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WestJet’s carry-on rules are straightforward, but there are two details worth knowing before you pack: WestJet measures bags using a sizing device (so exterior dimensions matter), and the UltraBasic fare changes what you’re allowed to bring onboard. Below is the quick cheat sheet, then the details.
WestJet carry-on rules at a glance
If you only read one section, make it this one—these are WestJet’s published size limits, the UltraBasic restriction, and what to expect on weight and liquids.
- Standard carry-on (overhead bin): 22″ x 14″ x 9″ (56 x 36 x 23 cm), measured by WestJet’s sizing device (exterior size, wheels included if applicable)
- Personal item (under the seat): 16″ x 13″ x 6″ (41 x 33 x 14 cm), must fit under the seat in front of you
- UltraBasic (important): 1 personal item only on most routes; no carry-on unless you meet a stated exception
- Carry-on weight limit: No published numeric limit—your carry-on must be light enough to lift into the overhead bin without assistance
- Liquids (Canada departures): CATSA’s 100 mL containers in a 1 L clear bag rule applies (for a plain-English overview, see my TSA liquids rule guide)
- For comparisons across airlines, keep my carry-on size by airline guide bookmarked.
WestJet carry-on bag size limit
WestJet’s maximum carry-on size is:
- 22″ x 14″ x 9″ (56 x 36 x 23 cm)
WestJet’s policy is built around a sizing device at the airport. If your bag doesn’t fit, WestJet treats it as checked baggage and you may be charged a checked bag fee plus a service fee at the gate.
A simple way to avoid surprises
Measure your bag fully packed, using the outside dimensions—including wheels, handles, and any stuffed exterior pockets. That’s the version of the bag that has to fit the sizer.
WestJet personal item rules (under-seat bag)
In addition to your carry-on (on most fares), WestJet allows one personal item that must fit under the seat.
WestJet personal item size limit
Your personal item must not exceed:
- 16″ x 13″ x 6″ (41 x 33 x 14 cm)
This is the bag where I’d keep anything you’d hate to be separated from if your carry-on gets gate-checked (medication, keys, chargers, laptop, travel documents).
WestJet UltraBasic: when a carry-on is NOT allowed
This is the biggest “don’t miss it” section.
WestJet states that UltraBasic guests may bring one personal item only, and UltraBasic guests cannot bring or pay for a carry-on bag except in specific cases, including:
- Certain Europe and Asia itineraries (where WestJet allows one carry-on + one personal item), and/or
- When Extended Comfort has been purchased for all flights in one direction (including connections)
If an UltraBasic guest arrives at the gate with a carry-on bag and doesn’t meet an exception, WestJet states the bag will be required to be checked and will be subject to fees.
WestJet carry-on weight limit
WestJet does not publish a numeric carry-on weight limit. Instead, the policy is practical: your carry-on must be light enough to place in the overhead bin without assistance.
If you’re packing heavy items (dense shoes, books, camera gear), keep the carry-on manageable. On smaller aircraft (like WestJet Encore), you may also be asked to check a carry-on even if it fits.
WestJet Carry-On Weight Limit
As a rule, WestJet doesn’t impose weight restrictions on a carry-on bag. The only rule they have is that it must be light enough that you can store it in the overhead bin unassisted. Your smaller, personal items should be stowed under the seat in front of you.
My Favorite Carry-On Bag for WestJet
From the two bags I use, the better match for WestJet’s carry-on size limit is the Travelpro VersaPack Spinner 20″. WestJet’s overhead maximum is 22″ x 14″ x 9″, and this bag’s overall dimensions are designed to fit that exact “standard carry-on” footprint.
Manufacturer dimensions:
- Overall dimensions (includes wheels and carry handles): 22″ H x 14″ W x 9″ D
- Case dimensions (the main body): 19.75″ H x 13.25″ W x 8.5″ D
Why I like it specifically for WestJet
WestJet uses a sizing device, so I prefer a bag that fits the published dimensions without needing “close enough” judgment calls. I still keep it unexpanded if I’m packing tight, because overstuffed pockets are what usually push a bag from “fits” to “gate-check.”
Case Dimensions:
- H: 19 in. W: 15 in. D: 7.75 in.
- Weight: 7.3 lbs.
Fits 80% of International Airlines* as a Carry-On
WestJet liquids policy for carry-ons
For flights departing Canada, CATSA regulates liquids, aerosols, and gels at the security checkpoint. The core rule most travelers need:
CATSA liquids rule (quick version)
- Containers must be 100 mL / 100 g (3.4 oz) or less
- All containers must fit in one clear, closed, resealable 1 L (1 qt) bag
- One bag per traveler, and you should remove it at screening
If you’re departing from a U.S. airport, TSA screening rules apply instead.
Here is a list of common items that are classified as Liquids, Aerosols and Gels:
| Liquids | Aerosols | Gels |
| · coffee | · hairspray | · lip gloss |
| · soft drinks | · body spray | · hair styling gel |
| · juice | · static remover | · jam |
| · bottled water | · sunscreen spray | · jelly |
| · maple syrup | · shaving cream | · pudding |
| · alcohol | · aerosol deodorant | · yogurt |
| · shampoo | · aerosol cheese strings | · gelatin |
| · conditioner | · mashed potatoes | |
| · mouthwash | · peanut butter | |
| · toothpaste | · chocolate spread | |
| · perfume | · cheese spread | |
| · cologne | · maple spread | |
| · liquid soap | · shaving gel | |
| · insect repellent | · gel-based deodorant | |
| · liquid/gel based hand sanitizers | · gel-based cosmetics (e.g. gel blush, gel lip products) | |
| · creams/lotions | ||
| · hairspray | ||
| · liquid based cosmetics (e.g. mascara, liquid foundation, liquid eyeliner) |
Exceptions to this rule are certain medications and baby food/child nourishment.
Flying with Pets
If you are going to bring a pet on board with you, it must be able to fit in a small, ventilated pet carrier that fits under the seat in front of you. Pets in cabin kennels will count as your one carry-on item. In addition to the kennel, you can bring one personal item onboard the aircraft.
If you are bringing your pet with you, make sure you follow CATSA’s pet policy and have an approved Pet Carrier that conforms to WestJet’s pet policy.
Features mesh panels so your pet can breathe easily, a non-slip shoulder strap, locking zippers, and a rear storage pocket for treats and other goodies.
Approved for use on most major airlines and the small and medium sizes are included in Sherpa's exclusive Guaranteed on Board program.
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The carry-on you suggested has overall dimensions of (according to Amazon) 23″ x 14″ x 9″ including wheels and handles. Wouldn’t the 23″ height mean that it doesn’t fit? Have you actually tested this carry-on in the bag sizer? According to Westjet’s website the carry-on can’t be longer than 21″ including wheels and handles, my current carry-on measures 22″ x 14″ x 9.5″ including wheels and handles, so I’m looking for a carry-on that will work.
Hi there,
Will a Cary-on Cabin Case be permitted with the following maximum size :- 54 x 34.5 x 20 (cm’s)
WestJet, Newcasle (UK)to Calgary (CAN) and return
Hi Raymond – While I can’t guarantee it, I would think you will be fine with this bag, especially since your bag is smaller in the other two dimensions.
Good morning,
I’m actually wanting to know if someone can tell me what the size of a check in luggage needs to be. I know that the website says that it can’t supersede 50 pounds or 62 inches (in total), but I don’t know what that means when it comes to length, width and depth size. Can someone please clarify
Hi – the dimension limit is 21x9x15 inches