$136 Find Cheap Flights from Boston to San Francisco Bay Area - 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 Boston to San Francisco Bay Area departing on 9/5. 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 Boston to San Francisco Bay Area

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
San Francisco
San Franciscononstop$279
San Jose
San Jose1 stop$285
San Francisco
San Franciscononstop$279
San Jose
San Jose1 stop$285

Book Cheap Boston to San Francisco Bay Area Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to San Francisco Bay Area 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 Boston to San Francisco Bay Area

Mon, Aug 31 - Tue, Sep 8
Frontier Logo
12:45 pm - 7:03 pmBOS  Boston Logan Intl-SFO San Francisco
9h 18m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
8:23 pm - 10:22 amSFO  San Francisco-BOS Boston Logan Intl
34h 59m2 stops Los Angeles Los Angeles Orlando
$279Frontier
Sun, Sep 20 - Sun, Sep 27
American Airlines Logo
6:00 am - 11:30 amBOS  Boston Logan Intl-SFO San Francisco
8h 30m1 stop Philadelphia
American Airlines Logo
10:46 pm - 9:39 amSFO  San Francisco-BOS Boston Logan Intl
7h 53m1 stop Chicago O'Hare Intl
$279American Airlines
Wed, Sep 16 - Mon, Sep 21
Multiple Airlines Logo
6:09 pm - 9:40 pmBOS  Boston Logan Intl-SFO San Francisco
6h 31mnonstop
Multiple Airlines Logo
10:05 pm - 12:07 pmSFO  San Francisco-BOS Boston Logan Intl
11h 02m1 stop Atlanta Hartsfield-Jackson
$279Multiple Airlines
Wed, Sep 2 - Sat, Sep 12
Multiple Airlines Logo
12:45 pm - 7:03 pmBOS  Boston Logan Intl-SFO San Francisco
9h 18m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
2:00 pm - 11:19 pmSFO  San Francisco-BOS Boston Logan Intl
6h 19mnonstop
$279Multiple Airlines
Tue, Aug 25 - Wed, Aug 26
Frontier Logo
12:45 pm - 7:03 pmBOS  Boston Logan Intl-SFO San Francisco
9h 18m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
10:35 pm - 11:47 amSFO  San Francisco-BOS Boston Logan Intl
10h 12m1 stop Atlanta Hartsfield-Jackson
$280Frontier
Sat, Sep 5 - Fri, Sep 11
United Airlines Logo
5:01 pm - 10:50 pmBOS  Boston Logan Intl-SJC San Jose
8h 49m1 stop Chicago O'Hare Intl
United Airlines Logo
2:10 pm - 1:10 amSJC  San Jose-BOS Boston Logan Intl
8h 00m1 stop Chicago O'Hare Intl
$285United Airlines
Sat, Sep 5 - Wed, Sep 9
United Airlines Logo
6:01 am - 11:45 amBOS  Boston Logan Intl-SJC San Jose
8h 44m1 stop Chicago O'Hare Intl
United Airlines Logo
6:30 am - 7:19 pmSJC  San Jose-BOS Boston Logan Intl
9h 49m1 stop Chicago O'Hare Intl
$285United Airlines
Sun, Sep 6 - Sat, Sep 12
Delta Logo
10:50 am - 5:27 pmBOS  Boston Logan Intl-SJC San Jose
9h 37m1 stop Los Angeles Los Angeles
Delta Logo
12:51 pm - 1:17 amSJC  San Jose-BOS Boston Logan Intl
9h 26m1 stop Atlanta Hartsfield-Jackson
$285Delta
Sat, Sep 5 - Thu, Sep 10
Delta Logo
10:50 am - 4:09 pmBOS  Boston Logan Intl-SJC San Jose
8h 19m1 stop Los Angeles Los Angeles
Delta Logo
5:13 pm - 6:30 amSJC  San Jose-BOS Boston Logan Intl
10h 17m1 stop Salt Lake City
$285Delta
Tue, Sep 1 - Sat, Sep 5
American Airlines Logo
2:32 pm - 10:32 pmBOS  Boston Logan Intl-SJC San Jose
11h 00m1 stop Dallas/Fort Worth
American Airlines Logo
12:42 pm - 11:24 pmSJC  San Jose-BOS Boston Logan Intl
7h 42m1 stop Phoenix Sky Harbor Intl
$285American Airlines
Booking Insights

KAYAK's insights & trends for Boston to San Francisco Bay Area flights

Get data-powered insights and trends into flights from Boston to San Francisco Bay Area to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Boston to San Francisco Bay Area flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to San Francisco Bay Area from Boston found in the last 5 days was to San Francisco, at $252 round-trip. The most popular route is from Boston (BOS) to San Francisco (SFO), and the cheapest round-trip airline ticket found on this route in the last 5 days was $252.

What is the cheapest time of day to fly to San Francisco Bay Area?

