Frequent fliers who never get anywhere The Washington Post May 16, 2010
What if you're traveling for pleasure? If your trips are infrequent, you should stay on the sidelines, says Allison Danziger, director of TripAdvisor Flights. "One specific case is where a traveler would fly less often than the frequent flier mile expiration window for their program," she added. "Frequent flier miles on most carriers expire after one to three years of inactivity." In other words, your miles would expire before you could use them, obviously negating any benefit.