Arty

Former Lancastrian

Mmmm this is an interesting one. I am assuming you flew with a Charter company like Sunwing et al. I also assume you flew on a UK or other passport to get on the plane to Los Cabos.
So now its the return journey and you need to fly back.
I am betting that you don't currently have an eTA which is required.
If the airline follows the rules then you either need the valid eTA or a valid PR card. As a PR you don't need an eTA but you need proof of PR. If applying for an eTA you need to declare that you are not a PR so you would be lying on the application or if the eTA folk do their job they might put 2 & 2 together and refuse the eTA application. If it is issued then probably no harm no foul and although I could make a case for misrepresentation but that might be somewhat harsh given the circumstances and that you have a valid PR card at home.
I am surprised the airline didn't question you for the outbound flight but hey that ship has sailed.
Let us know how you get on.

Hurlabrick

Hard to say, it is entirely down to the airline. Have you tried calling them to ask? You clearly DO have a valid PR Card and have some type of proof (a copy), but not an original of course.

Arty

Arty

Hurlabrick

I just noticed an earlier post was by Former Lancastrian. I am pretty sure he is a serving CBSA officer. I suspect he is hinting that you might tell a white lie to get an ETA which would allow you to get on tge plane. You would have no trouble once you get to a CBSA agent at the border......

Arty

Former Lancastrian

If the OP wishes to use my reply as a hint though reading it carefully I could not be accused of telling him what to do

Hurlabrick

I figured!

danshaw91

I did the same thing earlier this year. I had to fly into the Buffalo and cross the border via land. That was the only way they I could do it. Not ideal but the drive from buffalo isn't too bad.

Arty