The flight distance from The Florida Keys Marathon International Airport (MTH) in Marathon, United States to Portland International Airport (PDX) in Portland, United States is 4,363 kilometers (2,711 miles / 2,356 nautical miles). The estimated flight time for this route is approximately 6h, flying northwest at a heading of 313°.

This is a long-haul route typically operated by wide-body aircraft such as the Boeing 777 or Airbus A350. Full meal service, in-flight entertainment, and comfort amenities are standard.

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 3-hour time difference between the two cities.

Time zone information: When it's 13:19 in Marathon, it's 10:19 in Portland. The 3-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

The return flight from Portland (PDX) to Marathon (MTH) follows a heading of 108° (east southeast). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the The Florida Keys Marathon International Airport (MTH) and Portland International Airport (PDX) detail pages, or use our flight duration calculator to compare other routes.