The flight distance from Noi Bai International Airport (HAN) in Hanoi, Vietnam to University Of Oklahoma Westheimer Airport (OUN) in Norman, United States is 13,273 kilometers (8,247 miles / 7,167 nautical miles). The estimated flight time for this route is approximately 17h, flying north northeast at a heading of 22°.

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 23:58 in Hanoi, it's 11:58 in Norman. With a 12-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 1,143 feet between the two airports. University Of Oklahoma Westheimer Airport sits higher than Noi Bai International Airport.

The return flight from Norman (OUN) to Hanoi (HAN) follows a heading of 335° (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 Noi Bai International Airport (HAN) and University Of Oklahoma Westheimer Airport (OUN) detail pages, or use our flight duration calculator to compare other routes.