The flight distance from Greeley-Weld County Airport (GXY) in Greeley, United States to Sofia Airport (SOF) in Sofia, Bulgaria is 9,400 kilometers (5,841 miles / 5,076 nautical miles). The estimated flight time for this route is approximately 12h, flying northeast at a heading of 36°.

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 United States with Bulgaria. 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 22:49 in Greeley, it's 07:49 in Sofia. 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 2,955 feet between the two airports. Sofia Airport sits lower than Greeley-Weld County Airport.

The return flight from Sofia (SOF) to Greeley (GXY) follows a heading of 323° (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 Greeley-Weld County Airport (GXY) and Sofia Airport (SOF) detail pages, or use our flight duration calculator to compare other routes.