"Peter R." wrote in message
In watching a freezing rain/snow storm move from the midwest up to the
northeast US today, I again wonder how the airlines deal with freezing
rain. Are many flights canceled during a freezing rain storm or is it
business as usual?

If the runway is useable, it's business as usual, except for delays incurred
for ground de-icing and inclimate weather.

Does a deicing on the ground and anti-icing equipment on the aircraft
provide the protection needed to fly into or out of freezing rain
conditions for the airline aircraft?

For jets, almost always. Airbus put wing anti-ice on the outer half of the
A-320 wings only because the FAA wouldn't sign-off on the design if they
didn't. The B-727 doesn't have anti-ice on the tail surfaces because ice
doesn't accumulate there to any appreciable degree. The MD-80 is approved to
take-off without performance penalties with an eight inch of frost on the
underside of the wing (clear ice on the topside of the -80 wing is a serious
problem but doesn't happen in flight).

D.