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

Alaska: 22 × 14 × 9 in (56 × 36 × 23 cm). Allegiant: 22 × 16 × 10 in (56 × 41 × 25 cm). Allegiant allows the larger bag.

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

Alaska: Saver fares include a carry-on and a personal item. Checked bags cost extra. Allegiant: Fares include only a personal item. A carry-on is a paid add-on, cheapest at booking.

Which is more reliable, Alaska or Allegiant?

In 2025 Alaska arrived on time 75.8% of the time (1.2% cancelled) and Allegiant 74.5% (0.5% cancelled), according to U.S. DOT data.

Which cancels fewer flights, Alaska or Allegiant?

In 2025 Alaska cancelled 1.2% of its flights and Allegiant 0.5%, so Allegiant had the edge (U.S. DOT data).

Are Alaska and Allegiant partners?

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

AS vs G4 · 2026 comparison

Alaska vs Allegiant

Alaska wins on a carry-on on its cheapest fare and a better on-time record; Allegiant wins on a bigger carry-on, cheaper checked bags and fewer cancellations. Here's how they compare on bags, fees, comfort, reliability and loyalty.

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

Alaska

Wins 2 categories

A carry-on on its cheapest fare
A better on-time record

Allegiant

Wins 3 categories

A bigger carry-on
Cheaper checked bags
Fewer cancellations

Quick verdict

Alaska wins on a carry-on on its cheapest fare and a better on-time record; Allegiant wins on a bigger carry-on, cheaper checked bags and fewer cancellations. Check the cheapest fare's bag rules before you compare prices.

Carry-on size: Alaska: 22 × 14 × 9 in · Allegiant: 22 × 16 × 10 in
Carry-on on the cheapest fare: Alaska: Included on every fare · Allegiant: Costs extra on basic fares
First checked bag (regular economy): Alaska: $45 · Allegiant: $20–$50
On-time arrivals (2025): Alaska: 75.8% · Allegiant: 74.5%

Side by side

	Alaska	Allegiant
Bags
Carry-on size	22 × 14 × 9 in	22 × 16 × 10 in
Carry-on on the cheapest fare	Included on every fare	Costs extra on basic fares
Carry-on weight limit	None published	None published
Personal item	Must fit under the seat	7 × 15 × 16 in
First checked bag (regular economy)	$45	$20–$50
Reliability
On-time arrivals (2025)	75.8%	74.5%
Flights cancelled (2025)	1.2%	0.5%
Network
Alliance	oneworld	None
Loyalty program	Atmos Rewards	Allways Rewards
Main hubs	SEA, PDX, SFO, LAX, ANC	LAS, SFB, PIE, AZA

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

Alaska allows a carry-on up to 22 × 14 × 9 in (56 × 36 × 23 cm), and Allegiant up to 22 × 16 × 10 in (56 × 41 × 25 cm), so Allegiant's is roomier.

Alaska includes it on every fare, while Allegiant charges for it on its cheapest fare.

Neither publishes a carry-on weight limit.

Personal items: anything that fits under the seat on Alaska, and 7 × 15 × 16 in (18 × 38 × 41 cm) on Allegiant.

A first checked bag on Alaska costs $45 on flights within North America, and a first checked bag on Allegiant costs $20–$50 on all Allegiant flights.

Basic economy

Alaska (Saver): Saver fares include a carry-on and a personal item. Checked bags cost extra.

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

On-time performance

In 2025, Alaska landed 75.8% of its flights on time and cancelled 1.2%; Allegiant landed 74.5% on time and cancelled 0.5%. That makes Alaska 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

Alaska is in oneworld and Allegiant is not in an alliance.

Loyalty programs: Atmos Rewards (Alaska) and Allways Rewards (Allegiant).

Alaska's main hubs are Seattle (SEA), Portland (PDX), San Francisco (SFO), Los Angeles (LAX), Anchorage (ANC). Allegiant's are Las Vegas (LAS), Orlando Sanford (SFB), St. Petersburg–Clearwater (PIE), Phoenix–Mesa (AZA). The best choice often comes down to which airline flies nonstop from your airport.

Which should you book?

Choose Alaska if you want…

a carry-on on its cheapest fare
a better on-time record
to earn and use oneworld miles and status
nonstops from SEA, PDX, SFO

Choose Allegiant if you want…

a bigger carry-on
cheaper checked bags
fewer cancellations
nonstops from LAS, SFB, PIE

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.