344 - 661 GBP
In general when looking for the cheapest flight to Colorado, try to book your flight during the month of February for the best deal.
In general, most flyers find the cheapest time to book a flight to Colorado is about 60 days prior.
On average, the cheapest flights to Colorado are found when departing on a Thursday. Try to avoid departing on a Sunday, as this is usually the most expensive day.
Generally, when visiting Colorado, evening flights represent the best value. afternoon flights are likely to have higher prices.