Question : Which airline has been on time to Denver International Airport (DEN) from Portland International Airport (PDX) the most?
Answer : The current leader is Delta Air Lines with a 100% on-time rate. Stick to Delta Air Lines and you won't spend more time in airports than you have to. Hopefully they keep that perfect record alive.
Question : How often is the price changing when booking a trip from Portland International Airport (PDX) to Denver International Airport (DEN)?
Answer : Prices for this trip tend to change a lot more than others. However, the sooner you book, the better price you tend to get.
Question : How many days should you spend in Denver if you're flying in from Portland?
Answer : Of course you're not most people, but if you were, you'd stay roughly six days.
Question : If your plans are flexible, have you considered changing your departure day?
Answer : For the month of December, the cheapest day to fly is Tuesday. Having flexibility in your travel plans means you can save, so be sure to plan ahead when possible.