BOS to DEN: Distance and Flight Time

How far is it from Boston to Denver?

The great-circle distance between Boston Logan International Airport (BOS) and Denver International Airport (DEN) is 2,816 km (1,750 mi, 1,520 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 DEN?

A nonstop flight typically takes about 4h. This is an estimate from the distance; actual block times depend on the aircraft, winds and the exact routing. DEN is roughly west of BOS.

How is the BOS to DEN route written in code?

The pair is written BOS-DEN in IATA codes and KBOS-KDEN in ICAO codes, the form used on a flight plan. Boston Logan International Airport is BOS (KBOS), Denver International Airport is DEN (KDEN).

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.

DEN sits 5,411 ft (1,649 m) higher than BOS, which is a real difference in air density on takeoff.

Airlines flying BOS to DEN

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 Denver (DEN):

BOS airport code · DEN airport code · Busiest airports worldwide