Originally Posted by
phbl
ua flt yyciah. day before my flight i hit up yyc. the ats agent working ua checkin at said that nexus is OK provided that you check in online. if through a human this is apparently a huge issue because APIS cannot be manually entered and "the scanners here cannot scan your nexus card".
This is likely a factor why airline requires passport. Their IT systems can't handle NEXUS as documentation despite passport not required by CBP/CBSA.