£128 Cheap United flights from Boston to San Francisco (BOS→SFO)

View £128 flight on Tue, 7 Apr 2026Opens in a new window

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United flights from Boston to San Francisco (BOS→SFO)

Prices were available within the past 7 days and start at £128 for one-way flights and £260 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, 24 Feb - Tue, 3 Mar
BOS
Boston
SFO
San Francisco
£260 Return, found 1 day ago
£260
Return
found 1 day ago
Select United flight, departing Tue, 24 Feb from Boston to San Francisco, returning Tue, 3 Mar, priced at £260 found 1 day ago

Alternative airports near San Francisco

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to San Francisco Intl. SFO. Cheapest and Closest option available. Average driving time to city centre is 19 minutes. Flights from £190
SFO
San Francisco Intl.
CheapestClosest
Average driving time to city centre19 min
Flights from £190

Find the cheapest month to fly from Boston (BOS) to San Francisco (SFO)

May is typically the cheapest month to fly

From £122 - £227 per traveller.
Flight from Boston to San Francisco route information
Origin airport
Logan Intl.
Destination airport
San Francisco Intl.
Airlines serving
Alaska Airlines, Hawaiian Airlines, JetBlue Airways
Popular airline
Alaska Airlines
Distance
4315 km
Average flight time
3 hours 55 mins

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Frequently asked questions

How much is a United Airlines flight from Logan Intl. Airport (BOS) to San Francisco Intl. Airport (SFO)?
Landing cheap one-way United Airlines flights from BOS to SFO from £128 on Expedia is a breeze — just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly round-trip fares from £260 for your next exciting getaway.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from BOS to SFO with United Airlines?
Look for return or one-way flights to San Francisco in February or April. You could find cheaper fares with United Airlines during these off-season months.
Does United Airlines fly nonstop from Logan Intl. Airport (BOS) to San Francisco Intl. Airport (SFO)?
Yes, you can travel from Logan Intl. Airport (BOS) to San Francisco Intl. Airport (SFO) on one of United Airlines's 28 weekly direct flights. Make use of our "Nonstop" and "Airline" filters to find the United Airlines flight that'll arrive at SFO at your preferred time.
How long does it take to fly from BOS to SFO with United Airlines?
Take off from Logan Intl. Airport (BOS) for San Francisco Intl. Airport (SFO) on a direct United Airlines flight, and you'll be in the sky for around 6h 51m.
Which day of the week has the most United Airlines flights from Logan Intl. Airport (BOS) to San Francisco Intl. Airport (SFO)?
United Airlines operates the most flights from Logan Intl. Airport (BOS) to San Francisco Intl. Airport (SFO) on Thursday. With up to 4 daily departures, you'll get the most options and flexibility on this day.
What airports does United Airlines fly into in San Francisco?
Get on a United Airlines flight from Logan Intl. Airport (BOS) to San Francisco, and you'll probably land at San Francisco Intl. Airport (SFO). This is the airline's main hub in this destination.
What type of plane does United Airlines fly from Logan Intl. Airport (BOS) to San Francisco Intl. Airport (SFO)?
You'll likely be on a Boeing 757-200 or a Boeing 737 MAX 9 when flying United Airlines from Logan Intl. Airport (BOS) to San Francisco Intl. Airport (SFO). However, keep in mind that a different plane may be used due to operational factors.
Can I change or cancel my United Airlines flight from Logan Intl. Airport (BOS) to San Francisco Intl. Airport (SFO)?
Changes are generally free within 24 hours of making your booking, but your airline may charge you after that. For further information about altering your flights, go to your "Trips," select your flight and click on "Manage Booking." If you want the freedom to change your plans without being charged, apply the "Changes included" and "No cancel fee" filters when planning your next adventure.

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