Does the Petsfit Expandable Soft-Sided fit Delta Air Lines?
Yes — the Petsfit Expandable Soft-Sided (17 × 11 × 11 in) fits Delta Air Lines's 18 × 11 × 11 in under-seat limit, with 0" to spare on its tightest dimension.
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17 × 11 × 11 in is within 18 × 11 × 11 in — 1" spare on length, 0" on width, 0" on height. Tightest margin is 0", so measure before you fly.
Last verified 2026-07-23 · matched to the published Delta Air Lines limit. Every fit is against the published maximum; real under-seat space varies by aircraft (why).
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