The cost of priority check-in varies widely between $15 and $60 per segment, depending on the airline and the "bundle" you choose. Most legacy carriers like United, Delta, and American do not sell priority check-in as a standalone product; instead, it is included in a package (such as United's "Premier Access") that also features priority security and boarding. Low-cost carriers like Frontier or Spirit often sell "Priority" bundles for around $20 to $35 that expedite your bag drop and boarding process. For many travelers, the "cost" is actually $0 if they hold a co-branded airline credit card or have attained the lowest tier of elite status. However, if you are purchasing it a la carte at the airport, it is usually at its most expensive. It is important to evaluate if the cost is worth it; if you are traveling with only a carry-on and checking in via a mobile app, priority check-in offers almost zero value, whereas it can save significant time if you are traveling with checked luggage during peak holiday periods.