If the visa is for example before the 10th day, and the tickets are convenient and at a price suitable for the 15th, then where should I apply to extend these 5 days?

[Mark]

If the visa is for example before the 10th day, and the tickets are convenient and at a price suitable for the 15th, then where should I apply to extend these 5 days?

[Olga]

Your visa indicates the corridor of entry.

[Eugenii]

Stamp or visa expires? Up to 7 days can be extended at the Immigration Office. If the term ends for the first time you can make a borderran. Or pay a fine on departure 500 baht per day.