Question : How long are most people's visits to Lisbon when they fly in from Spokane?
Answer : Travelers from GEG to LIS stay 15 days on average.
Question : Is price more important than specific travel days for you?
Answer : In December, Friday is your cheapest day to fly. Being flexible with your travel days garners you even more savings during your booking.
Question : Do prices change more for this route than others?
Answer : Flight prices for GEG to LIS fluctuate a lot more than the majority of routes. Prices tend to be lower the further out you book.