Cheap Flights from Boston to San Francisco — $109

Boston Logan International (BOS) is the city’s primary international gateway and a full-service hub for several legacy carriers, with frequent transatlantic, transcontinental and regional flights. It’s located on Boston Harbor about 3–5 miles (5–8 km) from downtown, with travel times typically 15–30 minutes by car depending on traffic. Public options include the MBTA Blue Line + free Massport shuttle (roughly 20–30 minutes, low fares) and Logan Express buses from suburbs (30–60 minutes, moderate fares). Taxis and app rides can be convenient but subject to peak surcharges. Pros: broad route network and strong ground-transport links; cons: can be busy and may have higher parking and concession prices compared with smaller airports.

San Francisco International (SFO) acts as the region’s primary international and transcontinental hub, handling most long-haul, premium and full-service carriers alongside some low-cost operators. Located about 13 miles south of downtown San Francisco, it’s typically reached in 20–35 minutes by BART or 25–45 minutes by taxi/rideshare depending on traffic; BART fares are usually in the mid single-digit range while taxis and shared rides can be noticeably higher. The airport offers extensive lounges and amenities and is generally convenient for connecting flights, though peak-hour traffic and terminal size can add transit time. For short-haul and budget options, Oakland (OAK) and San Jose (SJC) can be cheaper or more convenient alternatives for certain routes.

The minimum one-way ticket price from Boston to San Francisco is $109 (July 2026), while the maximum is $2,261 (April 2026). On average, a ticket costs $155–$498.

The Boston — San Francisco route is served by a wide range of airlines: 7 in total, including JetBlue Airways, United Airlines, Southwest Airlines, Frontier Airlines, Alaska Airlines, JetHunter, and American Airlines. Competition among carriers gives passengers the opportunity to find tickets at attractive fares — with prices starting from $109. Our service helps compare all available offers within seconds and choose the most convenient option. You can filter flights by price, departure time, or baggage rules to make your trip as comfortable as possible. With so many airlines, there’s always a chance to catch special promotions and save.