Like everything Depends where you work and what you're qualified to fly things are different . A small regional airline with 10 small planes will pay less than Delta.

Year one salaries major airlines can be low but they have significant jumps year 2 then annual raises after that. By year 6 making 140+ on low end for major airlines.

For a first officer:

Spirit you go from 33k to 61k after one year.

Southwest go from 55k to 90k after one year.

Fedex starts 84k and year 6 200k

If you become captain you can really make some money especially if you want overtime. It's not a bad life if you're single. Lot less stressful than being a truck driver.