ITA maxdur -redeye -prop syntax and usage question
I'm trying to price out SEA-NAS, and want to eliminate redeyes and prop planes, with a maximum duration of 12 hours transit time.
Why doesn't SEA:: / -redeye, -prop work? The syntax is accepted, but overnight and prop planes are prominent in the list!
And why does SEA:: / maxdur 720 give you NO flights even on one way itineraries, but SEA:: / maxdur 1400 gives you flights, even though there are many flights of less than 12 hours?
And how do you put all of this together on a round trip itinerary, allowing redeye one direction, but not the other?