Cheap flights from Boston to San Francisco from £118

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SFO
13 Jun — 20 Jun1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Boston Logan Intl to San Francisco are usually found in January or September, booked 90 days in advance, depart on a Tuesday or Monday and return on a Thursday

Cheap flight deals from Boston to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from Boston to San Francisco
Explore the most affordable flight options available from Boston to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 May 2026.

Wed 19/807:35
BOS
-
SFO
Nonstop6h 34m
Delta
Tue 25/807:00
SFO
-
BOS
Nonstop5h 45m
Delta
Deal found 13/5£227
Wed 27/507:20
BOS
-
SFO
1 stop9h 44m
Alaska Airlines
Wed 27/516:44
SFO
-
BOS
1 stop10h 00m
Alaska Airlines
Deal found 11/5£230
Tue 2/608:05
BOS
-
SFO
1 stop11h 56m
Alaska Airlines
Tue 9/616:44
SFO
-
BOS
1 stop10h 00m
Alaska Airlines
Deal found 11/5£231
Thu 4/608:05
BOS
-
SFO
1 stop9h 56m
Alaska Airlines
Sat 6/606:16
SFO
-
BOS
1 stop20h 28m
Alaska Airlines
Deal found 12/5£234
Fri 3/707:20
BOS
-
SFO
Nonstop6h 39m
Delta
Tue 14/715:00
SFO
-
BOS
Nonstop5h 41m
Delta
Deal found 13/5£238
Sat 13/606:00
BOS
-
SFO
Nonstop6h 27m
United Airlines
Wed 17/608:10
SFO
-
BOS
Nonstop5h 54m
United Airlines
Deal found 14/5£240
Tue 8/908:30
BOS
-
SFO
1 stop10h 30m
Alaska Airlines
Thu 17/917:15
SFO
-
BOS
1 stop9h 34m
Alaska Airlines
Deal found 11/5£240
Wed 3/607:20
BOS
-
SFO
1 stop9h 44m
Alaska Airlines
Wed 3/616:44
SFO
-
BOS
1 stop10h 00m
Alaska Airlines
Deal found 12/5£241
Wed 3/605:45
BOS
-
SFO
1 stop8h 15m
Southwest
Wed 10/610:50
SFO
-
BOS
1 stop9h 15m
Southwest
Deal found 13/5£242
Tue 8/908:30
BOS
-
SFO
1 stop10h 30m
Alaska Airlines
Sun 20/917:20
SFO
-
BOS
1 stop9h 29m
Alaska Airlines
Deal found 13/5£244
Wed 27/516:48
BOS
-
SFO
1 stop19h 30m
Alaska Airlines
Mon 1/607:40
SFO
-
BOS
1 stop19h 40m
Alaska Airlines
Deal found 13/5£245
Wed 1/705:45
BOS
-
SFO
1 stop8h 34m
United Airlines
Tue 7/723:05
SFO
-
BOS
Nonstop5h 56m
United Airlines
Deal found 13/5£247

Find flight deals from Boston to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 14 May 2026.

Round-trip from

£227

One-way from

£118

Popular in

April

Cheapest in

January

Average price

£305

Good round-trip deal

£441 or less

Good one-way deal

£136 or less
United Airlines
  • United Airlines
  • 26/8-2/9
  • Nonstop
  • 12h 19m total
  • Boston to San Francisco
Alaska Airlines
  • Alaska Airlines
  • 27/5
  • 1 total stop
  • 9h 41m total
  • Boston to San Francisco
Highest demand for flights based on searches. 7% potential increase in price (£16 potential increase over avg. return price).
Cheapest flight prices on average. 1% potential price decrease (£4 potential savings vs. average return price).
Average for round-trip flights in May 2026
Price to beat on a round-trip flight from Boston Logan Intl to San Francisco.
Price to beat on a one-way flight from Boston Logan Intl to San Francisco.

