Struggling with a last-minute change? Learn how to cancel your United Airlines flight within 24 hours of booking hassle-free under their official 24-hour cancellation policy. This U.S. DOT rule allows full refunds for tickets purchased directly from United, no fees attached, as long as you act within that window.

Step-by-Step Guide:

1. Log into your United account or app.

2. Go to "My Trips" and select the flight.

3. Choose "Cancel Flight" – instant refund to your original payment method.

Can't access online? Dial United's toll-free number 1-866-240-2839 for expert help from live agents available 24/7. They'll verify eligibility, process your cancellation securely, and answer queries on refunds or rebooking. Avoid third-party hassles – this direct line ensures quick resolution.