The flight distance from Eleftherios Venizelos International Airport (ATH) in Athens, Greece to Great Falls International Airport (GTF) in Great Falls, United States is 9,534 kilometers (5,924 miles / 5,148 nautical miles). The estimated flight time for this route is approximately 12h, flying north northwest at a heading of 332°.

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 11:45 in Athens, it's 02:45 in Great Falls. 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 3,372 feet between the two airports. Great Falls International Airport sits higher than Eleftherios Venizelos International Airport.

The return flight from Great Falls (GTF) to Athens (ATH) follows a heading of 34° (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 Great Falls International Airport (GTF) detail pages, or use our flight duration calculator to compare other routes.