Carry-On Only: How to Pack Light and Skip Bag Fees on Canadian Flights

Travelling carry-on only is one of the easiest ways to keep a cheap fare cheap. On many Canadian routes the lowest fares now include just a personal item, so knowing exactly what fits, and how to pack it, can save you a bag fee each way. This guide covers the current fare rules, smart packing tactics and the liquids rules you need to clear security.

Key takeaways

• Basic fares are personal-item-only on many domestic, US and sun routes with Air Canada, WestJet and Porter. Flair charges for carry-ons on most fares.
• Measure your bag fully packed and compare it with your airline’s sizer using our carry-on checker.
• A 5–7 day trip fits in a personal item if you use soft luggage, layer clothing and keep toiletries small.
• CATSA’s liquids rule still applies at Canadian airports: 100 ml containers in one clear, resealable bag of about one litre.
• Add bags online, never at the gate, if you do need extra space.

Why carry-on only matters more in 2026

Over the past few years, the major Canadian airlines have unbundled their cheapest fares. Here is the general picture as of late 2026; always verify before you fly, because policies change.

Airline	Cheapest fare	What is typically included	Notes
Air Canada	Economy Basic	Personal item only on domestic, US, Mexico, Caribbean and Central America routes	Carry-on still included on other international routes; some elite and cardholder exemptions
WestJet	UltraBasic	Personal item only on domestic and transborder routes	Carry-on included on some transatlantic routes
Porter	PorterClassic Basic	Personal item only on North American routes	Carry-on can be added; included from Standard fares up
Flair	Base fare	Personal item only	Carry-on and checked bags cost extra, cheapest when added at booking
US carriers	Basic economy	Varies: some include a carry-on, some do not	United’s basic economy is the strictest on many routes

The gap between a basic fare and the next fare up often roughly equals one bag fee. If you can travel with a personal item alone, the basic fare is usually the better deal. For more on how each Canadian carrier prices extras, see our Canadian budget airlines guide.

Personal item vs carry-on: know the difference

A personal item must fit under the seat in front of you. Most airlines set limits around 40 to 43 cm long, 33 cm high and 15 to 16 cm deep, with wheels and handles included.

A carry-on goes in the overhead bin. Typical limits are around 55 x 40 x 23 cm, plus a weight limit on some airlines.

Exact sizes differ by airline and change from time to time, so check the current numbers with our carry-on size checker before you buy a new bag.

Heads up: Low-cost carriers are known for strict sizers at the gate. If your personal item does not fit, it can be reclassified as a carry-on or checked bag at a higher gate price.

Personal-item tactics that actually work

• Choose a soft backpack sized to the smallest personal-item limit you are likely to meet. Soft sides squeeze into sizers; hard shells do not.
• Wear your bulkiest items. Boots, a jacket and a sweater on your body free up a surprising amount of room.
• Use compression cubes for clothing and a flat pouch for documents and chargers.
• Plan outfits around one colour palette so everything mixes and matches.
• Do laundry on the road. A small sink-wash kit means you can pack for four days and travel for ten.
• Skip “just in case” items. Toiletries and basics are easy to buy at most destinations.

Pro tip: Pack the night before, then remove three items. Most people overpack by about that much, and the bag will close more easily at the gate.

A 5–7 day carry-on packing list

Clothing

• 3–4 tops in mix-and-match colours
• 1–2 pairs of pants or shorts (wear the heavier pair)
• 1 light layer (fleece or cardigan) and one packable rain shell
• 4–5 sets of underwear and socks (quick-dry fabrics help)
• 1 pair of versatile shoes plus the pair you wear
• Sleepwear and, for sun trips, a swimsuit

Toiletries (liquids in your one-litre bag)

• Travel-size toothpaste, sunscreen, moisturizer and contact lens solution
• Solid shampoo, conditioner and soap bars to save liquid space
• Razor, toothbrush, deodorant (stick versions are not liquids)

Tech and documents

• Phone, charger and one universal adapter
• Power bank (cabin only)
• Passport, printed or digital boarding pass, travel insurance details

Packing for winter trips carry-on only

Winter travel in Canada is the hardest test for a small bag, but it is still possible:

• Wear your heaviest layers on the plane: winter coat, boots and a warm sweater.
• Choose merino or synthetic base layers, which are warm, compact and can be worn several times between washes.
• Pack one versatile mid-layer instead of several bulky sweaters.
• Stuff hats, gloves and scarves into coat pockets once you are through security.
• Leave ski gear for rental at the destination unless you are a frequent skier; rental often costs less than checking a bulky bag both ways.

For a sun escape from a Canadian winter, the challenge is the opposite: your coat. Some travellers leave it in the car at the airport or wear a packable down jacket that compresses into its own pocket.

Liquids: CATSA’s 100 ml rule

At Canadian airports, CATSA screening rules limit liquids, aerosols and gels in carry-on bags:

• Each container must be 100 ml or less, even if it is only partly full.
• All containers must fit in one clear, closed, resealable plastic bag of about one litre, one bag per passenger.
• Medications, baby formula, breast milk and baby food are allowed in larger, reasonable quantities but must be declared at screening.

Some airports abroad have new scanners that relax liquids rules, but you will still face 100 ml limits on Canadian departures and on many return and connecting flights. Confirm the current rules on the CATSA website (catsa-acsta.gc.ca) before you fly.

Example: A three-tube combo of sunscreen, toothpaste and moisturizer at 100 ml each, plus solid shampoo and stick deodorant, easily covers a week at a resort without crowding your liquids bag.

Batteries and other cabin rules

Spare lithium batteries, power banks and e-cigarettes must stay in the cabin, never in checked luggage. Several airlines have also restricted using or charging power banks during the flight, so check your airline’s current policy. For specific items such as tools, sporting goods or food, use CATSA’s “What can I bring?” search.

Avoiding gate-check surprises

• Board on time. Late boarding groups are the first to lose overhead bin space.
• Keep your bag compliant. On full flights, airlines often gate-check compliant carry-ons for free, but non-compliant bags can trigger fees.
• Add bags online if needed. Most airlines charge less when you add a bag at booking or in Manage Booking than at check-in or the gate.

When checking a bag is smarter

Carry-on only is not always the best choice. Long trips, ski or golf gear, travel with young children and trips involving duty-free shopping can justify a checked bag. Some co-branded airline credit cards also include a free first checked bag for the cardholder and companions; our travel credit cards guide explains which perks are worth it.

If you travel light, you can also take advantage of cheaper one-way or self-transfer itineraries, covered in our advanced booking hacks guide. And to hear about basic-fare sales the moment they launch, sign up for CheapFly deal alerts.

Bottom line

On many Canadian routes, packing to personal-item size is the single easiest way to protect a cheap fare. Measure your bag, plan your liquids around the 100 ml rule and add any extra bags online rather than at the gate. Light travel also makes every other money-saving strategy easier.