$129 Cheap American Airlines flights San Francisco (SFO) to Boston (BOS)

Finding cheap one-way American Airlines flights from SFO to BOS from $129 on Expedia is simple — just filter by “Price (lowest to highest).” Or check out our budget-friendly return fares from $249 for your next exciting vacation.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

January is one of the cheapest months to fly to Boston with American Airlines. You could also find great prices on return and one-way fares in February.

Begin your search one to three months ahead of your travel date to score cheap fares on American Airlines flights from San Francisco Intl. Airport (SFO) to Logan Intl. Airport (BOS). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Nail your timing, and you can enjoy significant savings on domestic flights.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Use the “Nonstop” filter when browsing for direct American Airlines flights from SFO to BOS. It’s also a great way to compare other airlines servicing the same nonstop trip.

Sort your results by “Early Morning” and “Morning” to see the earliest flights from SFO to BOS. Leaving early means you’re 20% less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Board an American Airlines flight from San Francisco Intl. Airport (SFO) to Boston, and you’ll likely land at Logan Intl. Airport (BOS). This is the airline’s main hub in this destination.

Changes are often free within 24 hours of making a booking, but your airline may charge a fee after that time. For further details about modifying your flights, check out your “Trips,” select your flight and click on “Manage Booking.” If you want the freedom to update your itinerary without extra charges, check the “Changes included” and “No cancel fee” filters when organizing your next escape.