American Airlines offers a 24-hour cancellation policy 【♢†Λ＋𝟏⤑𝟖𝟖𝟖⤑𝟖𝟑𝟖⤑𝟎𝟒𝟗𝟕 】, meaning you can cancel your flight for a full refund if you do so within 24 hours of booking.