Join Date: Apr 2005
Location: CMH, sometimes AVP, formerly down the Shore
Programs: UA 1K/3MM, AA EXP/3MM, DL MM, former fan of TWA
Posts: 1,920
I find that I sometimes get strange sequence numbers if my flight is, for example, a continuation of a flight that originated in Europe. So, if I am checking in for the EWR-SFO portion of CO 41 (which operates FCO-EWR-SFO), I sometimes get a higher-than expected sequence number. Just one for the OP to keep in mind if he/she sees an unexpected number.