Error Fares and Mistake Fares: How Canadians Can Catch Them

An error fare, also called a mistake fare, is a ticket price published by accident that sits far below what the airline meant to charge. They can be spectacular, such as long-haul flights for the price of a domestic hop, but they disappear quickly and aren’t always honoured.

This guide explains where error fares come from, how to spot and catch one from a Canadian airport, the etiquette that gives your ticket the best chance of surviving, and what Canadian rules say about airlines cancelling them.

Key takeaways

• Error fares come from human typos, missing surcharges, currency slips and technical glitches in fare filing or booking systems.
• They typically last minutes to hours, so speed matters more than anything else.
• Book first, plan later: avoid non-refundable hotels and tours until the ticket looks safe.
• Never call the airline to “confirm” a mistake fare.
• In Canada, an airline can generally cancel a fare that was obviously a mistake, but it should refund you and notify you promptly.

What causes an error fare?

Airfares pass through several systems before you see them: airline pricing teams file fares, distribution systems combine them with taxes and surcharges, and booking sites display the result. A slip at any step can produce a mistake.

Common causes include:

• Human typos. A pricing analyst enters a fare with a missing digit or in the wrong field.
• Missing surcharges. Some long-haul fares are built from a base fare plus a large carrier surcharge. If the surcharge drops off, the price can collapse.
• Currency errors. A fare filed in one currency gets displayed or converted as if it were in another.
• Fare-construction glitches. Unusual routings or combinations of fares produce a total the airline never intended.
• Cabin mix-ups. A premium cabin is accidentally priced like economy.

Error fare, flash sale or just a good deal?

Not every surprisingly low price is a mistake. Knowing the difference helps you decide how cautious to be.

Type	What it looks like	How long it lasts	Likely to be honoured?
Normal sale	Modestly lower prices across many dates	Days to weeks	Yes
Flash sale	Steep discount announced by the airline	Hours to a few days	Yes
Unpublished or hidden deal	Good price found only through specific dates or sites	Varies	Usually
Error fare	Price wildly below normal, often odd routings or cabins	Minutes to hours	Sometimes

If an airline is promoting the price, it’s a sale and you’re safe. If nobody is advertising it and the price looks impossible, treat it as a possible error.

How to spot one

Signs that a fare might be a mistake:

• It’s a fraction of the normal price for the route and season, not just a bit lower.
• Business or premium economy is priced near or below economy.
• The price only appears on one booking site, in one currency or for one point of sale.
• The routing is oddly convoluted, or the fare breakdown shows a missing or tiny surcharge.

You’ll only recognize an outlier if you know what normal looks like. Our complete playbook for finding cheap flights includes typical fare ranges by route type to use as a baseline.

How to catch error fares

Error fares reward people who are already watching. A few habits make the difference:

1. Follow deal alerts. Most travellers learn about error fares from alert services rather than finding them personally. Sign up for CheapFly’s free deal alerts to hear about unusual fares from Canadian airports.
2. Keep your passport and payment details handy. Saved traveller profiles on airline and booking sites can shave valuable minutes off checkout.
3. Be flexible. Error fares often work only on specific dates, so the people who benefit most can travel on short notice or at odd times.
4. Know your search tools. Fare calendars and map views make it easy to check other dates quickly once a fare is reported. Our Google Flights and fare tools tutorial walks through the key features.
5. Book with a credit card. If the ticket is cancelled and a refund stalls, a credit card gives you a dispute option.

Pro tip: If the fare is available both on the airline’s website and an online travel agency, booking directly with the airline is usually cleaner if it cancels or changes the ticket later.

What to do after you book

The first days after booking are the riskiest. Follow these rules:

• Wait for the e-ticket number. A booking confirmation isn’t the same as an issued ticket. Check that a 13-digit ticket number appears in your booking.
• Don’t call the airline. Asking whether your fare is “really valid” can flag your ticket for review.
• Don’t book non-refundable extras yet. Hold off on prepaid hotels, tours and connecting flights for at least a week or two, or choose fully refundable options.
• Keep records. Screenshot the fare, the booking and any terms displayed at purchase.

Heads up: Travel insurance generally won’t cover your hotel or tour losses if an airline cancels a mistake fare. That’s why refundable bookings matter so much in the first few weeks.

Booking etiquette

The error-fare community relies on airlines tolerating occasional mistakes. Behaving well keeps it that way:

• Book only trips you genuinely intend to take, and don’t make dozens of speculative bookings.
• Don’t hold seats you can’t use; cancel early if your plans fall through.
• Accept a cancellation gracefully if it comes. Arguing with front-line agents rarely helps.
• Don’t harass airline staff on social media about a pricing mistake.

Do airlines honour error fares? The Canadian picture

It varies, and there’s no rule forcing airlines to honour every mistake.

In Canada, the Canadian Transportation Agency (CTA) has dealt with this directly. In a well-known case involving fares sold at a tiny fraction of the normal price, the Agency sided with the airline that cancelled them. Its reasoning was that price is a fundamental term of the contract, so a fare so low that a reasonable person should have realized it was a mistake doesn’t create a binding deal. The Agency also signalled that airlines should tell affected passengers promptly, generally within about 72 hours of discovering the error.

Airlines’ own tariffs, the legal terms of carriage, often include language that lets them void a ticket sold at a fare quoted in error and refund the amount paid. Air Canada’s published tariff includes such a provision, and other carriers have similar terms. Check the airline’s tariff if you want the precise wording.

In the US, the Department of Transportation changed its enforcement approach in 2015 and stopped penalizing airlines for cancelling genuine mistake fares, provided they refund the ticket and reimburse reasonable out-of-pocket costs. Rules differ again in Europe and elsewhere.

In practice, outcomes range from fully honoured tickets, to cancellations with a refund, to the airline offering an alternative fare. Fares that are low but plausible are honoured more often than those that are absurdly low.

The Air Passenger Protection Regulations (APPR) cover delays, cancellations and denied boarding once you hold a valid ticket; they don’t require an airline to honour a pricing mistake. See our APPR compensation guide for what they do cover.

Example: Suppose a round trip from Montréal to Rome in business class shows up at roughly economy prices on one booking site. You book, wait for the ticket number, and only book refundable hotels. Two weeks pass with no cancellation notice, so you lock in the rest of the trip. If the airline had cancelled, you’d have lost nothing but time.

Are error fares worth chasing?

For flexible travellers, yes, as long as you treat them as a bonus rather than a plan. If you need specific dates, have a fixed budget for non-refundable extras or can’t handle the stress of a possible cancellation, you’re better served by ordinary sales, which are honoured and far more common.

Bottom line

Error fares are real, exciting and unpredictable. Watch for them through alerts, book fast with a credit card, wait before committing to the rest of the trip and keep your expectations realistic. When one sticks, it can be the best deal you’ll ever book; when it doesn’t, a refund means you’ve lost nothing.