Spirit Airlines vs Frontier Airlines — carry-on baggage compared | CabinPax

Carry-on rules side by side: maximum dimensions, weight allowance, personal item. Data updated April 2026.

• Spirit Airlines: 56x46x25 cm · Non disponible
• Frontier Airlines: 40.64x25.4x60.96 cm · 15.88 kg

Both carriers operate in the same league, so the gap on carry-on rules is more granular than philosophical. A few centimetres here, a kilo there — but real consequences at the gate.