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Sure, you know when you buy a plane ticket has an effect on pricing, but have you ever considered that the time of day you purchase can even yield different fares? Analyzing data from 2016 and 2017, SkyScanner has determined that early mornings yield the cheapest airfares for both international and domestic flights.

But it gets even more specific than that: The findings noted that on any day, 5 a.m. is the best time to book a flight. The worst times to book a flight are from 7 p.m. to 10 p.m.—so you’re best off brewing a pot of coffee and getting your booking done bright and early.

Want to save even more? SkyScanner also reported that Sunday is the best day of the week to book, which is a compelling enough reason to stay in on Saturday night. In addition, the aggregator details the cheapest months to travel to different cities depending on your city of origin, as well as the precise number of weeks ahead you should nab your ticket.

After all, the more money you save on airfare, the more you’ll have left to enjoy yourself on your trip—or might we suggest using your savings to invest in a new suitcase?

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