Should be no problem to get there at 4:15
I was recently there at 4:15am for a 6am flight. I believe as long as you have an early flight they will be open
JoAnn I believe it is open 24/7 as I have been there pretty late at night and early in the AM and always open. And you dont need to be there 2 hours early. With a flight so early you will have almost no wait at security and the walks to even the ends of each concorse only take a few minutes.
I don't know but if you are supposed to be there 2hrs before flight they should be open
Thanks! Your answer is awaiting moderation.