Attention SJC Fliers your Boarding Pass may say Gate C12 when Frontier Boards out of Gate C5 . This is a major error. From the ticket counter make a left and head straight through security Gate C5 will be on your right by United.

I can imagine two unexperienced fliers going to Gate C12 and no F9.

Also for the first F9 SJC-DEN Flight security opens at 5:00AM and F9 opens at 4:30.

Thanks.