Indian travelers transiting through Canada en route to the USA or any other destination must obtain a transit visa beforehand. Boarding your flight from your departure country won't be possible without the necessary Canadian transit visa. Stay prepared and ensure a smooth journey.
If you are flying from Dubai to the USA and have a layover in Canada, you'll need to provide proof of your transit visa when boarding your flight in Dubai. Considering there are multiple direct flights daily from Dubai to the USA, it's advisable to book a direct flight to avoid the hassle and costs associated with obtaining a transit visa. While a layover flight might save you a few hundred dollars, the lengthy wait times and visa application process could outweigh the benefits.