Which has the bigger carry-on allowance, Allegiant or Frontier?

Allegiant: 22 × 16 × 10 in (56 × 41 × 25 cm). Frontier: 24 × 16 × 10 in (61 × 41 × 25 cm), up to 35 lb (15.9 kg). Frontier allows the larger bag.

Do Allegiant and Frontier include a carry-on on basic economy?

Allegiant: Fares include only a personal item. A carry-on is a paid add-on, cheapest at booking. Frontier: The Basic fare includes only a personal item. Add a carry-on when you book; it costs the most at the gate.

Which is more reliable, Allegiant or Frontier?

In 2025 Allegiant arrived on time 74.5% of the time (0.5% cancelled) and Frontier 70.7% (1.8% cancelled), according to U.S. DOT data.

Which cancels fewer flights, Allegiant or Frontier?

In 2025 Allegiant cancelled 0.5% of its flights and Frontier 1.8%, so Allegiant had the edge (U.S. DOT data).

Are Allegiant and Frontier partners?

They aren't in the same alliance (Allegiant: none; Frontier: none), so miles and status generally don't transfer between them.

G4 vs F9 · 2026 comparison

Allegiant vs Frontier

Allegiant wins on a more generous carry-on weight limit, cheaper checked bags, a better on-time record and fewer cancellations; Frontier wins on a bigger carry-on and a bigger personal item. Here's how they compare on bags, fees, comfort, reliability and loyalty.

Verified Oct 17, 2026By Steven MoHow we check Report a correction

Allegiant

Wins 4 categories

A more generous carry-on weight limit
Cheaper checked bags
A better on-time record
Fewer cancellations

Frontier

Wins 2 categories

A bigger carry-on
A bigger personal item

Quick verdict

Allegiant wins on a more generous carry-on weight limit, cheaper checked bags, a better on-time record and fewer cancellations; Frontier wins on a bigger carry-on and a bigger personal item. Check the cheapest fare's bag rules before you compare prices.

Carry-on size: Allegiant: 22 × 16 × 10 in · Frontier: 24 × 16 × 10 in
Carry-on on the cheapest fare: Allegiant: Costs extra on basic fares · Frontier: Costs extra on basic fares
First checked bag (regular economy): Allegiant: $20–$50 · Frontier: $29–$63
On-time arrivals (2025): Allegiant: 74.5% · Frontier: 70.7%

Side by side

	Allegiant	Frontier
Bags
Carry-on size	22 × 16 × 10 in	24 × 16 × 10 in
Carry-on on the cheapest fare	Costs extra on basic fares	Costs extra on basic fares
Carry-on weight limit	None published	35 lb (15.9 kg)
Personal item	7 × 15 × 16 in	18 × 14 × 8 in
First checked bag (regular economy)	$20–$50	$29–$63
Reliability
On-time arrivals (2025)	74.5%	70.7%
Flights cancelled (2025)	0.5%	1.8%
Network
Alliance	None	None
Loyalty program	Allways Rewards	FRONTIER Miles
Main hubs	LAS, SFB, PIE, AZA	DEN

Highlighted values are better for travelers. Fees are for U.S. domestic economy flights; on-time data is 2025 U.S. DOT figures for each airline's own flights.

Bags and fees

Allegiant allows a carry-on up to 22 × 16 × 10 in (56 × 41 × 25 cm), and Frontier up to 24 × 16 × 10 in (61 × 41 × 25 cm), so Frontier's is roomier.

Allegiant charges for it on its cheapest fare, while Frontier charges for it on its cheapest fare.

Frontier caps carry-ons at 35 lb (15.9 kg); Allegiant publishes no limit.

Personal items: 7 × 15 × 16 in (18 × 38 × 41 cm) on Allegiant, and 18 × 14 × 8 in (46 × 36 × 20 cm) on Frontier.

A first checked bag on Allegiant costs $20–$50 on all Allegiant flights, and a first checked bag on Frontier costs $29–$63 on all Frontier flights.

Basic economy

Allegiant (Base fare): Fares include only a personal item. A carry-on is a paid add-on, cheapest at booking.

Frontier (Basic): The Basic fare includes only a personal item. Add a carry-on when you book; it costs the most at the gate.

On-time performance

In 2025, Allegiant landed 74.5% of its flights on time and cancelled 0.5%; Frontier landed 70.7% on time and cancelled 1.8%. That makes Allegiant the more punctual of the two. The figures come from the U.S. DOT and count each airline's own flights, not regional partners.

Loyalty and where they fly

Allegiant is not in an alliance and Frontier is not in an alliance.

Loyalty programs: Allways Rewards (Allegiant) and FRONTIER Miles (Frontier).

Allegiant's main hubs are Las Vegas (LAS), Orlando Sanford (SFB), St. Petersburg–Clearwater (PIE), Phoenix–Mesa (AZA). Frontier's are Denver (DEN). The best choice often comes down to which airline flies nonstop from your airport.

Which should you book?

Choose Allegiant if you want…

a more generous carry-on weight limit
cheaper checked bags
a better on-time record
fewer cancellations
nonstops from LAS, SFB, PIE

Choose Frontier if you want…

a bigger carry-on
a bigger personal item
nonstops from DEN

On a route both fly, the cheaper ticket isn't always the cheaper trip: add the bags you'll actually bring, and check the fare rules before you book.