The flight distance from Helena Regional Airport (HLN) in Helena, United States to Lisbon Portela Airport (LIS) in Lisbon, Portugal is 7,823 kilometers (4,861 miles / 4,224 nautical miles). The estimated flight time for this route is approximately 10h, flying northeast at a heading of 54°.

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 an international route connecting United States with Portugal. It is an intercontinental flight between North America and Europe. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 10:24 in Helena, it's 17:24 in Lisbon. With a 7-hour time difference, travelers should plan for significant jet lag. It typically takes one day per hour of time difference to fully adjust.

There is a significant elevation difference of 3,503 feet between the two airports. Lisbon Portela Airport sits lower than Helena Regional Airport.

The return flight from Lisbon (LIS) to Helena (HLN) follows a heading of 315° (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 Helena Regional Airport (HLN) and Lisbon Portela Airport (LIS) detail pages, or use our flight duration calculator to compare other routes.