Hi! I recently had a chance to try out the Frontier Airlines SFO Terminal and thought I would give my opinions. It's a small space, and there's not much activity when it comes to restaurants or lounges. That being said, it was immaculately clean and not very busy, which I appreciated. Counter staff were courteous, though the bag claim was slow. Security moved quickly, and the gate staff handled boarding in an organized way. It’s bare bones, but efficient. If you’re traveling on a budget and keep expectations in check, this terminal is perfectly fine. Bring snacks, charge your phone, and you’re good. visit us : https://www.flyhighterminal.com/frontier-airlines/frontier-airlines-sfo-terminal-san-francisco-international-airport/