The flight distance from Phoenix Sky Harbor International Airport (PHX) in Phoenix, United States to Silistra Polkovnik Lambrinovo Airfield (SLS) in Silistra, Bulgaria is 10,459 kilometers (6,499 miles / 5,647 nautical miles). The estimated flight time for this route is approximately 13h, flying north northeast at a heading of 28°.

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 05:12 in Phoenix, it's 14:12 in Silistra. 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.

The return flight from Silistra (SLS) to Phoenix (PHX) follows a heading of 327° (north 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 Phoenix Sky Harbor International Airport (PHX) and Silistra Polkovnik Lambrinovo Airfield (SLS) detail pages, or use our flight duration calculator to compare other routes.