There are lots of flights to Ottawa Airport (YOW) from most Canadian and several international cities.
We have arranged a discount on Air Canada:
- Promotion Code: 3HVR2KC1
- Promotion Code Rules
- The booking is to be made to the following city: Ottawa, YOW (ON)
- The travel period begins Friday, October 12, 2018 and ends Sunday, October 28, 2018.
- No discount will apply to Tango bookings for travel within Canada or between Canada and the U.S. For International travel (destinations outside North America), discounts apply to all fares including Tango.
- (Even if this discount does not save you any money please consider entering the code to activate the discount for those coming from overseas.)
There are multiple daily trains to Ottawa from Toronto and Montreal and cities in the Windsor-Quebec City corridor. Tickets and schedules can be found here: http://www.viarail.ca/en
Taking an uber is significantly cheaper than taking a taxi within Ottawa. Pickup is usually quick, especially from the airport. If you don't have an account, here is a referral link