LATAM Brazil (formerly just known as TAM) operates a pretty cool fifth freedom flight between New York JFK and Toronto. The flight operates twice weekly (Wednesdays and Fridays) with the following schedule:
JJ8102 New York to Toronto departing 11:10AM arriving 12:55PM
JJ8103 Toronto to New York departing 3:50PM arriving 5:45PM
The plane originates in Sao Paulo, and as is the norm for most flights between Brazil and the US, it arrives in the US in the morning and returns back to Brazil at night. Given that the flight has 14+ hours of downtime, they operate a flight to Toronto during that time, allowing them to serve another destination and also get (slightly) better aircraft utilization.
Perhaps what I like most about this flight is what a great value it represents. Business class fares on this route are consistently -$90 one-way, which is pretty incredible. As a matter of fact, I can’t think of any market in North America with cheaper business class fares than that.