The flight distance from Bulgan Sum Airport (HBU) in Bulgan Sum Airport, Mongolia to St Louis Lambert International Airport (STL) in St Louis, United States is 10,578 kilometers (6,573 miles / 5,712 nautical miles). The estimated flight time for this route is approximately 13h, flying north at a heading of 2°.

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 Mongolia with United States. It is an intercontinental flight between Asia and North America. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 23:07 in Bulgan Sum Airport, it's 10:07 in St Louis. With a 13-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 3,304 feet between the two airports. St Louis Lambert International Airport sits lower than Bulgan Sum Airport.

The return flight from St Louis (STL) to Bulgan Sum Airport (HBU) follows a heading of 359° (north). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Bulgan Sum Airport (HBU) and St Louis Lambert International Airport (STL) detail pages, or use our flight duration calculator to compare other routes.