Frontier Airlines is based in Denver and comes third. For now, Denver's international routes outside of greater North America remain limited. It has flights to Japan and nine destinations in Europe.

Frontier Airlines is making another offer to merge with bankrupt Spirit Airlines, less than two years after a previous plan fell through. Frontier said in a statement Wednesday that the ...

Frontier Airlines announced Tuesday that all bookings for nonstop travel through Aug. 18 will receive a free carry-on bag, free seat selection, and free flight changes in its Economy Bundle.

Frontier Airlines plans to introduce "first-class" seats in 2025. The move marks a shift from Frontier's no-frills model amid competition from mainline carriers. Spirit Airlines has made similar ...

The airline operates the A380 between Doha and Bangkok, London Heathrow, Paris, Perth, and Sydney. 5. Qantas. A Qantas Airbus A380. Sebastian Kahnert/Getty Images. Qantas has 10 A380s.

Denver-based Frontier Airlines is expanding its Atlanta presence in the coming months, adding nine new domestic and international routes to places including Aruba, Honduras, St. Louis and Columbus ...

Phoenix Sky Harbor is one of three airports to get Frontier Airlines' new flights to this Pacific Northwest city. Here's how to get the cheapest fare.