[jpalomaki]

Might be valuable if you can monetize the information that this person is looking to travel to certain location at certain time.

To my knowledge, there’s different systems that are collecting this kind of information and then driving highly targeted marketing based on that.

[fsckboy]

this is a very good answer, sells hotel ads, car rentals, restaurants, casinos, stage shows, theme parks...

[quickthrower2]

Sites already do this on a commission basis in the same flow which would be more money than running ads.