$81 Find Cheap Flights from Los Angeles to Portsmouth

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Los Angeles to Portsmouth departing on 7/16. 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.
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Cheap Flights from Los Angeles to Portsmouth (LAX-BOS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Los Angeles 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 Los Angeles to Portsmouth

Fri, Sep 5 - Mon, Sep 8
Spirit Airlines Logo
11:51 am - 11:40 pmLAX-BOS
8h 49m1 stop
Spirit Airlines Logo
11:25 am - 4:09 pmBOS-LAX
7h 44m1 stop
$177Spirit Airlines
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Tue, Jul 1 - Fri, Jul 4
JetBlue Logo
1:10 pm - 9:51 pmLAX-BOS
5h 41mnonstop
JetBlue Logo
8:00 am - 11:20 amBOS-LAX
6h 20mnonstop
$179JetBlue
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Thu, Aug 21 - Sun, Aug 24
United Airlines Logo
10:43 pm - 7:18 amLAX-BOS
5h 35mnonstop
United Airlines Logo
5:30 am - 11:10 amBOS-LAX
8h 40m1 stop
$243United Airlines
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Fri, Jul 4 - Thu, Jul 10
Southwest Logo
10:40 am - 10:45 pmLAX-BOS
9h 05m2 stops
Southwest Logo
8:40 am - 1:30 pmBOS-LAX
7h 50m1 stop
$254Southwest
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Wed, Jul 9 - Wed, Jul 16
United Airlines Logo
10:55 pm - 7:33 amLAX-BOS
5h 38mnonstop
United Airlines Logo
7:35 am - 10:47 amBOS-LAX
6h 12mnonstop
$257United Airlines
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Sat, Aug 9 - Wed, Aug 13
Delta Logo
7:00 am - 3:41 pmLAX-BOS
5h 41mnonstop
Delta Logo
6:15 am - 9:30 amBOS-LAX
6h 15mnonstop
$262Delta
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Fri, Jul 4 - Thu, Jul 10
Southwest Logo
12:35 pm - 10:45 pmLAX-BOS
7h 10m1 stop
Southwest Logo
7:00 am - 1:30 pmBOS-LAX
9h 30m1 stop
$269Southwest
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Wed, Jul 16 - Wed, Jul 23
Delta Logo
9:04 pm - 5:35 amLAX-BOS
5h 31mnonstop
Delta Logo
8:35 pm - 11:52 pmBOS-LAX
6h 17mnonstop
$272Delta
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Fri, Aug 8 - Sun, Aug 17
American Airlines Logo
10:17 pm - 6:52 amLAX-BOS
5h 35mnonstop
American Airlines Logo
5:54 am - 11:26 amBOS-LAX
8h 32m1 stop
$275American Airlines
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Mon, Jul 7 - Tue, Jul 15
American Airlines Logo
12:59 am - 12:26 pmLAX-BOS
8h 27m1 stop
American Airlines Logo
11:04 am - 4:28 pmBOS-LAX
8h 24m1 stop
$299American Airlines
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Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$81
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 22% increase in price.
Flight from Los Angeles to Boston

When to book flights from Los Angeles to Portsmouth

Are your dates flexible? Find out the best times to travel from Los Angeles 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 Los Angeles to Portsmouth

  • Which airports will I be using when flying from Los Angeles to Portsmouth?

    When flying out of Los Angeles you’ll be using Los Angeles. 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 Los Angeles to Portsmouth take?

    Direct flights cover the 2,603 miles separating Los Angeles and Portsmouth in about 5h 31m.

  • How many flights are there between Los Angeles and Portsmouth?

    58 direct flights run between Los Angeles and Portsmouth on a daily basis. On average, there are about 408 departures each week.

  • What’s the cheapest day of the week to fly between Los Angeles and Portsmouth?

    Consider leaving on a Friday and avoid Thursdays if you are looking for the best rates. For your return to Los Angeles, you’ll find the best rates on Tuesdays and the most expensive ones on Mondays.

  • How does KAYAK find such low prices on flights from Los Angeles 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 Los Angeles to Portsmouth.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Los Angeles to Portsmouth?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portsmouth from Los Angeles 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 Los Angeles 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 Los Angeles with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Los Angeles 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 Los Angeles 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 Los Angeles to Portsmouth?

    In the last 72 hours, the cheapest one-way ticket between Los Angeles and Portsmouth found on KAYAK was with Spirit Airlines for $81. Spirit Airlines offered a round-trip connection from $177 and JetBlue from $179.

Top tips for finding cheap flights from Los Angeles to Portsmouth

  • There is no airport in Portsmouth. Instead, you’ll be flying into Boston Logan Airport when flying between Los Angeles and Portsmouth.
  • The cheapest flight from Los Angeles to Portsmouth was found 62 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 November, December and January. The cheapest month to fly is January.

Top 5 airlines serving Los Angeles to Portsmouth

 
Need help choosing which airline to fly with from Los Angeles 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.
8.0
DeltaOverall score based on 7950 reviews
7.9Entertainment
8.2Boarding
7.9Comfort
7.3Food
8.5Crew
Airline reviews

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

10.0 ExcellentIrene, Jun 2025LAX - HNL
Read more Delta reviews

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full flight.

Delta flight was on time, seats were comfortable, and crew was nice.

Bathrooms dirty sinks clogged. No one seemed to clean them. Plane very old

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

New boarding doesn't make sense. Filling front first is slow.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

The food was the worst I’ve had on any flight I’ve ever been on.

