Anticipatory anxiety for a flight on Monday has really set in, any words of encouragement?

I am flying PDX to LAS Monday morning for a mandatory work conference. It’s only about a 2 hour flight and I have been working on this in therapy after 3 years of not flying, but it is getting harder now that the flight is coming up. No matter what I tell myself logically, my brain still fears that I won’t “survive” the flight.

Any words of wisdom, success, or encouragement?