A $49 Frontier fare becomes a $150 fare once you add a carry-on, a checked bag and a seat assignment. That is the whole story of the airline in one sum.
Frontier is a good choice for travelers who want the lowest base fare and can get by with a personal item. It is a poor one for anyone who needs a carry-on, wants to pick a seat, or cares about a schedule that recovers fast when things go wrong, according to the Going travel guide.
What the fare actually buys
The base ticket covers a seat on the plane, though not a specific one, and one free personal item up to 18 x 14 x 8 inches that fits under the seat in front. Everything else is a separate charge, and each add-on costs more the longer you wait. A carry-on added at booking is cheaper than the same bag paid for at the gate.
Gate agents check bag sizes. If your “personal item” is really a carry-on, you pay the higher price on the spot. Fees are current as of September 2026 and can change at Frontier’s discretion.
Safety, and the cabin
Frontier is safe. It flies under the same Federal Aviation Administration rules as Delta, United and American, covering maintenance, pilot training and certification, crew rest and inspections. It also runs one of the youngest fleets in the country, built around fuel-efficient Airbus A320neo-family jets. A cheaper ticket buys fewer comforts, not a less-safe plane.
The comforts are few. Slimline seats barely recline, if at all, with thin padding and tight legroom. The tray table is a small ledge, big enough for a phone or a drink. Food, drinks and water are for sale, and there is no seatback screen and no free Wifi.
On time, or not
The Bureau of Transportation Statistics ranked Frontier tenth of ten major US airlines for on-time performance in 2025. A lean schedule with fewer daily flights leaves fewer seats to move stranded passengers onto. A delay on a legacy airline might cost a couple of hours. On a low-cost carrier it can cost the day.
Reviews on Reddit, Google, Trustpilot and ConsumerAffairs follow the pattern. Praise is nearly always about price. Complaints cover fees, delays and cancellations, and customer service, with travelers saying it is close to impossible to reach a helpful human during a disruption. Frontier has also historically drawn a high number of formal passenger complaints for its size.
A changed field
Spirit Airlines ceased operations in May 2026, which leaves Frontier as effectively the largest remaining ultra-low-cost carrier in the US. On nonstop routes its fares are hard to beat. Against Delta, United or American, the trade is plain: those airlines cost more up front but bundle more, and have far more routes to rebook you onto when a flight is canceled.
Frontier works if you can fit everything in the personal item, your schedule has slack, you fly nonstop, and you are happy to bring your own snacks. Skip it for a cruise departure, a wedding or a same-day connection. Its cheapest seats cluster on off-peak days and less popular departure times.
