Alaska Airlines Flights from San Francisco to Boston

Alaska Airlines on this route

San Francisco is a Alaska Airlines hub, so Alaska Airlines typically offers several daily departures on SFO–BOS, with nonstop service where demand supports it and connections through its other hubs otherwise. The nonstop flight time is about 5h 46m.

Fare classes available: Saver, Main, Premium Class, First Class. No change fees on Main and First fares; fare difference applies.

Recorded lows on SFO–BOS start at $346 one-way. That figure comes from cached search data and moves with demand, so treat it as a benchmark for what a good price looks like rather than a guaranteed fare.

Delta Air Lines and United Airlines both operate hubs at one end of this route, so nonstop or single-connection service is usually available, along with American Airlines and Southwest Airlines. Our agents can book any of them and compare fare classes side by side.

Covering 2,698 miles, the flight runs around 5h 46m nonstop. On sectors this long, one-stop itineraries through a hub are often priced well below the nonstop and add only a few hours; the agent will show both.

When to fly

West Coast and Mountain departures spike over summer holidays and the December break; January (after New Year), late April, May, and September are usually the cheapest windows.

On this specific route our fare history shows October as the cheapest month and December as the most expensive, a spread of $220 between the two.

Midweek travel almost always beats weekends on price here. If your dates are flexible by a day or two, tell the agent; shifting a Friday departure to Thursday or a Sunday return to Monday is the single most reliable way to cut the fare.

For domestic travel, booking three to eight weeks ahead usually captures the best price. Inside two weeks, fares climb; more than four months out, airlines have not yet released their cheapest inventory.