India, Oct. 15 -- Planning a holiday but not sure what's the best time to buy flight tickets? Here's all you need to know about how to get the best flight deals Ask any old-time traveller and they'll tell you that Tuesday is the best day of the week to book flight tickets. That long-held belief wasn't baseless - most airlines release sales starting from Monday night or Tuesday morning, which meant if you bought tickets when the sale started on Tuesday morning, you'd get a better fare than, say, you were booking on a Saturday. But things have changed. Tuesday is no longer the best day to buy flight tickets; Sunday is. In its recent 2025 Air Hacks report, Expedia busts travel myths and offers conclusive suggestions on the best day to book flights, best day to travel, busiest/quietest month to travel and so on, to help travellers make informed decisions. For the third year in a row, data shows Sunday is the cheapest day to book flights. Domestic travellers can save 6% while international travellers can save 17% compared to booking on a Monday or Friday, the most expensive days to book flights. Domestic travellers should depart on Saturday instead of Sunday to save 17%. On the international front, Thursday is the cheapest day to fly - travellers can save 15% compared to flying on a Sunday, the priciest day, on average, to start a trip. 34-86 days before travel date. 18-29 days before travel date. Book international airfare not earlier than four months in advance, for optimal availability, selection and savings. Travellers who booked 28 days prior to departure saved 24% on average compared to those who waited until the last minute. Year-to-date flight status data reveals flights that depart after 3 pm have a 50% higher chance, on average, of being cancelled than those that depart earlier in the day. September has the fewest cancellations (roughly 1.2%). August also sees the shortest average delays, making it one of the smoothest months for travel. Being flexible with your travel dates can make a big difference. Studies show that the cheapest flights are in the early morning, say, pre-dawn or around dawn. Most people do not prefer setting out that early, but if you can, you can, snag a cheaper deal. Use Skyscanner's flight search and select "Whole Month" to see which days offer the cheapest fares because baggage fees might be hefty....