Error fares flights are one of the best-kept secrets in the travel world. Every year, thousands of travelers fly to destinations they could never normally afford — sometimes for 90% less than the standard price — simply because an airline accidentally published the wrong ticket price. These mistakes happen more often than most people realise, and knowing how to spot and book them can fundamentally change what your travel budget can achieve. Cheap flights are one of the most powerful tools a budget traveler has, and our complete guide to budget travel in Europe covers how to make every part of your trip as affordable as possible once you land.
What Are Error Fares?
Error fares — also called mistake fares — occur when an airline accidentally publishes a ticket price far below its intended rate. These are genuine pricing errors, not promotional deals or limited sales. The result is a real, bookable flight at a price that makes no commercial sense: a transatlantic business class ticket for €200, a return flight from London to Bangkok for £80, or a European city hop for £3.
What makes error fares both exciting and urgent is their lifespan. Most last anywhere from a few minutes to a few hours before the airline spots the mistake and corrects the price. Some survive longer — occasionally an error fare lingers for a day or two before anyone catches it. But in most cases, the window is short. Travelers who have their alerts set up and act quickly are the ones who get to fly for almost nothing.
Once booked, error fares are often honoured. Airline policies vary, but many carriers — particularly those operating within the EU and US — are obligated or choose to honour confirmed bookings even if the fare was an error. This is not guaranteed, and airlines do occasionally cancel mistake bookings, but the success rate for error fare flights that are booked quickly and correctly is higher than most travelers expect.
How Error Fares Happen
Understanding the mechanics behind error fares helps you recognise a genuine mistake fare when you see one — and there are several common causes.
Currency conversion errors are among the most common causes. Airlines price tickets in multiple currencies simultaneously, and when exchange rate data fails to update correctly or a decimal point is misplaced during conversion, fares in one currency can drop to a fraction of their correct value. A ticket priced at 500 USD might appear as 5 GBP if a conversion rate gets corrupted.
Fuel surcharge omissions are another frequent trigger. Long-haul flights carry significant fuel surcharges that can exceed the base fare itself. When these surcharges fail to apply correctly during a system update — a relatively common IT event — the resulting fare can drop by hundreds of dollars overnight without anyone noticing immediately.
IT system glitches occur during software updates, database migrations, and system maintenance windows. Airlines run extraordinarily complex pricing systems with thousands of variables updating in real time. When those systems hiccup, pricing anomalies can appear across whole route families simultaneously.
Human data entry errors still happen despite automation. A fare loaded at £1,800 might be entered as £18 if someone misses a zero. These are the rarest but often the most dramatic error fares — genuine typos that create once-in-a-generation flight deals.
Competition-triggered errors occur when automated pricing systems react too aggressively to a competitor’s sale. If airline A drops a fare to stimulate demand, airline B’s dynamic pricing algorithm might counter-price below cost in an attempt to match or undercut, creating a fare that was never intended to be published.
Best Websites to Find Error Fares
The most reliable way to catch error fares is to monitor the communities and services that hunt them full time. These teams track millions of fare combinations continuously and publish deals the moment they spot an anomaly.
Secret Flying is one of the longest-running and most reliable error fare trackers. It covers worldwide mistake fares and posts deals the moment they are confirmed, with clear information on which airlines are involved, how long the fare has been live, and whether it has been successfully booked by members of the community. It is free to use and updated constantly.
Scott’s Cheap Flights (now rebranded as Going.com) built its reputation on finding and distributing genuine flight deals and error fares to subscribers. The free tier sends occasional deals, while the premium subscription unlocks the best mistake fares and business class error deals within minutes of them going live. For frequent fliers based in the US, it is consistently the most valuable paid flight deal service available.
The Flight Deal (theflightdeal.com) focuses on US departure points and covers both genuine sale fares and error fares across economy and premium cabins. The site has a strong reputation for accuracy — deals published here have consistently been bookable when members of the community act quickly.
Holiday Pirates is particularly strong for European departure points and covers error fares, flash sales, and package deal anomalies across the continent. With a dedicated app and active community forums, it is one of the best resources for travelers based in Europe looking for deals from their home airports.
Airfarewatchdog covers both sale fares and error fares and has a useful price history feature that helps you identify whether a fare is genuinely anomalous or just a standard promotional price dressed up as a deal.
