Originally Posted by
dbrossard
If I try to book on Google flights PTP to FDF on June 24th it finds the flights you talked about. Air Caraïbe. And then if I try on the same day from FDF to Yul it also finds the Air Canada flight but searching directly from PTP to Yul does not work. I don't recall that Google flights restricts itself to code share flights. So it is a little weird it doesn't find the connection on its own
If you look via multi city on Google flights, you will see options PTP to FDF on Air France of Air Caraibes, and then onward on Air Canada for the next leg - but you will have to book as separate tickets. I do not know the interline agreements between the airlines which would impact your ability to ticket as one. I do not believe Google flights will combine two separate fares on two separate airlines for you. I believe other sites, like Kiwi.com, will- though it doesn't appear that this particular combo shows.
(You also could take a flight to Port Au Prince on Monday, and then get to Fort Lauderdale on Spirit)