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

Alaska: 22 × 14 × 9 in (56 × 36 × 23 cm). WestJet: 53 × 38 × 23 cm (20.9 × 15 × 9.1 in).

Are Alaska and WestJet partners?

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

AS vs WS · 2026 comparison

Alaska vs WestJet

Q: Do Alaska and WestJet include a carry-on on basic economy?

Alaska: Saver fares include a carry-on and a personal item. Checked bags cost extra. WestJet: UltraBasic fares include only a personal item on most routes.

Alaska wins on a carry-on on its cheapest fare; WestJet doesn't clearly win any category. 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 1 category

A carry-on on its cheapest fare

WestJet

No clear category wins

Quick verdict

Alaska wins on a carry-on on its cheapest fare; WestJet doesn't clearly win any category. Check the cheapest fare's bag rules before you compare prices.

Carry-on size: Alaska: 22 × 14 × 9 in · WestJet: 53 × 38 × 23 cm
Carry-on on the cheapest fare: Alaska: Included on every fare · WestJet: Not on some basic fares
First checked bag (regular economy): Alaska: $45 · WestJet: $32

Side by side

	Alaska	WestJet
Bags
Carry-on size	22 × 14 × 9 in	53 × 38 × 23 cm
Carry-on on the cheapest fare	Included on every fare	Not on some basic fares
Carry-on weight limit	None published	None published
Personal item	Must fit under the seat	41 × 33 × 15 cm
First checked bag (regular economy)	$45	$32
Network
Alliance	oneworld	None
Loyalty program	Atmos Rewards	WestJet Rewards
Main hubs	SEA, PDX, SFO, LAX, ANC	YYC, YYZ, YVR

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 WestJet up to 53 × 38 × 23 cm (20.9 × 15 × 9.1 in).

Alaska includes it on every fare, while WestJet's UltraBasic can be personal-item only.

Neither publishes a carry-on weight limit.

Personal items: anything that fits under the seat on Alaska, and 41 × 33 × 15 cm (16.1 × 13 × 5.9 in) on WestJet.

A first checked bag on Alaska costs $45 on flights within North America, and a first checked bag on WestJet costs $32 on flights within Canada and between Canada and the U.S..

Basic economy

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

WestJet (UltraBasic): UltraBasic fares include only a personal item on most routes.

Loyalty and where they fly

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

Loyalty programs: Atmos Rewards (Alaska) and WestJet Rewards (WestJet).

Alaska's main hubs are Seattle (SEA), Portland (PDX), San Francisco (SFO), Los Angeles (LAX), Anchorage (ANC). WestJet's are Calgary (YYC), Toronto (YYZ), Vancouver (YVR). 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
to earn and use oneworld miles and status
nonstops from SEA, PDX, SFO

Choose WestJet if you want…

nonstops from YYC, YYZ, YVR

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.