The big trend in the airline industry is to customize prices and availabilities to each individual request. Your location (IP address), your frequent flyer stat

The big trend in the airline industry is to customize prices and availabilities to each individual request. Your location (IP address), your frequent flyer status (if logged in), the competitor's current prices, the distribution channel (e.g. web or travel agent, GDS) will all have an influence on what is presented to you. Meta search engines have had a difficult time reporting accurate fares even in the past when it was much simpler. In the future, it'll be almost impossible.