Does the Sherpa Original Deluxe (Small) fit Southwest Airlines?

Yes — the Sherpa Original Deluxe (Small) (15 × 10 × 8.5 in) fits Southwest Airlines's 18.5 × 13.5 × 8.5 in under-seat limit, with 0" to spare on its tightest dimension.

15 × 10 × 8.5 in external · up to ~8 lb

Fits against Southwest Airlines's 18.5 × 13.5 × 8.5 in limit

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15 × 10 × 8.5 in is within 18.5 × 13.5 × 8.5 in — 3.5" spare on length, 3.5" on width, 0" on height. Tightest margin is 0", so measure before you fly.

Last verified 2026-07-23 · matched to the published Southwest Airlines limit. Every fit is against the published maximum; real under-seat space varies by aircraft (why).

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