Cheap Flights from Boston Logan International to San Francisco International

Compare Boston Logan International to San Francisco International flight deals

Find the cheapest month or even day of the year to fly to San Francisco International

Book the best San Francisco International fare with no extra fees

Flight deals from Boston Logan International to San Francisco International

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

San Francisco.R 1,993 per passenger.Departing Fri, 11 Jul.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Boston Logan International on Fri, 11 Jul, arriving in San Francisco International.Price includes taxes and charges.From R 1,993, select.

San Francisco.R 1,998 per passenger.Departing Fri, 1 Aug.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Boston Logan International on Fri, 1 Aug, arriving in San Francisco International.Price includes taxes and charges.From R 1,998, select.

San Francisco.R 1,998 per passenger.Departing Fri, 13 Jun.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Boston Logan International on Fri, 13 Jun, arriving in San Francisco International.Price includes taxes and charges.From R 1,998, select.

San Francisco.R 2,072 per passenger.Departing Wed, 4 Jun.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Boston Logan International on Wed, 4 Jun, arriving in San Francisco International.Price includes taxes and charges.From R 2,072, select.

San Francisco.R 2,107 per passenger.Departing Fri, 30 May.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Boston Logan International on Fri, 30 May, arriving in San Francisco International.Price includes taxes and charges.From R 2,107, select.

San Francisco.R 2,136 per passenger.Departing Tue, 2 Sep.One-way flight with United.Outbound direct flight with United departs from Boston Logan International on Tue, 2 Sep, arriving in San Francisco International.Price includes taxes and charges.From R 2,136, select.

San Francisco.R 2,136 per passenger.Departing Sat, 23 Aug.One-way flight with Delta.Outbound direct flight with Delta departs from Boston Logan International on Sat, 23 Aug, arriving in San Francisco International.Price includes taxes and charges.From R 2,136, select.

San Francisco.R 2,136 per passenger.Departing Wed, 8 Oct.One-way flight with Delta.Outbound direct flight with Delta departs from Boston Logan International on Wed, 8 Oct, arriving in San Francisco International.Price includes taxes and charges.From R 2,136, select.

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

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

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Direct flights from Boston Logan International to San Francisco International

Boston Logan International to San Francisco International: Alternative routes

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

Boston to San Francisco: Flight information

The things to know before you go.

Cheapest flight found	R 1,992
Cheapest month to fly	July
Average flight time	6 hrs, 44 mins
Most popular airline	United
Average flights per week	394

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

How much are return flights from Boston Logan International to San Francisco International?

The best price we found for a return flight from Boston Logan International to San Francisco International is R 4,270. 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.

How long does it take to fly from Boston Logan International to San Francisco International?

6 hours and 44 minutes is the average flight time from Boston Logan International to San Francisco International.

Which airlines fly direct from Boston Logan International to San Francisco International?

United, Hawaiian Airlines and Etihad Airways fly direct from Boston Logan International to San Francisco International.

How many flights are there a week from Boston Logan International to San Francisco International?

As of May 2025, there are 394 flights per week flying from Boston Logan International to San Francisco International.

When is the cheapest time to fly from Boston Logan International to San Francisco International?

The cheapest month to fly from Boston Logan International to San Francisco International is usually May 2025.

Which upcoming date is cheapest to fly from Boston Logan International Airport to San Francisco International Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Boston Logan International Airport to San Francisco International Airport on Wednesday, 1 October 2025.

Can I get a direct flight from Boston Logan International Airport to San Francisco International Airport?

Yes – the average flight time is 6 hours and 44 minutes.

How can I find the best flight deal to San Francisco International?

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 San Francisco 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.

When is the best time to book flights to San Francisco?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Francisco is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from Boston Logan International Airport to San Francisco International with?

Currently, Delta offers the cheapest flight tickets to San Francisco International.

