Which options are available for Jetblue early check in? Customers of JetBlue can check in for their flights up to 24 hours before the planned departure time. You can check in online or at a JetBlue airport kiosk using the airline's website or mobile application. You can print your boarding card or request that it be forwarded to your mobile device whether you check in online or using the mobile app. Your boarding card can be printed at an airport kiosk if you check in there.