I'm currently working in a contract position with no option to contribute to a 401k. For 2019, the contribution limit on a 401k is 19,000 vs 6000 on an IRA. Why is there such a big difference? I could understand if you were contributing to both. If you only can contribute to one or the other why can't the limits be more equal?
If you are a 1099 contract worker (self-employed), you should be eligible for a solo 401(k) which potentially has a much higher effective contribution limit because the participant is both the employer and the employee.
Edited to note: Since I posted this answer, you have clarified in the comments that you are a W-2 employee. It seems the best option is to seek a job that will allow for 401(k) contributions or allow you to work as a contractor.