Bottom Line. Booking on Friday will cost you more, and booking on Sunday can save you up to 15% on your airline tickets. But there are tons of ways to save even more on airline tickets instead of just waiting until Sunday to book your flights.

For the 2026 season, the official Disneyland Resort Grad Nite events generally conclude at 2:00 AM. The event is structured as a private party that takes place primarily at Disney California Adventure Park after it has closed to the general public. While the specific "mix-in" time (when grads can enter the parks) usually begins as early as 9:00 PM, the exclusive "Private Party Experience" runs through the early morning hours to provide high school seniors with a safe and supervised environment to celebrate. Because these events are highly coordinated for large school groups, buses typically begin boarding students for the return trip around 1:30 AM or 2:00 AM. It is important for regular guests to be aware that on Grad Nite dates (usually select Tuesdays, Wednesdays, Thursdays, and Fridays in May and June), Disney California Adventure will close its doors to the general public much earlier than usual—often by 8:00 PM or 9:00 PM—to allow the transformation into the private graduation venue. If you are planning a visit during this window, checking the official Disney "Day View" calendar for early closures is essential to maximize your park time.

Historically and in 2026, Sunday is widely considered the most expensive day of the week to book airline tickets. This is primarily because many leisure travelers spend their weekends planning trips and making final purchases, which allows airlines to keep prices higher due to the surge in demand. Conversely, Tuesday and Wednesday are often cited as the cheapest days to book, as airlines frequently release sales and fare adjustments early in the work week to entice shoppers. While the "cheapest booking day" can vary by route, the trend of Sunday being the priciest remains relatively consistent across domestic and international markets. It is also important to distinguish between the day you buy the ticket and the day you fly; flying on a Friday or Sunday is typically the most expensive due to weekend demand from both business and leisure travelers. To get the best deal, travel experts recommend setting price alerts and being flexible with your dates, but if you find yourself ready to click "purchase" on a Sunday afternoon, it might be worth waiting until Tuesday morning to see if the price drops.