£121 Find Cheap Flights from San Francisco to Boston – Compare and Save

If your flying dates are flexible, you should consider flying to Boston on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Wednesday is the most expensive day to fly from San Francisco to Boston. For your return ticket, we recommend flying on a Friday and avoiding Wednesdays for the best deals.

The cheapest month for flights from San Francisco to Boston is January, where tickets cost £247 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £370 and £361 respectively.

No, with an average price for the route of £258, prices are generally cheapest when you fly direct.

To get a below average price on the flight from San Francisco to Boston, you should book around 3 weeks before departure, which saves you about 33% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

In the past 5 days, the cheapest return tickets from San Francisco to Boston were found on Delta (£234) and JetBlue (£235).

San Francisco and Boston are connected by different airlines. The airlines that fly that route the most regularly are United Airlines (43 flights per week), JetBlue (34 flights per week), and Delta (25 flights per week).

Weekly flights between San Francisco and Boston historically see delays in approximately 19% of cases, with the average delay over the past year being 176 minutes.

Typically, flights leaving in the evening tend to face fewer delays, whereas flights in the early afternoon have historically encountered delays more often.

Statistically, Saturday is the day of the week with the fewest delays on this flight route, while Thursday has typically experienced more delays than other days.

Based on our data, United Airlines have experienced the fewest delays on this route in the past 12 months, with only about 18% of their flights encountering any delays.

There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Each day, there are between 12 and 16 direct flights that take off from San Francisco and land in Boston, with an average flight time of 5h 52m. The most common departure time is 21:00 and most flights take off in the morning. Each week, there are 102 flights. The most frequent day of departure is Thursday, when 16% of all weekly flights depart. The fewest flights depart on a Saturday.