# Distance between Hat Yai (HDY) and Haiphong (HPH)

Flight distance from Hat Yai to Haiphong (Hat Yai International Airport – Cat Bi International Airport) is 1045 miles / 1681 kilometers / 908 nautical miles. Estimated flight time is 2 hours 28 minutes.

Driving distance from Hat Yai (HDY) to Haiphong (HPH) is 1450 miles / 2334 kilometers and travel time by car is about 27 hours 47 minutes.

## Map of flight path and driving directions from Hat Yai to Haiphong.

Shortest flight path between Hat Yai International Airport (HDY) and Cat Bi International Airport (HPH).

## How far is Haiphong from Hat Yai?

There are several ways to calculate distances between Hat Yai and Haiphong. Here are two common methods:

Vincenty's formula (applied above)
• 1044.620 miles
• 1681.152 kilometers
• 907.750 nautical miles

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

Haversine formula
• 1048.748 miles
• 1687.797 kilometers
• 911.337 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).

## Airport information

A Hat Yai International Airport
City: Hat Yai
Country: Thailand
IATA Code: HDY
ICAO Code: VTSS
Coordinates: 6°55′59″N, 100°23′34″E

B Cat Bi International Airport
City: Haiphong
Country: Vietnam
IATA Code: HPH
ICAO Code: VVCI
Coordinates: 20°49′9″N, 106°43′29″E

## Time difference and current local times

There is no time difference between Hat Yai and Haiphong.

+07

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## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 154 kg (339 pounds).

## Frequent Flyer Miles Calculator

Hat Yai (HDY) → Haiphong (HPH).

Distance:
1045
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
1045

Round trip?