WestJet UltraBasic: a cabin-size bag may still be outside your allowance
WestJet’s ordinary carry-on size is 56 × 23 × 36 centimeters, but fitting that size does not create entitlement under UltraBasic. The airline does not present a simple carry-on add-on as a universal UltraBasic solution. Check your fare and every segment before deciding what to pack. When relying on Extended Comfort, verify that the required flights in that direction qualify. Compare checking a bag with an eligible fare or seating option using the current booking quote rather than assuming a fee at the gate will be equivalent. Measure the personal item separately and keep it within the applicable under-seat allowance. Review the return journey independently if its fare or seating differs. Save confirmation of any purchased change, then check the updated baggage entitlement. Do not use a standard cabin-size label on a suitcase as evidence that your ticket includes it.

Important unknowns
- WestJet UltraBasic carry-on entitlement and stated exceptions; price and partner handling not determined.
More booking questions
Match the booking and the bag
Check your fare and every segment before deciding what to pack. When relying on Extended Comfort, verify that the required flights in that direction qualify. Compare checking a bag with an eligible fare or seating option using the current booking quote rather than assuming a fee at the gate will be equivalent.
Checked againstBaggage
Confirm before travel or payment
Measure the personal item separately and keep it within the applicable under-seat allowance. Review the return journey independently if its fare or seating differs. Save confirmation of any purchased change, then check the updated baggage entitlement. Do not use a standard cabin-size label on a suitcase as evidence that your ticket includes it.
Checked againstBaggage