The intense nature of airfare pricing has led to the term "fare war" to describe efforts by airlines to undercut other airlines on competitive routes. Through computers, new airfares can be published quickly and efficiently to the airlines' sales channels. For this purpose the airlines use the Airline Tariff Publishing Company (ATPCO), who distribute latest fares for more than 500 airlines to Computer Reservation Systems across the world.

Despite continuing efficiency improvements from the major aircraft manufacturers, the expanding demand for global air travel has resulted in growing greenhouse gas (GHG) emissions. Currently, the aviation sector, including US domestic and global international travel, make approximately 1.6 percent of global anthropogenic GHG emissions per annum. North America accounts for nearly 40 percent of the world's GHG emissions from aviation fuel use.[79]
When Condé Nast Traveller first appeared in 1997, Ibiza was trancing out many of you – so much so that it utterly failed to make the top 20 in our debut awards. This year the Balearics came second, for all-round good times; though when it comes to beaches and hotels you'd rather go the distance to the Maldives, and thought Malta best value for money. And while the appetite for Sicily's food was hearty, the Greek Islands hauled in first place overall thanks to its extraordinary scenery and people. Here are the 20 best islands in the world, as voted for by you.
Lefkada is the island that’s not an island. You can drive to it across the causeway from the mainland, but it feels every bit an island. Aristotle Onassis bought the satellite island of Skorpios here as his own bit of getaway paradise. Beaches, windsurfing, boat hire, good food and wine are all here and there are few built-up package resorts. The main tourist area is centred on Nydri.
Private jet is the best new way for VIPs to travel south: Casa Marina, A Waldorf Astoria Resort, now offers direct seaplane air service with Key West Seaplanes from Florida airports to the property’s private beach pier. Slightly farther north on Key Largo, Playa Largo Resort & Spa debuted last summer with signature Sunshine State coral reefs and sea glass, plus 144 rooms and suites, 10 secluded bungalows and a standalone luxury guesthouse.

Argostoli is the capital on the mid-west flank of the island and is not really a destination itself, that moniker falling to the contiguous beach scene running from Lourdata south eastward to Skala. While development might have caught up here by now, it should still be a pleasant beach scene and focus for a relaxing stay. The Melissani Cave on the east coast is a must attraction and while it can be visited on a day excursion from anywhere on Kefallonia the two villages or Agia Efthymia and Poros are low-key ‘resorts’ pulling in a regular crowd of travellers and may warrant a look-in. The port of Pesada (just west of Lourdata) is the home of the local ferry to Zakynthos (Zante).
The Dutch airline KLM made its first flight in 1920, and is the oldest continuously operating airline in the world. Established by aviator Albert Plesman,[11] it was immediately awarded a "Royal" predicate from Queen Wilhelmina.[12] Its first flight was from Croydon Airport, London to Amsterdam, using a leased Aircraft Transport and Travel DH-16, and carrying two British journalists and a number of newspapers. In 1921, KLM started scheduled services.
Bilateral agreements are based on the "freedoms of the air", a group of generalized traffic rights ranging from the freedom to overfly a country to the freedom to provide domestic flights within a country (a very rarely granted right known as cabotage). Most agreements permit airlines to fly from their home country to designated airports in the other country: some also extend the freedom to provide continuing service to a third country, or to another destination in the other country while carrying passengers from overseas. 

A complicating factor is that of origin-destination control ("O&D control"). Someone purchasing a ticket from Melbourne to Sydney (as an example) for A$200 is competing with someone else who wants to fly Melbourne to Los Angeles through Sydney on the same flight, and who is willing to pay A$1400. Should the airline prefer the $1400 passenger, or the $200 passenger plus a possible Sydney-Los Angeles passenger willing to pay $1300? Airlines have to make hundreds of thousands of similar pricing decisions daily.

Airlines often have a strong seasonality, with traffic low in Winter and peaking in Summer. In Europe the most extreme market are the Greek islands with July/August having more than ten times the winter traffic, as Jet2 is the most seasonal among low-cost carriers with July having seven times the January traffic, whereas legacy carriers are much less with only 85/115% variability.[73]
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