As a Denverite, I think we need more international flights. We have a good start with Lufthansa to FRA and MUC, British Airways to LHR, Icelandair to KEF, United to Tokyo, plus all of the other Mexican/Canadian/Costa Rican etc destinations, alongside Frontier, Southwest, Volaris, Aero Mexico, Air Canada etc.
Having grown up here, I've seen a lot of growth. I think with the way Denver is growing, we could soon support more international flights. DXB on Emirates is highly likely, and also someone flying to AMS and or CDG is too. We will see!