Left arrow
Travel Tips

Why There’s No Cheapest Day to Buy Flights

Scott Keyes
By 
Scott Keyes
Co-Founder & CEO
7 min read
Last updated 
August 22, 2019

Voracious readers of Scott’s Cheap Flights guides have seen us say it frequently: the best time to buy a flight is 3-6 months before your trip (or a bit more, if you’re traveling during peak times or your dates are inflexible). We stress that doesn’t mean you should book your ticket as soon as you hit that window, though. Airfare prices can fluctuate daily so you should wait until you find a good deal, and then jump on it before it’s gone. 

But, people often ask, if airfare can change daily, is there a day of the week when I’m more likely to find a great deal? 

The myth of the cheapest day to buy flights

In the early days of online flight booking, airlines used to manually post their updated prices at a certain time of day each week. This led to the rise of the myth that the cheapest time to book a flight was on Tuesday (and specifically at 3am, many claimed). 

Airfare prices are now updated constantly and automatically, using complex algorithms, yet still myths persist that there’s a cheapest day of the week to buy flights.  

For example, our friends at Skyscanner, have used their data to say that the cheapest day to buy flights is Sunday. But there’s an inherent flaw in determining a “best day.” Just because prices are lower on average on that day doesn’t mean that prices will be lower for your flight. Nor does it mean that you shouldn’t bother looking for flights on other days. 

Skyscanner goes so far to say that the best month of the year to book a flight is September. CheapOair gets even more specific, saying that August 23 is "National Cheap Flight Day," the cheapest day of the year to book a flight based on their data. But again, while their data points to average prices being lower that month or that day, it doesn’t mean prices for your particular trip will be lower. 

And in fact, if you waited until August 23 to book, you might miss out on some amazing deals. One of the best deals we sent in 2018—Los Angeles to Bali in business class for $670 (normally $4,500)—was sent August 16. As the below graph shows, we actually sent more deals to US-based members the week before "National Cheap Flight Day" and the number of deals varies week to week, with an average of 40 deals per week going out to our US members.

graph of number of deals sent per week.

Not everyone agrees with assessments like Skyscanner’s or Cheapoair's, though. Cheapair’s stance is closer to ours, for example. They say, “What day of week you purchase a flight has a negligible effect on flight cost. The average low fare only varies by $1 based on the purchase day of week. Whether you buy that ticket on Tuesday or Sunday it’s going to cost about the same.” 

So, with the experts disagreeing, when is the cheapest day to buy flights?

Here’s the truth: There is no cheapest day to buy flights. 

Flight prices change constantly and while your chances of getting a deal are better within a certain window of time (generally 3-6 months out, as mentioned above), there is no magic day on which prices suddenly drop. Price can drop at any time, which means the cheapest day to buy flights is the day you find a great flight deal. 

Our team of Flight Experts searches for—and finds—deals every day of the week, at all hours of the day, like this deal to Hawaii for as low as $98 roundtrip, sent on a Monday at 10am ET, this deal to Fiji for $396 roundtrip, sent on a Tuesday at 2am ET, or this deal to cities all over Asia starting in the $300s, sent on a Thursday at 7pm ET. 

So, when we hear travelers and “experts” repeating the long-held myth that the cheapest day to buy flights is on a Tuesday at 3am, we can’t help but chuckle. 

While this statement may have once held water nowadays airline prices are constantly, automatically being updated by complex algorithms that mean prices can fluctuate by the second.

Should I buy now or wait for a better deal?

So, if there’s no single cheapest day to buy flights, how do you know if you should book now or wait for a better deal? 

First, get familiar with the average prices for the places you want to go, so that you can identify a good price when you see one. While there are seasonal variations (and you can expect to pay a lot more over the holidays), here are some general guidelines for good prices when traveling from the US.

  • Africa: $800 or below roundtrip
  • Asia: $500 or below roundtrip
  • Australia: $800 or below roundtrip
  • Caribbean: $300 or below roundtrip
  • Central America: $300 or below roundtrip
  • Europe: $500 or below roundtrip
  • Hawaii: $400 or below roundtrip
  • South America: $600 or below roundtrip

Additionally, Google Flights recently rolled out a new feature (not available yet on all routes) which tells you how the price you’ve found compares to average prices for that route on those dates. The bar below the flights tells you if prices are currently low, average, or high for your dates. 

Google Flights deal indicator

You can see above that Google thinks this flight is a great deal, with prices much cheaper than usual. But, if you’ve found a flight that isn’t a stellar deal, and you have some flexibility in dates, and you’re still in the 3-6 month window, you could hold out a bit longer, keep checking, set some fare alerts, and be ready to pounce when the price drops. 

However, when you have less flexibility and it’s a trip you need to take either way, you may want to err on the side of caution. In that case it may be better to book a decent deal and slightly overpay rather than wait too long, watch the price rise, and end up grossly overpaying. 

If you’re not sure a deal is great, or if you’ve found a great deal but aren’t positive you can take the trip, use the 24-hour rule to your advantage. 

This US regulation states that an airline must allow you to lock in the price for a set period of time, or it must allow free changes or cancellation within 24 hours of purchasing. The rule only applies to flights going to or from the US, purchased directly with the airline, at least seven days in advance of travel. That means you can snag the deal before the price changes but have the peace of mind knowing you can cancel if you change your mind within 24 hours. 

While the rule only applies to flights purchased from the airline, many OTAs, like Priceline, offer similar policies that let you cancel a flight within a set period of time.

We send our 1.6 million members amazing flight deals—with an average savings of $550 per ticket—24/7. Join now and never miss another great deal.

Last Updated 
August 22, 2019
Why There’s No Cheapest Day to Buy Flights
Scott Keyes
Co-Founder & CEO

Scott has traveled to 46 countries (and 46 states!), living in California, to Oaxaca, to Oregon. He’s left-handed, drinks five cups of tea daily, and holds a vendetta against the “Happy Birthday” song. On a dare, he once ate 13 hot dogs (and a bowl of Dippin’ Dots) at the ballpark. He grew up in Ohio and founded Scott’s Cheap Flights in a Denver coffee shop. Favorite airport: PDX.

Get alerts about cheap flights up to 90% off normal prices
Find out when airlines accidentally publish the wrong prices
Save hundreds on summer, peak season and holiday flights
Sign Up
Right arrow