If you buy a roundtrip ticket to a Zest Air destination, you only pay for the trip to your destination of choice and Zest Air will cover the airfare for your trip home!
To avail of this promo, you need to purchase your tickets by August 15. Travel period is from July 31 to October 15, 2009. As of now, their trips from Davao are only to Cebu and Manila.
You can check their fares and travel schedules through their site. Their ad, however, states that this offer is available only by calling 855-3333.
Zest Airways Davao Office
Second level, Victoria Plaza
J.P. Laurel Ave., Davao City
TeleFax: (+63 82) 221-ZEST