The average price for all round-trip flights from Boston to San Francisco Bay Area depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to San Francisco Bay Area is generally at night, when round-trip flights cost $372 on average. Morning departures are around 10% cheaper than evening flights, on average. The most expensive time of day to fly to San Francisco Bay Area is generally in the evening, which is peak travel time and where the average cost of a ticket is $505.

Can I save money by flying with a layover from Boston to San Francisco Bay Area?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $516, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Boston to San Francisco Bay Area?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to San Francisco Bay Area, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boston to San Francisco Bay Area is January, when tickets cost $341 (return) on average. On the other hand, the most expensive months are June and April, when the average cost of round-trip tickets is $460 and $455 respectively.

What’s the cheapest day of the week to fly from Boston to San Francisco Bay Area?

The average price of all round-trip flights from Boston to San Francisco Bay Area clicked on KAYAK for each day over the last 12 months.

When flying from Boston to San Francisco Bay Area, you should consider leaving on a Wednesday and avoid Sundays if you are looking for the best rates. For your return to Boston, you’ll find the best rates on Wednesdays and the most expensive ones on Sundays.

How far in advance should I book a flight from Boston to San Francisco Bay Area?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Boston to San Francisco Bay Area, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Boston to San Francisco Bay Area, you should book around 3 weeks before departure, which saves you about 39% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low season

January

Cheapest flight

$136
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 10% increase in price.
Flight from Boston to San Jose

Flights from Boston to San Francisco Bay Area: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Boston to San Francisco Bay Area 
GeraldFlew with Delta-Mar 2025
Book a flight early in the morning. The plane & crew will have arrived the previous night
PaulaFlew with Alaska Airlines-Jul 2024
Get your boarding pass online and save it to your wallet App on the iPhone. Makes it so easy

FAQs - booking San Francisco Bay Area flights

  • How does KAYAK find such low prices on flights from Boston to San Francisco Bay Area?

    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 Boston to San Francisco Bay Area.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Boston to San Francisco Bay Area 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 Boston to San Francisco Bay Area?

    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 from Boston to San Francisco Bay Area with an airline and back with another airline.

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

    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 from Boston to San Francisco Bay Area up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to San Francisco Bay Area

  • Looking for a cheap flight? 25% of our users found tickets from Boston to the following destinations at these prices or less: San Francisco $234 one-way - $355 round-trip

Reviews of the top 5 airlines serving from Boston to San Francisco Bay Area

 
See real verified KAYAK customer reviews for airlines flying from Boston to San Francisco Bay Area. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to San Francisco Bay Area? 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
SouthwestOverall score based on 4218 reviews
8.1Boarding
8.0Comfort
7.0Food
8.6Crew
7.5Entertainment
Airline reviews

No wifi, seems to be very common with Southwest currently. Everything else was normal.

8.0 ExcellentSean, Jul 2026
Read more Southwest reviews

No wifi, seems to be very common with Southwest currently. Everything else was normal.

Poor customer service, no accommodation for passengers when the flight was delayed over 5 hours.

The flight was late. The crew was rude. There was no food. Cramped and uncomfortable. 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 first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

No gluten free snacks. Seats felt worn or bare bones even though it was a new 737 MAX 8.

Plane was clean and comfortable. Flight attendants and gate staff were professional, friendly and efficient. Boarding and deplaning were orderly and efficient. All in all, the typical excellent Southwest experience.

WiFi was not working and didn’t have a beverage service

Great flight. Outstanding Service. Southwest was able to put us on a direct flight to Denver when the connection could have been affected by a later arrival to Baltimore. The direct flight was less expensive that the flight with the connection in Baltimore.

Flights delayed by 4-6 hours. Boarding was a mess and unclear. Bags were not at arrival airport and had never even been put on the plane. No idea when I’ll get them. Don’t fly into Denver!

It was a good experience! Thank you:) No sparkling mineral water… 🥲

I don’t like it stuff not friendly and no one help for my mom she 82 years old lady I requested wheel chair but no one provided and no one help.

I loved that the checking in process was seamlessly easy and user friendly. The crew was very nice and professional. Unfortunately, we were seated in the back of the plane across from the bathroom. There wasn’t much room for leg room and comfortability. Alongside, we had to listen to a baby crying up and down the aisle way for the entire plane ride. The turbulence of the plane landing was rocky. Overall, the experience with Alaska was just okay. We made it home alive so that’s always a positive.

Although the plane was delayed , I appreciate the food credit.

Seat 6F was very good, but had loud engine noise

It was prompt. The only problem was that there are electric outlets at the seats, but they're on a slant, so my computer charger just fell out if I wasn't holding it. Flight attendants were fabulous.

It would be nice if these was tv😊not everyone has tablets ! But l had a very nice flight,way better then so many times. Thank you 👍

I was seated at the back of the plane and the flight attendants were fantastic. I did not get food so can’t say. Thought the movie selection was lean.

