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Bad news for frequent fliers: The small movement to make it easier to cash in miles and points for seats is ending, and airlines may keep getting even stingier.
An annual survey of availability of the type of frequent-flier ticket most travelers use shows a drop to 72% this year from 77% in 2016. Many foreign airlines known for superior service and seating have gotten more tightfisted with award seats. Availability on U.S. airlines actually improved, according to consulting firm IdeaWorks, and overall U.S. airlines…