“This one's quite a bit cheaper... but it has a six-hour layover in Atlanta.”
You're flying overseas for a family event. You're looking for cheap plane tickets now with your wife. You found a flight that costs less but takes a long time. You point it out to her.
This one's quite a bit cheaper... but it has a six-hour layover in Atlanta.
When you're comparing two things, you use a coparative adjective like this:
She's taller than he is.
I'm more scared now than I was the first time.
If you want to describe the amount of difference between two things, you can use the phrase "quite a bit":
She's quite a bit taller than he is.
I'm quite a bit more scared now than I was the first time.
"Quite a bit" is something in between "a little" and "a lot".
When you travel somewhere by airplane, sometimes you can't fly directly to your destination. You have to take a flight to one place, then take another flight to your destination. The time that you spend waiting at the connecting airport is called a "layover".
People describe the location and length of layovers like this:
We had a 4-hour layover in London.