How strict is Frontier with personal items? TL;DR: Frontier's Personal Item Crackdown In the hierarchy of strict baggage policies, Frontier Airlines is a notable enforcer. A survey by Upgraded ...

Often the single heaviest item is a laptop. This should be carried as a personal item when checking in or boarding a plane.

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While most airlines don't have weight restrictions on personal items, some have size limits. American Airlines and Frontier, for example, both prohibit personal items larger than 18 x 14 x 8 inches.