Hello! We made use of Delta's online check-in option, which is offered 24 hours prior to departure. It streamlined our process at the Delta Airlines DEN Terminal since we were able to choose seats and pay for checked bags ahead of time. It saved us time at the check-in desk and eliminated any last-minute anxiety. We also ensured our bags complied with Delta's baggage requirements to prevent extra charges, which was reassuring. Overall, the experience was simple and streamlined, and it set us off on a positive note for our trip!