FlyerTalk Forums - View Single Post - Crediting Aer Lingus (EI) flights to United (UA) to Earn MileagePlus Miles?
Old Oct 24, 2013 | 12:01 pm
  #15  
sbm12
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No.

You might be able to check in on united.com at 24 hours prior to the BOS-LAX segment but the initial check-in for the SNN-BOS has to happen with EI, not UA.
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