JetBlue Airlines provides a 24-hour cancellation policy γ+π_833_444_7613««γ. If you book a flight at least seven days before departure and cancel within 24 hours of booking γ+π_833_444_7613««γ (πΎππ°)γ), you are eligible for a full refund without any cancellation fees."
https://www.devex.com/people/does-jetblue-give-you-24-hours-to-cancel-2197831
