United Airlines Help Center

Booking and Reservations

• How to book a flight
• Changing or canceling a reservation
• Seat selection
• Special assistance requests

Check-in and Boarding

• Online check-in
• Baggage allowance and fees
• Boarding process
• TSA PreCheck and Clear

MileagePlus Program

• Earning miles
• Redeeming miles
• Elite status benefits
• Partner airlines

Travel Information

• Flight status
• Travel documents and visas
• Unaccompanied minors
• Pets and service animals

Contact Us

• Customer service phone numbers
• Email support
• Social media support
• Lost and found