The flight distance from Heihe Airport (HEK) in Heihe, China to Sofia Airport (SOF) in Sofia, Bulgaria is 7,332 kilometers (4,556 miles / 3,959 nautical miles). The estimated flight time for this route is approximately 10h, flying northwest at a heading of 309°.

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 China with Bulgaria. It is an intercontinental flight between Asia and Europe. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 14:37 in Heihe, it's 09:37 in Sofia. The 5-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

There is a significant elevation difference of 6,788 feet between the two airports. Sofia Airport sits lower than Heihe Airport. Travelers arriving at the higher-elevation airport should be aware of potential altitude effects.

The return flight from Sofia (SOF) to Heihe (HEK) follows a heading of 43° (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 Heihe Airport (HEK) and Sofia Airport (SOF) detail pages, or use our flight duration calculator to compare other routes.