Yes no problem, just check to make sure it's the same kind of ticket. A lot of times the cheap prices shown don't include meals or checked luggage.
Other times the cheap option tries to sell you these things, even though the airline gives it to you for free, regardless of where you bought your ticket.
the banks don't let you open a bank account on DTV. Trust me, I've tried. I've been on the phone with the SCB head office while sitting at the Central Pattaya branch and they refuse to budge on the work permit-rule.
Thai banking is designed for the opposite of user friendliness.