That's tied with the best price we've seen for Frontier flights, and the best deal for select routes now by at least $5. Buy Now at DealBase Tips On the DealBase landing page, click "Frontier Airlines" in the top line to see this sale. We found this price on flights departing from Atlanta, GA (ATL) with arrival in Orlando, FL (MCO) on November 12. Book this travel deal by October 23 for travel from October 23 through December 18. All prices, dates, and booking details were valid at the time of publication.