Originally Posted by
MD/DC Flyer
Also if you change the carrier even if the O/D stays the same.
I recently changed (online) a UA saver award from Salzburg--VIE--MUC--IAD to Salzburg--VIE--IAD. The VIE--MUC--IAD flights were to have been on LH, and the new flight is entirely on OS. I was not charged a fee.