About two years ago, an economics professor in Maine thanked me for the free travel advice that I had unknowingly given him through my posts on a Web site called FlyerTalk.com.

While my experience on the fly has taught me a great deal, little did the professor know that most of what I was sharing online I had learned from FlyerTalk. The site, which just celebrated 10 years and 10 million posts, has helped thousands of travelers plan trips that might have seemed overwhelming at first, deal calmly with delays or cancellations and maximize benefits from airline and hotel loyalty programs…