Originally Posted by
dhuey
Should be fine. If there's a delay, I'll bet you could talk your way on to the next DEN flight, even though it's a separate ticket, given it's a Star Alliance partner.
Worst case, United's "flat tire" rule would apply, where they will move you to the next available flight as long as you make it to the check-in counter no more than 2 hours after departure of your original flight. Odds are you'd end up in economy rather than F though...
However it's going to take a delay on the inbound to need that - GE + no bags + F on the connecting flight (thus Priority security) makes this an easy connection if you're even close to-time.