Complex sentence: However, it is important to note that the Prime Minister does not charge flights to the MP budget, nor does Harper fly commercial as the Prime Minister has access to the CC-144 Challenger plane.
Split into simpler sentences: However, it is important to note that the Prime Minister does not directly pay for his flights the way other Members of Parliament do. The Prime Minister of Canada does not need to pay for commercial flights as they have access to the CC-144 Challenger plane.