You can check in for a JetBlue flight starting 24 hours before the scheduled departure time. Online and mobile check-in opens exactly 24 hours before your flight and remains available until shortly before boarding. This allows you to confirm your flight details, select or change your seat, add baggage if needed, and obtain your boarding pass. Online check-in is ideal for travelers with carry-on luggage only, as it lets you skip the check-in counters and go straight to security and the gate. If you have checked bags, you must drop them off at the bag drop counter at the airport. Bag drop counters usually open three hours before departure and close 40 minutes before for domestic flights, or 60 minutes before for international flights.

If you prefer to check in at the airport, JetBlue offers self-service kiosks where you can check in, print boarding passes, and print baggage tags. These kiosks open about three hours before departure and close at the same time as bag drop counters. After printing baggage tags, you proceed to the bag drop area to check your luggage. Staffed check-in counters are available for those needing assistance, traveling with infants, or who prefer to check in with an agent. These counters open three hours before the flight and close according to bag drop times.

JetBlue recommends arriving at least two hours before domestic flights and three hours before international flights to allow time for check-in, security screening, and boarding. Boarding usually begins 30 to 40 minutes before departure, and gates close 15 minutes before the flight leaves. Arriving at the gate on time is crucial to avoid missing your flight.

In summary, online and mobile check-in for JetBlue flights opens 24 hours before departure, while airport kiosks and counters open about three hours before. Planning ahead and arriving early ensures a smooth check-in and boarding process.