How much is a ticket from Bangkok to Chiang Rai?

The cheapest price found today is $26.

When is it cheaper to fly?

Cheapest month is August — from $26.

Cheapest today — $26. Below is what booking services offer.

Departure	Airline	Stops	Price
Aug 24	Thai Vietjet Air	direct	$26	View
Sep 9	Thai Vietjet Air	direct	$27	View
Aug 26	Nok Air	direct	$30	View
Aug 27	Nok Air	direct	$30	View
Oct 1	Nok Air	direct	$31	View

How much is a ticket from Bangkok to Chiang Rai?: The cheapest price found today is $26.
When is it cheaper to fly?: Cheapest month is August — from $26.

Links to booking services are affiliate links. The price stays the same for you.