It's hard to be certain, but it you follow the chronology of the movie, i.e., assuming that each day and night are consecutive to both the previous and the next ones, it took them six days. Following is a day by day account of their trip:



Day 1: Wyatt and Billy leave L.A. and cross over the Colorado River into Arizona. That night, they try to get a room at a roadside motel, but the owner flashes a "No Vacancy" sign, so they end up camping out.



Day 2: Wyatt wakes up Billy, and they're on their way. When Wyatt's tire goes flat, they stop at a ranch to fix it and end up staying for dinner. They set out again, and pick up a hitchhiker (Luke Askew) on his way back to his commune. The three of them camp for the night.



Day 3: The next day they arrive at a hippie commune, staying long enough to have a bite to eat of the commune's scarce food supply. After a little skinny dip, they move on. Driving through Las Vegas, New Mexico, they are arrested for "parading without a license." They spend the night in jail where they meet the drunken lawyer, George Hanson.



Day 4: George decides to ride along with them when they hit the road again. That night, the three of them set up a camp together, and Wyatt and Billy introduce George to the pleasures of smoking grass.



Day 5: They pass through Morganza, Louisiana and try to get a bite to eat at a cafe. Unfortunately, the rednecks are brutal to them, so they move on. That night, they set up camp again. During the night, they are attacked and George is murdered.



Day 6: They arrive in New Orleans where they have a nice dinner and pay a visit to Madame Tinkerbell's whorehouse where they are introduced to two hookers, Mary (Toni Basil) and Karen (Karen Black). Edit