The flight distance from Boundary Airport (BYA) in Boundary, United States to Seattle-Tacoma International Airport (SEA) in Seattle, United States is 2,173 kilometers (1,350 miles / 1,173 nautical miles). The estimated flight time for this route is approximately 4h, flying southeast at a heading of 139°.

This is a medium-haul route that may be operated by either narrow-body or wide-body aircraft depending on demand. Passengers can expect a meal service on most carriers.

This is a domestic route within United States. Both airports operate in the same country, which may simplify travel requirements and documentation. Despite being a domestic route, there is a 1-hour time difference between the two cities.

Time zone information: When it's 01:33 in Boundary, it's 02:33 in Seattle.

There is a significant elevation difference of 2,508 feet between the two airports. Seattle-Tacoma International Airport sits lower than Boundary Airport.

The return flight from Seattle (SEA) to Boundary (BYA) follows a heading of 335° (north northwest). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Boundary Airport (BYA) and Seattle-Tacoma International Airport (SEA) detail pages, or use our flight duration calculator to compare other routes.