$114 Find Cheap Flights from Boston to San Francisco Bay Area

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 3/3. 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

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco Bay Area

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to San Francisco Bay Area.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to San Francisco Bay Area.
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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 Francisco1 stop$217
San Jose
San Jose1 stop$251
San Francisco
San Francisco1 stop$217
San Jose
San Jose1 stop$251

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, Mar 2 - Mon, Mar 16
Frontier Logo
6:00 am - 9:39 pm
BOS
-
SFO
18h 39m
1 stop
Frontier Logo
10:38 pm - 11:41 am
SFO
-
BOS
10h 03m
1 stop
$217Frontier
Thu, Feb 19 - Wed, Feb 25
JetBlue Logo
8:33 pm - 12:25 am
BOS
-
SFO
6h 52mnonstop
JetBlue Logo
8:20 am - 4:59 pm
SFO
-
BOS
5h 39mnonstop
$218JetBlue
Wed, Apr 22 - Tue, Apr 28
Multiple Airlines Logo
8:19 pm - 11:59 pm
BOS
-
SFO
6h 40mnonstop
Multiple Airlines Logo
10:38 pm - 12:05 pm
SFO
-
BOS
10h 27m
1 stop
$219Multiple Airlines
Wed, Feb 25 - Wed, Mar 4
Alaska Airlines Logo
7:00 am - 1:42 pm
BOS
-
SJC
9h 42m
1 stop
Alaska Airlines Logo
10:16 am - 11:59 pm
SJC
-
BOS
10h 43m
1 stop
$251Alaska Airlines
Tue, Mar 3 - Tue, Mar 10
Alaska Airlines Logo
9:02 am - 5:09 pm
BOS
-
SJC
11h 07m
1 stop
Alaska Airlines Logo
2:36 pm - 6:54 am
SJC
-
BOS
13h 18m
1 stop
$254Alaska Airlines
Tue, Feb 24 - Wed, Mar 4
Delta Logo
7:15 am - 1:37 pm
BOS
-
SJC
9h 22m
1 stop
Delta Logo
6:20 am - 7:15 pm
SJC
-
BOS
9h 55m
1 stop
$257Delta
Tue, Mar 3 - Tue, Mar 10
United Airlines Logo
10:30 am - 9:05 pm
BOS
-
SJC
13h 35m
2 stops
United Airlines Logo
10:55 pm - 10:49 am
SJC
-
BOS
8h 54m
1 stop
$259United Airlines
Wed, Mar 11 - Tue, Mar 17
American Airlines Logo
2:36 pm - 9:21 pm
BOS
-
SJC
9h 45m
1 stop
American Airlines Logo
6:00 am - 7:16 pm
SJC
-
BOS
10h 16m
2 stops
$262American Airlines
Tue, Mar 3 - Tue, Mar 10
United Airlines Logo
9:40 am - 9:05 pm
BOS
-
SJC
14h 25m
2 stops
United Airlines Logo
10:55 pm - 11:10 am
SJC
-
BOS
9h 15m
2 stops
$264United Airlines
Tue, Feb 24 - Thu, Mar 5
Delta Logo
7:15 am - 1:37 pm
BOS
-
SJC
9h 22m
1 stop
Delta Logo
9:15 am - 9:23 pm
SJC
-
BOS
9h 08m
1 stop
$277Delta
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 72 hours was to San Francisco, at $179 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 72 hours was $179.

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 $424, 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 March, when tickets cost $332 (return) on average. On the other hand, the most expensive months are December and August, when the average cost of round-trip tickets is $435 and $388 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 4 weeks before departure, which saves you about 42% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$114
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from Boston to San Francisco

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
BOS
-
SFO
Mar 2025
Book a flight early in the morning. The plane & crew will have arrived the previous night
PaulaFlew with Alaska Airlines
BOS
-
SFO
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.

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

    The cheapest time of day to fly to San Francisco Bay Area is generally at night, when round-trip flights cost $334 on average. Morning departures are around 7% cheaper than evening flights, on average. The most expensive time of day to fly to San Francisco Bay Area is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $492.

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 $153 one-way - $286 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
Alaska AirlinesOverall score based on 11834 reviews
7.1Food
8.1Boarding
7.8Comfort
8.5Crew
7.0Entertainment
Airline reviews

Flight cancelled and deplaned. Rescheduled 8 hours later at a different airport. Ended up at destination but late.

6.0 GoodAnonymous, Feb 2026
DCA - SAN
Read more Alaska Airlines reviews

Flight cancelled and deplaned. Rescheduled 8 hours later at a different airport. Ended up at destination but late.

Alaska used to be a top notch airline. With it's growth it is now in line with the big airlines. Not bad, not great.

Due to plane delays on both legs of my flight home, I had to be rerouted from Santa Rosa to Las Vegas on Skywest and then to DCA on American. SkyWest airlines sat on runway in Las Vegas for 20 minutes waiting for gate to clear. My boarding pass for American that I was given by Alaska was incomplete and the Las Vegas airport lacked signage and departure boards. I barely made my flight bc it was so confusing. American Airlines has a much better wireless connection. I’ll never fly Alaska again. It clearly has problems.

Great. I did have a little issue getting into the Lounge, which is likely more an American Airlines issue. I did not carry my physical AAdvantage Executive credit card with me on this trip, which Admirals Club membership is a part of the benefits of having this card. The instructions on the AA website and the Citi cards website make it seem like you don't need the physical card, as both sites state you can enter with your boarding pass and driver's license. But both lounges said you were required to present the physical card (and not the digital version, via Apple Pay), as only the physical card says "Admirals Club" on the back.I also do not have a physical Admirals Club membership card, so while both lounges eventually let me in, both denied me entrance initially for this reason.

