The cheapest times to fly from BOS to SFO are
- January 1st to March 4th (except the week of February 12th)
- May 28th to June 10th
- August 20th to November 18th
based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from BOS to SFO is early to mid September. Prices can be as high as $825 for Sunday flights during early August, or as low as $237 for Tuesday flights around early to mid September.
When to Fly to San Francisco
Flying from Boston, MA (BOS) to San Francisco, CA (SFO) will usually cost between $237 to $459 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid September with an average ticket price of $239. Due to high demand the most expensive time to fly is early August, with an average price of $507. Planning your trip to low-cost times can easily save you $267 on economy flights and even more on first-class flights. Generally, any price below $288 can be considered a good price for a round-trip BOS to SFO flight.
See below for a graph of average weekly prices for the BOS to SFO route. All prices are for round-trip tickets in USD.
Compared to other flights, the BOS to SFO flight is much cheaper than the average and costs much less than the average flight leaving from Boston. The average price per mile (for a direct flight) is $0.07, which is far below average.
Flight Prices by Day of the Week
Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $85 (23%) on this flight.
Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $278. Return trip prices are from the SFO to BOS flight, and often highlight the quality of our data in showing the same trend.
Departing Prices by Day
Return Trip Prices by Day
Nonstop Flights and Layovers
Travelers looking to fly from BOS to SFO can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 5 hour 50 minutes may be realistic.
Flight Questions Answered
Still have questions about flying from BOS to SFO? We’ve got answers.
Which airlines fly this route?
You can find 15 major airlines flying this route most often: Alaska, American, China Eastern, Delta, Emirates, Fiji Airways, Frontier, Hawaiian, JetBlue, Qantas, Qatar Airways, Singapore Airlines, Southwest, Sun Country Airlines, United, and potentially more during busy seasons.
How far away is it from San Francisco International Airport to Logan International Airport?
The distance between the two airports is roughly 2697 miles or 4340 kilometers.
How long does it take to fly from BOS to SFO?
The real-world flight time for a nonstop BOS to SFO flight is about 5 hour 50 minutes.
How many flights go between Boston, MA and San Francisco, CA?
It depends on the day of the week and the date, but a typical day might have around 86 available flights from BOS to SFO.
Airport Location Info
|Origination airport name||Logan International Airport|
|Country||the United States|
|Destination airport name||San Francisco International Airport|
|City||San Francisco, CA|
|Country||the United States|
Late and Early Flight Data
Flights from BOS to SFO tend to depart later than the average flight. According to our recently updated data, 32% of flights departed 5 or more minutes late, and 25% of flights left 5 or more minutes early. On average you can expect to leave SFO heading for BOS about 19 minutes late. This does significantly impact arrival time, as the average landing time in San Francisco, CA is about 7 minutes late. The numbers below show a recent average of take-off times versus the scheduled departure flight:
- Delta: 35 minutes late
- United: 15 minutes late
- JetBlue: 15 minutes late
- Alaska: 26 minutes late
- Some airlines not reporting
Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.