Flights San Francisco → Boston — September 10, 2026

One way · Economy · 1 adult · price per person

The cheapest itinerary observed for Thursday, September 10, 2026 on the San Francisco–Boston route: 1 stop itinerary (2 flights) via Atlanta Hartsfield-Jackson (ATL), from San Francisco International (SFO) to Boston Logan (BOS), first flight Frontier Airlines F91448, departs 10:05 PM, arrives 12:09 PM the next day, total travel time 11h 4m including layovers, flight time 7h 24m (layovers excluded), $239 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable. Price found in an Aviasales search on September 9, 2026 and read by AirSource on September 10, 2026, 20:48 UTC: it is not guaranteed and is confirmed on Aviasales at booking time. The cheapest direct flight observed: JetBlue B61234, from San Francisco International (SFO) to Boston Logan (BOS), departs 2:39 PM, arrives 11:59 PM, direct, 6h 20m, $474 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable.