90 minutes should be good. Theres also a DIA app and you can see which security line is the shortest, that can save 20 minutes sometimes
Mind you, I don't fly very often or on holidays and such, nor do I check my baggage (I just take a small carry-on), but I'm going to guess an hour and a half, even with long security lines. DIA always has a lot of TSA people working their lines, and they keep everything really moving.
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