In August 2019, Cathay Pacific accidentally sold premium economy tickets from Vietnam to North America for $675 — and then honored every single booking, including the ones smart travelers immediately upgraded to business class for an additional $200. That’s $875 for a lie-flat business class seat across the Pacific that normally costs $4,500. The airline lost an estimated $15 million. The travelers who caught it? They flew to New York in business class for less than an economy ticket would have cost.
Mistake fares happen more often than airlines want you to know, and the travelers who know where to look and how to book fast are flying luxury cabins at prices that make no economic sense. Here’s exactly how to find them and what to do when you do.
What Are Mistake Fares and Why Do They Happen?
Mistake fares are pricing errors that make flights drastically cheaper than intended — sometimes 50-90% below market rate. They happen for several reasons:
- Currency conversion errors: An airline prices a route in the wrong currency or uses an outdated exchange rate, creating tickets that are absurdly cheap when purchased in a different currency.
- Missing fuel surcharges: The base fare is correct, but the airline forgets to add mandatory taxes and surcharges, resulting in $200 transatlantic business class tickets.
- Decimal point errors: Someone types $39.99 instead of $399.90. Multiply that across hundreds of seat inventory and suddenly business class to Asia is cheaper than a Greyhound bus.
- Routing errors: The algorithm prices a multi-segment ticket as if it’s a short domestic flight, creating situations where flying Los Angeles → London → Mumbai costs less than Los Angeles → Phoenix.
These errors are usually live for anywhere from 30 minutes to 12 hours before the airline catches and fixes them. The window is short, which means you need to know where to look and be ready to book immediately.
Where to Actually Find Mistake Fares
Mistake fares don’t show up on Google Flights or Kayak with a big red banner saying "ERROR PRICE!" You need to be plugged into communities and services that monitor airline pricing 24/7 and alert subscribers the moment something breaks.
Secret Flying (SecretFlying.com)
Free service that posts mistake fares, error pricing, and legitimately great deals multiple times per day. They cover routes worldwide and clearly label whether something is a mistake fare (might not be honored) or just an excellent sale price (will definitely be honored). Sign up for email alerts or follow them on Twitter for real-time notifications.
Scott’s Cheap Flights (now "Going")
Paid service ($49/year for economy deals, $99/year for premium economy and business class alerts) that sends curated flight deals to your inbox. They vet every deal, provide context on whether it’s bookable, and move fast. When a genuine mistake fare hits, Going subscribers often get the alert within minutes.
FlyerTalk Forums – Mileage Runs and Mistake Fares Section
The FlyerTalk community is obsessive about finding and documenting mistake fares. The forum moves fast when something breaks, with users posting booking confirmations, data points on whether the airline is honoring tickets, and strategies for maximizing the error. It’s free, but you need to check frequently because these threads move in real-time.
The Flight Deal (TheFlightDeal.com)
Another free aggregator that posts error fares alongside normal deals. They’re fast, cover routes from every U.S. gateway, and provide booking links directly to the airline or OTA showing the price.
Twitter Accounts to Follow
Several accounts exist solely to tweet mistake fares the moment they’re discovered: @SecretFlying, @TheFlightDeal, @Airfarewatchdog, and @FlyerTalk. Enable mobile notifications for these accounts and you’ll get pinged in real-time when something breaks.
How to Actually Book a Mistake Fare (and Maximize Your Chances It Gets Honored)
Finding the fare is step one. Booking it correctly is step two. Here’s what experienced mistake fare hunters do:
Book Directly With the Airline (Usually)
Most mistake fares are more likely to be honored if booked directly through the airline’s website rather than through an OTA like Expedia or Priceline. Airlines have more control over their own bookings and often eat the cost to avoid PR nightmares. Third-party bookings are easier for airlines to cancel without backlash.
Exception: sometimes the mistake only appears on OTA sites due to how they pull and display airline data. In those cases, book where the price shows.
Complete the Booking Immediately
Do not hesitate. Do not comparison shop. Do not wait to ask your travel companion if the dates work. When you see a legitimate mistake fare, book it within minutes. Mistake fares get corrected fast — often within 1-3 hours, sometimes within 30 minutes. The longer you wait, the higher the chance the error gets fixed before you complete checkout.
Book Multiple Tickets if You’re Traveling as a Group
If you’re traveling with a partner or family, book each ticket in separate transactions. Airlines sometimes cancel entire bookings if they contain multiple passengers, but individual bookings are more likely to slip through. Yes, this means entering your credit card information four times. Do it anyway.
Use a Credit Card With Strong Purchase Protection
If the airline cancels your ticket, you want a credit card that will fight the charge on your behalf if the airline tries to re-charge you at the correct fare. Cards like the Chase Sapphire Reserve or American Express Platinum have strong dispute resolution processes. Avoid debit cards entirely — if something goes wrong, getting money back from a debit transaction is far harder.
Don’t Call the Airline
Calling to "confirm" your mistake fare booking is the fastest way to get it canceled. The booking confirmation is your confirmation. Calling draws attention to the error and gives a phone agent the opportunity to cancel it on the spot. Let it sit. Most airlines process mistake fare bookings in batches and make a single decision on whether to honor or cancel — individual calls just put your booking on the radar earlier.
