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Find cheap flights from San Francisco to Portsmouth from $167

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Portsmouth departing on 7/9. 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
0 bags
Wed 7/10
Wed 7/17

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Low season

January

High season

July

Cheapest flight

$167
Best time to beat the crowds with an average 21% drop in price.
Most popular time to fly with an average 21% increase in price.
Flight from San Francisco to Boston

When to book flights from San Francisco to Portsmouth

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

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

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

    Direct flights cover the 2,696 miles separating San Francisco and Portsmouth in about 5h 31m.

  • How many flights are there between San Francisco and Portsmouth?

    61 direct flights run between San Francisco and Portsmouth on a daily basis. On average, there are about 431 departures each week.

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

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

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

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

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

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

    In the last 72 hours, the cheapest one-way ticket between San Francisco and Portsmouth found on KAYAK was with United Airlines for $167. JetBlue offered a round-trip connection from $199 and American Airlines from $206.

See more FAQs

Top tips for finding cheap flights from San Francisco to Portsmouth

  • There is no airport in Portsmouth. Instead, you’ll be flying into Boston Logan Airport when flying between San Francisco and Portsmouth.
  • The cheapest flight from San Francisco to Portsmouth was found 79 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 February.
See more tips

Top 5 airlines serving San Francisco to Portsmouth

Need help choosing which airline to fly with from San Francisco 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
Alaska AirlinesOverall score based on 9254 reviews
8.6Crew
8.2Boarding
7.3Entertainment
7.9Comfort
7.3Food
Airline reviews

Everything was great but there were no entertainment options available.

6.0 GoodKyndra Homuth, Jun 2024SFO - PDX
Read more about Alaska Airlines reviews

Everything was great but there were no entertainment options available.

Flight was delayed 2 hours. It was too cold inside the cabin. My seat mate had no jacket so she was shivering the entire flight. The stewardess says there’s no available blanket.

The plane had to sit on the tarmac for 45 minutes once it had landed. Not Alaska’s fault.

Flight was cancelled just before we boarded. I had to stayed an extra night in SF and arrived one day late. Also I had to flight back JFK and not Newark since they didn't have flight to Newark until very late the following day. A real bad experience on this flight. It took me 2 days to get back home.

The flight was delayed by more than two hours. A notification ahead of time would be most helpful.

Plane hit turbulence diverted to Houston. We'll probably get in after 3am

Given incorrect gate upon check-in, corrected by the gate attendant, D6 rather than D5, minor inconvenience. As with the previous flight, passengers were admonished to voluntarily gate-check carry-on luggage with the statement that those in the last boarding group would have no choice but to do so. If the Boeing 737 MAX8/MAX9 doesn't have room for carry-ons it's an interior design flaw on the part of Boeing. Posting an advance warning would be helpful, such as "Boeing 737 MAX planes feature limited carry-on space. Please be aware." SFO's amenities and TSA much better than MCO's. Crew was amazing! Brought my own food because Alaska's onboard selection has soy in everything. Beverage service was excellent. This was the first and last trip with Alaska after the previous flight's issues. It's no reflection on the crew of this flight. They were great.

The flight was mostly smooth and quiet. No seatback screens.

I enjoyed the leg room at my seat, but I was in an exit row.

Boarded the plain and had to wait 1 hour for crew Captain to arrive from another flight

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

There was a loud squeaky sound the whole time we were flying.

I didn’t not like that I could not select my seat and ended up with the worse seat.

The landing was bad and the hostess came two times and i was sleeping but when she served the person that nexts to me I woke up and she didn’t even asked me if I need any drink or snacks two times!!!!

Plane was late because of a mechanical malfunction and the food listed as available was not. Flight attendants seem over worked and under paid. They just done seem happy. And that can be seen in their faces.

Waited 3 hours on a plane to de-ice due to manpower issues. Waited another hour and a half once we landed because of a gate issue. Missed my connections. Created. A total of 13 hours of delay.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

Like most domestic flights in the US, you are basically on your own with this airline when it comes to food, so be sure to purchase meals and drinks ahead of time or expect to arrive starving and dehydrated (like I was).

They put me on a chair in between two men, one overweight who was almost falling on top of me, and the other was even uncomfortable because I was half falling because of what the other was pushing me. I stayed with. my feet were swollen from fluid retention and from being unable to accommodate myself. it was very uncomfortable. I asked for help but they told me that the flight was full and they couldn't help me. I got off the plane almost unable to walk due to the inflammation. and then at FLL airport I asked for help because I couldn't go to my next flight, which was a connection.