Cheapflights Fare Finder

 
Customise your flight search to find flights from Boston to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 14 May 2026.
Use the filters below to find and compare flights from Boston to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 18/8

06:35-10:06

Nonstop6h 31m

San Francisco

Tue 25/8

22:17-07:00

Nonstop5h 43m

£227

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 1/6

21:15-00:57

Nonstop6h 42m

San Francisco

Tue 9/6

15:10-23:58

Nonstop5h 48m

£249

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 24/7

06:35-10:06

Nonstop6h 31m

San Francisco

Tue 28/7

22:17-07:00

Nonstop5h 43m

£261

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 2/6

19:07-22:49

Nonstop6h 42m

San Francisco

Tue 9/6

15:10-23:58

Nonstop5h 48m

£262

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 27/5

21:27-01:06

Nonstop6h 39m

San Francisco

Sat 30/5

15:10-23:58

Nonstop5h 48m

£274

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 15/7

16:25-22:30

1 stop9h 05m

San Francisco

Mon 20/7

18:10-08:00

2 stops10h 50m

£286

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 1/6

18:40-09:33

1 stop17h 53m

San Francisco

Tue 9/6

13:17-05:44

2 stops13h 27m

£288

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 3/10

07:00-10:57

Nonstop6h 57m

San Francisco

Sat 10/10

07:00-15:43

Nonstop5h 43m

£291

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 26/6

16:45-00:10

1 stop10h 25m

San Francisco

Fri 3/7

20:55-15:20

2 stops15h 25m

£308
Cheapest one-way

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 4/6

20:59-00:32

Nonstop6h 33m

£125

Flights are sorted by cheapest return flights first.

Deals found on 11/5

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Best time to book a flight from Boston to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Boston with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to San Francisco

How far ahead should I book a flight from Boston to San Francisco?

Booking 89 days in advance of your planned departure date is, on average, the best time to get cheap flights from Boston to San Francisco. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Boston to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Boston to San Francisco (average of £251). Flying from Boston to San Francisco in April is currently the most expensive (average of £338). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BOS to SFO?

Find hourly flight availability from Boston to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 14 May 2026.

A simple way to save on the total cost of your ticket is to fly from Boston to San Francisco in the evening. If you’re flexible enough to do this you can expect to save up to 52% on your trip compared to booking a flight at midday.

How much does it cost for a return flight from Boston to San Francisco?

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated 14 May 2026.
Get a feel of what it's like to fly with Delta and JetBlue from Boston to San Francisco by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.8

Food

7.2

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Entertainment

7.8

Food

7.2

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Entertainment

7.8

Food

7.2

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Boston to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airports do I use to fly from Boston to San Francisco?

    You will need to book a flight from Boston Logan Intl to San Francisco if you want to fly from Boston to San Francisco. At least 2 different airlines have flights from Logan Intl (BOS) to San Francisco (SFO) on a regular basis. There are 34 flights to San Francisco from the Boston airport per day. If you manage to book one that is nonstop, then you can expect the flight time from BOS to SFO to be around 6h 41m.

  • How popular is this Boston to San Francisco flight route?

  • How long is the flight from Boston to San Francisco?

    Departing from Boston to San Francisco will take you 6h 42m. Boston and San Francisco are separated by a distance of 2696 mi. All flights are typically direct.

  • What are the cheapest airlines flying from Boston to San Francisco round-trip?

    Flying on JetBlue is currently your cheapest option to San Francisco, with prices starting at £179. Another option worth looking into is Delta, starting at £294 return. You may be able to fly from Boston to San Francisco for 38% less than the average price by searching for these airlines.

  • What are the most reliable airlines from Boston to San Francisco?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Boston to San Francisco on time: United Airlines (87%), WestJet (87%), Air China (84%).

  • What are the cheapest flights from Boston to San Francisco?

    On average you can expect to pay £390 for a flight from Boston to San Francisco. The cheapest flight overall is £136 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at £201.

  • Can I find deals for flights from Boston to San Francisco that include hotel bookings?

    Yes. In addition to deals on Boston to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Boston to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to San Francisco.

  • Can I find deals for business class flights from Boston to San Francisco?

    Yes. Cheapflights offers flight deals from Boston to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to San Francisco?

    Currently, January is the cheapest month in which you can book a flight from Boston to San Francisco (average of £251). Flying from Boston to San Francisco in April is currently the most expensive (average of £338). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Newark
San Bruno
Bodega Bay
South San Francisco
Sunnyvale

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Alternative routes for Boston to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Boston to San Francisco

Discover the top 2 airlines that operate flights from Boston to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 14 May 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£179Average£390FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
DeltaCheapest£294Average£441FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Boston to San Francisco?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Boston to San Francisco. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Boston to San Francisco?

Cheapflights helps you find that perfect flight to San Francisco from Boston by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Boston to San Francisco with no change fees?

Yes! Cheapflights helps users easily find flights from Boston to San Francisco with no change fees.

Can Cheapflights notify me if prices for flights from Boston to San Francisco become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to San Francisco from Boston today and book when prices fit your budget.

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