I'm flying out of ORD->IAD->LHR and the connection in IAD is 1 hour. I've heard ORD is notorious for delays and it looks like it may be snowing when I'm flying out, so I'm really worried I may miss my connection. Added it's the last flight out to LHR for that night.

Should I be worried? Also, I was thinking of trying to go on standby on an earlier flight. I checked the seats and it's pretty full with only 7 seats left (and 1 week to go). Are my chances pretty slim to get on that plane (for 2 people) Thanks for your advise.

I'm flying United/BMI which I have no status on, but I am Platinum on AA. Will that help any?