Region of Waterloo International Airport or Kitchener/Waterloo Airport (IATA: YKF, ICAO: CYKF) is an international airport serving the Regional Municipality of Waterloo in Woolwich, Ontario, Canada, west of Toronto. It has year round daily flights to Edmonton, Vancouver, Victoria, Winnipeg, Calgary, Orlando, Halifax, Fort Lauderdale and Kelowna through Flair Airlines and WestJet. It also has seasonal flights to Cancun through Sunwing Airlines and Flair Airlines. In 2022, the airport ranked seventh-busiest in Canada by total aircraft movements and twentieth-busiest by passenger traffic.

The airport is classified as an airport of entry by Nav Canada and is staffed by the Canada Border Services Agency (CBSA). CBSA officers at this airport can handle any general aviation aircraft up to 180 people with two hours prior notice.

The terminal building has an international/domestic lounge. There are two separate baggage carousel, one for domestic and the other international. There are four gates (one international, one domestic arrivals, two domestic departures) at this terminal to handle scheduled flights. There is a licensed sit-down eating area and a vending area for people travelling through the airport.