According to the travel app Hopper, airfare prices are the lowest they have been in four years. But taking advantage means booking early.
If you're booking a domestic flight, you should do so at least three weeks before your trip. Every day after that three-week mark, Hopper said the prices can go up about $11 a day.
ABC7 Consumer Investigator Jason Knowles has another secret tip for spring travelers.
When booking domestic flights, you can save up to 20% if you leave on a Tuesday or a Wednesday.