Frontier Airlines

Frontier Airlines charges $50 for a carry-on bag, $35 more than #5 Wizz Air, and its seat padding measures just 1.5 inches, 40% thinner than the average coach seat. The airline's on-time performance of 64% in 2023 ranks 20% worse than the US industry average, and its cancellation rate of 3.5% is double that of Delta Air Lines. The "Essentials" fare includes only a personal item, and 85% of passengers pay add-on fees averaging $80 per trip, making it the most expensive low-cost option. Customer satisfaction scores sit at 1.8 out of 5, the lowest among US carriers.