with: Turkish Airlines (TK1986, TK1980, TK1988, TK1990), Air New Zealand (NZ3203), British Airways (BA0678, BA0676), American Airlines (AA6613)
with: Turkish Airlines (TK1986, TK1980, TK1988, TK1990, TK1998), Air New Zealand (NZ3203), British Airways (BA0678), American Airlines (AA6613)
with: Germanwings (4U0460, 4U0468, 4U0464), Virgin Atlantic Airways (VS6482)
with: British Airways (BA0837, BA0829, BA0839, BA0835, BA0833, BA0831, BA0845), American Airlines (AA6767)
with: Etihad Airways (EY7984, EY7986, EY7980), Aer Lingus Irish Airlines (EI0208, EI0212, EI0202, EI3322), United Airlines (UA7662)
with: British Airways (BA1421, BA1423, BA1417, BA1415, BA1431, BA1419), American Airlines (AA6396), Japan Airlines (JL7126)
with: British Airways (BA0269, BA0283), Delta Air Lines (DL0019), IBERIA (IB4667), American Airlines (AA6180), Virgin Atlantic Airways (VS0023), Air Canada (AC5355), Deutsche Lufthansa (LH9342)
with: British Airways (BA0113, BA0177), IBERIA (IB4619, IB4617), United Airlines (UA0016, UA0045), Deutsche Lufthansa (LH7631), American Airlines (AA6229)
with: British Airways (BA0269, BA0283), Delta Air Lines (DL0019), IBERIA (IB4667), American Airlines (AA6180), Virgin Atlantic Airways (VS0023), Air Canada (AC5355), Deutsche Lufthansa (LH9342)
with: British Airways (BA0113, BA0177), IBERIA (IB4619, IB4617, IB4623), United Airlines (UA0016, UA0045), Deutsche Lufthansa (LH7631)
with: IBERIA (IB4669, IB4671), American Airlines (AA6188, AA6190), Finnair (AY5525, AY5527), British Airways (BA0285, BA0287)
with: Deutsche Lufthansa (LH7643, LH7645), United Airlines (UA0037, UA0109), Air Canada (AC2481, AC2483)
with: Deutsche Lufthansa (LH7647), United Airlines (UA0162), Air Canada (AC2489), Jet2.com (LS0085)
with: American Airlines (AA0211), IBERIA (IB4255), Finnair (AY5801), British Airways (BA1553), Etihad Airways (EY3053), Deutsche Lufthansa (LH7635), United Airlines (UA0080), Air Canada (AC2511)
with: United Airlines (UA0959, UA0929, UA0949), IBERIA (IB4677), Jet Airways (India) (9W5306), TAP Portugal (TP8639, TP8641), American Airlines (AA0087)
with: Emirates Airline (EK0863, EK0867), Qantas Airways (QF8863, QF8867), Oman Air (WY0601, WY0623), United Airways (Bangladesh) (4H0584, 4H0582)
with: Austrian Airlines (OS0458, OS0452, OS0456), Deutsche Lufthansa (LH6399), American Airlines (AA6497), airberlin (AB5054), British Airways (BA0696), Air Canada (AC6158)
with: Austrian Airlines (OS0458, OS0452, OS0456), Deutsche Lufthansa (LH6399), easyJet (U25359), American Airlines (AA6497), airberlin (AB5054), British Airways (BA0696)
with: Brussels Airlines (SN2050, SN2048, SN2046), US Airways (US5902), Deutsche Lufthansa (LH5605, LH5609), United Airlines (UA9910), Jet Airways (India) (9W6050)
with: Brussels Airlines (SN2064, SN2066), Deutsche Lufthansa (LH5625, LH5627), United Airlines (UA9926), bmi regional (BM1627, BM1629, BM1631)
History
United Airlines has its roots in the Varney Air Lines air mail service of Walter Varney. In 1926 the airline flew the first schedule airline service in the country's history.
During the September 11, 2001 terrorist attacks, two of hijacked airplanes were United Airlines aircraft. An airline industry slump, coupled with economic hardship, increasing oil prices, and higher labor costs, led to the company losing $2.14 billion in 2001.
In 2011 United merged with Continental Airlines.