# Distance between Hat Yai (HDY) and Udon Thani (UTH)

Flight distance from Hat Yai to Udon Thani (Hat Yai International Airport – Udon Thani International Airport) is 737 miles / 1185 kilometers / 640 nautical miles. Estimated flight time is 1 hour 53 minutes.

Driving distance from Hat Yai (HDY) to Udon Thani (UTH) is 935 miles / 1504 kilometers and travel time by car is about 16 hours 54 minutes.

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

Shortest flight path between Hat Yai International Airport (HDY) and Udon Thani International Airport (UTH).

## How far is Udon Thani from Hat Yai?

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

Vincenty's formula (applied above)
• 736.526 miles
• 1185.323 kilometers
• 640.023 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
• 740.085 miles
• 1191.051 kilometers
• 643.116 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 Udon Thani International Airport
City: Udon Thani
Country: Thailand
IATA Code: UTH
ICAO Code: VTUD
Coordinates: 17°23′11″N, 102°47′16″E

## Time difference and current local times

There is no time difference between Hat Yai and Udon Thani.

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## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 129 kg (283 pounds).

## Frequent Flyer Miles Calculator

Hat Yai (HDY) → Udon Thani (UTH).

Distance:
737
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
737

Round trip?