$129 Find Cheap Flights from Miami 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 Miami to Portsmouth departing on 9/2. 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

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$238
Typical prices: $156-$307
Frontier
Mon 9/14Tue 9/15
MIA - BOS • 1 stop
Cheapest non-stop
$238
Typical prices: $157-$311
American Airlines
Sat 9/5Tue 9/8
MIA - BOS • Non-stop
Arrival airport
You can't fly directly to Portsmouth. It is served by Boston (BOS), located 50.3 miles from Portsmouth.
FAQs
FAQs
FAQs
FAQs
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Portsmouth!
Flight Deals
Useful Info
Flight Deals

Cheap Flights from Miami to Portsmouth (MIA-BOS)

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

Mon, Sep 14 - Tue, Sep 15
Frontier Logo
5:32 am - 12:09 pmMIA  Miami-BOS Boston Logan Intl
6h 37m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
12:52 pm - 8:38 pmBOS  Boston Logan Intl-MIA Miami
7h 46m1 stop Atlanta Hartsfield-Jackson
$238Frontier
Mon, Sep 28 - Wed, Sep 30
Frontier Logo
5:32 am - 12:09 pmMIA  Miami-BOS Boston Logan Intl
6h 37m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
12:54 pm - 8:38 pmBOS  Boston Logan Intl-MIA Miami
7h 44m1 stop Atlanta Hartsfield-Jackson
$238Frontier
Sat, Sep 5 - Tue, Sep 8
American Airlines Logo
5:55 pm - 9:30 pmMIA  Miami-BOS Boston Logan Intl
3h 35mnonstop
American Airlines Logo
7:20 am - 10:49 amBOS  Boston Logan Intl-MIA Miami
3h 29mnonstop
$238American Airlines
Sat, Sep 5 - Sat, Sep 12
American Airlines Logo
9:40 am - 1:10 pmMIA  Miami-BOS Boston Logan Intl
3h 30mnonstop
American Airlines Logo
5:00 am - 8:28 amBOS  Boston Logan Intl-MIA Miami
3h 28mnonstop
$238American Airlines
Wed, Sep 2 - Mon, Sep 7
Delta Logo
7:58 pm - 11:36 pmMIA  Miami-BOS Boston Logan Intl
3h 38mnonstop
Delta Logo
7:20 am - 10:52 amBOS  Boston Logan Intl-MIA Miami
3h 32mnonstop
$243Delta
Tue, Sep 22 - Wed, Oct 14
Delta Logo
7:58 pm - 11:30 pmMIA  Miami-BOS Boston Logan Intl
3h 32mnonstop
Delta Logo
7:15 am - 10:52 amBOS  Boston Logan Intl-MIA Miami
3h 37mnonstop
$244Delta
Wed, Sep 23 - Wed, Sep 30
United Airlines Logo
11:26 am - 5:52 pmMIA  Miami-BOS Boston Logan Intl
6h 26m1 stop Newark
United Airlines Logo
6:00 am - 12:13 pmBOS  Boston Logan Intl-MIA Miami
6h 13m1 stop Newark
$252United Airlines
Tue, Sep 15 - Tue, Sep 15
United Airlines Logo
7:00 am - 12:47 pmMIA  Miami-BOS Boston Logan Intl
5h 47m1 stop Newark
United Airlines Logo
6:00 pm - 11:52 pmBOS  Boston Logan Intl-MIA Miami
5h 52m1 stop Newark
$257United Airlines
Sat, Sep 5 - Sat, Sep 12
Southwest Logo
7:45 am - 1:45 pmMIA  Miami-BOS Boston Logan Intl
6h 00m1 stop Lambert-St Louis
Southwest Logo
5:50 am - 1:35 pmBOS  Boston Logan Intl-MIA Miami
7h 45m1 stop Baltimore/Washington
$258Southwest
Sat, Sep 5 - Wed, Sep 23
Southwest Logo
7:45 am - 3:15 pmMIA  Miami-BOS Boston Logan Intl
7h 30m1 stop Lambert-St Louis
Southwest Logo
8:15 am - 1:35 pmBOS  Boston Logan Intl-MIA Miami
5h 20m1 stop Baltimore/Washington
$258Southwest
Useful Info

Good to know

Low season

January

Cheapest flight

$129
Best time to beat the crowds with an average 36% drop in price.
Most popular time to fly and prices are also 20% lower on average.
Flight from Miami to Boston

When to book flights from Miami to Portsmouth

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

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

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

    Direct flights cover the 1,259 miles separating Miami and Portsmouth in about 3h 14m.

  • How many flights are there between Miami and Portsmouth?

    34 direct flights run between Miami and Portsmouth on a daily basis. On average, there are about 243 departures each week.

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

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

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

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

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

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

    In the last 5 days, the cheapest one-way ticket between Miami and Portsmouth found on KAYAK was with Frontier for $80. Frontier offered a round-trip connection from $65 and Delta from $119.

Top tips for finding cheap flights from Miami to Portsmouth

  • There is no airport in Portsmouth. Instead, you’ll be flying into Boston Logan Airport when flying between Miami and Portsmouth.
  • The cheapest flight from Miami to Portsmouth was found 47 days before departure, on average.
  • Book at least 1 week 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 January.

