Wow, am I ever glad I asked. Thank you all so very much for weighing in with really excellent advice. My new plan is instead of taking the RyanAir flight to LIS to travel directly to Faro via Aer Lingus departing DUB at 6:20.

So my window for connection has become even tighter, eek! But given that I won't have to go landside, this is probably doable, correct?

My BOS-DUB flight was booked on EI via BA using Avios. If the connection to Faro is feasible, would I be able to pair the two flights on a single ticket or add the second leg to my existing ticket? I'd like to get the protection from a delay on the first leg mentioned by IrishGuy, but not sure how to go about this. My strong preference would be to pay cash for the flight to Faro.

Thanks, you guys rock!