Is it okay to ask to spend New Years Eve with significant other?

Asked by Forever_Free (8570) December 4th, 2019 from iPhone

My girlfriend of over a year will be away starting on day after Christmas thru Jan 3rd visiting & skiing with her adult children. We have been in this committed relationship, spend weekly time together & have met each other’s kids & families.
Backstory is that her son (27) and daughter (24) live in Colorado and herself in New York. She is driving her daughter back to Colorado to spend time visiting and skiing and will fly home on Jan3rd.
I am happy she will have the time to spend with them over the holiday.
In light of her plans I decided to spend holiday time with my family that is in the Midwest.
I would like to spend New Years Eve and possibly New Years Day with her by getting a cheap flight ($70) to Denver.

I know I can ask for what I want, but is this intrusive to ask for?

Thanks in advance!