Is it reasonable to spend $400 on flights just for wedding dress shopping?

I live in texas and my family lives in IL. The wedding is in IL, and everyone in the weeding in in IL. I need to go wedding dress shopping. My mom said that I need to go shopping in IL if I want her and some other family members to go with. Flights are about $400 to fly in on a wednsday and leave early Saturday. TBH i dont want to spent about $400 just to go for that short of a trip, this wedding is already going to be expensive and I am trying to save for it. Is that price reasonable?

Is it reasonable to spend $400 on flights just for wedding dress shopping?
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