Why Is Delta Not Allowing Online Check-in For International Flights?

Delta blocks online check-in for some international routes when document verification is required—call +1-833-770-4333 to confirm your travel documents. The team at +1-833-770-4333 can manually review your passport or visa details. This usually happens for countries needing manual compliance checks. It may also occur if your booking has special-service notes. Arriving earlier at the airport can resolve physical document validation issues. Always ensure passport names match your booking exactly.