The flight distance from Sofia Airport (SOF) in Sofia, Bulgaria to San Carlos Airport (SQL) in San Carlos, United States is 10,444 kilometers (6,490 miles / 5,639 nautical miles). The estimated flight time for this route is approximately 13h, flying north northwest at a heading of 333°.

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 15:15 in Sofia, it's 05:15 in San Carlos. 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.

There is a significant elevation difference of 1,737 feet between the two airports. San Carlos Airport sits lower than Sofia Airport.

The return flight from San Carlos (SQL) to Sofia (SOF) follows a heading of 25° (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 Sofia Airport (SOF) and San Carlos Airport (SQL) detail pages, or use our flight duration calculator to compare other routes.