Question : Interested in traveling in the next 30 days and want to get the lowest fare?
Answer : Since low prices are preferred, look at Mar 5th. As of Feb 20th, it's showing the cheapest ticket sales at $2,077. That is 14% below the average price for this route, so you can spend that extra money on a fun experience in Washington.
Question : Is the price you found a good deal?
Answer : Flight prices are fluctuating less for this route than most routes from Portugal, as they're ranging from $1,931 to $2,876. However, the sooner you book, the better price you tend to get.
Question : How many days should you spend in Washington?
Answer : Passengers from OPO to DCA stay about one week on average.
Question : If your plans are flexible, have you considered changing your departure day?
Answer : The lowest-cost day to fly in March is Sunday. Having flexibility in your travel plans means you can save more, so be sure to plan ahead when possible.