Down, Down, Down into sin. Sin is costly. Jonah paid the ticket. The voyage often took 6 months or even longer. It probably took all the money he had.
Sin is like that.
We pay our own way when we flee from God. We reap what we sow. And paying for that ticket was the cheapest part of Jonah's folly. The trip was far more expensive than he ever dreamed. It cost Jesus his blood.