# How far is Haiphong from Chiang Mai?

The distance between Chiang Mai (Chiang Mai International Airport) and Haiphong (Cat Bi International Airport) is 525 miles / 844 kilometers / 456 nautical miles.

The driving distance from Chiang Mai (CNX) to Haiphong (HPH) is 838 miles / 1348 kilometers, and travel time by car is about 18 hours 55 minutes.

525
Miles
844
Kilometers
456
Nautical miles
1 h 29 min
102 kg

## Distance from Chiang Mai to Haiphong

There are several ways to calculate the distance from Chiang Mai to Haiphong. Here are two standard methods:

Vincenty's formula (applied above)
• 524.676 miles
• 844.385 kilometers
• 455.931 nautical miles

Vincenty's formula calculates the distance between latitude/longitude points on the earth's surface using an ellipsoidal model of the planet.

Haversine formula
• 524.116 miles
• 843.482 kilometers
• 455.444 nautical miles

The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance – the shortest distance between two points).

## How long does it take to fly from Chiang Mai to Haiphong?

The estimated flight time from Chiang Mai International Airport to Cat Bi International Airport is 1 hour and 29 minutes.

## Flight carbon footprint between Chiang Mai International Airport (CNX) and Cat Bi International Airport (HPH)

On average, flying from Chiang Mai to Haiphong generates about 102 kg of CO2 per passenger, and 102 kilograms equals 225 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

## Map of flight path and driving directions from Chiang Mai to Haiphong

See the map of the shortest flight path between Chiang Mai International Airport (CNX) and Cat Bi International Airport (HPH).

## Airport information

Origin Chiang Mai International Airport
City: Chiang Mai
Country: Thailand
IATA Code: CNX
ICAO Code: VTCC
Coordinates: 18°46′0″N, 98°57′45″E
Destination Cat Bi International Airport
City: Haiphong
Country: Vietnam
IATA Code: HPH
ICAO Code: VVCI
Coordinates: 20°49′9″N, 106°43′29″E