Hello. To begin, sorry if this is in the wrong section. I'm new

I'm on the verge of purchasing my first MR for UA and I wanted to clarify some things first. I have used the phone lock to secure myself a day or two before pulling the trigger.

First, I'm on the LAX-BAH run (11/16-11/23). I'm based out of FLL, though. I altered my return to be BAH-MIA (via LAX). On the outgoing, I am looking at a one-way FLL-LAX flight on 11/15 to round out my itinerary.

If I am unable to make the LAX flight, because of an issue with my FLL flight, will UA attempt to accommodate me, or just cancel the ticket? I would imagine they would accommodate me, but most likely alter the itinerary somehow. This might bump my cpm, but at least I wouldn't be SOL.

That the tickets aren't on the same itinerary is what concerns me. Which way will this go? I may change my LAX outbound to later in the day, just in case, but thought it would be nice to know either way.

Second, I don't want to spend a week in BAH. A day or two will be sufficient for me. I have found some great fares from BAH using TK. I'm allotting a day or two on either side of the nested itinerary. However, what if a freak blizzard should hit, and I'm stranded somewhere for 5 days? I will eventually get back to BAH, but my outgoing will be long gone.

Given it is one big star-alliance, will I be accommodated? Again, these are different itineraries, hence my concern.

Note, I've made sure the TK are all mile earning.

Sorry for such a lengthy post! I just wanted to avoid bungling my first MR and feeling like an idiot.