This year marks the 100th anniversary of the first commercial flight. It happened on the 30th of June 1914 and was a domestic flight in Russia starting in St.Peretsburg and having Kiev as its destination. Food was served to the 4 passengers on board.
The flight was conducted in a Sikorskij “Ilja Muromets” 4-engine double-decker constructed at Russo-Baltic Carriage Factory (RBVZ) in Riga in 1913.
http://en.wikipedia.org/wiki/Sikorsky_Ilya_Muromets
From 30 June to 12 July 1914, it set a world record by making a trip from Saint Petersburg to Kiev, a distance of some 1200 km, and back. The first leg took 14 hours and 38 minutes, with one landing for fuel at Orsha, and the return one, with a fuel stop at Novosokolniki, took even less time, about 13 hours.
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During an Imperial military review at Krasnoye Selo in July, Nicholas II decorated and christened the Ilya Muromets Type B Military Prototype, No. 128, the “Kievsky.”