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Air Canada is the official Canadian airline for this event, offering special discounts to delegates attending the 2024 COS Annual Meeting & Exhibition for travel to and from Toronto, Ontario between Thursday, May 23, 2024, and ends Sunday, June 9, 2024.

The promotion code GWEK2CH1 must be entered during online booking. To book a flight with your promotion code, access aircanada.com and enter your promotion code in the Promotion Code Box.


Applicable Rules: 

• The booking is to be made to the following city: Toronto All Airports (YTZ,YYZ) (ON)

• The travel period begins Thursday, May 23, 2024, and ends Sunday, June 9, 2024. 

• Travel is valid Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday. 

• For North America: 5% applies on standard fares, 10% on flex fares & higher.

• For International Travel: 10% on standard fares & higher. 

If the Promotion Code is not entered or is entered incorrectly, the Discounts will not be applied to the booking.




WestJet is able to offer 5% off Econo* and 10% off EconoFlex and Premium fares for travel within Canada and 2% off Econo*, 5% off EconoFlex and 10% off Premium base fares for guests travelling Trans-border. No discount will apply to Basic or Business class bookings.To take advantage of this offer, you will need the discount code listed. Please visit www.westjet.com/conventions to make a booking online.


Applicable Rules

• The booking is to be made to the following city: Toronto 

• The travel period begins: 05/23/2024

•The travel period ends: 06/09/2024

• No discount will apply to Basic or Business class bookings. 

Coupon Code: Guest web/Travel Agent web: 9U2V1YT

Promo Code: Travel Agent GDS only: YBG27




VIA Rail Canada is pleased to offer the following fare discounts for the 2024 COS Annual Meeting & Exhibition:


May 27th  2024  to  June 4th  2024


From all stations throughout the VIA system to Toronto, Ontario and return.


Fare applies to a maximum of two passengers per booking. 

One complimentary stopover is allowed at no additional charge.

For travel on all fare plans in Business class, the first stopover is allowed at no additional
charge, provided that this stopover takes place in Toronto, Montréal or Ottawa only.


10% off the best available fare in Economy, Economy Plus, Business, Business Plus, Sleeper class. "Subject to the conditions and restrictions of the fare plan to which the additional discount is being applied."


Discount does not apply in any Escape fares and Prestige Class.


Participants must reference the event’s VIA convention corporate code: 14497

For a list of fare and schedules, please visit the Via Rail website




Porter Airlines is proud to offer a up to 10% discount on available base fares (with the exception of the lowest class fare during a public seat sale) for travel to and from the 2024 Canadian Ophthalmological Society Annual Meeting and Exhibition. The discounted fares are available for booking from February 10, 2024 to June 2, 2024 and available for travel:

Applicable Rules

  • Departure from All Markets to Toronto (YTO): May 27, 2024 to May 31, 2024

  • Departure from Toronto (YTO) to All Markets: May 31, 2024 to June 3, 2024

  • Please book online or through your travel agent using the promo code COS24.

Porter offers complimentary in-flight snacks and beverages (including beer and wine), GatePorter service for carry-on and access to the Porter Lounge in Toronto where free Wi-Fi and comfortable, leather seating is available.

The promo code is intended for use by conference attendees and organizers and is not intended for distribution outside of authorized channels. Porter’s fare rules and conditions apply. For any questions regarding Porter’s services or any pre-travel concerns, please contact us at 1-888-619-8622.