So this game has a few rules...
-This airline has to be operating in any place/destination in your country.
-Free tickets doesn't count
-Have fun!
I'll start.. the cheapest ticket I could find is from all the local airlines we have here (Philippine Airlines, Cebu Pacific, and etc..) usually has this promos called "Piso Fare" like stated tickets are priced at 1 peso each which is $0.02 USD but a more common promo is the 5 peso fare which is $0.1 USD.