Reviews of the top 5 airlines serving Miami to Portsmouth

 
Need help choosing which airline to fly with from Miami 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.
7.8
DeltaOverall score based on 8491 reviews
8.1Boarding
8.5Crew
7.8Comfort
7.8Entertainment
7.2Food
Airline reviews

On the return flight, flight attendant Britt went out of her way to inform passengers that several of us had tight connections.

10.0 ExcellentAnonymous, Apr 2026
Read more Delta reviews

On the return flight, flight attendant Britt went out of her way to inform passengers that several of us had tight connections.

Delta continues to set the benchmark for traveler-friendly service with minimal disruption and clear communication within the mainland US (coast to coast). I am consistently pleased to be a Delta customer, and this experience once again met my expectations. There was a brief delay departing from MIA due to a technical issue that required the aircraft to return to the gate. However, the situation was handled professionally and transparently. Fortunately, my planned layover allowed ample buffer time, so the adjustment caused no stress. Overall, another smooth and reassuring experience.

Flight was an hour late, who knows why. It was OK, nothing outstanding.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

The Dekta Rep that checked us in was great. She's very personable, pleasant, and can tell she enjoys her job.

Good and consistent Printer in lounge did not work for me :(

The 1st class male crew member was very pleasant - the short female with round glasses , maybe in 50’s had no personality- never spoke when delivering my food, drink, & never smiled the whole trip! In fact looked annoyed when the boarding proses was happening- I would never hire this woman - unfriendly . Have never dealt with a crew member like her-

The main person that was coordinating everything was a short white/light skin Spanish man and he was very rude. It honestly made me feel like it was everyone’s First day at work. His announcements were very not reasonable and they did not make sense. The stewardess on the flight that made the announcements she didn’t even know what she was talking about she sounded inebriated. There were no snacks or drinks on our flight there wasn’t even much turbulence. This flight was not enjoyable nor was it what a Delta flight should be and just this past week I flew with Delta 3 times.

I like that it got us where we were going. Everything else needed work. It was 1/2 hour late and we took off an hour late. The plane had to be cleaned and the disabled loaded on board before we could take off which took forever and then we sat at the terminal FOREVER before we took off. The ride was so bumpy that they couldn’t serve drinks and snack but to about 1/2 the plane. Seriously we should have flown out of Fort Lauderdale. We probably would’ve gotten home several hours earlier.

The plane looks and feels like we are traveling in a 3rd world country airplane. Dirty bathrooms, horrible food, old and uncomfortable setting, my son’s little table was broken, the chair would stay recline, an so on.

There was a piece of plastic baked into my buttermilk biscuit! I have a pictures. The flight attendants in first class were really apologetic, and tried to rectify the situation. I I am very appreciative that they were able to give me some packets of pretzels and gummy bears. I understand they don't personally handle the food until warming it up so I know it wasn't their fault. I don't know whether it was a newer aircraft, or different food packaging, but I was happy that when the food was being warmed up - it didn't smell like plastic. Jokes on me with finding plastic in my food.

We used Kayak to reserve our tickets and specifically checked the luggage option which was a more expensive option. When we arrived at the terminal we had to pay an extra $90 per suitcase for the three passengers. This has been a pattern for the past 3 years. Why charge for a more expensive luggage option, and the ticket price not include luggage?

Everything was on time and service on the flight was great!

Staff members were not helpful they ignored all calls for an attendant.

Terrible. Delayed 7 hours, and cancelled the flight, leaving me stranded and out of pocket $500 for an alternative last minute flight

Horrible , we missed our flight because they were way to busy for there airport to handle. We waited in line for the over three hours to be told there’s nothing they can do. Worst experience in any airport ever ,staff member from Lufthansa made it there job to be rude and unhelpful. I’m going to be calling to see if I can change flights because a 3 hour layover in a poorly ran airport isn’t enough.

Well....let's start from the point that I had to stay in airport for 12 hours instead of 2 that was scheduled. Poor company and even worst customer service. Never again....

The flight was delayed almost 2 hours. Bad customer service etc. I will never fly Luthansa. Ever!!!

Boarding was friendly and quick. While the plane model was older with no live tv, the entertainment was full of movies and tv shows. All food was available. Pilots were very communicative with status of the flight. Flight landed on time.

Entertainment could be updated - lots of really old movies should be reviewed and updated.

The flight was delayed 4 hours, and when we finally boarded, they told us that the fuel was only just then checked. So, we waited even longer to take off.

Everything was done like clockwork and I find no fault with the airline.

Like all planes recently, entertainment is achieved by giving the patron free WiFi and letting them stream shows via the screen on a phone or tablet.

I thought American Airlines did well considering the adverse weather situation over July 21 and 22. I especially appreciated the consideration given to me when I got stuck in Miami on my way to Boston from Charleston, West Virginia. Thank you for providing a voucher for an overnight stay. Though it was only a few hours of sleep, it was very helpful. I was able to reschedule my medical appointment and got back to the Boston area on the 1st flight out of Miami as a standby passenger. It was very helpful that I was given number one priority on the standby list.

