Originally Posted by
jsl42
So as not to spend a minimum of 6 hours of a one day trip sitting on a train. 💡
You'll be spending the same 6h flying back and forth. Assuming you will get to the airport an hour before the flight, that's 2h each way + 1h to get to/from Porto from the airport in Porto. The train station in Lisbon is in the city, like the airport.