# 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.

### Time Difference

### Hat Yai

### Udon Thani

## Carbon dioxide emissions

Estimated CO_{2} emissions per passenger is 129 kg (283 pounds).

## Frequent Flyer Miles Calculator

Hat Yai (HDY) → Udon Thani (UTH).

### In total

Round trip?