Generally speaking, one way international fares are quite prohibitive and its usually better to buy a return fare. However, Qatar Airways has launched one way international fares and prices from Montreal, Canada start from just $685.
Here are some sample fares in economy and these are good if you want to position yourself in a city and then continue using points and miles.
Montreal
to Bangalore $685
to Nairobi $745
to Delhi $760
to Colombo $895
to Johannesburg $920
to Mumbai $955
For more destinations click here.
Conditions:
Book by July 22, 2018 for travel from August 01, 2018 through October 31, 2018.
14 day advance purchase required.