WestJet carries a bag up to 41 × 33 × 15 cm free. Of the 12 common cabin sizes here, 1 fly free.
| Bag size | Verdict |
|---|---|
| 40 × 30 × 20 cm | paid fare only |
| 40 × 30 × 15 cm | flies free |
| 45 × 36 × 20 cm | paid fare only |
| 55 × 40 × 20 cm | too big |
| 55 × 40 × 23 cm | too big |
| 55 × 35 × 25 cm | too big |
| 55 × 40 × 25 cm | too big |
| 56 × 45 × 25 cm | too big |
| 56 × 36 × 23 cm | paid fare only |
| 50 × 40 × 20 cm | too big |
| 54 × 35 × 22 cm | paid fare only |
| 45 × 35 × 20 cm | paid fare only |
"Paid fare only" means the bag fits the cabin, but only on a fare that includes the full-size cabin bag — on the cheapest fare it would have to go in the hold.
Allowance read 19 August 2026 from the airline's own baggage page.
Allowances read 19 August 2026 from each airline's own baggage pages. Rules change with little notice — the airline's page is the authority on the day you fly.