Allegiant Air
Keep your underseat bag ready for the weekend and give the airport part of your trip less attention.
Checked against official Allegiant Air baggage rules · Nov 2026
Under the seat
18 × 14 × 8 in46 × 36 × 20 cm
Free on every ticket
Overhead bin
22 × 16 × 10 in56 × 41 × 25 cm
Paid add-on on lowest fare
Sized to Allegiant Air’s exact cabin limit · Picked by frequent flyers
See bags that fitPaid link · As an Amazon Associate I earn from qualifying purchases.