I upgraded my Etihad flight from Abu Dhabi to London last year using miles, and it was surprisingly easy. I logged into my Etihad Guest account, saw the “Upgrade with Miles” option, and within minutes, I was confirmed for business class! The flatbed seat and gourmet meal made the overnight flight feel luxurious. A friend of mine used the bidding system once — he placed a modest offer, and it got accepted 24 hours before departure! If you’re short on miles, you can also pay the fare difference in cash or mix both. Honestly, calling 877-764-3622 is the easiest way to explore all upgrade options — the team helped me figure out which route gave me the best value. Totally worth it if you want a more comfortable experience without paying full business class prices.