I have a flight booked on a thru ticket to SFO that starts in Ireland with Aer Lingus to LHR and onto SFO. Unusually the flight number UA.COM has booked me on is an EI flight number not a UA codeshare flight number. My question if I miss the EI flight will my UA flight get cancelled. I know on a UA codeshare it would but have never been ticketed on EI flight number.

Thanks