BKK to CNX 314 Baht on AirAsia

Here is a sample of an unbelievable airfare on AirAsia.
From: Bangkok (BKK)
To: Chiang Mai (CNX)
Cost: 214 Baht plus 100 Baht Convenience/Credit Card Fee

Total Cost = 314 Baht (approximately 10 USD)
Distance: 720 km
Cost per km: 0.436 Baht
Bus Fare: 1200 Baht (600 Baht One Way)
Saved: 1200 - 314 = 886 Baht!

The Road to Chiang Mai The Road to Chaing Mai: Tranquil Buddhas