In-cabin pet carriers that fit Southern Airways Express
The carriers from our list that clear Southern Airways Express's official not published under-seat limit — sorted best-fit first, with the ones that squeeze in when collapsed flagged.
Affiliate link — we may earn a small commission at no extra cost to you. It never changes our specs or which carriers we list.
| Carrier | Size | Fit | Buy |
|---|---|---|---|
 Sherpa Original Deluxe (Small) Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. · collapsible/flex | 15 × 10 × 8.5 in | Size not published | See on Amazon → |
 Mr. Peanut's Gold Series Mini (Low-Profile) Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. · collapsible/flex | 16 × 10.5 × 9.8 in | Size not published | See on Amazon → |
 Petmate Soft-Sided Kennel Cab (Small) Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. | 17 × 10 × 10 in | Size not published | See on Amazon → |
 Sherpa Original Deluxe (Medium) Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. · collapsible/flex | 17 × 11 × 10.5 in | Size not published | See on Amazon → |
 Sleepypod Air Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. · collapsible/flex | 22 × 10.5 × 10.5 in | Size not published | See on Amazon → |
 Diggs Passenger Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. | 17 × 12 × 10.5 in | Size not published | See on Amazon → |
 Sleepypod Atom Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. | 17 × 8.5 × 10.5 in | Size not published | See on Amazon → |
Away The Pet Carrier Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. | 18.7 × 10.8 × 10.75 in | Size not published | See on Amazon → |
 Petsfit Expandable Soft-Sided Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. | 17 × 11 × 11 in | Size not published | See on Amazon → |
 Bergan Comfort Carrier (Small) Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. | 16 × 8 × 11 in | Size not published | See on Amazon → |
Frisco Premium Airline-Compliant Carrier Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. | 18 × 11 × 11 in | Size not published | See on Amazon → |
 Sherpa Original Deluxe (Large) Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. · collapsible/flex | 19 × 11.75 × 11.5 in | Size not published | See on Amazon → |
 Mr. Peanut's Gold Series Standard (Expandable) Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. · collapsible/flex | 18.5 × 11.75 × 11.5 in | Size not published | See on Amazon → |
 SturdiBag Pro (Large, Flexible Height) Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. · collapsible/flex | 18 × 11.5 × 11.5 in | Size not published | See on Amazon → |
 ibiyaya JetPaw Expandable Backpack Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. | 18 × 12 × 12 in | Size not published | See on Amazon → |
Every fit is against the published maximum; real under-seat space varies by aircraft (why). Full rules & fees: Southern Airways Express pet policy →
Citing this policy data? Go ahead — sourced from the official airline page, last verified 2026-07-23. Copy a ready-made reference: