Delta Air Lines offers web check-in for passengers traveling on their flights. This service allows passengers to check in for their flight and select their seat online, before arriving at the airport. To use web check-in, passengers can visit the Delta Air Lines website, enter their booking reference or e-ticket number, and follow the prompts to complete the check-in process. Web check-in is typically available 24 hours before the scheduled departure time of the flight and closes 45 minutes before the flight. Passengers must print their boarding pass or have it available on their mobile device to present at the airport.more info-https://www.airlinesmap.com/de....lta-airlines-web-che