Originally Posted by
BDL-FRA
...Are you suggesting that we simply wing it and figure that US will rebook us on a later flight? We would be standby though, with a high likelihood of middle seats, but it would avoid us from paying any fees!
Well, it depends on how much peace of mind is worth to you

Pay the change fees for a new confirmed later flight, or take a chance, endure some probable discomfort and save some $$. You may even luck out if your outbound US flight is delayed considerably!
I know that, as a US FF on US metal, US folks would take care of me if I miss my flight, and even upgrade me up front if there's room on a later flight. Knowing that, I'm more willing to take a chance. It's been a long time since I've been in SJU, and I don't know what they can do to accomodate non-US FFs there...