Booking a multi-city flight with Air Canada is relatively straightforward using their online booking system. Here's a step-by-step guide:

  1. Visit the Air Canada website: Go to www.aircanada.com.

  2. Select "Multi-city": On the homepage, you'll typically find a search form where you can input your travel details. Look for the option to select "Multi-city" or "Multiple destinations." Click on that option.

  3. Enter your trip details: Enter the cities you'll be flying from and to, along with your travel dates for each leg of the journey. Make sure to input the correct dates and destinations for each segment of your trip.

  4. Select your flights: After entering your travel details, you'll see a list of available flights for each leg of your journey. Choose the flights that best fit your schedule and preferences.

  5. Review your itinerary: Once you've selected all of your flights, review your itinerary to make sure everything looks correct. Pay attention to the dates, times, and layovers.

  6. Add extras (if needed): You may have the option to add extras such as seat selection, additional baggage, or travel insurance. If you need any of these extras, you can add them to your booking at this stage.

  7. Enter passenger information: Enter the required passenger information for each traveler, including names, contact details, and any frequent flyer numbers if applicable.

  8. Payment: Proceed to the payment page to complete your booking. Enter your payment details and billing information to finalize your reservation.

  9. Confirmation: Once your booking is complete, you'll receive a confirmation email with all of the details of your itinerary. Make sure to save this email for reference.

  10. Manage your booking: You can manage your booking, make changes, or add additional services by logging into your Air Canada account or using the "Manage Booking" feature on their website.

If you encounter any issues or need assistance during the booking process, you can also contact Air Canada's customer service for support.