Do airlines publish schedules?

Airlines publish schedules about a year out from departure and as the flight date gets closer, airlines often need to change the departure time or scrap the flight altogether.



Yes, airlines publish their schedules, but in 2026, these are "living" data feeds rather than static paper booklets. They are published via Global Distribution Systems (GDS) like Amadeus and Sabre, which travel agents and websites use. Airlines typically release their flight schedules 330 to 360 days in advance. However, these are subject to "Schedule Changes" as the date approaches. A flight you book in January for December might have its departure time shifted by 15 minutes or its flight number changed by June. Major hubs also publish "Slot" schedules to coordinate the hundreds of takeoffs and landings per hour. For enthusiasts, websites like Official Airline Guide (OAG) provide the most comprehensive data on every scheduled commercial flight worldwide.

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Airlines may show more different route options on their web sites as you get closer to your date if they have excess capacity (empty seats) they want to try to fill. This doesn't mean the extra offerings are better or less expensive than what was already shown.

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MILOS allows airlines to manage flight schedules through a user-friendly Schedule Builder. The Schedule Builder provides drag and drop features which allows airlines to effectively build daily, monthly and annual schedules through an intuitive graphical interface.

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Generally, flights are available to book around 11 months in advance, although it will differ from airline to airline. Check out our page on how far in advance you can book flights for more information.

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Time your booking right
“For domestic flights, if you're talking peak season, it's about three to seven months in advance,” he says. “For international flights — [it's] four to 10 months.”

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Keyes suggests booking your ticket at least 21 days before departure (if possible), since airlines have policies that will substantially raise the price of airfare for trips taking place after that deadline.

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If the change is significant enough and there are no other flights that work with your schedule, you do have the option to request a cash refund (even with a normally non-refundable basic economy fare).

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If airlines cancel a flight for any reason, passengers are legally entitled to a full refund, including for ticket price, taxes, baggage fees, extra charges and ancillary fees. Travelers must receive that refund within seven business days if they paid by credit card, and within 20 days if by cash or check.

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