Question : Which airline is offering the cheapest flight from LYS to BIO?
Answer : TAP Portugal is your best bet for finding that coveted low fare. They're offering fares as low as $168, while prices for other flights are as high as $174.
Question : How much should a trip from Lyon (LYS) to Bilbao (BIO) cost?
Answer : Ranging from $168 to $174, prices for LYS to BIO fluctuate much less than the majority of routes from France. Prices tend to be lower the further out you book.
Question : Is price more important than specific travel days for you?
Answer : In October, Thursday is your lowest-cost day to fly. Being flexible with your travel days garners even more savings during booking.
Question : How long do most people stay in Bilbao?
Answer : Of course you're not most people, but if you were, you'd stay roughly three days.