- flight was delayed several hours due to weather (understandable) - flight delayed further and we were told by attendants "we are not sure where the pilots are but they are on their way" as we have to find different pilots for the flight - announcements over the PA were somewhat unprofessional by the attendants, seems they need more training and were not reading off the script. They showed their young age and immaturity in their communications with the passengers. They were not clear and lacked professional communication language. - going from a hub to hub we were also parked at the tarmac at ohare for an additional hour and kept being told "few more minutes". Please just let the passengers know the real wait time instead of hiding the truth. We understand there is traffic and weather delays, but we just want transparency. There are several logistics of our lives that revolve around what the attendants and pilots are sharing with us but they are not being transparant.

As I said I never took the flight back from due to earlier delayed that prevented from taking the second trip back and nobody helped me to rebook from kayak

American Airlines changed are gate no fewer than four times. Walking back and forth from one concourse to another was exhausting, especially after all the flight delays.

It was awful. The communication between corporate and the crew on the ground left more to be desired. The crew even said that Corporate was waiting on answers because they themselves didn't know. Every hour, there was a new excuse. I also understood that passengers were angry, but the crew should have done a better job at crowd control. There was a racial exchange between passengers that could've been avoided has the crew acted sooner.

We sat on plane at gate delayed without communication as to why we were just sitting there

Trash. Sat on the runway for 40 mins…missed connecting flight because of it now I’m stuck. Thanks…a whole fkn lot.

My checked in luggage cost was $59, almost ticket price. The first 13 rows were empty, but fly attendant did not alow women with little boy change her middle sit, sweet boy was crying, I am so sorry for mother and passengers. At the end of the flight the cabin became impossible cold. Only good was timing of departure and early landing, but it suppose to be normal.

I tried to book a flight with Jet Blue. Your third party company hijacked my attempt with a website that looked like I was booking with Jet Blue. I realized it when I paid. I tried to cancel and was told by a man in India that there were no refunds. $735 stolen, Thanks Kayak!

The flight out was delayed from 3:40pm to 5pm and again to 8pm. We boarded after 5pm, had to disembark because they could not get the Engine started, then we switched gates and got a new plane and did not board until after 8pm.

Boarding was easy. Provided drinks and snacks. Good aircraft and staff

Flight was quick, less time than expected, and the attendants all friendly and helpful. We had paid extra for more leg room and were very comfortable. Haven't flown JetBlue in quite a while. Glad to be back!

JetBlue not only has the most comfortable planes, but also used to have the best customer service. Lorie Wright, the lady at the gate was very rude not only to me, but to other passengers as well. Her colleague, the gentleman was also not very friendly. They both were acting like they were doing passengers a favor. The crew on board was very nice.

My experience with JetBlue was fine BUT I am very upset with Kayak! JetBlue had delayed our scheduled departure by an hour and you NEVER notified me of the change. I did not hear directly from JetBlue because the trip was booked through Kayak, a mistake I will not repeat. Your reminder of the our trip last week still had the WRONG departure time. Our return trip has also changed, and again no notice from you.

Not having an assigned seat until boarding and then having to check my bag.

I purchased ticket so our daughter ( a minor) can sit next to her mother. No help at gate after kayak insisted that this could be done. She ended sitting by herself

Terrible. There was a lot of misleading information regarding ticketing, seat upgrades, & boarding group. I also expect my seat will recline. I have back problems & it is very painful for me of the seat doesn’t recline. In addition, when I choose a fare that allows me a carry-on bag, I expect to be able to carry it on. Not be forced to check it. Thos happened on my flight to MCO & back to Boston. Not sure I will ever fly JetBlue again. Further I bought the ticket through hat deal. I will NEVER do that again. They were incapable of providing an accurate record locator # for either leg of the trip. I had to call them before each flight with me VERY stressed about whether I would actually be able to get on my flight. Who does that? Who books flight & then FAILS to give an accurate record locator? Twice!

Frontier feels like a family I Worked for Eastern Airlines back in the day and I felt the family vibe that I had then. Thank you

It was an early flight and most people napped/slept and the crew let us which was nice.

It didn’t happen. I booked it and then was told it wasn’t available and then forced to pay far higher prices for a worse option

Although an hour and a half early was told by staff at check in they had overbooked and could not check us in for the flight.

Cancelled and declined to find alternatives Earlier flight is 2 days later Sent the cancellation notification very late, wish I knew earlier would have stayed to watch the Miami open final game Very disappointing service

The worst service , the agents from the counter are really bad . Poor customer service . They didnt help me to get in the flight . I was on line when they close the flight without telling and I couldn’t board the plane . I will like to get my money back ey back because it was their fault. Really bad management , bad manners, bad additud

At check in they don’t let you be with the person you are traveling with unless you pay $40 per seat . Really bad policy they have

I arrived 1 hour prior to boarding, and they said I was too late for a domestic flight. First time I heard that :-(

they charge too much when you arrive in the air port

The service was amazing. Frontier should allow passengers who pay for check-in bags one carry-on bag at no additional cost.

Everything you need to know for your flight from Miami to Portsmouth

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