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The first airline to use the Boeing 747 was Pan-Am airlines on January 21, 1970. The flight was an international, oversea flight from New York to London.
Airbus A380 made its first flight on April, 27; 2005. however, the aircraft entered the commercial service in the year 2007, Singapore airline was the first airline to operate an A380.
United Airlines
The Dutch airline KLM was started in 1909 and is still in service today was the first airline started.
Well the first airline to use jets was.... http://www.answerblip.com/what-was-the-first-commercial-airline-to-use-jet-airplanes
Antony Habersack Jannus, more familiarly known as Tony Jannus (1889-October 12, 1916), was an early American pilot whose aerial exploits were widely publicized in aviation's pre-World War I period.In 1912, he flew the first airplane from which a parachute jump was made. Jannus was also the first airline pilot, having pioneered the inaugural flight of the St. Petersburg, Tampa Airboat Line on January 1, 1914, the first scheduled commercial airline flight in the world using heavier-than-air aircraft
1923
The first A380 commercial flight was on 25 October 2007, when Singapore Airlines flew from Singapore to Sydney.
Valuair is an airline service that offers low-cost flights and services. The airline is based in Singapore and launched its first flight in May of 2004.
American Export Airlines
It depends what airline you are flying, if you are flying two different airlines, then you check in with the first airline then when you get to DC you check in with the second airline. If you booked both flights on one package and its two different airlines, then check-in at the airport with the first airline. If its a scheduled stop then check-in as normal at the airport OR online
PIA (pakistan International Airline