True, but the 767/57 fleet was never considered "wide body" at the former UAL.

Since the DC10 left DEN there were a few times when the contractural calculation (yes there was a clause in the contract at one time to calculate the need for a base) would have allowed or required a "wide body" base (777) in DEN, but the ALPA politics would not support such a move. Why, you might ask?

The answer is for wide body to come to DEN would mean a reduction in another base (SFO or LAX in the day) and no Council would support reduction in flying from their base.

The only consistent "wide body" flying now in DEN is the 787 DEN - NRT flight and that has swapped between IAH and SFO with IAH claiming it the most often.

For the 787 to be based in DEN these days it would require, in addition to NRT, say HNL and additional domestic to work.