Question : How long do most people stay in Detroit?
Answer : Of course you're not most people, but if you were, you'd stay roughly eight days.
Question : What is the cheapest round-trip ticket you can get to Detroit?
Answer : Air Canada is your best bet for finding that coveted low fare. They're offering fares as low as $1,086, while prices for other flights are as high as $3,254.
Question : Is price more important than specific travel days for you?
Answer : The lowest-cost day to fly in July is Thursday. Being flexible with your travel days garners even more savings during booking.
Question : Are you paying the cheapest or highest price for your ticket to Detroit?
Answer : Flight prices change much more than most routes from Portugal for LIS to DTW. They vary anywhere from $1,086 to $3,254. Remember, the sooner you book, the more you'll be able to save.