Tools to Find Secret Flight Deals
Beyond the dedicated error fare websites, several mainstream flight search tools are genuinely useful for surfacing secret deals and low-fare anomalies.
Google Flights is the most powerful general-purpose flight search tool available. Its price calendar view allows you to scan an entire month’s worth of fares at a glance, making unusual pricing dips immediately visible. The “Explore” map feature is particularly useful for travelers with flexible destinations — it shows the cheapest available fares to every destination from your home airport simultaneously, which is exactly the environment in which error fares stand out. Set price drop alerts on any route you are watching and Google will notify you the moment the fare changes.
Skyscanner remains one of the best tools for multi-airline fare comparisons. Its “Everywhere” destination search is a favourite tool for error fare hunters — search from your home airport to “Everywhere” and sort by price to immediately see which routes have unusually low fares. When a genuine error fare is live on Skyscanner, it will typically appear at the top of this list with a price that looks completely out of place against all other results.
Kiwi.com specialises in combining tickets from multiple airlines into a single journey — including routes that airlines themselves do not sell as connections. This creates occasional “virtual interlining” pricing anomalies that function like error fares: you get a price that no single airline would offer, assembled from the cheapest available legs across different carriers. Kiwi also has a strong price alert system and an active deal-sharing community.
Airfare alerts via airline newsletters are underrated. Signing up directly to budget airline email lists — Ryanair, easyJet, Wizz Air, Norwegian — puts flash sale notifications directly in your inbox. These are not error fares, but they are often the first source of genuinely discounted fares before aggregators pick them up.
Tips for Booking Error Fares
Finding an error fare is only half the challenge. Booking it correctly and managing the process afterwards requires its own strategy.
Book immediately. The single most important rule of error fare travel is speed. Every minute you spend deliberating is a minute in which the airline might correct the price or the remaining seats at the error rate might fill. Open the booking, confirm the price is still showing correctly, and complete the purchase before you do anything else.
Do not call the airline. This sounds counterintuitive, but calling the airline to confirm an error fare is real is almost always a mistake. Airline phone staff are often the first people to flag the error to the pricing team, accelerating the correction. Book online silently and let the booking confirm.
Wait before booking hotels. Until you receive a confirmed booking reference and the ticket has been issued — ideally with an e-ticket number from the airline — do not book non-refundable hotels or connecting travel. Airlines occasionally cancel error fare bookings within 24 to 72 hours of purchase. Give the booking time to solidify before committing additional spend around it.
Book refundable hotels initially. If you cannot wait and need to book accommodation, choose fully refundable options until your ticket is confirmed. The small price premium for flexible hotel bookings is worthwhile insurance against a cancelled error fare.
Screenshot everything. Take screenshots of the fare as displayed during booking, your booking confirmation, and the payment confirmation. If the airline later attempts to cancel the booking, having a clear record of the fare as it appeared at the time of purchase strengthens your position in any dispute.
Be flexible with dates. Error fares rarely cover every travel date equally. The mistake might only apply to specific departure dates — often midweek or during off-peak periods. Travelers with flexible schedules are significantly more likely to find available error fare inventory and complete a booking successfully.
Best Departure Cities for Cheap Flights in Europe
Not all airports are created equal when it comes to cheap flight opportunities. The largest European hubs generate the most competition between airlines, which means lower base fares, more error fare exposure, and more route options when a deal appears.
Frankfurt is one of the best airports in Europe for cheap long-haul fares. As Lufthansa’s main hub and a major gateway for multiple low-cost carriers, Frankfurt sees intense competition on transatlantic and Asian routes that regularly produces genuine bargains. Travelers based in Germany have some of the best access to cheap flights on the continent — our guide to budget travel from Germany covers how to use Germany’s excellent transport network and central location to access the cheapest fares across Europe and beyond.
London — served by Heathrow, Gatwick, Stansted, Luton, and City — is the largest aviation market in Europe and generates more error fares and flash deals than any other city. The sheer volume of airlines competing for routes from London means pricing anomalies appear regularly. Standby and same-day deals are also more common here than anywhere else on the continent.
