noun
airfare
Refers to the fare for air travel; a straightforward compound noun.
東京から大阪までの航空運賃はいくらですか。
How much is the airfare from Tokyo to Osaka?
運賃 is a general term for transportation fare (bus, train, etc.), while 航空運賃 specifically means airfare.
Compound of 航空 (aviation) and 運賃 (fare).