Iāve seen some people suggesting it as an option in order to circumvent the negative test requirement. From my point of view there are two significant flaws with this option.
First, think of the added cost and time required. Unless they planned to transit through Canada both ways, a last minute ticket from Europe will set off flags and it wonāt be cheap. I did a quick check and a non-stop 1 way ticket on May 28th (weekend) from Barcelona to Toronto in economy is $1,400. In comparison, a last minute flight from Barcelona to JFK is only $601. An Uber ride will add at least another $150. Donāt forget the flight home and the cost of the unused flight which may be returned as a travel credit unless you paid extra for refundable tickets in the first place.
Second, CBSA will know you purchased your ticket last minute. The first question from the CBSA agent will probably be "So you live in the US and are coming to Toronto. How long are you planning on being here and where are you staying"? Somehow you know youāll be ārandomlyā selected for a Covid test and you will get the expedited service, so theoretically they could end up being stuck quarantine in Canada which defeats the whole purpose of flying to Canada.
Will some try to beat the system? Sure, there may be some that will try but I highly doubt there will be many.