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Boarding seemed to be organized bedlam. For what ever reason, preboarding took longer than 20 minutes. Made the plane 20 minutes late taking off. Luckily we arrived on time. Flight crew seemed very friendly. Only slight turbulence.

The personnel were professional and friendly. The Boeing 737 Max 9 is too claustrophobic and was very warm at both airport gates, and still warm in the air.

While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.

get E+, a must for 5 hours flight if you are tall

The first flight was better in terms of the aircraft.

The gate was too far away for the connecting flight

Communication since no reason or explanation was given for 3 hrs delay

Flight was delayed several 3 hours - no reason was given and no communication what so ever.

No overhead baggage room even though I was seated in row 2. Consequently had to check in my carry on bag. Baggage carousel was jammed. Took 45 min to get my bag.

Excellent. Although they used to greet me as a mosaic member and provide a free drink, early boarding helps me to keep coming back to JetBlue.

Cancelled flight with no specific instructions to get a boarding pass for another flight. The whole flight of people were in line for an hour because there was only 1 person to help at the desk. This was unusual for JetBlue.

It was too hot in the cabin. The AC did not help.

Except for the 28 minute delay leaving and the earlier reschedule to a later takeoff time the flight was good.

Loved the leg room and tvs screens on the seats and free WiFi. Wish the price was lower and could save by rebooking

It took 1-1/2 hours to get our luggage after we landed. That to me is unacceptable

The flight was delayed for 4 hours. Once onboard the crew was wonderful.

Eventless. It was a good flight and good crew. Can’t complaint.

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

The plane was late and then sat on the runway for almost 45 minutes before taking off.

We kept being told that the flight was full and that all overhead compartments were full and therefore had to check in our hand luggage. We were some of the last people to board and noticed that there was still sufficient space in the overhead compartments. We were obliged to check in hand luggage when there was space and so had to wait at luggage retrieval which took a while to then noticed damage to our luggage - not a great experience!

Worst seats I’ve ever had !!! The seats were very narrow and uncomfortable and misaligned with the seats in front of mine leading to bottom of the seat in front of mine pressing on my legs for 15.5 hours !

This was an overnight flight. There was no meal service in first class, just a simple snack basket was offered along with beverages. There should have been some type of continental breakfast prior to arrival in PHL. As an Executive Platinum American Airlines Advantage member, I received no name recognition from the first class flight attendant. When disembarking at PHL, the flight attendants were more interested in their cell phones than saying "thank you" to the passengers as they disembarked.

The flight was quick and to the point. The crew just did their job w/o excessive talking and everything was just perfect.

Awkward carry on process. Forced to check all carry on. No overhead space of worthiness. Left delayed, but made up the time. Crew was amicable.

Amazingly comfy flight - I had upgraded for a reasonable price and it was worth it. The food also was good.

Had to wait on pilot and crew to depart and had to wait to arrive at the gate because they only had 2 crews working. Delays, delays....Planes just keep getting smaller and tighter and they nickle and dime for everything. When will an airline actually wake up and make flying more enjoyable?

Too many time late and postponed No electrical power for my electric devices

Spirit is by far the worst airline to travel with, period. Seats are cardboard, flight attendants need anger management and if you ask for water, you’re basically a criminal. I don’t care how much it costs but I will travel with an airline who actually cares about their customers. Oh and one more thing, the next time your gate agent puts his foot on someone’s baggage's scale, I hope they get what’s coming next, a viral video of your scams. You suck Spirit, do better.

I mean, it’s Spirit. But it was frustrating to have our flight canceled, get bumped to a later flight, and then Spirit was unwilling to check our bag until 4 hours before our flight… tell us we could not sit in the waiting area’s chairs… and really negative experience getting checked in and dropping the bag.

terrible service, no room for a dog underfoot, a broken chair that is impossible to sit on and all this costs a lot of money

It was fast but uncomfortable seats. Had to pay a bit extra not sure why? Maybe in selection of all my 4 tix together ? Just knew I had a balance before getting boarding pass online when departing from satx ? And flight was delayed..

Seats are uncomfortable and too close together. Also, you missed my connection in Vegas on the way back and I ended up sleeping in the airport, flying back to Burbank instead of LAX and I got home 12 hours late.

Non-professional acting crew, Very uncomfortable seats…!! Very bad pricing with all the add-ons for seat choice, luggage fees, etc….soon you’ll charge extra for oxygen. The ticket price means Nothing because in the end, the actual amount i paid, i could have and will in the future continue to fly on a real airline…

With this price, I shouldn't complain on anything. I understand I have to pay for every services they provide. The plane could smell a little better. Advise them to use frebeeze to freshen up the interior a little bit.

Terrible. 1st and last flight on Spirit. Check in process was a nightmare. Despite arriving 1.6 hours before flight we had to be pulled from the ridiculously long line to “self check” our bags which took 10 min and required assistance. Seats are very uncomfortable , don’t move, no pockets, no entertainment, no wifi Basically like taking a time capsule back to the 70s. No thank you.

Arrived at 3:45am & found a long line where Spirit employees were standing at the counter but no one was working. Worried if I’d make the flight. Line started moving about 4:15 and got to check my bag at 4:30, realize my flight was at 5:25. Lines thru security were long, got to flight and walked right on. Spirit was cheapest when selected but not after $70/bag and $30/seat - extra $200.

Everything you need to know for your flight from Los Angeles to Portsmouth

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