Cheap Allegiant Air Flights
Compare fares for this US ultra-low-cost carrier, check baggage and seating details, and learn the best time to book to keep your Allegiant fare low.
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or request an offerAbout Allegiant Air
Allegiant Air is a US ultra-low-cost carrier founded in 1997 and headquartered near Las Vegas. It follows a distinctive point-to-point leisure model, connecting smaller and mid-size US cities directly to popular vacation destinations like Las Vegas, Florida, and other sun destinations, often on routes not served by larger network carriers.
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Real-Time Fare Comparison
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Flexible Date Search
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Allegiant Air Route Network
Allegiant’s network is built around point-to-point leisure routes from dozens of small and mid-size US cities to a smaller set of popular vacation destinations, rather than a traditional hub-and-spoke model.
Primary Hub
Multiple focus cities (primary: Las Vegas Harry Reid Intl, LAS)
Allegiant operates from a network of focus cities rather than a single dominant hub, with Las Vegas Harry Reid International Airport (LAS) serving as its largest base alongside other significant focus cities across Florida and the Sun Belt.
Alliance & Partner Airlines
Allegiant Air is not a member of Star Alliance, oneworld, or SkyTeam and operates independently as an ultra-low-cost carrier, keeping its no-frills model simple with minimal interline or codeshare partnerships.
Baggage, Seating & Onboard Amenities
A quick reference before you pack — always confirm exact allowances on your fare rules at booking, since they vary by route and cabin.
Carry-On & Personal Item
As an ultra-low-cost carrier, Allegiant’s base fare typically includes only a small personal item; a full-size carry-on bag is usually a separate paid add-on.
Checked Baggage
Checked baggage is not included in the base fare and must be purchased separately — booking it online in advance is significantly cheaper than paying at the airport.
Excess Baggage Fees
Overweight, oversized, or extra bags typically incur a per-bag fee charged at check-in or online in advance — pre-paying online is usually cheaper than paying at the airport.
Seat Selection & Cabin Classes
Allegiant uses a single-class Economy cabin with optional paid extras — seats are randomly assigned for free at check-in, while choosing a specific seat (including extra-legroom Allegiant Extra) costs an additional fee.
How to Find the Cheapest Allegiant Air Fares
Four habits that consistently lower what you pay.
Book in the Sweet-Spot Window
For most Allegiant Air routes, fares tend to be most competitive when booked several weeks to a few months ahead of departure, rather than at the last minute or extremely far out.
Fly Midweek and Off-Peak
Tuesday, Wednesday, and Saturday departures are usually cheaper than Friday or Sunday, and red-eye or early-morning flights often undercut peak daytime departures.
Set Fare Alerts
Track your route and let price-drop notifications do the watching, instead of checking manually every day.
Price-Tracking Tip
Compare a fixed date range over a week or two before deciding — single-day price checks can be misleading.
Compare a fixed date range over a week or two before deciding — single-day price checks can be misleading.
Use Flexible Date Search
Searching a date range instead of one fixed day often surfaces Allegiant Air fares that are noticeably lower just one or two days earlier or later.
Check-In & Day-of-Travel
Online Check-In
Online and mobile check-in generally opens 24–48 hours before departure, letting you select or confirm your seat and download your boarding pass in advance.
Airport Arrival Times
Arrive with enough buffer for check-in, bag drop, and security — this matters more on international Aegean Airlines routes than short domestic hops.
Domestic vs. International Cutoff
International check-in and bag-drop counters usually close earlier relative to departure than domestic ones, so double-check your specific route’s cutoff.
Frequently Asked Questions
Allegiant Air's IATA code is G4, with ICAO code AAY.
Allegiant operates from a network of focus cities rather than one dominant hub, with Las Vegas Harry Reid International Airport (LAS) as its largest base.
No, Allegiant Air is an independent ultra-low-cost carrier and is not a member of Star Alliance, oneworld, or SkyTeam.
Not a full-size one by default — the base fare typically includes only a small personal item, with a full-size carry-on bag sold as a separate add-on, cheaper when purchased in advance online.
No, checked bags are not included in the base fare and must be purchased separately — booking online in advance is significantly cheaper than paying at the airport.
Seat selection is an add-on — a seat is randomly assigned for free by default, while choosing a specific or extra-legroom seat costs extra.
Allegiant's business model focuses on connecting smaller, underserved cities directly to leisure destinations, often flying routes and airports that larger network carriers don't serve.
Allegiant frequently runs fare sales, so booking during a promotion plus choosing off-peak travel days typically produces the lowest total fare once add-ons are factored in.
Changes are generally possible for a fee plus any fare difference; refunds and cancellation terms depend on the specific fare and any optional trip protection purchased — review the conditions carefully at checkout.
Online check-in typically opens a set window before departure; checking in online in advance helps avoid airport counter fees, which is standard practice for ultra-low-cost carriers.
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