It’s pretty hard to believe that 2018 is coming to a close. That means it is time to start planning for 2019 and getting your travel schedule in order.

You want to ensure that you are traveling during times that will save you the most money. It’s not just about finding the right time to purchase your tickets, but you must also be aware of the best times to actually travel. If you travel during off-peak times, it can help you get other perks such as upgrades and extra space while flying.

Related: The ‘Turn Up’ On Flights Is Getting Pricey As Alcohol Prices Are On The Rise

According to Hipmunk, January and September will be the best time for travel in 2019. Hipmunch analyzed millions of flight bookings over a 24-month booking window to find the most cost-effective months to fly to popular US cities. According to their study, this is because these are times when children are going back to school, the official vacation season is wrapping up, and families aren’t looking to travel as much. Flying in January can save 31 percent, and flying in September can save 25 percent, according to Hipmunk data. 72 percent of all 60 cities Hipmunk analyzed, had a “When to Go” date in either January or September.

You want to avoid November and December if you can. 63 percent of all 60 cities analyzed by Hipmunk had their peak prices in either November or December. It is suggested that you take a staycation or even a road trip instead during those months.

Related: New Study Shows That Drinking In-Flight Coffee Could Give You More Than Caffeine

As far as the summer months are concerned, July will bring some of the highest prices of the summer. It is better to consider June or August for your summer vacations plans, although prices will still be somewhat high.