The cantos do not have a regular duration, but some elements in the story allow us to create a chronology.
There are several sources in Italian, I tried to translate the one provided by the Dante Alighieri Society:
Dante's journey into the three otherworldly realms covers a span of seven days, with a clear reference to the biblical seven days of the world's creation. Dante gets lost in the "dark forest" at nightfall and manages to emerge from it at the first light of dawn.
"From the beginning of the morning" (Inf. I, 37), at about 6, Dante meets the loin, the first of the three fairs, and at the "fall of the night" (Inf. II, 1) the journey begins with Virgil, to arrive at midnight in circle IV (VII, 98).
At 7 am the poet talks to the devil Malacoda (circle VIII, bedlam 5).
He affirms that their conversation takes place "one thousand two hundred with sixty-six / years" and exactly five hours after Christ's death, which based on the Gospel of Luke, Dante knew had taken place at the sixth hour, that is at noon. At about one o'clock he finds himself in bedlam 9 and at sunset, he reaches the center of the earth.
In the very first hours of the third day, Dante and Virgil pass the center of the earth, and, having traveled the "passage", they find themselves on the beach of Purgatory to see the Angel who ferries appear against the suffused sky of dawn. The souls of purgatives.
At the end of the day Dante is in the Antipurgatory and for the whole night, he stops in the Valley of the Princes (Valletta Dei Principi).
At dawn on the fourth day, the ascent of Mount Purgatory begins, which stops with the fall of light before the ascent to the fourth frame.
From sunrise to sunset on the fifth day, the poet climbs from the fourth to the seventh frame of Purgatory and in the evening he stops with Virgil and Statius to rest before going up to the Earthly Paradise.
From dawn to midday Dante stops in the Earthly Paradise, where he performs the rites that make him "pure and willing to climb to the stars" (Pg. XXXIII, 145).
From noon of the sixth day to noon of the seventh Dante's ascent from the First Heaven to the vision of God with which the journey ends.