Within 24 hours of your departure, you can check in and notify Delta of the number of bags you will check on delta.com or on the Fly Delta app. If you've already checked in, drop your bags at Baggage Drop. You may also check in and pay for bags at the airport.

Yes, you can typically add a checked bag after completing online check-in with Delta Air Lines, but there are important details and deadlines to know.

Here’s a breakdown of how and when you can do it:

Ways to Add a Bag After Online Check-In:

1. Online / Delta App: This is often the easiest and cheapest method.

   • You can usually add bags and pay the fee via the “Manage My Trip” section on Delta’s website or in the Fly Delta app up to a few hours before your flight’s departure.
   • Look for an option like “Add Bags” or “Purchase Baggage” in your trip details.

2. At the Airport:

   • Self-Service Kiosk: You can add and pay for bags at any Delta self-service kiosk in the airport.
   • Ticket Counter / Bag Drop: You can always add bags at the full-service Delta ticket counter or the dedicated bag drop area.
   • Curbside SkyCap: If available, you can also add and check bags with a SkyCap agent outside the terminal (tips are customary).

Key Deadlines & Fees:

• Pre-Purchase Deadline: To get the lowest possible baggage fee, you must pay for your bags at least 24 hours before your scheduled departure. The fee is slightly higher if you pay at the airport.
• Absolute Deadline: Bags must be added and checked in at the airport no later than 45 minutes before scheduled departure for domestic flights and 60 minutes for international flights. These are strict cut-off times.
• Fee Difference: You