Question : How many days should you spend in Portland if you're flying in from Allentown?
Answer : Of course you're not most people, but if you were, you'd stay roughly six days.
Question : Would you be willing to change your travel days if it saved you money?
Answer : Saturday is your lowest-cost day to fly in December. Flexibility is paramount when booking travel plans in order to keep costs down.
Question : Which airline is offering the cheapest round-trip flight from ABE to PWM?
Answer : Check out American Airlines, as they have been booking customers at lower fares than most.