Allegiant Air (G4) — Complete Travel Guide
Everything you need to know about flying with Allegiant Air: baggage policy, carry-on rules, online check-in, cancellation policy, seat selection, and expert tips to save money. This guide is updated regularly to reflect the latest Allegiant Air policies.
Quick Facts About Allegiant Air
- IATA Code: G4
- Carry-On: 1 carry-on bag: 22x16x10 inches (55x40x25 cm), no strict weight limit but must be able to lift overhead
- First Checked Bag: $18 to $50 depending on route and when purchased
- Check-In Opens: 24 hours before departure
- Last Updated: May 2026
Allegiant Air Travel Guides
Explore our detailed guides for Allegiant Air:
- Allegiant Air Baggage Policy — Checked bag fees, weight limits, oversized items, and tips to avoid fees.
- Allegiant Air Carry-On Rules — Carry-on dimensions (22x16x10 in), personal item size, and enforcement.
- Allegiant Air Online Check-In — Check-in opens 24 hours before departure, mobile app, boarding pass options.
- Allegiant Air Cancellation Policy — 24-hour rule, refund eligibility, change fees, and credit options.
- Allegiant Air Seat Selection — Free vs paid seats, upgrade options, and best seat tips.
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