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.
WestJet is the largest carrier at Edmonton International Airport, holding more than 50% of the market share. Edmonton is also a focus city for flag carrier Air Canada and Air Canada Express, which, combined, operate to 12 destinations. Canadian North and First Air connect their northern networks through Edmonton.