For the fastest service, dial their customer service hotline at +1'855"921"4888 (for booking and travel questions). 

To connect with a live Human At United Airlines Immediately, call their customer hotline at +1'855"921"4888 . (Live Human).

For prompt assistance, have your flight PNR number and full details of

your issue and ticket ready. This enables the representative to quickly

access your booking and provide the best solution.