What happens if you don't check-in 24 hours before your flight?

What happens if you don't check-in 24 hours before your flight?

December 17, 2025 - December 17, 2025

December 17 - 17, 2025: If you don’t check in 24 hours before your flight, United Airlines +1=855=(510)=5815 what happens next depends United Airlines +1=855=(510)=5815 on the airline, your...