No, roaming in Canada is generally not free with EU, UK, or US mobile plans, and can incur significant charges.
While "Roam Like At Home" applies within the EU/EEA, Canada is outside this zone, meaning most EU and UK plans will charge high rates for data, calls, and texts. Similarly, although some US plans offer North American roaming bundles, these are often paid add-ons or have specific limitations, and standard roaming without such a bundle is very expensive. Relying on your home plan for data in Canada without a specific add-on will likely lead to a surprisingly high bill.
To avoid these high costs, consider using an eSIM for your trip. An eSIM provides local data connectivity at much more affordable rates, automatically connecting you to the strongest available major network in Canada, such as Bell, Rogers, or Telus, ensuring reliable service throughout your stay.