£138 Find Cheap Flights from San Francisco to Boston – Compare and Save

These are the earliest and latest flight times available from San Francisco to Boston:

• Earliest: departs at 06:00 and lands at 11:39
• Latest: departs at 23:45 and lands at 05:24.

The flight takes about 5h 39m.

Only Economy class is available on flights from San Francisco to Boston.

A direct flight from San Francisco to Boston takes 5h 39m, covering 2,696 miles.

No, a passport is not required for this domestic route, but you will need another form of identification, such as a driving licence.

Return flights from San Francisco to Boston range from £265 to £439, with an average of £340 over the past 12 months. Anything below £265 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 34% above the £340 route average. Book 11 weeks before departure for the lowest fares.

On this route, stopover flights are cheaper than direct options on average. Stopover fares average £236 return via Atlanta Hartsfield-Jackson (ATL), compared with £343 for direct.

Alaska Airlines is slightly above the route average for timely arrivals, while United Airlines has a lower on-time arrival rate. On-time arrival rates on San Francisco to Boston flights are:

• Alaska Airlines: 85% on time
• United Airlines: 82% on time
• Delta: 80% on time

On average, flights on this route are punctual 80% of the time.

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge £26–£75 for the first checked bag in Economy. Premium fares and elite status bookings typically include a free checked bag.

The Airbus A318/A319/A320/A321 family is used most often on this route, operated mainly by JetBlue. Other aircraft seen on the route include Airbus A321neo variants.

Morning is the busiest departure period on San Francisco to Boston flights, with 39% leaving in that window. Afternoon departures account for 38%, Night flights for 23%, and Evening flights for 0%.

Yes. Based on fares seen in the past 5 days, return flight prices on this route showed a wide range, from about £251 to £1,414. That means the highest observed fare was about 6x higher than the lowest one.

Two airlines offer in-flight Wi-Fi on San Francisco to Boston flights:

• JetBlue
• Delta

Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty programme, while others are paid add-ons priced by flight length.

One-way fares from San Francisco to Boston are currently lower than usual. Average one-way flight prices are about £138, which is 34% below the typical average for this route.

Boston Logan Intl Airport (BOS) hosts 5 major car hire companies, with daily rates starting from around £17 for economy cars. Top options include:

• Dollar
• Hertz
• Budget
• Thrifty
• Sixt

Flights from San Francisco to Boston usually depart from San Francisco (SFO) and arrive at Boston Logan Intl (BOS).

Evening flights have the fewest delays on this route, while afternoon departures tend to have the most.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the San Francisco to Boston route, 20% of flights were delayed in the past three months, with delays averaging 2h 53m.

One-stop flights from San Francisco to Boston most commonly connect through:

• Atlanta Hartsfield-Jackson (ATL) – 27% of one-stop connections
• Philadelphia (PHL) – 23% of one-stop connections
• San Diego (SAN) – 10% of one-stop connections
• New York John F Kennedy Intl (JFK) – 5% of one-stop connections

Yes. Flexible dates can save you up to 19% on flights from San Francisco to Boston. Wednesday is the cheapest departure day at £300 return on average, while Sunday is the most expensive at £368, a difference of £68.

KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

3 airlines operate flights between San Francisco and Boston. The airlines offering direct flights on this route include:

• JetBlue
• United Airlines
• Delta

Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time of 8h 05m, compared to 8h 24m via Phoenix Sky Harbor Intl (PHX) and 8h 30m via Philadelphia (PHL).

Boston is 3 hours ahead of San Francisco (Eastern Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in Boston are Boston Common, Copley Square, and John B. Hynes Veterans Memorial Convention Center. These are among the most viewed places in Boston on KAYAK.

Among airlines operating San Francisco to Boston flights:

• JetBlue: offers extra legroom; offers free seat selection
• United Airlines: offers extra legroom; offers free seat selection
• Delta: offers extra legroom; offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Here are some options for this route, based on selected ticket types and cabin classes:

• JetBlue: a cabin bag and a checked bag in Economy class
• United Airlines: a cabin bag and a checked bag in Economy class
• Delta: a cabin bag and a checked bag in Economy class

Baggage allowance can vary by ticket type, cabin class, route, and airline, so always check the fare details before booking.