Find Cheap Flights from Boston to San Francisco (BOS - SFO)

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Boston Logan International to San Francisco flight information

Avg. flight duration 6h 18m
Flights arrive in San Francisco
Flights depart from Boston Logan International
Flight price £227
Distance 2,697 miles
Airlines United Airlines, Alaska Airlines

Good to know

Low season:
February
Best time to beat the crowds
2%
expected price decrease
High season:
December
Most popular time to fly
3%
expected price increase
Average price:
£332
(avg. price over the last 2 weeks)
Good deal:
£277
or less (return)

When to Book Flights from Boston to San Francisco

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for finding a cheap flight

Looking for a cheap flight? 25% of our users found flights on this route for £276 or less.
The cheapest flight from Boston to San Francisco was found, on average, 75 days before departure.
Book at least 3 weeks before departure in order to get a below-average price.
Morning departure is around 17% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Boston to San Francisco Flights

How long does a flight from Boston to San Francisco take?
An average non-stop flight takes 6h 45m, covering a distance of 2697 miles.
How many flights are there between Boston and San Francisco?
There are 705 (non-stop) flights between Boston and San Francisco per week, averaging 104 per day.
Which airlines provide the cheapest flights from Boston to San Francisco?
In the past 3 days, the cheapest return tickets were found on United Airlines (£227) and Alaska Airlines (£262)
Which airlines fly most frequently between Boston and San Francisco?
JetBlue (13 times daily), United Airlines (12 times daily), Air New Zealand (11 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly from Boston to San Francisco?
For Boston to San Francisco, Wednesday is the cheapest day to fly on average and Friday is the most expensive. Flying from San Francisco back to Boston, the best deals are generally found on Tuesday, with Saturday being the most expensive.
Which airports will I be using when flying from Boston to San Francisco?
When flying out of Boston you will be using Boston Logan International, often referred to as Boston Airport. You will be landing at San Francisco, also known as San Francisco Airport.

Book cheap flights from Boston to San Francisco (return)

Airports
Origin
Boston
£227
only
£227
Destination
San Francisco
£227
only
£227
Wed, 10 Apr
BOS
Boston Logan International
SFO
San Francisco
8h 34m
Tue, 16 Apr
SFO
San Francisco
BOS
Boston Logan International
8h 19m
£227
Trip: 7 days
6.5GoodShow reviews
Overall 6.5 Good
Based on 154 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
BOS
SFO
Excellent 10.0

Pros: We were bumped up to economy plus where there are outlets available. Outlets are nice. The entertainment options were very good.

BOS
SFO
Good 6.4

Cons: the boarding process is horrible and feels rude. The design of the united gates is horrible, the long lines block others walking by. The lack of enough overhead space for carryon's is obnoxious. Overall very disappointing.

BOS
SFO
Good 6.0

Cons: It was quite late

BOS
SFO
Mediocre 3.6

Pros: Boarding was easy, staff were okay.

Cons: No entertainment, ran out of orange juice, cold and uncomfortable, old aircraft.

BOS
SFO
OK 5.3

Cons: WAs delayed for over 5 hours and missed my connecting flight. Had to abort takeoff go back to the gate and there were 2 issues with the plane

Thu, 2 May
BOS
Boston Logan International
SFO
San Francisco
6h 45m
Sun, 5 May
SFO
San Francisco
BOS
Boston Logan International
5h 45m
£262
Trip: 4 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 16 reviews
Overall
8.6
Boarding
8.6
Comfort
8.3
Crew
8.9
Entertainment
7.9
Food
7.9
BOS
SFO
Good 7.3

Cons: Our flight was delayed while we waited for a crew member to fly in to cover for a FA that called in sick. Gate agents didn’t provide many updates while we waited. The were only 3 snack items for purchase available on the plane. Seat didn’t recline

LAX
FLL
Mediocre 2.0

Pros: Nothing

Cons: The service

LAX
BWI
Excellent 10.0

Pros: Yes

Cons: I have flown Alaskan Airline that had movie screens. That would have been super since my flight wad 4 and half hours long

JNU
ANC
Excellent 10.0

Pros: Love 1st class. Comfrtable

ATL
SEA
Excellent 8.0

Pros: Crew was very nice.

Cons: Boarding was very hectic. This caused the plane to be delayed

Fri, 15 Mar
BOS
Boston Logan International
SFO
San Francisco
6h 55m
Sun, 24 Mar
SFO
San Francisco
BOS
Boston Logan International
5h 40m
£316
Trip: 10 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 16 reviews
Overall
8.6
Boarding
8.6
Comfort
8.3
Crew
8.9
Entertainment
7.9
Food
7.9
SAN
SJC
Mediocre 2.0

Pros: Nothing

Cons: The flight was delayed so long, I missed my wedding day and had to rent a car and drive Shane was horrible

SJC
KOA
OK 4.5

Cons: Flight 4 hours late.

SEA
LAS
Excellent 8.0

Cons: Tv’s, more drinks

LAX
PDX
Excellent 8.8

Pros: Seat and leg room very good.

ANC
SEA
OK 4.0

Pros: First class away with leg rest on first flight was very nice. Great gate agents in BRW, Anchorage and Omaha.

Cons: Flight was canceled, downgraded to coach on replacement flight, luggage was lost (still waiting), surly gate agent on CRT leg. No need to be so unpleasant.

Sat, 22 Jun
BOS
Boston Logan International
SFO
San Francisco
6h 50m
Mon, 1 Jul
SFO
San Francisco
BOS
Boston Logan International
6h 00m
£318
Trip: 10 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 16 reviews
Overall
8.6
Boarding
8.6
Comfort
8.3
Crew
8.9
Entertainment
7.9
Food
7.9
IAD
SFO
Excellent 10.0

Cons: More plentiful food selections? Everything served had dairy which I can’t do.

GDL
LAX
Good 6.6

Cons: Serve dinner in first class.

SFO
SLC
Good 6.3

Cons: My "window" seat was between windows, very uncomfortable to crane my neck over 90 degrees to see out. Should make that clear before I select it.

JFK
LAX
Excellent 9.6

Pros: Great premium class seats

Cons: Wish there were food options that didn’t include chocolate at every turn!

SEA
LAX
Excellent 8.4

Pros: The crew at Alaska is top tier! They are always the friendliest, on the phone or in person. I was stuck in the Seattle snow storm and they were so helpful with flight changes

Cons: There was no tv on the plane and no complimentary snack/drink

Fri, 15 Mar
BOS
Boston Logan International
SFO
San Francisco
6h 55m
Sun, 24 Mar
SFO
San Francisco
BOS
Boston Logan International
5h 40m
£333
Trip: 10 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 16 reviews
Overall
8.6
Boarding
8.6
Comfort
8.3
Crew
8.9
Entertainment
7.9
Food
7.9
JFK
PDX
Excellent 10.0

Pros: The crew was great. The flight was smooth. They ran out of breakfast sandwiches, which was disappointing, but everything else was stellar!

Cons: They could have stocked more food. They ran out of things.

BOS
SFO
Good 7.3

Cons: Our flight was delayed while we waited for a crew member to fly in to cover for a FA that called in sick. Gate agents didn’t provide many updates while we waited. The were only 3 snack items for purchase available on the plane. Seat didn’t recline

JFK
LAX
Excellent 9.6

Pros: Great premium class seats

Cons: Wish there were food options that didn’t include chocolate at every turn!

BOS
SFO
Excellent 8.0

Pros: Flight crew was wonderful.

Cons: They ran out of cups......

PHX
SEA
OK 4.0

Cons: Flight was very late

*
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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.