Where I can get historical jet fuels prices? I would like to analyze jet fuels prices in 2014.

Where can I get jet fuel prices for 2014, only in USA and Russia?

As there are different types of fuels, it would be okay to get prices for one (believe, trends are the same) or for all types.
U.S. Energy Information Administration keeps tabs on most refined and crude prices including kerosene-type jet fuel. For those who hail from metric units' land, these are in dollars per gallon.