1 Pain is located behind one eye or in the eye region, without changing sides.  Pain lasts a short time, generally 30 to 90 minutes (but can last for three hours); the headache will disappear, only to recur later that day (most sufferers get one to three headaches and some up to eight per day during a cluster period).
YYC Calgary International Airport, originally named McCall Field (IATA: YYC, ICAO: CYYC), is the international airport that serves Calgary, Alberta, Canada and the surrounding region; it is situated approximately 17 km (11 mi) northeast of downtown Calgary.
Air Canada is your best choice to Vancouver with the most non-stop flights and access from over 190 cities worldwide. â See Getting to/from the Airport for additional information if departing via Vancouver International Airport. However, if youâre flying into Vancouver from a short-haul, domestic destination such as Victoria or other parts of Vancouver Island, the Gulf Islands or Whistler, you can also travel via scheduled floatplane or helicopter services.