Absolutely; you should always check in online even if you have luggage to drop off. Checking in via the airline’s app or website (usually 24 hours before departure) allows you to secure your preferred seat early and receive your boarding pass digitally. More importantly, most airports now feature "Self-Service Bag Drop" kiosks. If you have already checked in online, you can simply scan your mobile boarding pass at these kiosks, print your own luggage tags, and drop your bag on the belt in a fraction of the time it takes to wait in a full-service check-in line. Some airlines also charge a "check-in fee" at the airport counter for certain economy fares, which you avoid by doing it yourself. Online check-in also serves as a safeguard; if you are running slightly late to the airport, being "checked in" prevents the airline from potentially giving your seat away to a standby passenger.