At the moment all travellers, regardless of vaccination status, will still require a pre-departure/pre-entry COVID-19 molecular negative test result. For entry to Canada the test must be performed within 72hrs of the scheduled departure time of their flight and for entry to the US the test must be performed no more than 3 calendar days before their flight departs. This applies for all travellers 5 years of age or older coming back into Canada and all travellers age 2yrs or older entering the US by air. Costs for testing in Canada before departure to US are approx $200 CAD at select pharmacies and select clinics in every city. Effective August 9, 2021, the Government of Canada is adjusting its post-arrival testing strategy for fully vaccinated travellers. Using a new border testing surveillance program at airports and land border crossings, fully vaccinated travellers will not need a post-arrival test unless they have been randomly selected to complete a Day 1 COVID-19 molecular test. There are no changes to the mandatory testing requirements for unvaccinated travellers. https://www.cdc.gov/coronavirus/2019-ncov/travelers/testing-international-air-travelers.html Costs for testing in the US before departure to Canada ranges from USD $65 to $125 for a COVID PCR test. The travel test for international travel is the most expensive at $125 per test. There are many locations for testing such as pharmacies and health care outlets. Important to ensure the testing service generates a test result with all the info required by Canada. i.e name, DOB, type of test, location of and provider of test etc. It is essential to ensure the test is for international travel and not the test that is performed for traveling to Hawaii which is different. Accepted types of tests for entry by air to US: Order: Requirement for Proof of Negative COVID-19 Test Result or Recovery from COVID-19 for All Airline Passengers Arriving into the United States | Quarantine | CDC Accepted types of tests for entry by air to Canada: https://travel.gc.ca/travel-covid/travel-restrictions/flying-canada-checklist/covid-19-testing-travellers-coming-into-canada#getting-tested Entering the US by land: Travel Restrictions Fact Sheet | U.S. Embassy & Consulates in Canada (usembassy.gov) Entering Canada by land: Entering Canada by land during COVID-19 - Canada.ca