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.
The U.S. airline industry is chronically in dreadful shape, with Aloha, ATA, Skybus, Eos, Silverjet, Maxjet, and now Zoom having shut down. Midwest merged into Frontier. American went bankrupt and the corpse merged into US Airways, although the surviving company is still called American. Sun Country went bankrupt but is still flying, Frontier went bankrupt but seems to be surviving as part of regional carrier Republic, and most of the remaining airlines are hanging on with a combination of somewhat higher fares (much higer for trans-Atlantic) and very full planes. The weak economy has kept them from raising fares as much as they want, but they're not passing on the recent lower fuel prices. Southwest and Airtran, two relatively healthy low-fare carriers have merged, with the surviving airline Southwest with more east coast and international routes.
Reasons for traveling include recreation, tourism or vacationing, research travel, the gathering of information, visiting people, volunteer travel for charity, migration to begin life somewhere else, religious pilgrimages and mission trips, business travel, trade, commuting, and other reasons, such as to obtain health care or waging or fleeing war or for the enjoyment of traveling. Travellers may use human-powered transport such as walking or bicycling; or vehicles, such as public transport, automobiles, trains and airplanes.
Travel dates back to antiquity where wealthy Greeks and Romans would travel for leisure to their summer homes and villas in cities such as Pompeii and Baiae. While early travel tended to be slower, more dangerous, and more dominated by trade and migration, cultural and technological advances over many years have tended to mean that travel has become easier and more accessible. Mankind has come a long way in transportation since Christopher Columbus sailed to the new world from Spain in 1492, an expedition which took over 10 weeks to arrive at the final destination; to the 21st century where aircraft allow travel from Spain to the United States overnight.
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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.
The first step to an international trip is to read our Traveler’s Checklist to find out things to consider before you go. Pay special attention to our safety and security information and assess for yourself the risk of traveling to a particular country or region. Some U.S. citizens with special considerations – such as students, women, and LGBTI travelers – may face additional challenges when abroad. If you do decide to travel, make a plan for what to do if something goes wrong overseas.
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Other changes include: some airports have stopped curb-side baggage check, anything vaguely resembling a knife or lighter may or may not be confiscated (although lighters suddenly stopped being dangerous a year ago), you're sometimes only allowed one carry-on plus a purse, briefcase, diaper bag or the like, non-passengers aren't allowed past security, all passengers must have a document that looks like a boarding pass at most airports to get past security, you may have to put your toothpaste and shampoo in a baggie that may have to be a one quart size, some parking areas close to terminals are closed. But check-in clerks no longer ask you whether you packed your own suitcase.
After reaching Ouagadougou, the next stage of their journey would have seen them head to a reforestation project in Togo, which is considered safer by GAC. But getting there overland would have required a journey through another red zone in southern Burkina Faso. ("Avoid all travel to 40 km within borders of Benin and Togo due to the threat of banditry and terrorism.")
A travel warning, travel alert, or travel advisory is an official warning statement issued by a government agency to provide information about the relative safety of travelling to or visiting one or more specific foreign countries or destinations. The purpose is to enable travelers to make an informed decision about a particular travel destination, and to help travellers prepare adequately for what may be encountered on their trip. In the United States, travel warnings are issued by the Department of State and are often called warden messages.
Authorities emphasize the importance of taking precautions to ensure travel safety. When traveling abroad, the odds favor a safe and incident-free trip, however, travelers can be subject to difficulties, crime and violence. Some safety considerations include being aware of one's surroundings, avoiding being the target of a crime, leaving copies of one's passport and itinerary information with trusted people, obtaining medical insurance valid in the country being visited and registering with one's national embassy when arriving in a foreign country. Many countries do not recognize drivers' licenses from other countries; however most countries accept international driving permits. Automobile insurance policies issued in one's own country are often invalid in foreign countries, and it is often a requirement to obtain temporary auto insurance valid in the country being visited. It is also advisable to become oriented with the driving-rules and -regulations of destination countries. Wearing a seat belt is highly advisable for safety reasons; many countries have penalties for violating seatbelt laws.