Question : Do prices fluctuate more for this route than others?
Answer : Flight prices fluctuate more than most routes from Portugal for LIS to DCA. They range from $861 to $2,692. Prices tend to be lower the further out you book.
Question : Who's offering the cheapest round-trip flight to Ronald Reagan National Airport (DCA) over the coming months?
Answer : KLM is the leader in keeping costs down for their passengers over the next three months. Bookings are being made at just $861, which is quite a deal when compared to the high-end bookings of $2,692.
Question : How long do most people visit Washington?
Answer : Of course you're not most people, but if you were, you'd stay roughly nine days.
Question : If your plans are flexible, have you considered changing your departure day?
Answer : Saturday is your lowest-cost day to fly in the month of March. Having flexibility in your travel plans means you can save more, so be sure to plan ahead when possible.