United Airlines How do I check in online for United Airlines? 1 - 855 - 547 - 0830 How to Check In Online for United Airlines Covers: united airlines check process. Quick guide to completing your United Airlines online check - in What is United Airlines Online Check - In? A digital process to confirm your flight. Available 24 hours before departure. Complete required travel details in advance. Visit the Official Website Visit the Official Website Go to www.united.com. Navigate to Check - In Click on 'Check - in' at the top menu. Enter Your Details Enter your confirmation number and last name. Step 1 Choose Your Check - In Options To redeem, enter the promo code in the designated box during the online checkout process on Copa Airlines website or app. Select Passengers Choose the travelers you want to check in. Add Travel Documents (If Required) Upload or enter passport/ID information when necessary. Review Your Flight Details Confirm flight time, seat selection, and baggage before finalizing. Step 2 Select Seats & Add Bags Pick or change your seat. Add checked bags with applicable fees. Review upgrades if available. Step 3 Download Your Boarding Pass Boarding Pass Options Choose mobile boarding pass, print, or receive via email. Mobile Pass Boarding App Mobile pass is available in the United app. QR Code Visibility Ensure the QR code is clearly visible on your device. Step 4 Tips for Smooth United Airlines Check Check In Early (24 Hours Before Departure) Use the United App Keep Your ID/Passport Handy Arrive Early at the Airport 1 3 2 Complete online check - in as soon as it opens to avoid delays. Access mobile boarding passes and real - time flight updates. 4 Have your documents ready for security and check - in counters. Even with online check - in, reach the airport well in advance. Safe travels & happy savings! for viewing our United Airlines Check in presentation! Thank you 1 - 855 - 547 - 0830 We appreciate your time For booking assistance or the latest offers, contact: