BOS to SEA: Distance and Flight Time
The distance from Boston Logan International Airport (BOS) to Seattle–Tacoma International Airport (SEA) is 4,006 km (2,489 mi). A typical nonstop flight covers it in about 5h 30m, heading northwest. The distance is the same in either direction (SEA to BOS).
How far is it from Boston to Seattle?
The great-circle distance between Boston Logan International Airport (BOS) and Seattle–Tacoma International Airport (SEA) is 4,006 km (2,489 mi, 2,163 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 SEA?
A nonstop flight typically takes about 5h 30m. This is an estimate from the distance; actual block times depend on the aircraft, winds and the exact routing. SEA is roughly northwest of BOS.
How is the BOS to SEA route written in code?
The pair is written BOS-SEA in IATA codes and KBOS-KSEA in ICAO codes, the form used on a flight plan. Boston Logan International Airport is BOS (KBOS), Seattle–Tacoma International Airport is SEA (KSEA).
| BOS | SEA | |
|---|---|---|
| Airport | Boston Logan International Airport | Seattle–Tacoma International Airport |
| ICAO code | KBOS | KSEA |
| Country | United States | United States |
| Elevation | 20 ft | 433 ft |
| Rank by connections | #61 | #67 |
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.
SEA sits 413 ft (126 m) higher than BOS, which is a real difference in air density on takeoff.
Airlines flying BOS to SEA
2 airlines appear on this route in the open route dataset, 2 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:
| IATA | Airline | ICAO | Callsign | Status |
|---|---|---|---|---|
| AS | Alaska Airlines | ASA | Alaska | Active |
| B6 | JetBlue Airways | JBU | Jetblue | Active |
A further 1 carrier sell this pair as a codeshare without operating it: AA.
Route and carrier data comes from the OpenFlights open dataset, regenerated here on . 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
How far is Boston from Seattle?
Boston Logan International Airport (BOS) and Seattle–Tacoma International Airport (SEA) are 4,006 km (2,489 mi, 2,163 nautical miles) apart in a straight line.
How long is the flight from BOS to SEA?
A typical nonstop flight between BOS and SEA takes about 5h 30m. Actual times vary with aircraft type, winds and routing.
What direction is SEA from BOS?
Seattle–Tacoma International Airport (SEA) lies roughly northwest of Boston Logan International Airport (BOS).
Which airlines fly BOS to SEA?
2 airlines appear on the BOS-SEA route in the open dataset, including Alaska Airlines, JetBlue Airways.
Related routes
Other routes from Boston (BOS):
Other routes from Seattle (SEA):
BOS airport code · SEA airport code · Busiest airports worldwide