I think in 6:15 hrs flight the airlines should give some meal and not just couple of cookies People reach their homes at around 12 mid night and then they have to make dinner and eat I started my home at around 5 o clock and no food till 12 midnight You should give some reasonable meal in flight Thanks

Good flight. Pilot kept us well informed and attendants did a great job. Negatives:,1) little snack packs are far too expensice; 2) arrived early but waited 1/2 hr+ to get to our gate to deplane!

Although I know the Airlines cannot control the situation when there’s a ground stoppage, it would’ve been nicer if we would have had more up-to-date information clarity around the delays. Additionally, I think the delays also took a toll on the Cabin crew, particularly the lead flight attendant in first class. She was not very friendly when we boarded the plane for many of the passengers. Number one she refused to hang a garment bag in the front closet for a first class passenger, she was unwilling to dispose of an empty bottle in the trash as I was boarding (despite drinking a bottle of water herself and needing to disregard), and she was very combative with a passenger, who needed to access something from his bag that was Gate checked. Frankly, it was really unfortunate as I’ve never seen a flight attendant behave that way directly to the passengers, particularly when none of us had done anything wrong.

Flight from Savannah arrived very late and we did not take off till 2 hours after scheduled departure!

It is usually very pleasant. Good service for the price, international flights are even better

Flight attendant was very poor in taking care or showing attention. I slept up front for a few and missed the snacks. She saw me many times, went by me many times and never once asked if I needed anything. The whole 2 hours flight. And this is to a Diamond member in first.

I thought the service was very nice and pleasant. There were no hiccups and no issues so overall a good experience.

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

Seats are much much more comfortable than United, which is what I usually fly

Flight was 2.5 late. Maybe not United’s fault but late none the less. We were late as well on the first leg. WiFi quit working with an hour left.

I would have preferred a flight voucher and to hop on a different flight. Delayed over 6 hours.

Boarding was great, and the crew were very friendly. The seats must have been a bit on the older side and you could feel some of the seat components through the padding. Also, the plugs did not work on the row's entertainment screen or charging ports. Checked bag was transferred for connecting flight, and we appreciated how early we had the connecting gate information.

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

The flight was delayed, they didn’t even have water for the toilets or for drinks

It’s always a great time flying with united airlines.

Very old flight - time to retire it for newer airplanes

2+ hours delayed Outlet in row 12 did not work Tv monitors did not work Lights kept off the entire flight for at 5pm-7pm flight

Our original business class flight was cancelled so we not only downgraded but we were also spread out across the plane not sitting together in separate middle seats. My poor kids were scared and couldn’t see me on the flight and the crew wasn’t sensitive to the situation and what the airlines did to us. Very dissatisfied with United airlines.

The flight and crew were fine. The entertainment- the sound was so bad through the headphones I could barely understand it and it was a show I had seen before. The food might have been fine but having to have an account with united in order to access the app in order to pay for the food was rage inducing. I had entered my credit card info at home and logged in as guest but that wouldn’t allow the “wallet” tab to open in the app. And then the wifi was so bad that it took about 45 minutes to fully log in and get all the info working at which time I missed the food. You shouldn’t have to give your address, email and phone number in order to get a hamburger.

Flight delayed 4 times on a non-stop from BOS to SFO. Then when landed in SFO had to wait for 30 mins for a gate AT 3:30AM.

Whole experience was poor. Delayed 2 hours. Lied about the delays. Was all jet blues fault and tried to blame on air traffic control. Sent out other let trips and wouldn't allow people to switch aircraft.

It was fine for what it was. It’s not luxury travel but it was efficient, for the most part. Having my carry-on transferred into luggage however, was unwelcome.

I was seated next to an autistic child who was out of control and had a child behind me kicking my seat for most of the trip. I will never fly JetBlue again. Ever. I don't care how cheap it is. It's terrible.

Great price, easy check in, love the free drinks and snacks, and nice crew. The only negative part was waiting for your seat assignment 5 minutes before boarding, and the seats are a bit uncomfortable.

All airline travel outside of First or Business class is an ordeal to be endured. This trip was ok, small o, small k.

Flight emergency landed in Chicago due to “Odor” in back of plane . Had to buy ANOTHER TICKET to get to Boston cash out of my own pocket . Then they would notchange my return flight time without a 400. Charge!!!! Insulting.

we were an hour delayed after boarding and given no reason. Headsets cost money. Also there were openrows with no one setting in them but we were told we were not allowed to swtich.

Very pleasant flight attendants. Gate crew rather loud chatting with each other.

Service for food to our seat was a bit slow. Snack choices were just pretzels or baked chips. My seat cushion was not attached. Other than Barbie, video choice were not very good or current.

Everything you need to know for your flight to San Francisco Bay Area

Information on your arrival and departure airports