The distance between these two cities is 6,284 miles "as the crow flies." At 20 miles a day (a hopelessly optimistic number), the time required would be about 314 hours of walking. Assuming 8 hours of walking per day, this works out to about 39 days.
17DAYS
It is impossible to drive to Lisbon from New York.
6 and 1/2 to 7 hours
3 hours
21 hours
3 seconds
24 hours
4.6 minutes.
45 minutes
19 hours
It takes about 6 hours from Madrid to Lisbon and the distance is about 628 kms by car.
There is no high-speed train connecting Lisbon and Barcelona. The high-speed train from Barcelona to Madrid takes about 2hr and 40mins. The normal speed train from Madrid to Lisbon only leaves once a day and takes about 10hr to get from Madrid to Lisbon. It is a smarter idea to take the high-speed train to Madrid and transfer to a bus that will go to Lisbon.