FlyerTalk Forums - View Single Post - Checking for Business Class upgrade availability
Old Oct 18, 2018, 8:27 am
  #4  
Lefly
 
Join Date: May 2014
Location: BRU
Programs: BA GGL, TK E (*G), ITA exec
Posts: 4,100
If I read it correctly the class has to be J
In Business Class, if there is space in the "J" class and you have a confirmed reservation, you can upgrade. You can upgrade up to 24 hours before flight departure via one of our sales offices or call center.

from https://www.turkishairlines.com/en-b...rds/index.html > upgrades
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