The walk from baggage claim to the taxi is very difficult for older people I will never fly into JFK again. It is physically challenging

Overall fine but both ways for this trip was delayed.

Flight was delayed by almost 5 hours. Suitcase was not loaded despite the flight being near empty (my colleagues’ suitcases did reach JFK, unlike mine). Had to argue on phone to get JetBlue to deliver the case to my hotel. Never again

The flight was excellent. The crew was welcoming and attentive.

Great! I love Jet Blue. My favorite airline! Very efficient, clean and timely.

Run out of snack choices. Why are the seats not padded for your butt? Are we sitting on blocks of wood or metal for $250-300 a pop? This ain’t spirit. Let’s get it together people

We were told that our flight would be delayed for 90+ minutes because of weather, so we went to get something to eat only to have them randomly start boarding 15 minutes after the announcement, with no warning.

Entertainment... No earphones passed out. Many including me couldn't use the TV. Legroom was good. Crew was indifferent and a bit surly. Free wifi was a nice convenience. Check in desk location was unknown. Gate number on the boarding passes was wrong.

Going through JFK’s security is a mess. The TSA security said no shoes on the bins. So, we place our shoes in the belt and they came out all over the belt. Boarding was delayed and Flight as well.

Horrible, the flights kept delaying, so it is obvious that we won't be able to make it to the next connection. No easier/real agent on site to help you figure this out. UA agent on other counters refuse to assist you and direct us to use the QR code/call customer service. So inefficient and poor. While technology seems convenient, but it's not the best interest/experience for customers need help while there is active issue need assistance.

Flight was delayed due to the late arrival of the catering truck, which is quite unacceptable. There was a beverage service, but no pretzel, or cookie, or nuts were served in coach.

On time take off…US cabins look tired and need of refresh!

Crew was great and did their best to make us comfortable and captain came out at the beginning to announce why the flight was delayed, weather situation up ahead, and kept us updated throughout the flight.

United WiFi is consistently unusable (it can take 10 mins to load a single web page). If you need Wifi to do work, be prepared to lose half a day of productivity.

Awful. I got stuck next to a person carrying a dog and behind someone with a dog. People need to board these dogs downstairs. The cabin is crowded enough with your pets

Packed in like sardines, very uncomfortable. Sitting the aisle my shoulder was rammed into numerous times by rushing flight attendants. Also flight was very cold.

Airline did not explain reasons why flight was delayed two hours. Explanations were badly needed and rarely provided. Problem seemed to clearly be the airline’s fault and not the fault of the weather or airport.

Very uncomfortable seats and seat backs, and I am only 5’9”. Delayed due to crew issues, spent a long time with no ventilation. Teeny overhead bins. Wifi worked well. Arrived safely.

I was delighted that we were able to get on the 4:40 pm flight rather than our original booking at 6:55 pm!! Other than that, the flight was comfortable and landed early😊

The flight was delayed several times without explanation. The seats were terribly uncomfortable and wifi isn’t included. All these make for a less than ideal flight.

Internet service was erratic. Crew service was poor and slow. My luggage on this non-stop flight was lost and not recovered

Flight was 1/2 hour delayed leaving Phoenix. Otherwise it was an average flight. Flight crew on this trip was very nice.

Horrible - they lied to me about baggage & boarding, even though I specifically spoke to their agents the day before my flight about my issue. When I showed up they did not let me board and stranded me at my airport until I bought a new flight with money I did not have to spend.

The experience was great and much better than the flight going out. of course I was in first class but the service was excellent

Comfort of seats, ease of boarding. Food selection could be better

Food options were limited which is absolutely embarrassing for a Flight of this size The staff did not come around as much and I am not accustomed to such poor service from American Airlines Drinks I believe were limited to soda and water

Crew were attentive and friendly. Flight was smooth and early! I enjoyed the less crowded plane. Thank you!

We are gluten free, there were not any available complimentary gluten free options.

No meal on a cross country flight? SFO-MiA is pretty much the definition of a coast to coast flight. No meal provided. Sky high wi-fi rates too. Stop nickel and diming your customers.

