Testing Requirements for Travelling to the US
https://www.cdc.gov/coronavirus/2019-ncov/travelers/testing-international-air-travelers.html
You will need to get a COVID-19 viral test (regardless of vaccination status or citizenship) no more than 1 day before you travel by air into the United States. You must show your negative result to the airline before you board your flight. Age 2 and up.
If you recently recovered from COVID-19, you may instead travel with documentation of recovery from COVID-19 (i.e., your positive COVID-19 viral test result on a sample taken no more than 90 days before the flight’s departure from a foreign country and a letter from a licensed healthcare provider or a public health official stating that you were cleared to travel).
The U.S. will accept a Viral Antigen Test (aka Rapid Antigen Test), in addition to other options listed on the CDC website. The test just has to be 1 day prior (so if you fly on a Saturday, your test can be anytime on Friday or before your flight on Saturday)
If your province does not have easily accessible options for Rapid Antigen Testing, there is an option you can purchase ahead of time online and do at home from Switch Health.
https://switchhealth.ca/en/partners/aeroplan#collectionKitsSwitch Health Rapid Antigen Test Kit ($79 for 2 tests)
Can share test with 2 travelers by adding additional traveler as dependent in your account. This allows you to take the test at the same time. Very smooth process, allow 30 minutes from start to finish.