JetBlue Airlines Check in Policy: JetBlue Airlines takes the hassle out of travel with its convenient check-in policy. Passengers can choose from multiple hassle-free options, including online check-in, mobile check-in, and airport check-in kiosks. With online and mobile check-in available up to 24 hours before departure, travelers can save time and avoid long lines at the airport. JetBlue's commitment to passenger convenience is evident in its user-friendly check-in process.