Originally Posted by
jetlikesdimsum
1_Is that enough time layover, especially in the winter season?
2_Will I still be able to change my itinerary for no cost?
Others have answered the question about the 90 minute connection time, but...
There likely are going to be a several more schedule changes between now and Dec. and if they change to a connection you can't make, you can change your itinerary at no cost.
One other comment -- you may have purchased your tickets too far out and the price is likely to come down the next few weeks -- particularly if you're traveling on Xmas day.
Bob H