Frontier Airlines via DealBase offers 1-way nationwide fares, with prices starting from $14.31. That's ties our mention from a month ago as the best price we've seen for Frontier flights, and the lowest price we could find for select routes now by at least $5. Book this travel deal by May 30 for travel from June 1 through June 2. Buy Now Tips On the DealBase landing page, click "Frontier Airlines" in the top line to see this sale. We found this price on flights departing Birmingham, AL, with arrival in Orlando, FL (MCO) on June 4. All prices, dates, and booking details were valid at the time of publication.