When looking to book a flight, many consumers find it easier to peruse third-party comparison sites such as Kayak, Orbitz or Expedia where airfare can be easily compared among different airlines. While airlines have had their share of issues with sites that often lead to some fares disappearing, one legislator is calling for a federal investigation over allegations that some carriers completely withhold information from such travel sites in an attempt to block passengers from finding the best price possible. [More]