Cheap flights from San Francisco to Boston

One-way fares from $226 · SFO → BOS · prices found by travellers in the last 48 hours

Compare all dates Boston → San Francisco
Cheapest fare
$226

Southwest Airlines · Tue, Jun 1

Cheapest month
June

from $226

Direct flights
Not recently

Usually 1+ stop

Quickest trip
7h 24m

4,330 km

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Cheapest month to fly from San Francisco to Boston

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 $267
  2. June 2027 Cheapest $226

Cheapest dates in June 2027

The lowest fares we've seen for each day, cheapest first.

Southwest Airlines
Depart18:30 Tue, Jun 1SJC → BOS 7h 25m · 2 stops
$226one way, per person
View deal
See every date in June 2027 →

Plan the rest of your trip to Boston

Where to stay, what to do and getting around, from our travel partners.

Where to stay

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Things to do

Things to do in BostonTours, attractions and day trips on Klook Explore →

Getting around

Airport transfer in BostonPre-book a driver to meet you at arrivals, with Kiwitaxi Book a transfer → Car hire in BostonCompare rental cars from major brands on EconomyBookings Compare cars →

About flights from San Francisco to Boston

San Francisco (SFO) and Boston (BOS) are about 4,330 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 7h 24m. Over the next few months, one-way fares start from $226, and June 2027 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from San Francisco to Boston?

The cheapest one-way fare we've seen recently is $226 with Southwest Airlines, departing Tuesday, June 1, 2027. Over the coming months, the lowest fare in each month ranges from $226 to $267.

What is the cheapest month to fly from San Francisco to Boston?

June 2027 currently has the lowest fares, from $226 one way.

Are there direct flights from San Francisco to Boston?

We haven't seen direct fares recently, so most journeys include at least one stop.

How long is the flight from San Francisco to Boston?

The quickest journey we've seen takes about 7h 24m. San Francisco and Boston are around 4,330 km apart.

Which airlines fly from San Francisco to Boston?

Recent fares on this route were with Frontier Airlines and Southwest Airlines.

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