Which code corresponds to the airport in Deer Lake, NL?

The airport code that corresponds to the airport in Deer Lake, Newfoundland and Labrador, is indeed YDF. Each airport in Canada is assigned a unique two-letter followed by a two-letter code, where the initial letter designates the region or the type of airport, in this case, Deer Lake Regional Airport uses YDF as its designator.

The context for the other codes is helpful for understanding this designation: YFC corresponds to Moncton International Airport in New Brunswick, YEG refers to Edmonton International Airport in Alberta, and YYG is the code for Charlottetown Airport in Prince Edward Island. Recognizing these codes helps to delineate the geographical locations and the specific airports they represent across Canada. Thus, the choice of YDF is accurate as it uniquely identifies Deer Lake's airport.