The flight distance from Parapat Airport (SIW) in Parapat-Sumatra Island, Indonesia to St Louis Lambert International Airport (STL) in St Louis, United States is 15,312 kilometers (9,514 miles / 8,268 nautical miles). The estimated flight time for this route is approximately 19h, flying north at a heading of 11°.

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 Indonesia 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 03:06 in Parapat-Sumatra Island, it's 14:06 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 2,464 feet between the two airports. St Louis Lambert International Airport sits lower than Parapat Airport.

The return flight from St Louis (STL) to Parapat-Sumatra Island (SIW) follows a heading of 346° (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 Parapat Airport (SIW) and St Louis Lambert International Airport (STL) detail pages, or use our flight duration calculator to compare other routes.