Spirit Airlines vs Frontier Airlines
Cabin baggage rules side by side, and the safe bag size for both.
| Spirit Airlines | Frontier Airlines | |
|---|---|---|
| Free bag size | 45 × 35 × 20 cm | 46 × 36 × 20 cm |
| Weight limit | — | 16 kg |
| Free cabin bag? | Under-seat only | Under-seat only |
Verdict
Frontier Airlines is more generous — its free allowance (46 × 36 × 20 cm) is larger than Spirit Airlines's (45 × 35 × 20 cm).
Safe size for both
45 × 35 × 20 cm
Fits the free allowance of both airlines.
FAQ
Is Spirit Airlines or Frontier Airlines stricter on cabin bags?+
Frontier Airlines is more generous — its free allowance (46 × 36 × 20 cm) is larger than Spirit Airlines's (45 × 35 × 20 cm).
What bag fits both Spirit Airlines and Frontier Airlines?+
To be safe on both, choose a bag no larger than 45 × 35 × 20 cm. That fits inside the free allowance of each airline.