No. Fees are an estimate, not an exact prediction. "max 80 minutes" can't be guaranteed with any fee. I've seen longer periods without a new block being found.
If miners would find a few blocks close together, fees will drop enough for your transaction to be confirmed. If blocks are far apart (and the last few blocks took a long time), fees will rise further.
Thanks!
Another question - it says this transaction belongs to Block 504197 - where can you see the status when this Block is complete or how many % or estimate is left for it to be completed?