Your meeting ends three hours early. The wedding you flew in for wrapped up at noon. Or you simply got to the airport at 11am for a 7pm flight and realized there are four earlier departures sitting on the board. The question is always the same: can I just get on one of those?
Key takeaways
- Air Canada is the only large Canadian carrier with free same-day airport standby, on every cash fare except Economy (Basic), and lower fare brands are limited to a few high-frequency corridors.
- WestJet has no public standby waitlist; flex fares waive the change fee, and every change must be made more than 2 hours before departure.
- Porter accepts same-day changes online or through an agent up to one hour before departure, except on Basic fares.
- Flair allows no changes inside 24 hours of departure, even with the TravelFlex add-on.
- “No change fee” still means paying the fare difference, so always compare the change quote against the price of a new one-way ticket.
Sometimes yes, sometimes for free, and sometimes for more than the original ticket cost. It depends almost entirely on which airline you booked and which fare you clicked. Canadian carriers handle the day of departure in genuinely different ways, and none of them explain it clearly at the moment you are buying.
Here is how it works in practice, as of August 2026.
Two different things, often confused
People use “same-day flight” to mean two unrelated situations, and mixing them up is where most of the confusion starts.
The first is booking a ticket for today, from scratch, because you need to be somewhere. That is a pricing question, and the answer is usually unpleasant. Day-of inventory sits in the highest fare buckets an airline has open.
The second is moving a ticket you already hold onto an earlier or later flight on the same calendar day. That is a policy question, and the answer ranges from free to expensive depending on your fare brand.
This post is mostly about the second. If you are in the first situation, our last-minute board is refreshed through the day and is the faster place to start.
Air Canada: standby is free, but only for some fares and some routes
Air Canada is the only large Canadian carrier that still runs a proper free standby waitlist for regular paying passengers. It is called same-day airport standby, and it lets you waitlist for an earlier flight between the same two cities at no extra charge.
The eligibility rules are the catch, and they are layered. According to Prince of Travel’s guide to the feature and Milesopedia’s walkthrough, every cash fare except Economy (Basic) is eligible in some form, but the lower fare brands are restricted to a handful of high-frequency corridors: Toronto, Montreal and Ottawa; Vancouver, Edmonton and Calgary; and Toronto to the New York airports. Buy Economy (Comfort), Economy (Latitude) or a flexible premium fare and standby opens up across the network. Buy Economy (Basic) and you are locked to the flight you booked.
Two operational details matter more than the fare chart. Standby is not available once you have checked a bag, so if you think you might want an earlier plane, travel with carry-on only. And the waitlist does not clear until check-in closes for the flight you are chasing, which as of August 2026 is 60 minutes before departure on nearly every flight, a deadline Air Canada standardized in September 2024, with a shorter cutoff only at Billy Bishop Toronto City Airport. You have to be standing at that gate to collect a boarding pass, and once you clear, you are off your original flight for good.
Separately from standby, Air Canada allows most bookings made on aircanada.com to be changed online up to two hours before departure. That is a confirmed seat rather than a gamble, but it is priced as a change, which brings us to the part everyone underestimates.
WestJet: you buy the change, you do not wait for it
WestJet‘s approach is the opposite. There is no free public standby waitlist to join. Day-of flexibility is a product you either bought at booking or pay for at the airport.
On WestJet’s own fares page, the flex brands (EconoFlex, PremiumFlex and BusinessFlex) waive the change fee entirely and charge only the difference in fare. Econo, Premium and Business each carry a change fee on top of any fare difference. UltraBasic sits outside all of it: no changes at all unless you act within 24 hours of booking, and no refunds.
Two timing rules from WestJet’s change and cancellation policy matter on the day itself. Any change has to be made more than 2 hours before departure, full stop. And the same-day change that Gold and Platinum members get for free comes with carve-outs: it is not available on charter flights, on the only or last flight of the day, or on bookings with overnight connections. If you were counting on jumping to the last departure of the evening, that door is closed by design.
The UltraBasic footnote deserves a second read if you have status. WestJet’s fine print states that Platinum and Gold members lose their same-day flight change benefit, their complimentary upgrades and their free seat changes when the ticket is UltraBasic. Elite status does not rescue the cheapest fare. If day-of flexibility is the reason you hold the tier, the fare you book has to be Econo or better.
For the broader fee-by-fee picture between the two big carriers, we put the 2026 numbers side by side in WestJet vs Air Canada.
Porter: generous online, then a hard cutoff
Porter sits somewhere in between Air Canada and WestJet, and it is the most quietly useful of the three big carriers if you fly its routes.
