Cheap flights from San Francisco International to Boston Logan International

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Flight deals from San Francisco International to Boston Logan International

Looking for a cheap last-minute deal or the best round-trip flight from San Francisco International to Boston Logan International? Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from San Francisco International to Boston Logan International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Francisco International to Boston Logan International flights are currently cheapest in June.

Direct flights from San Francisco International to Boston Logan International

San Francisco International to Boston Logan International: Alternative routes

Compare routes from San Francisco International to Boston below. You may find an airport to fly into that's cheaper, faster, or easier than Boston Logan International.

San Francisco to Boston: Flight information

The things to know before you go.
Cheapest flight found$232
Cheapest month to flyMay
Average flight time5 hrs, 45 mins
Most popular airlineWestJet
Average flights per week380

Finding cheap flights from San Francisco International to Boston Logan International: Frequently asked questions

The best price we found for a round-trip flight from San Francisco International to Boston Logan International is $232. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
5 hours and 45 minutes is the average flight time from San Francisco International to Boston Logan International.
WestJet, United and Hawaiian Airlines fly direct from San Francisco International to Boston Logan International.
There are 380 flights per week flying from San Francisco International to Boston Logan International, as of May 2025.
The cheapest month to fly from San Francisco International to Boston Logan International is usually May 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Francisco International Airport to Boston Logan International Airport on Saturday, May 17, 2025.
Yes – the average flight time is 5 hours and 45 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Boston Logan International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Boston is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines and Delta offer the cheapest flight tickets to Boston Logan International.

Flying from San Francisco International Airport (SFO) to Logan International Airport (BOS): what you need to know

  • The average duration of a direct flight from San Francisco International Airport to Logan International Airport is 5 hours 40 minutes.

  • The timezone in Boston is UTC-4, which is three hours ahead of San Francisco.

  • Flights from SFO to BOS start from 06:00 — the earliest with JetBlue Airways. The last service of the day is at 23:59 with JetBlue Airways. Overall, you can take your pick of 114 weekly San Francisco International Airport to Logan International Airport flights.

  • Arrive at the airport on time so you don't miss your SFO to BOS flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid the stress of rushing.

  • You can expect longer queues in popular months such as August. Arriving up to four hours ahead of an international flight and two hours for a domestic departure will help ensure a smooth travel experience.

  • You can travel nonstop to Boston, United States. Take off with one of these airlines that offer direct flights from San Francisco International Airport to Logan International Airport:

  • The majority of passengers choose to fly with Alaska Airlines on this route.

  • With a dependable 93.62% of services arriving on schedule, Alaska Airlines is the most punctual carrier operating SFO to BOS flights.

  • We make it simple to book a flight with a stopover. To see your options for tickets from San Francisco International Airport to Logan International Airport, uncheck 'Direct flights only.' Then, choose a flight that has a stop long enough to tour the city of your choice. Some great stopovers between SFO and BOS include:

    • Denver International Airport

    • Detroit Metropolitan Wayne County Airport

    • Lambert-St. Louis International Airport

How to find the cheapest flights from San Francisco International Airport (SFO) to Logan International Airport (BOS)

  • $116 is the best price for a one-way San Francisco International Airport to Logan International Airport flight. A return flight starts at $232. These prices may change depending on availability and demand.

  • Get cheap tickets from SFO to BOS by booking at least six months ahead. According to our research, that's the sweet spot for picking up a bargain.

  • May is the cheapest month for flights from San Francisco International Airport to Logan International Airport. If you need to fly at a different time of year, the 'Whole month' tool will give you the lowest airfares across every month.

  • You don't need to check every day to see if fares have dropped when you create a Price Alert. We'll update you the moment a special offer becomes available on cheap flights from SFO to BOS.

  • Discover the right flight for you by using the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from San Francisco International Airport to Logan International Airport, use the 'Sort by' function. You can also filter by departure and arrival times, airline, and number of stops.

Handy information about San Francisco International Airport (SFO)

  • Of all flights leaving San Francisco International Airport, 77.36% arrive on time at their destination.

  • Central San Francisco to San Francisco International Airport is approximately 21 kilometers. Depending on traffic, it'll take you about 20 minutes to get there if you're catching a cab, ride-sharing or driving.

  • Planning to catch public transport? You can expect a journey time of around 45 minutes.

  • Catching an early flight from San Francisco International Airport to Logan International Airport? Avoid the stress of rushing to the terminal (and enjoy a little extra shut-eye) by choosing one of these hotels near SFO:

Arriving at Logan International Airport (BOS)

Getting from Logan International Airport (BOS) to central Boston

  • BOS is located at One Harborside Drive.

  • Logan International Airport is roughly 5 kilometers from the center of Boston. The drive time takes about 10 minutes.

  • Getting to the center on public transport takes about 25 minutes.

When to fly to Logan International Airport (BOS)

  • The quietest month for a flight from San Francisco International Airport to Logan International Airport is May, while August is the most popular. Pick the ideal time to visit Boston based on whether you prefer a laid-back vibe or a more bustling atmosphere.

  • Lock in your flight from San Francisco International Airport to Logan International Airport for July if you want to explore Boston during its warmest month. You can expect temperatures of between 16ºC (61ºF) and 29ºC (84ºF).

  • Search for cheap tickets from SFO to BOS in January if you like traveling in cooler conditions. Temperatures are at their lowest then, ranging between -8ºC (18ºF) and 6ºC (43ºF) on average.

Explore more of United States

  • New York is just one of the many cities in United States waiting to be discovered once you've seen the sights of Boston. Around 306 kilometers away to the south-west, top sights here include Statue of Liberty, Central Park and Empire State Building.

  • Around 434 kilometers south-west of Boston, Philadelphia is another essential stop in United States. Get a taste of what this destination has to offer at Liberty Bell, Independence Hall and Philadelphia Museum of Art.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.