Mistake fares are accidental airline pricing errors that let savvy travelers fly for 50–90% less. Here's how to find them before they disappear.
What is a mistake fare?
Mistake fares happen when airlines, booking agencies, or fare aggregators publish tickets at prices far below their intended rate — due to currency conversion errors, missing fuel surcharges, fat-finger pricing mistakes, or system glitches. These fares can be 50% to 90% cheaper than the same route normally costs. A business class seat to Europe for $300. A round trip to Japan for $180. They're real, they get honored more often than not, and they disappear within hours.
A fare gets priced in one currency and incorrectly converted to another — often at the wrong decimal point. These are among the most dramatic mistake fares, sometimes off by 10x or more.
Airlines sometimes publish a fare without the fuel surcharge applied. On long-haul international routes, this can shave $300–$800 off the ticket price instantly.
A human enters $1,400 as $140, or a $900 fare as $90. It happens more than airlines admit. These errors go live on booking sites before anyone catches them.
Automated fare pricing systems can misfire during updates or integrations, briefly publishing routes at broken prices. These often affect entire routes for a short window.
Real examples
These are real mistake fares that travelers booked and flew. Airlines honored most of them.
Business class seats accidentally priced at economy rates due to a currency error. Lasted about 4 hours before being corrected.
A missing fuel surcharge on a major carrier's pricing system. Thousands of travelers booked before it was pulled.
Fat-finger error during a seasonal sale upload. The airline honored all tickets booked during the 6-hour window.
A third-party agency incorrectly loaded the fare without taxes. The airline still honored every booking made during the window.
A transatlantic business class mistake fare that stayed live for nearly 12 hours over a weekend before the airline noticed.
A system integration error during a GDS update. All tickets issued during the error window were honored by the carrier.
Step by step
Speed is everything with mistake fares. Here's the process that gives you the best chance of locking one in.
Mistake fares disappear within hours — sometimes minutes. Set up price alerts on Aviasales for your most-traveled routes so you're notified the moment a fare drops unusually low.
When you spot a price that seems too good to be true, book it first and research it second. A mistake fare that disappears while you're deciding is gone for good. You can always cancel within 24 hours if needed.
Make sure you receive a full booking confirmation email with a ticket number — not just a booking reference. A confirmed ticket number is what the airline must honor, even after correcting the fare.
Give the airline 24–48 hours to either honor or cancel the ticket. Most honor mistake fares quietly. If they cancel, DOT regulations in the US require a full refund — so you never lose money on a mistake fare.
Once the airline confirms the ticket, book refundable accommodations through Expedia or Trip.com. Keep everything refundable until you know the airline has locked in your seat.
Even after confirmation, add EKTA travel insurance to cover the trip. Policies issue in minutes. For an already-discounted fare, coverage costs almost nothing relative to the savings.
Search flights now
Search now and compare hundreds of airlines — unusually low fares stand out immediately when you see live pricing.
Pro tips
The habits that frequent mistake fare hunters use to catch deals before they vanish.
Airline pricing systems update most frequently mid-week. Mistake fares caused by system updates or new fare loads are most likely to appear Tuesday through Wednesday.
Mistake fares don't appear on the dates you want. Set alerts for your target routes broadly and be ready to adjust your travel dates when a deal appears.
In the US, airlines are required to honor mistake fares that were issued with a ticket number. Even if they don't, DOT rules require a full refund — you never lose money on a mistake fare booking.
When calling to confirm your booking, never reference the price being unusual. Simply confirm your itinerary and ticket number. The less attention drawn to the fare, the better.
Premium cabin mistake fares occur more than economy ones because the pricing is more complex. A business class mistake fare can represent $2,000+ in savings on a single long-haul ticket.
Occasionally a mistake fare appears on a route that also has hidden city potential. FareFinderAI covers both — check our hidden city flights guide for the full breakdown.
Common questions
FareFinderAI brings together the best fare search tools — free to use, no account required.
✈ Search Flights on FareFinderAIFareFinderAI contains affiliate links. We may earn a commission if you book through our links at no extra cost to you. All tools featured are independently selected based on our testing and research.