Question : Should you take that vacation to Lisbon in the next 30 days?
Answer : Since low prices are preferred, look at February 6th. As of January 16th, the cheapest ticket sales are coming in 27% below the average price for this route, so you can spend that extra money on an adventure rather than the flight.
Question : How many days should you spend in Lisbon if you're flying in from Detroit?
Answer : Of course you're not most people, but if you were, you'd stay roughly eight days.
Question : Will you do what it takes to get the absolute lowest-cost flight?
Answer : The cheapest day to fly in February is Friday. Having flexibility in your travel plans means you can save, so be sure to plan ahead when possible.
Question : Do prices fluctuate more for this route than others?
Answer : Flight prices for DTW to LIS change much more than most. Prices tend to be lower the further out you book.