Is Frontier Airline Or Spirit Airline Better Deciding between Frontier Airlines and Spirit Airlines depends on your priorities. Frontier tends to offer more routes and destinations, while Spirit often boasts lower base fares but charges for additional amenities. Frontier may be preferable for travelers seeking a wider network, whereas Spirit might appeal to budget-conscious flyers willing to forego certain comforts for cheaper tickets. Both airlines have mixed reviews regarding customer service and onboard experience, so it's essential to weigh cost against convenience and comfort when making your choice.