Amsterdam Schiphol is KLM’s hub and one of the most connected airports in Europe. Its strong transatlantic and Asian connectivity means long-haul error fares appear regularly, and its central European location makes it a strong starting point for any multi-destination trip.
Berlin and Paris Charles de Gaulle round out the top tier for European error fare hunting. Berlin’s growing status as a low-cost carrier hub, combined with Ryanair and easyJet’s strong presence, creates regular pricing anomalies on intra-European routes. Paris CDG, as Air France’s home and a major global hub, sees frequent long-haul pricing errors particularly on routes to North America and Southeast Asia.
Combining Cheap Flights with Budget Travel
An error fare or a secret flight deal is only the beginning of a cheap trip. The real skill is combining a low-cost flight with equally affordable ground transport, accommodation, and daily spending at the destination — and that is where smart destination choice matters as much as smart flight booking.
Pairing a cheap flight with a landing in an affordable city dramatically amplifies the saving. Flying into Budapest on a €15 Wizz Air fare and then spending four nights in a city where a good hostel costs €12 and a restaurant meal costs €6 is a fundamentally different financial experience from flying cheap into Paris and dealing with Western European prices. Our guide to the cheapest cities in Europe covers exactly which destinations give you the most rewarding experience at the lowest daily cost.
Budget airlines make this approach even more powerful — knowing which carriers fly to the most affordable destinations from your home airport is an essential part of trip planning. Our breakdown of the best budget airlines in Europe covers routes, typical fares, and booking strategies for Ryanair, easyJet, Wizz Air, and more.
For travelers aiming to keep total daily spend at an absolute minimum, the combination of an error fare or cheap flight with careful on-the-ground budgeting is transformative. Our guide to traveling Europe on $50 a day shows exactly how to structure a daily budget that covers accommodation, food, transport, and activities without feeling restricted — and how a cheap flight at the start of the trip creates financial breathing room for everything that follows.
Frequently Asked Questions About Error Fares
Are error fares real?
Yes — error fares are genuine pricing mistakes published by real airlines. They are not scams or clickbait. When a legitimate error fare appears, it is a real bookable ticket at the incorrect price, processed through normal airline booking systems. The challenge is finding them quickly and booking before the airline corrects the price or the allocated inventory sells out.
Can airlines cancel mistake fares after booking?
Airlines can attempt to cancel error fare bookings, and some do. However, many carriers — particularly those operating under EU261 consumer protection rules or US DOT regulations — choose to honour confirmed bookings to avoid the reputational damage and regulatory scrutiny that comes with mass cancellations. The best error fares to target are those on large, established carriers who have a track record of honouring mistake bookings. Budget airlines are less consistent in this regard.
How often do error fares happen?
Genuine error fares appear several times per week globally when you monitor the right sources. Most are short-haul European deals in the £5 to £30 range. Significant long-haul error fares — business class tickets for economy prices, for example — appear less frequently, perhaps once or twice a month. The key is having your monitoring in place so you are notified the moment they appear rather than discovering them hours later when the window has already closed.
Do you need to travel immediately to use an error fare?
No — error fares are bookings for future travel, not same-day tickets. Most error fares are for departure dates weeks or months in the future. You book immediately when the error is live, but the actual travel date can be anywhere from a few weeks to several months later. This gives you time to plan the rest of your trip after securing the flight.
Start Hunting for Error Fares Today
Error fares flights and secret flight deals reward preparation, speed, and flexibility more than luck. Set up your monitoring now — bookmark Secret Flying, subscribe to Going.com or Holiday Pirates, and activate price alerts on Google Flights and Skyscanner for your most-wanted routes. The deals will come to you rather than requiring you to check manually every day.
Error fares are the most dramatic cheap flights — but consistent savings come from applying smart booking strategies on every trip. Our guide on how to find cheap flights covers the full toolkit: comparison tools, flexible dates, budget airlines, and the booking windows that deliver the lowest regular fares.
The bigger picture is this: every pound, euro, or dollar you save on a flight is money that can go toward more nights away, better experiences, or simply a longer trip. Combined with smart destination choices and on-the-ground budget strategies, cheap flights are the foundation of genuinely affordable travel. Our complete guide to budget travel in Europe covers every other component of planning a low-cost European trip — from accommodation and ground transport to daily budgets for every major destination on the continent.