For summer travel, fly nonstop from Denver to Orlando for $158 roundtrip on Southwest. If you're in central Florida and wish to visit Colorado this summer, the same price is available from Orlando to Denver.
Searching Southwest, I was able to find seats departing Denver DEN on Saturday, August 11, returning from Orlando MCO on Saturday, August 18.
Other dates are available for travel starting next week through mid-September.
Need a room in Orlando? Here's what's available from Hotelwatchdog for the mentioned dates above.