How to Find Cheapest Business Class Flights

In order to find the cheapest business class fares you can, it makes sense to be flexible on dates and destinations.
Airlines are far more likely to discount departing midweek or for off-peak seasons.
Use a flight comparison tool (enter the flight details and check the comparison for business class travel options) such as Google Flights, Skyscanner, or Kayak and check the fare trend.
Most airlines fare familes are booked out 3-6 months in advance, so if some flexibility and a wait until the last minute is possible, you may find a good price.
It would not be a bad way to use their timeshare; don't forget to look at airlines like Qatar Airways, Emirates, or Turkish airlines which have a number of promotional pricing.