I also found this page to be useful for anyone wondering what the requirements are to travel back to Canada after receiving the OWP: https://www.canada.ca/en/immigration-refugees-citizenship/services/work-canada/permit/temporary/extend.html#worker_travelFrom: http://www.cic.gc.ca/english/helpcentre/answer.asp?qnum=206&top=17
Should I apply for an eTA or a visa when I apply for a work permit?
No. Depending on your citizenship, you may need an Electronic Travel Authorization (eTA) or a visitor visa, as well as a work permit. Your eTA or visa will be issued to you at the same time as your work permit. You do not need to apply separately or to pay an additional fee.
You may also need to give biometrics. Citizens from 29 countries and 1 territory need to give biometrics (fingerprints and photograph) when they apply for a visa.
From visa-exempt country:
- passport
- work permit
- eTA (if traveling by air)
From visa-required country:
- passport
- work permit
- valid visa ***You don’t need a valid visa if you return directly from a visit only to the United States or St. Pierre and Miquelon.
- eTA ***Only for specific countries: Brazil, Bulgaria and Romania