The flight distance from Noi Bai International Airport (HAN) in Hanoi, Vietnam to Helena Regional Airport (HLN) in Helena, United States is 11,572 kilometers (7,190 miles / 6,248 nautical miles). The estimated flight time for this route is approximately 15h, flying north northeast at a heading of 26°.

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 Vietnam 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 10:09 in Hanoi, it's 20:09 in Helena. With a 14-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 3,838 feet between the two airports. Helena Regional Airport sits higher than Noi Bai International Airport.

The return flight from Helena (HLN) to Hanoi (HAN) follows a heading of 324° (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 Noi Bai International Airport (HAN) and Helena Regional Airport (HLN) detail pages, or use our flight duration calculator to compare other routes.