Ten gets you a discount

Chiang Mai-based Kan Air offers passengers, who collect 10 boarding passes, a free one-way fare on of its routes.
It amounts to a 10% discount on sector fares.
Boarding passes must be in a single passenger’s name, for travel on standard fares, between 1 April and 25 March 2015.
The offer remains open until 31 March 2015.
To get the free tickets, passengers hand over 10 boarding passes at the airline’s ticket counter at Chiang Mai airport, its home base from where it serves northern cities.
Kan Air operates flights, ex-Chiang Mai, to Pai, Nan, Mae Hong Son, Phitsanulok and Khon Kaen. The recent revived service Chiang Mai-Chiang Rai route stopped operations 29 March.
Currently, Kan Air is the only airline offering flights out of Chiang Mai to Mae Hong Son province after Nok Air ended its daily service 30 March.

Sourced: ttrweekly