Did Uber just scam me?

I left for airport around 2hrs back and booked an Uber the price it was showing during and after booking was around 500, after reaching terminal the price changed to around 850 for both me and the driver. Wtf was this, I know price of uber changes but how tf by this much? Is this common for airport cabs or should I ask refund from Uber? But I don't have any proof of original price during booking