Cheap flights from Boston to San Francisco

from as little as £319

7 nights in San Francisco, departing Boston on 04 / Dec / 2024 with Alaska Airlines (price found 5 minutes ago)

Subject to availability, prices correct of the last 24 hours
San Francisco

Cheap return flights from Boston to San Francisco

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The Boston / San Francisco route

All 4344 km of it

Cheap flight deals for this route

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San Francisco flight facts

What you need to know

Alternative flights from the UK to San Francisco

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San Francisco

04 / Dec / 2024 is currently the lowest priced day of the year to fly the Boston/San Francisco route. There are around 30 flights on any given week from the UK to San Francisco and the cheapest month to fly right now is December.

Not suitable? Try running another search or viewing all cheap flight deals.

Min / Max Temperature (°C)
LOWEST

8 °C

AVG

14 °C

HIGHEST

21 °C

Rainfall (mm)
LOWEST

0 mm

AVG

44.8 mm

HIGHEST

112 mm

Key facts about San Francisco

How to get cheap flights from Boston to San Francisco

Tips and advice from our flight experts

We've compared all 30 flights that go to or via San Francisco every week, to find the best deal for you. Alaska Airlines usually has the cheapest flights from Boston to San Francisco, so keep an eye out for them in your search results. If they’re not the cheapest option, try searching by month to compare costs throughout the week.

When you fly 4344 km from Boston to San Francisco, you can choose from two airlines. Flights are most expensive during high season, and you can expect accommodation prices to be higher then too. Last-minute deals do crop up, but it's best to book in advance to avoid disappointment.

To sort cheap flights to San Francisco, it's best to start searching for flights by month, as this will show you when prices are at their lowest. Keep an eye on Alaska Airlines too, as they're the most popular airline for flying from Boston to San Francisco.

It takes about 6 hrs 55 mins to fly from Boston to San Francisco. Once you’ve chosen your flight, go through and fill out your details to complete your booking. If you haven’t yet sorted your hotel or car hire, take a look at our competitive rates – then you can book your flights and accommodation in one go.

Other popular destinations near San Francisco

Where other people are flying to

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