I paid for wifi and it never worked... it was miserable. I couldn't access my shared files to work on the plane, it didn't work on my phone. I paid for nothing but frustration and continual refreshing, hoping it would work

We left about 30 minutes late due to ramp issues. It did not impact me, but I know others on the flight had very tight connections to Maui.

Everything from the time I booked my flight through to the end when I got home was smooth and wonderful. Service was great, the flight attendants were attentive and there were no outstanding delays.

Delayed and no entertainment? I also forgot my headphones and immediately reported it and have not heard back yet.

The crew was very friendly. Boarding was quick and efficient.

Again, very smooth and all of the Alaska folks were great. They continue to meet all my needs.

I was given middle seat on this flight and prior Boston to Seoul flight That is a problem for long flights, Kayak system did not give me a change to select my seats and assigned me middle seats regardless of my elevated status in Delta. This needs immediate attention.

Inexperienced boarding crew allowed too many bags on to a full flight and delayed takeoff causing a missed connection and unplanned overnight stay. There was a hotel at the airport but Delta would not pay for it offering only to shuttle me to an area hotel. Never even offerred so much as an apology by anyone working for Delta.

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

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.

Did not realize internet screen was hidden between seats and no info printed!!!!

I noticed that the planes seem to be outdated. There was no entertainment per se. Also, the waiting area did not have any working electrical outlets

Service in business class was not impressive. I ordered coffee with dinner and then watched other people get 2 refills before I got my 1 cup of coffee, and only after I pressed the attendant button overhead. Furthermore, the seats in the forward cabin need maintenance on this 737-800: the upholstery is detaching from the seat frame, at least on the backs of seats 1C, 1D.

Our flight attendant in FIRST CLASS was one of the worst I’ve ever had. She was not at all pleasant, nor particularly good at her service.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

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 .

the whole trip was smooth, and as comfortable as flying is these days. flight crew was friendly and very courteous and helpful.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Flight was late - I was downgraded from first class to coach

They brought an empty plane to the gate. Then a flight delay was announced for maintenance and waiting on a part. I was then put on a flight to San Francisco instead with a connecting flight to my final destination. Arrived at my final destination 2 hours late.

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Enough space,crew was helpful,food was good.The gates are way far especially for travelers with health issues

Amazing I love American. I’ll never fly anyone else if I can help it.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

After the door had been closed, the cockpit makes an announcement that catering is running late and it is not the airline's fault. It is their fault in the sense that we had to sit for 2 hours or more when we could have stayed in the terminal. Poor communications between catering and airline. This caused a young man to lose his temper and he went storming out hitting objects. He had complained to the gate agent that he had already waited at the gate 7 hours and when can the airplane leave? Airilnes do a poor job of explaining delays, maintenance issues, etc. whereas being truthful may gain more sympathy or understanding.

I got sick nothing contagious but distressing enough and the care I received on the flight was astounding.

We were told the flight was delayed 5 times, then it was moved to the next day.

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

Loved the crew . Absolutely no complaints. Except for luggage lost

Wish some foods provided rather than just biscuit/cookie for flight more than 2 hours

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

Because of weather and mechanical issues our flight was 4 hours late. The only compensation offered to us was a meal voucher to be used only at Boston Airport and only on the day issued. But by the time it was offered to us all the restaurants were closed, so there was no way to use that offer.

Friendly crew, efficient boarding and flight arrived early. Couldn’t ask for a better experience

Terrible. They canceled our early morning flight after midnight on the day of and had no available flights to rebook my family on for the next 72 hours. Yet they still had other flights that were not cancelled from JFK so it couldn’t be based on the weather. It felt like they canceled the flight based on it not being profitable enough for them. I am not interested in traveling with the again. The absolute worse customer service and lack of accountability.

Horribly rude check in at airport, worst in 25 years of flying. All over a simple issue they could have googled to resolve.

First time flying with JetBlue and never again. I went to the counter to request meet and assist because I'm 74 and my wife is 79. I walk with a cane and my wife is handicapped and has her own wheel chair. I told the agent that my wife and luggage was at the entrance door. The ticketing agent said to me that they don't offer meet and assist. I need to bring them our luggage and then go back and get my wife in order to get my boarding pass. As I went back to get my luggage a Southwest agent along with a TSA agent recognized the situation and came over and took my wife and luggage to the JetBlue ticketing counter alongside the line and told the JetBlue agent to issue to take our luggage as soon as they could.

1) No pilot available for 1 hour 2) no room for most passengers careyon in overhead—-> stowed below 3) when we landed we had to wait 45 min. Before docking at gate as gate was not ready

It was good. I prefer JB over other airlines.I just wish we had headphones for the films, but other than that - good.

The ride share experience in JFK is terrible. After traveling on a flight, then you need to take a subway to the last stop to get an uber or lyft. Unacceptable. Bad job JetBlue for permitting JFK and Port Authority to do this to your passengers.

Checking In on JetBlue site was impossible. It hung up on REAL ID. Even my Global Entry did not help. Luckily, on Kayak site it was a breeze. Entire flight the temperature was COLD! Otherwise the crew was great!

The flight was two hours late due to a computer fault and resulting maintenance. Nothing was offered as compensation beyond bottles of water during the time we were deplaned and waiting in the terminal.

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

Information on your arrival and departure airports