The American airline company United Airlines based in Chicago, operates flights to over 210 destinations in the United States and 30 countries in Europe, Latin America, Asia and the Pacific region, and handles more than 3300 flights every day. In year 1997 the airline became a co-founder of the Star Alliance and a partner with a number of world leading airlines including Austrian Airlines, SAS Scandinavian Airlines, Lufthansa, LOT Polish Airlines, TAP Portugal, and others. The airline fleet consists of 399 airplanes of the type Airbus and Boeing.

According to the luggage requirements of the United Airlines company, the passengers are entitled to one piece of hand baggage up to 114 cm, plus one personal bag, for example a laptop. The registered luggage of the Economy Class passengers can be two pieces of 23 kg each, and for the Business Class passengers can be two pieces of 32 kg each, while the size should not exceed 158 cm.

Among the services offered by the airline company United Airlines is an online check-in in the period from 24 hours to 1 hour for domestic flights and 24 hours to 2 hours for international flights. In addition, the airline offers a loyalty program, connected with the collection of miles and many privileges.