The journey from Boston to San Francisco is a long-haul trip across the United States. The most practical and common way to travel is by air, with direct flights from Logan International (BOS) to San Francisco International (SFO) taking about 6.5 to 7 hours. Driving is a massive 45-hour trip that is not recommended unless you are planning a multi-day cross-country adventure. San Francisco is a compact city with excellent public transit, making it easy to explore once you arrive.
Total Distance: Driving distance 4,900 km; straight-line air distance 4,300 km.
SFO is well-connected to the city via the BART train system.
September to November for the warmest and clearest weather.