Join Date: May 2002
Location: Pittsburgh
Programs: MR LT Titanium, AA LT PLT, UA SLV, Avis PreferredPlus, HH Gold, Hertz PC, National Executive, etc.
Posts: 31,643
I think there's a difference between "has scheduled flights" and "operating". As noted, technical documentation will list curfews/times when lights are off. Some airports shut down, others are still staffed but have no scheduled flights.
Btw - what's a "boost constraint"? Google couldn't help.