The flight distance from Helena Regional Airport (HLN) in Helena, United States to Seattle-Tacoma International Airport (SEA) in Seattle, United States is 788 kilometers (490 miles / 425 nautical miles). The estimated flight time for this route is approximately 2h, flying west at a heading of 281°.

This is a short-haul route typically served by narrow-body aircraft such as the Boeing 737 or Airbus A320 family. In-flight service is usually limited to drinks and light snacks.

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 19:30 in Helena, it's 18:30 in Seattle.

There is a significant elevation difference of 3,445 feet between the two airports. Seattle-Tacoma International Airport sits lower than Helena Regional Airport.

The return flight from Seattle (SEA) to Helena (HLN) follows a heading of 93° (east). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

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