Does the SturdiBag Pro (Large, Flexible Height) fit Delta Air Lines?

No — the SturdiBag Pro (Large, Flexible Height) (18 × 11.5 × 11.5 in) does not fit Delta Air Lines's 18 × 11 × 11 in under-seat limit.

SturdiBag publishes no pet-size limit for this carrier. The 18 × 11.5 × 11.5 in above is what Delta Air Lines measures, not the room your pet gets — measure your pet lying down before you buy. How →

18 × 11.5 × 11.5 in external

Too big against Delta Air Lines's 18 × 11 × 11 in limit

See on Amazon →

Affiliate link — we may earn a small commission at no extra cost to you. It never changes our specs or which carriers we list.

18 × 11.5 × 11.5 in is over the 18 × 11 × 11 in limit.

Last verified 2026-09-04 · matched to the published Delta Air Lines limit. Every fit is against the published maximum; real under-seat space varies by aircraft (why).

Full Delta Air Lines shortlist: all carriers that fit Delta Air Lines → · this carrier on other airlines: SturdiBag Pro (Large, Flexible Height) specs → · Delta Air Lines rules & fees: Delta Air Lines pet policy →