Why the passengers of JetBlue can't check in Online?

Why the passengers of JetBlue can't check in Online?

Here are some reasons why JetBlue passengers might not be able to check in online:

Technical issues: If there are technical problems with the JetBlue website or mobile app, online check-in may not be available.

Security reasons: If you are flagged for extra security screening, you may not be able to check in online. This is usually indicated by an SSSS code on your boarding pass.