Book Refundable When Possible
Some mistake fares offer refundable fare classes. If you have the option and the price difference is small (sometimes only $50-$100 more), book refundable. If the airline cancels, you get your money back with zero hassle. If they honor it, you can cancel later if plans change and lose nothing.
Will the Airline Actually Honor Your Ticket?
This is the big question, and the answer is: it depends. U.S. and European airlines are more likely to honor mistake fares than Asian or Middle Eastern carriers, primarily due to consumer protection regulations. The U.S. Department of Transportation has historically pressured airlines to honor mistake fares booked in good faith, though there’s no absolute legal requirement.
Some airlines have better track records than others:
- More likely to honor: United, American, Delta (U.S. carriers generally honor to avoid DOT scrutiny), British Airways, Lufthansa, Air France.
- Less likely to honor: Emirates, Etihad, Singapore Airlines, Cathay Pacific (though Cathay famously honored the 2019 mistake mentioned earlier after public pressure).
If an airline cancels your mistake fare booking, they’re required to refund you fully. They cannot force you to pay the "correct" fare. The worst-case scenario is you get your money back and don’t get the trip — annoying, but you’re not out any money.
What to Do While You Wait for Confirmation
After booking a mistake fare, you’re in limbo. The ticket is confirmed, but you don’t know if the airline will honor it until they either let it stand or send a cancellation notice. Here’s the strategy:
Don’t Book Non-Refundable Hotels or Activities Immediately
Wait at least 48-72 hours before booking anything non-refundable around the flight. If the airline cancels within a few days, you haven’t lost money on a hotel you can’t use. If the ticket survives a week, it’s very likely to be honored — at that point, book your trip with confidence.
Monitor FlyerTalk and Social Media
Other people who booked the same mistake fare will post updates on whether they received cancellation notices or confirmation that the booking is standing. FlyerTalk threads often have hundreds of data points within 24 hours of a major mistake fare breaking. If you see a pattern of cancellations, prepare for yours to be canceled too. If you see confirmations that tickets are being honored, you’re likely safe.
Check Your Booking Online Daily
Log into the airline’s website and verify your reservation still exists. Ticketed reservations (where you have a ticket number, not just a confirmation code) are much more likely to be honored than unticketed reservations. If your booking shows a ticket number, you’re in good shape.
The Gear That Makes Mistake Fare Travel Easier
Mistake fares often come with short booking windows and departure dates that require quick planning. Having the right gear ready makes spontaneous international travel far less stressful.
A versatile carry-on bag that works for both business trips and beach vacations is essential when you’re booking mistake fares with random destinations. The Travelpro Maxlite 5 Carry-On Spinner is lightweight, durable, fits overhead bins on every airline, and has organized compartments for quick packing. When you book a $400 business class ticket to somewhere you weren’t planning to visit, you need to pack in an hour — this bag makes it possible.
For destinations you’ve never researched (because the mistake fare popped up unexpectedly), a good travel guidebook downloaded to your phone gives you instant orientation. But physical maps and offline guides still matter when your phone dies or you’re in areas with no service. The Kindle Paperwhite lets you download dozens of guidebooks, maps, and travel resources before you leave — and it weighs almost nothing. Essential for spontaneous mistake fare travel where you have 48 hours to learn about a destination.
International travel on mistake fares often means unusual routing through countries you weren’t planning to visit. A universal travel adapter ensures you can charge devices regardless of where you end up. The EPICKA Universal Travel Adapter works in 150+ countries, has multiple USB ports, and includes a fuse for safety. When your mistake fare routes you through Istanbul, Mumbai, and Singapore on the way to Australia, one adapter handles all three stops.
Real Mistake Fares From the Last Few Years
To give you a sense of what’s actually possible, here are confirmed mistake fares that were honored:
- March 2022: Lufthansa business class from U.S. to India for $550 roundtrip (normal price: $4,000+). Honored.
- September 2021: British Airways first class from U.S. to Dubai for $1,200 roundtrip (normal price: $9,000+). Honored after initial confusion.
- August 2019: Cathay Pacific business class from Vietnam to North America for $875 (normal price: $4,500). Honored after public backlash.
- December 2018: United premium economy roundtrip to Australia for $350 (normal price: $1,800+). Honored.
- July 2017: Delta business class one-way to Asia for $750 (normal price: $3,500+). Honored selectively.
These aren’t theoretical. They’re real bookings by real travelers who flew in premium cabins for prices that made no sense.
The Bottom Line
Mistake fares won’t replace a normal travel planning strategy, but they create opportunities to fly business or first class to destinations you’d never afford otherwise. The people who benefit aren’t lucky — they’re prepared. They’re monitoring the right sources, they know how to book fast, and they understand the risk that some bookings get canceled.
Set up alerts. Follow the forums. Keep a valid passport. Have a credit card ready. And when a mistake fare breaks, book first and figure out the trip details later. The worst case is you get a full refund. The best case is you fly business class to Europe for $400.
Related reading: shoulder season strategy, luxury Japan on a budget, and luxury villa rentals.
Your next luxury flight might be a pricing error away.