Book cheap flights from San Francisco to Portsmouth

Recent round-trip flight deals

8/14Wed
nonstopJetBlue
5h 41mSFO-BOS
8/24Sat
nonstopJetBlue
6h 30mBOS-SFO
$199
8/12Mon
nonstopJetBlue
5h 37mSFO-BOS
8/20Tue
nonstopJetBlue
6h 30mBOS-SFO
$203
8/14Wed
1 stopAmerican Airlines
8h 20mSFO-BOS
8/21Wed
1 stopAmerican Airlines
9h 40mBOS-SFO
$206
8/12Mon
nonstopAlaska Airlines
5h 36mSFO-BOS
8/23Fri
nonstopAlaska Airlines
6h 35mBOS-SFO
$207
8/27Tue
1 stopAmerican Airlines
10h 51mSFO-BOS
9/10Tue
1 stopAmerican Airlines
8h 45mBOS-SFO
$221
8/13Tue
nonstopDelta
6h 00mSFO-BOS
8/22Thu
nonstopDelta
6h 51mBOS-SFO
$222
8/27Tue
1 stopUnited Airlines
9h 39mSFO-BOS
9/10Tue
nonstopUnited Airlines
6h 32mBOS-SFO
$223
8/6Tue
nonstopAlaska Airlines
5h 36mSFO-BOS
8/20Tue
nonstopAlaska Airlines
6h 35mBOS-SFO
$228
11/2Sat
nonstopDelta
5h 37mSFO-BOS
11/11Mon
nonstopDelta
6h 53mBOS-SFO
$236
7/4Thu
1 stopUnited Airlines
7h 48mSFO-BOS
7/5Fri
nonstopUnited Airlines
6h 27mBOS-SFO
$282

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Recent one-way flight deals

7/9Tue
nonstopUnited Airlines
5h 42mSFO-BOS
$167
8/1Thu
1 stopAmerican Airlines
9h 50mSFO-BOS
$168
7/4Thu
nonstopJetBlue
5h 37mSFO-BOS
$169
7/11Thu
1 stopSun Country Air
20h 31mSFO-BOS
$173
7/4Thu
1 stopSun Country Air
14h 05mSFO-BOS
$177
7/9Tue
nonstopJetBlue
5h 36mSFO-BOS
$180
7/19Fri
nonstopAlaska Airlines
5h 36mSFO-BOS
$194
8/13Tue
2 stopsAlaska Airlines
19h 45mSFO-BOS
$197
9/2Mon
nonstopDelta
5h 46mSFO-BOS
$214
6/18Tue
nonstopDelta
5h 53mSFO-BOS
$242

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Last minute flights from San Francisco to Portsmouth

Last minute flight, train and bus deals

6/11Tue
nonstopJetBlue
5h 44mSFO-BOS
7/10Wed
multi-stopJetBlue
10h 47mBOS-SFO
$393
6/11Tue
nonstopDelta
5h 51mSFO-BOS
7/11Thu
nonstopDelta
6h 52mBOS-SFO
$400
6/11Tue
multi-stopAlaska Airlines
8h 10mSFO-BOS
7/11Thu
nonstopAlaska Airlines
6h 30mBOS-SFO
$409
6/11Tue
nonstopJetBlue
5h 46mSFO-BOS
7/12Fri
nonstopJetBlue
6h 29mBOS-SFO
$410
6/12Wed
nonstopDelta
5h 51mSFO-BOS
6/24Mon
nonstopDelta
6h 53mBOS-SFO
$435
6/13Thu
multi-stopAmerican Airlines
8h 36mSFO-BOS
7/2Tue
multi-stopAmerican Airlines
8h 55mBOS-SFO
$449
6/11Tue
nonstopAlaska Airlines
5h 42mSFO-BOS
7/13Sat
nonstopAlaska Airlines
6h 30mBOS-SFO
$465
6/11Tue
multi-stopUnited Airlines
9h 49mSFO-BOS
6/13Thu
nonstopUnited Airlines
6h 28mBOS-SFO
$488
6/12Wed
multi-stopUnited Airlines
7h 55mSFO-BOS
6/20Thu
nonstopUnited Airlines
6h 28mBOS-SFO
$493
6/12Wed
multi-stopAmerican Airlines
8h 34mSFO-BOS
6/30Sun
multi-stopAmerican Airlines
8h 55mBOS-SFO
$517

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Flights to Portsmouth