The flight distance from Uzundzhovo Air Base (HKV) in Haskovo, Bulgaria to Seattle-Tacoma International Airport (SEA) in Seattle, United States is 9,581 kilometers (5,953 miles / 5,173 nautical miles). The estimated flight time for this route is approximately 12h, flying north northwest at a heading of 339°.

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 Bulgaria 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 07:39 in Haskovo, it's 21:39 in Seattle. With a 10-hour time difference, travelers should plan for significant jet lag. It typically takes one day per hour of time difference to fully adjust.

The return flight from Seattle (SEA) to Haskovo (HKV) follows a heading of 23° (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 Uzundzhovo Air Base (HKV) and Seattle-Tacoma International Airport (SEA) detail pages, or use our flight duration calculator to compare other routes.