I opted for pre check as I travel a lot. I did not know, however, that it was airline specific, not available for all domestic flights. Southwest is my go to airline, but occasionally, I will be on a charter flight. Charter flights do not participate in the TSA pre check program. Thought this was an airport security service . Still love it, as I have always been able to get through security quickly, but do not understand not being vetted for all flights??
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