The flight distance from Eleftherios Venizelos International Airport (ATH) in Athens, Greece to Helena Regional Airport (HLN) in Helena, United States is 9,640 kilometers (5,990 miles / 5,205 nautical miles). The estimated flight time for this route is approximately 12h, flying north northwest at a heading of 331°.

This is an ultra-long-haul route, one of the longest in aviation. It requires wide-body aircraft with extended range capability such as the Airbus A350-900ULR or Boeing 777-200LR. Passengers should prepare for an extended flight with multiple meal services.

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

Time zone information: When it's 01:18 in Athens, it's 16:18 in Helena. With a 9-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 3,569 feet between the two airports. Helena Regional Airport sits higher than Eleftherios Venizelos International Airport.

The return flight from Helena (HLN) to Athens (ATH) follows a heading of 33° (north northeast). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

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