TrueBlue frequent flyer points can be earned through a variety of purchase activities and the scheme is free to join. When booking with JetBlue, either a flight, hotel or package deal, you can use some or all of your points against the total cost of your transaction. When searching for your next trip, tick the Use TrueBlue Points box, which will bring up the value of points required for the flights and hotels you're about to select. You can also pay for your trip with part points, part cash. Again, tick the box when making a search. When you get through to checkout, if you have enough points for the transaction the system will inform you that no other payment is needed. If you don't have enough points, the system will work out how much cash is needed in combination with the points you have.