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: 1,922
Yes, the first letter is the fare basis code.
Quick question: The itinerary you are talking about here:
DEN-SLC-LAX-ICN-SIN...
the whole thing is showing as Delta fare basis M?
If you use the ITA tool, it might be interesting to see what corresponding fare basis is being shown for the ICN-SIN segment that has a KE flight number...