Orlando, Philadelphia, and Cleveland Hopkins Intl are the top airports Frontier flies into and out of during the year.
A flight from Orlando to Charlotte Douglas, which has 0 stops, is Rp 477,511 which is the least expensive round-trip domestic flight that Frontier offers. The cheapest one-way Frontier ticket is flying from Las Vegas Harry Reid Intl to Denver Intl. You can expect to pay around Rp 215,650 per ticket. This flight has 0 stops.
Frontier does not have flights from Denpasar Bali Ngurah Rai at the moment. There are scheduled flights with Frontier out of Seattle/Tacoma Intl though (if you don’t mind flying from this airport). Flying with Alaska Airlines is recommended if you still want to fly from Denpasar Bali Ngurah Rai.