Canada’s major airlines are close to each other on carry-on size, but not identical, and the differences matter if you are buying one bag to use across several carriers. The table below is generated from the same data that powers our airline baggage rules pages and Bag Finder, so it always matches them.
The limits side by side
| Airline | Carry-on (cm) | Carry-on weight | Personal item (cm) | Source confidence |
|---|---|---|---|---|
| Air Canada | 55 × 40 × 23 cm | 10 kg | 43 × 33 × 16 cm | Sources agree |
| WestJet | 53 × 38 × 23 cm | 10 kg | 41 × 33 × 15 cm | Check first |
| Porter Airlines | 55 × 40 × 23 cm | 10 kg | 43 × 33 × 16 cm | Check first |
| Flair Airlines | 55 × 40 × 23 cm | Not stated | 43 × 33 × 15 cm | Sources conflict |
| Air Transat | 55 × 40 × 23 cm | Not stated | 43 × 31 × 13 cm | Check first |
Figures are as listed in published guides when we last reviewed them. Airlines can change limits, and sources sometimes disagree. Always confirm the allowance shown in your booking before you fly. Use our pre-flight checklist before leaving home.
Where the airlines differ
The big carriers cluster around a 55 × 40 × 23 cm carry-on and a 43 × 33 × 16 cm personal item. The differences show up at the edges:
- WestJet reduced its carry-on size in 2025, so older guides quote a larger bag than the current limit.
- Air Transat lists a thinner personal item than Air Canada, so a bag that works at one may not at the other.
- Flair sells allowances separately on many fares, and published sources disagree on weight, so check the booking flow itself.
Buying one bag for several airlines
If you fly several Canadian carriers, aim for the smallest limit on any airline you use. As of our review, that points to a carry-on near 53 × 38 × 23 cm including wheels and handles. That is small for a hardside spinner, which is why many travellers choose a softside or a backpack for WestJet routes.
Two practical routes:
- A slim softside such as the , kept zipped flat.
- A carry-on-size backpack such as the , packed so it holds its shape.
Weight limits
Several Canadian airlines list a carry-on weight limit around 10 kg, but the listed numbers vary between sources and some airlines do not publish a figure at all. Weigh your packed bag at home with a luggage scale and confirm the number with the airline. European airlines can be stricter: Lufthansa’s limit for a cabin bag is much lower than the Canadian norm.
Fares matter as much as size
Whether a carry-on is included depends on the fare. The cheapest fares on several airlines include only a small personal item, and a full-size carry-on is a paid add-on. Read the fare conditions at booking, and buy the add-on online when possible because it is usually cheaper than at the gate.
A quick pre-flight checklist
- Open the airline’s own baggage page and confirm the limits for your route and fare.
- Measure the packed bag using our how to measure a carry-on bag the way an airline does.
- Weigh it.
- Run it through the Bag Finder if you are still shopping.
Frequently asked questions
Which Canadian airline has the smallest carry-on limit?
In the figures we reviewed, WestJet’s current carry-on limit is the smallest of the major Canadian carriers. Confirm on WestJet’s site because the rule changed recently.
Is a backpack a personal item or a carry-on?
It depends on size and fare. A small backpack that fits under the seat is a personal item; a 35–40 litre travel pack is usually a carry-on. See our guide to personal items versus carry-ons.
Do Canadian airlines enforce the sizer?
Practice varies by airline, airport and flight load. Do not plan around leniency.
Why do sources disagree?
Airlines have changed some limits recently and many blogs are not updated. We list a confidence level for each airline on its page.
Information here is general and can go out of date. Confirm airline rules with the airline before you travel. See our methodology.