Per Porter’s own booking FAQ, most reservations made directly with Porter can be changed online on the day of departure. If the online option is not available, the call centre or an airport agent can process it, and changes are accepted up to one hour before scheduled departure. That one hour window is later than Air Canada’s two hour online cutoff and later than most people assume.
Basic fares are the exception again. Porter treats them as non-changeable, though the airline notes that changes may sometimes be made at the airport for a fee, subject to seat availability, with the same origin, destination and travel date. And as with Air Canada, if your bag has already gone down the belt, the same-day change path closes.
Flair: decide the day before, or not at all
If your ticket is on Flair, there is no same-day option to plan around. Per Flair’s flight changes page, changes through My Trips are allowed only up to 24 hours before departure, and the fee schedule ends with a blunt line for the 0 to 24 hour window: no changes allowed. The TravelFlex add-on waives one change fee, but it does not move that cutoff. Once you are inside the final day, your Flair ticket is the flight it is, and the only way onto an earlier plane is a brand-new ticket.
The quick comparison
| Free standby to an earlier flight | Paid same-day change | Cheapest fare excluded | Day-of cutoff | |
|---|---|---|---|---|
| Air Canada | Yes, on eligible fares (corridor limits on lower brands) | Yes, priced by fare brand | Economy (Basic) | Online changes to 2 hours out; standby clears at check-in close |
| WestJet | No public standby waitlist | Yes, free on flex fares plus fare difference | UltraBasic | Changes must be made more than 2 hours before departure |
| Porter | No | Yes, online or via agent | Basic | 1 hour before departure, online or via agent |
| Flair | No | No, changes end 24 hours before departure | All fares inside 24 hours | 24 hours before departure |
Fees and fare rules change. Confirm the current terms with the airline before you count on any of this.
The fare difference is the part that bites
Here is the trap that catches people who did everything right and still ended up several hundred dollars poorer.
“No change fee” is not the same as “free change.” On a flex fare you still pay the difference between what you paid and the cheapest seat available on the new flight, right now. On the morning of departure, the cheapest available seat is rarely cheap. A $189 Econo ticket bought six weeks out can meet a $540 walk-up bucket on the flight two hours earlier, and the flex fare you bought for flexibility just quoted you $351 to use it.
Standby avoids this entirely, which is the real argument for Air Canada’s version. You are not repricing the ticket. You are asking to occupy an empty seat on a plane that is leaving anyway.
Before you accept a change quote, open a fresh search for that exact flight and see what a brand-new one-way costs. On competitive domestic routes, and especially where an ultra low cost carrier operates, a new ticket occasionally comes in under the change quote. Our Flair Airlines review covers what you give up when you go that route, and you can price the alternatives on any given day through flight search.
Five habits that make this work
Travel carry-on only when your plans might move. This single decision preserves your options at Air Canada and Porter both. A checked bag is a commitment.
Decide before you leave for the airport. Air Canada’s online change window shuts two hours before departure. Porter’s agent window shuts one hour out. The cheapest and easiest versions of every one of these processes happen while you are still at home.
Check the seat map of the flight you want. A flight showing a wall of open seats is a good standby bet. One showing four scattered middles is not. This is free intelligence and it takes ten seconds in the app.
Do not clear standby and then wander off. Once your name clears and a new boarding pass is issued, you are removed from the original flight. Stay at the gate.
Buy the fare that matches your certainty. The cheapest fare is the right choice when your plans are fixed. It is the wrong choice when they are not, and the gap only shows up on the day you need to move.
FAQ
Can I fly standby on WestJet as a regular passenger? WestJet does not publish a free standby waitlist for the general public the way Air Canada does. Its day-of flexibility comes through same-day changes, which are included on the flex fares and charged as a fee on the standard ones. UltraBasic tickets cannot be changed at all outside the 24 hour window after booking.
Does having elite status get me on an earlier flight for free? It helps, but it does not override the fare. With Air Canada, status improves your position on the standby waitlist rather than granting eligibility. With WestJet, Platinum and Gold same-day change benefits are explicitly unavailable on UltraBasic fares. The ticket you bought sets the ceiling.
Is it cheaper to change my flight or just buy a new one? Check both, every time. A change on a non-flex fare means a change fee plus the fare difference at today’s prices, and on a busy route that total can exceed a fresh one-way. Compare the change quote in the airline app against a live search before you confirm anything.
Policies quoted here reflect what the airlines published as of August 2026. Fare rules, fees and eligibility change without much notice, so verify the current terms with the airline before you book or before you count on moving your flight.