u/1sun_

Hello everyone! I'll be taking my first solo international flight and I am wondering how GE for San Diego. I have a Sentri pass that i use to go thorough the border, do I have to take my card with me? Also, since I have my card, is there any extra documentation i have to fill out specific to flying? What is the process at the airport? any fees?

Bonus question,

I'll be flying united and hope to bring a carry-on plus a personal item after I booked I noticed my arrival flight says united economy (L) and my departure United economy (S) is there a difference? will I still be allowed a carry-on?