If you want to pay for your flight with TrueBlue points but don't have enough, you can reserve the mint cabin by paying with a combination of cash and TrueBlue points. To upgrade to the specified cabin class using TrueBlue points, take the following actions:
Visit the TrueBlue accounts page on the JetBlue Airlines website and log in.
Obtain your flight reservation. Verify your flight's schedule to check if the "JetBlue Mint Upgrade" option is offered.
Pay the necessary money or miles to finish your flight upgrade. To finish your request, adhere to the on-screen instructions.
The amended cabin class and a confirmation email from the airlines will be sent to your email address.
To choose your seats, complete the check-in process.
To complete the process, create the boarding pass.