Cheap Flights from Boston to San Francisco from S$ 134

Frequently Asked Questions

• Which airlines offer the cheapest flights from Boston (BOS) to San Francisco (SFO)?

  Based on Trip.com data, Delta Air Lines offers one-way fares as low as S$ 134 on Cheapest nonstop routes (e.g. BOS to SFO on Tue, Feb 10), while American Airlines offers Cheapest nonstop round-trips from S$ 217 departing on Thu, Jan 22 and returning on Mon, Jan 26.

• Which airlines offer direct flights from Boston to San Francisco?

  At the moment, you can catch a direct flight from Boston to San Francisco with the following airlines, including: Jetblue Airways United Airlines Alaska Airlines Hawaiian Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long is a flight from Boston (BOS) to San Francisco (SFO)?

  It takes about 6 hours 47 minutes to fly from Boston (BOS) to San Francisco (SFO).

• When is the best time to book flights from Boston to San Francisco?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Boston to San Francisco is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from Boston to San Francisco?

  Based on Trip.com data in the past 4 weeks, there is 73 flight per week flying from Boston to San Francisco. You can check the weekly schedule for popular airlines on this route below: United Airlines: S/M/T/W/T/F/S -- UA1008 (08:14) Jetblue Airways: S/M/T/W/T/F/S -- B6133 (06:55)

• How can I find the best deals on flights from Boston to San Francisco?

  To find best deals on flights from Boston to San Francisco, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Feb 10, with one-way flights priced at just S$ 134.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Delta Air Lines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for San Francisco travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When is the best time to book a flight from Boston to San Francisco to get the best price?

  The cheapest months to fly from Boston to San Francisco is October, when demand for travel is lower.

• Which upcoming date is the cheapest for flights from Boston to San Francisco?

  After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Boston to San Francisco on December 16, 2025 with Alaska Airlines, with prices starting at S$ 120.

• Which airports can I fly through when travelling to San Francisco from Boston?

  You can land at any one of the following hubs in San Francisco, with Logan International Airport to San Francisco International Airport (BOS-SFO) is by far the most common option on this route: San Francisco International Airport (SFO).

• What is the time difference between Boston and San Francisco?

  The time difference between San Francisco and Boston is 3h.

• How can I change or cancel my flight ticket from Boston to San Francisco?

  Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.