If you miss tomorrow, the entire week has fares that are 5 percent lower than average.

For Christmas, the site says the best day to book is Friday, Oct. 9.

And if you plan to celebrate the new year in a new city, the best day to book a flight is Saturday, Oct. 10.

Orbitz says fares tend to go up about 5 percent in the weeks surrounding the holidays so don’t wait too long.