt with weight distribution issues (?), arrived in Boston 4:30. Crew were wonderful- same attendants all day and night and they were exhausted. Fortunately for me and my son that Boston was our final destination, not so lucky for many who missed connecting flights.

The flight was delayed 14 hours and communication was very poor. No one seemed to know what was happening and the gate agent was trying to help people for several flights. She was by herself trying to help 100s of people.

JetBlue worker, Blythe, was so amazing at the DCA counter. If it wasn’t for her, I’m not sure we would’ve made it through. Please thank her!

On time, friendly attendants, quick wheelchair assistance and help checking in bags. Also appreciated change in seats, more forward to make it easier for my 97 year old mother to board and exit the plane. Thank you, JetBlue!

Flight was on time and smooth. Customer service was decent

They forced me to check my hand luggage at the gate.

Still hasn’t left. Why are you asking how it was?

My flight got delayed and eventually canceled, then rescheduled. I and several others had a connection from Boston to Paris and asked several times if we would make it. They assured us we would and then rebooked us mid flight without our consent and closed doors early even though they said they communicated we were a bit delayed. We got stranded in Boston and I opted with being rebooked for a different connection to France since they refused to pay for a Hotel. I've now been in Europe for 5 days and still haven't recieved my bags. There was absolutely no urgency for the fact that I'm in a foreign country with absolutely no change of clothes or any of my medication. Such an overwhelming and frustrating experience.

One hour delayed departure resulted in problems with planned ground transportation at my destination.

Plane is old and seats are worn. Add to it the plane was dirty. No plugs for laptop.

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

Complete your trip to Portsmouth with a hotel stay or car rental