Jonah 2

We can imagine Jonah inside whatever creature God prepared for this occasion, slipping in and out of consciousness for something like 72 hours. Even with all the miraculous provisions, this must have been incredibly unpleasant.
What we have here is a hymn of thanks marking this event, composed afterward. It follows typical Hebrew poetic expression, loaded with symbolism. In essence, Jonah was pretty sure he was going to die, and knew he deserved this most sorrowful end. There is nothing here of negotiating, but repentance and submission. Jonah promised, should the Lord relent, he would be faithful and obedient. Otherwise, this was surely his just end for defiance.
When Jonah was fully broken, the Lord directed the swimmer to discharge its passenger. Notice the Hebrew explicitly says Jonah did not have to swim ashore. He was vomited directly up onto dry ground. There is no reason to suppose this was anywhere far from Joppa, when Jonah sought to flee. The poetic justice of Hebrew thinking would predict Jonah found himself right where he left off. He still had a hard three days’ hike home, probably passing through Jerusalem and stopping at the Temple to fulfill his vows, on the way home.