Charlotte (CLT): free WiFi, limited lounges.
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Yes. Free WiFi is unlimited across the airport.
Lounge quality here is limited. It's usually not worth counting on a lounge day pass here — a quiet gate area or sit-down restaurant is a more reliable plan.
Rocking chairs scattered throughout the concourses are a low-key signature feature.
It depends on how long you have — check the amenity above, and otherwise treat it as a functional connection rather than a destination in itself.