This is hilarious, if true. I flew on a shitty subsonic flight from the midwest to Utah earlier this year and it was $450/ticket when I bought them 6 months out.
Still, you have to admit that 100 USD is in no touch with reality (if it was actually said).
We are talking about a plane that will burn much more fuel (which they claim will be carbon neutral) and fly a fraction of the passengers per trip, on routes that are already very competitive. 100 USD will only be a heavily subsidized fare at best. In reality the cost per route will much more likely be far higher.
I flew 2,000 miles between the Midwest and the west coast last week. $109 each way, with checked baggage, booked three weeks out.
I like Utah, but let's not pretend that your flight (or mine) is representative of anything.