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 × 10.5 × 10 in under-seat limit, with 0.5" to spare on its tightest dimension.

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

Fits against Southwest Airlines's 18 × 10.5 × 10 in limit

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15 × 10 × 8.5 in is within 18 × 10.5 × 10 in — 3" spare on length, 0.5" on width, 1.5" on height. Tightest margin is 0.5", so measure before you fly.

Last verified 2026-09-24 · 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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