The confusion is even worse if you want to fly internationally. Official fares to most countries are set via a treaty organization called the IATA, so most computer systems list only IATA fares for international flights. It's easy to find entirely legal ``consolidator'' tickets sold for considerably less than the official price, however, so an online or offline agent is extremely useful for getting the best price. The airlines also can have some impressive online offers on their web sites.
Travel in the Middle Ages offered hardships and challenges, however, it was important to the economy and to society. The wholesale sector depended (for example) on merchants dealing with/through caravans or sea-voyagers, end-user retailing often demanded the services of many itinerant peddlers wandering from village to hamlet, gyrovagues (Wandering Monks) and wandering friars brought theology and pastoral support to neglected areas, travelling minstrels practiced the never-ending tour, and armies ranged far and wide in various crusades and in sundry other wars. Pilgrimages were common in both the European and Islamic world and involved streams of travellers both locally (Canterbury Tales-style) and internationally.
NAV CANADA also publishes the Canadian Airport Charts (airport diagrams) airport diagrams publication. The information in the Canadian Airport Charts provides pictorial displays of Canadian airport manoeuvring areas found in the Canada Air Pilot or the military GPH 200, and may be reproduced for the sole purpose of assisting pilots during aircraft ground movement operations. Up-to-date information on flight planning procedures and airport services, including fuel, lighting and local prohibitions or procedures is found in the Canada Flight Supplement.
The Peterborough region has a vibrant and expanding aerospace and aviation sector, including a variety of operations located at or in close proximity to Peterborough’s airport and aerospace industrial park. Situated with easy access to Montreal, Toronto, and the United States border, the Peterborough region provides a strategic advantage for businesses interested in expanding or relocating. Supporting the aviation and aerospace industry is a high priority for the local community with ongoing investment and infrastructure improvements in this important sector.
Four giant airline computer systems in the United States handle nearly all the airline reservations in the country. (They're known as CRSs, for computer reservations systems, or more often now GDS for global distribution systems.) Although each airline has a ``home'' CRS, the systems are all interlinked so that you can, with few exceptions, buy tickets for any airline from any CRS. The dominant systems in the U.S. are Sabre (home to American and US Airways), Galileo (home to United), Worldspan (home to Delta, Northwest), and Amadeus (many European lines.) The company that owned Galileo and Orbitz recently bought Worldspan, so the two GDS will presumably be merged. Many of the low-price start-up airlines don't participate in any of these systems but have their own Web sites where you can check flights and buy tickets. Southwest, the largest and oldest of the low-price airlines, doesn't participate, either. Southwest's web site gets car and hotel info from Galileo, but the info seems not to flow the other way. Orbitz one of the big three online travel agencies, runs its own system which is "direct connect" linked directly to many of the airlines.