Companion Pass: Outgoing North America; Return from Europe
 

Looking at a Cruise from New York to London.

Can we use a Companion Pass: Canada (home City) to New York; London to Canada (home city)

No. You can use it to fly into London for example and return from Paris, you can fly into Miami and out of Fort Lauderdale, but you cannot fly into USA and out of Europe.

Any source, tariff rule or similar that says so? I am curious here, as I might have a similar scenario coming up next year.

https://www.westjet.com/en-ca/reward...panion-voucher

• Primary cardholder may use the companion voucher only once on their choice of either A) round-trip travel in Canada and the continental U.S. for a $99 CAD base fare B) round-trip travel to/from Mexico, Central America, the Caribbean and Hawaii for a $299 CAD base fare or C) round-trip travel to/from the rest of the WestJet network for a $399 CAD base fare. If one-way travel is booked, the full base fare will be charged, the voucher will be deemed fully used and the return portion of travel is forfeited.

This link is for the WestJet RBC Mastercard voucher T&C, but this outlines the different categories of Canda/Continental US or Sun destinations or Europe and also is the same guideline used when booking an Anywhere WestJet flies voucher.

Well, the Gold / Platinum companion vouchers do not state any of the rules above (and do not require paying a fare for the companion), except for the one-way restriction. Worth a try, then.