Delta and Southwest offer curbside check-in. A standard tip for the skycap is $1.00 per bag; more if your luggage is very heavy or if you utilize extra services such as escort or wheelchair assistance.

Curbside check-in at Delta is a service provided by skycaps—who are often third-party contractors rather than direct airline employees—and tipping is both expected and customary for their convenience. The standard tip for curbside check-in is $2 to $5 per bag. If you are checking a single suitcase, $2 is generally acceptable, but $5 is a more generous "gold standard" for better service or if the agent helps you avoid a long line inside. For families with multiple bags, a flat tip of $10 to $20 is appropriate depending on the total weight and complexity of the check-in. It is important to note that any "service fees" charged by the airline for curbside use are separate from these tips and do not go to the skycaps. Tipping is a primary source of income for these workers, who provide a premium service by handling heavy lifting and printing tags so you can bypass the main terminal crowds. Carrying a few small bills in your pocket ensures you can complete the transaction smoothly as soon as your bags are tagged and taken to the conveyor.