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

The average time for a direct flight from Logan International Airport to San Francisco International Airport is 6 hours 45 minutes.
San Francisco is three hours behind Boston and is in the UTC-7 timezone.
You can choose from 116 weekly Logan International Airport to San Francisco International Airport flights. The 06:00 departure with JetBlue Airways is the earliest flight you can take. JetBlue Airways operates the last service of the day at 21:25.
Arriving two hours before an international flight and one hour ahead of a domestic departure are tried-and-true travel tips. Be at the airport with enough time to catch your BOS to SFO flight.
Flying during a peak month such as August? Major public holidays and other high seasons can lead to longer queues and delays at security. Play things extra safe and get there up to four hours ahead of an international flight and two hours before a domestic departure.
You can fly nonstop to San Francisco, United States. Prepare for takeoff with one of these carriers that operate direct flights from Logan International Airport to San Francisco International Airport:
The airline most travellers prefer to fly with on this route is Alaska Airlines.
United Airlines is the most punctual carrier operating BOS to SFO flights. An exceptional 82.07% of its departures on this route arrive as scheduled.
If you want to split up your journey, simply uncheck 'Direct flights only' when searching for your ticket from Logan International Airport to San Francisco International Airport. These are the top stopovers between BOS and SFO:
- Denver International Airport
- Detroit Metropolitan Wayne County Airport
- Minneapolis-St. Paul International Airport

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

The cheapest price we've seen for a one-way Logan International Airport to San Francisco International Airport flight is R 1,993. A return ticket right now is R 4,270. Depending on the availability and when you book, these fares may change.
To score cheap tickets from BOS to SFO, book your trip six months ahead of your departure.
Organise your trip for May. That's the cheapest month for flights from Logan International Airport to San Francisco International Airport. If you're flexible on when you fly, try out the 'Whole month' tool to find the cheapest price across each month.
Getting your hands on cheap flights from BOS to SFO is a breeze with Price Alerts. Simply set up one of these automatic alerts and we'll notify you when a lower fare pops up.
Select your ideal departure and arrival times, airlines and number of stops with the filters. Or sort your results by 'Cheapest' to get the best deals on flights from Logan International Airport to San Francisco International Airport.

Handy information about Logan International Airport (BOS)

You'll find BOS at One Harborside Drive.
When it comes to the on-time performance of Logan International Airport, 73.94% of flights stick to their scheduled arrival time.
Logan International Airport is around 5 kilometres from central Boston. If you're driving, catching a cab or ride-sharing from the centre, it'll take you 10 minutes or so to arrive, depending on the traffic.
Catching public transport? Expect a trip time of around 25 minutes.
Searching for a handy hotel close to BOS? If you're boarding an early flight from Logan International Airport to San Francisco International Airport, these stays will put you moments from check-in:

Arriving at San Francisco International Airport (SFO)

Reserve a hotel near SFO if you're on a late Logan International Airport to San Francisco International Airport flight. Settle into one of these accommodation options and skip the long transfer after landing:
Explore without limits with a San Francisco International Airport rental car. Book your wheels from Dollar, Thrifty or Hertz and discover more of San Francisco and beyond.
To get the lowest price, reserve your ride from San Francisco International Airport about one week before travelling.

Getting from San Francisco International Airport (SFO) to central San Francisco

San Francisco International Airport is roughly 21 kilometres from the centre of San Francisco. Driving there takes about 20 minutes.
If you're travelling on public transport, expect a journey time of roughly 45 minutes.

When to fly to San Francisco International Airport (SFO)

The quietest month for a flight from Logan International Airport to San Francisco International Airport is February, while August is the most popular. Choose the best time to visit San Francisco based on whether you prefer a bustling atmosphere or a more laid-back vibe.
Book your flight from Logan International Airport to San Francisco International Airport for September if you'd like to visit San Francisco during its warmest month. You can expect temperatures of between 12ºC (54ºF) and 22ºC (72ºF).
January has average temperatures of between 6ºC (43ºF) and 16ºC (61ºF). Search for cheap tickets from BOS to SFO sometime around then if you like cooler conditions.

Explore more of United States

San Francisco has plenty to offer, but there are so many other parts of United States you'll want to see. Around 64 kilometres south-east of San Francisco, a trip to San Jose will keep you on the go. Don't miss top attractions like Winchester Mystery House, Rosicrucian Egyptian Museum and San Jose Museum of Art.
Around 257 kilometres south-east of San Francisco, Fresno is another essential stop in United States. Experience major highlights starting with Forestiere Underground Gardens, Fresno Chaffee Zoo and Shinzen Japanese Garden.