BOS to SFO: Distance and Flight Time

How far is it from Boston to San Francisco?

The great-circle distance between Boston Logan International Airport (BOS) and San Francisco International Airport (SFO) is 4,341 km (2,697 mi, 2,344 nautical miles). That is the straight-line distance; a real flight is a little longer because of air-traffic routing.

How long is the flight from BOS to SFO?

A nonstop flight typically takes about 5h 55m. This is an estimate from the distance; actual block times depend on the aircraft, winds and the exact routing. SFO is roughly west of BOS.

How is the BOS to SFO route written in code?

The pair is written BOS-SFO in IATA codes and KBOS-KSFO in ICAO codes, the form used on a flight plan. Boston Logan International Airport is BOS (KBOS), San Francisco International Airport is SFO (KSFO).

Both ICAO codes start with K, the prefix ICAO assigns to the contiguous United States, so this is a route inside one ICAO region. How ICAO prefixes are laid out.

The two fields sit at almost the same height, within 7 ft (2 m) of each other.

Airlines flying BOS to SFO

3 airlines appear on this route in the open route dataset, 3 of them still listed as active. Each row gives the IATA code, the ICAO code and the radio callsign, which is what an air traffic controller hears:

Route and carrier data comes from the OpenFlights open dataset, regenerated here on 3 July 2026. It is a historical snapshot of scheduled connections, not a live schedule, and it includes codeshare listings, so some carriers shown may no longer operate the route or exist. How we build this · Data and sources.

Frequently asked questions

Related routes

Other routes from Boston (BOS):

Other routes from San Francisco (SFO):

BOS airport code · SFO airport code · Busiest airports worldwide