Flights from Boston, MA to San Francisco, CA
Compare prices from 500+ airlines and find the best deals on flights from BOS to SJC.*Prices shown are estimated based on historical data.
Find the Best Fares
Check live availability for BOS to SJC now.
β‘ Check 500+ airlines instantly
About Flights from Boston, MA to San Francisco, CA
Looking for cheap flights from Boston, MA (BOS) to San Francisco, CA (SJC)? You've come to the right place. Fly2Any compares prices from over 500 airlines to help you find the best deals on this popular route.
Flight Information
Flights from BOS to SJC typically take around 13h 4m. The flight covers a distance of 6376 miles. Multiple airlines operate this route, including Japan Airlines, Spirit Airlines, KLM, American Airlines.
Best Time to Book
For the best prices on BOS to SJC flights, we recommend booking 2-3 months in advance. Prices tend to be lowest for mid-week departures (Tuesday and Wednesday). Use our Price Calendar feature to compare prices across different dates and find the cheapest options.
Airlines on This Route
Several major airlines serve the Boston, MA to San Francisco, CA route, including:
- Japan Airlines (JL)
- Spirit Airlines (NK)
- KLM (KL)
- American Airlines (AA)
Frequently Asked Questions - BOS to SJC Flights
How long is the flight from Boston, MA to San Francisco, CA?
Direct flights from Boston, MA (BOS) to San Francisco, CA (SJC) take approximately 13h 4m. Connecting flights may add 2-4 hours depending on layover location. For the fastest journey, look for nonstop flights which are typically available on this popular route.
When is the best time to book BOS to SJC flights?
For the best prices on BOS to SJC flights, book 6-8 weeks in advance for domestic routes or 2-4 months ahead for international travel. Domestic flights are typically 20-40% cheaper in off-peak months. Peak season months (July, August) have higher prices, while January and February typically offer the best deals.
What are the cheapest days to fly from Boston, MA to San Francisco, CA?
Tuesday and Wednesday departures are typically 15-25% cheaper than weekend flights on the BOS to SJC route. Saturday is usually the most expensive day to fly. For additional savings, consider red-eye flights or early morning departures, which often have lower fares and less crowded airports.
Which airlines fly from BOS to SJC?
Major carriers on this route include JetBlue, Delta, and other domestic and international airlines. Boston Logan has great public transit access via the Blue Line. JetBlue offers many affordable routes.
What should I know about flying from Boston, MA airport?
Boston Logan has great public transit access via the Blue Line. JetBlue offers many affordable routes. Book flights that depart mid-morning or early afternoon for the smoothest experience - these times typically have shorter security lines and fewer delays.
What is the cheapest month to fly from Boston, MA to San Francisco, CA?
The cheapest months to fly from BOS to SJC are typically January, February, September. Domestic flights are typically 20-40% cheaper in off-peak months. Avoid peak travel periods like July and August when prices can be 30-50% higher. Use Fly2Any's price alerts to get notified when fares drop.
What is the baggage allowance for BOS to SJC flights?
Baggage allowances vary by airline and fare class. Most full-service carriers include one checked bag (up to 50 lbs) on this route. Budget carriers may charge $25-$60 for checked bags. All airlines allow one personal item free. Compare total costs including baggage fees when booking to get the best deal.
Are there direct flights from Boston, MA to San Francisco, CA?
Yes, several airlines offer nonstop flights from BOS to SJC. Direct flights take approximately 13h 4m. If you're flexible with your schedule, connecting flights through major hubs like ATL or ORD may offer lower prices.

