When flying with JetBlue, the cheapest days are generally Tuesday and Wednesday, as midweek flights have less demand. To maximize savings, book your tickets well in advance and watch for limited-time sales or fare drops. Additionally, being flexible with your travel dates can lead to even better deals. Consider using fare alerts to stay informed about price changes and special offers. Checking JetBlue's website regularly can also uncover exclusive promotions that can help you save on your next trip.