Does the Sherpa Original Deluxe (Small) fit Frontier Airlines?
Yes — the Sherpa Original Deluxe (Small) (15 × 10 × 8.5 in) fits Frontier Airlines's 18 × 14 × 11 in under-seat limit, with 2.5" to spare on its tightest dimension.
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15 × 10 × 8.5 in is within 18 × 14 × 11 in — 3" spare on length, 4" on width, 2.5" on height.
Last verified 2026-07-23 · matched to the published Frontier Airlines limit. Every fit is against the published maximum; real under-seat space varies by aircraft (why).
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