Distance From St Louis Regional Airport to Noi Bai International Airport, ALN - HAN Distance

The distance from St Louis Regional Airport (ALN) to Noi Bai International Airport (HAN) is 8159 miles or 13130 kilometers or 7085 nautical miles.

The distance shown below is direct flight distance between airports. Straight-line distance does not account for the surface between the two points. It is the distance a bird or airplane would travel between the two points when flying above the surface. The straight line distance is the direct route between two points, regardless of whether or not there are roads that connect them.

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How long does it take to travel from Alton/St Louis ( United States ) to Hanoi (Soc Son) ( Vietnam )?

A one-way nonstop (direct) flight between Alton/St Louis and Hanoi (Soc Son) takes around 18 hours 45 minutes.

Estimated flight time from St Louis Regional Airport, Alton/St Louis, United States to Noi Bai International Airport, Hanoi (Soc Son), Vietnam is 18 hours 45 minutes under avarage conditions. Your actual flying time may vary depending on wind direction/speed or weather conditions. This calculation does not include the departure and landing times of the aircraft. In addition, it does not cover the person identity check, ticket check-in and baggage collection times at the airport.

Travel Distance Between the Airports • ALN - HAN

Kilometers		13130 km
Statute Miles		8159 miles
Nautical Miles		7085 nm
Avg. Time of Flight		18 hours 45 minutes

St Louis Regional Airport to Noi Bai International Airport Flight Route Map - ALN to HAN Flight Path

Location of St Louis Regional Airport & Noi Bai International Airport is given below.
Click the map to view Alton/St Louis to Hanoi (Soc Son) nonstop flight path and travel direction.

Click to see flight route on Google Map between Alton/St Louis, United States and Hanoi (Soc Son), Vietnam. .

Nonstop flight route between Alton/St Louis, United States and Hanoi (Soc Son), Vietnam.

Time Difference Between the Airports • ALN - HAN

Time difference between Alton/St Louis (United States) and Hanoi (Soc Son) (Vietnam) is 12 Hours.
Hanoi (Soc Son) time is 12 Hours ahead of Alton/St Louis.

Location	Local Time
Alton/St Louis (United States)	2025-12-16, 04:28:07 EST
Hanoi (Soc Son) (Vietnam)	2025-12-16, 16:28:07 +07

Why should you arrive 3 hours before international flight? Flyers who are traveling to an international destination should arrive at the airport earlier than domestic flyers. This is because international flights can have additional check-in requirements, like passport verification, that need to be completed before you receive your boarding pass.

Origin

St Louis Regional Airport (ALN / KALN) Alton/St Louis, United States

Destination

Noi Bai International Airport (HAN / VVNB) Hanoi (Soc Son), Vietnam