If you plan to visit Canada you might need a visitor visa. Check the Canadian Consulate's website to see if you need a visitor visa and if so, how to apply. Plan ahead, as processing can take approximately one month or longer. Applications are accepted online or by mail.
Citizens of many countries might also be required to provide biometrics (fingerprints and photograph) when applying for a visitor visa to Canada.
You must have a valid travel signature on your current I-20 or DS-2019 before you apply for a Canadian visa. Drop-off your I-20 or DS-2019 at the ISS front desk to get a travel signature. There is a one day turnaround to process the travel signature, so please plan ahead.
Transit through Canada
You might need a visa to transit through Canada even for a short stop in flight elsewhere. Check the Canadian Consulate's website to see if you need a visa to transit Canada.