# Distance between Rayong (UTP) and Chiang Rai (CEI)

Flight distance from Rayong to Chiang Rai (U-Tapao International Airport – Chiang Rai International Airport) is 506 miles / 814 kilometers / 439 nautical miles. Estimated flight time is 1 hour 27 minutes.

Driving distance from Rayong (UTP) to Chiang Rai (CEI) is 617 miles / 993 kilometers and travel time by car is about 11 hours 30 minutes.

## Map of flight path and driving directions from Rayong to Chiang Rai.

Shortest flight path between U-Tapao International Airport (UTP) and Chiang Rai International Airport (CEI).

## How far is Chiang Rai from Rayong?

There are several ways to calculate distances between Rayong and Chiang Rai. Here are two common methods:

Vincenty's formula (applied above)
• 505.583 miles
• 813.657 kilometers
• 439.339 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
• 507.945 miles
• 817.458 kilometers
• 441.392 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 U-Tapao International Airport
City: Rayong
Country: Thailand
IATA Code: UTP
ICAO Code: VTBU
Coordinates: 12°40′47″N, 101°0′17″E

B Chiang Rai International Airport
City: Chiang Rai
Country: Thailand
IATA Code: CEI
ICAO Code: VTCT
Coordinates: 19°57′8″N, 99°52′58″E

## Time difference and current local times

There is no time difference between Rayong and Chiang Rai.

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## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 99 kg (219 pounds).

## Frequent Flyer Miles Calculator

Rayong (UTP) → Chiang Rai (CEI).

Distance:
506
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
506

Round trip?