My very best friend is getting married. She got engaged over Valentine's Day and has the whole wedding planned already

. She mentioned initially they'd be married before the end of the year.
We haven't announced our pregnancy to people yet. I just received her Save the Date and the wedding is over Labor Day weekend. I'll be 37 weeks pregnant. I'd have to fly from Michigan to Oregon. It is a 4-5 hr flight...IF I can get it direct. If I have a stop it could be 6-7 hrs of travel. I checked Southwest Airlines website and they allow pregnant women to fly up to 7 days before their due date. My concern is I went into labor with DD at 38 weeks and delivered her within 8 hrs. There are the obvious health concerns with going into labor in air/delivering in a non medical environment. But my insurance doesn't fully cover out of network care either. If I had to be admitted to a hospital there I'd have to pay 20% of all the costs.
Ugh, I'm so torn b/c I'd move mountains for her. I want to go SO bad. And to throw another stick into the fire...DH may not be able to come with. If this is the case, I have another local girlfriend who is going without her DH as well and I could see if she'd fly with me. She's a nurse too.
What would you do?