In general, when looking for the cheapest flight to Denver, try to choose a flight departing in December for the best deal.
In general, most flyers find the cheapest time to book a flight to Denver is about 48 days prior.
On average, the cheapest flights to Denver are found when departing on a Tuesday. Try to avoid departing on a Sunday, as this is usually the most expensive day.
Generally, when visiting Denver, midday flights represent the best value. morning flights are likely to have higher prices.