The Galaxy S26 Ultra is $420 off at Amazon US — and it’s now or never. The discount is live in the final 24 hours of Amazon’s fall Prime Day 2026 sale, according to 9to5Toys’ real-time deal roundup published at 13:11 UTC on 7 October. That timing means the offer expires before Thursday morning in New York, and likely earlier in India, where Prime Day runs on local time but no regional pricing or availability is reported for the S26 Ultra. This is not a new launch, nor a firmware update or carrier-exclusive variant. It’s a straight retail markdown on the flagship Android phone Samsung released earlier this year. One that competes directly with the Pixel 11 (also discounted up to $300) and iPhone 18 Pro (whose cases and 25W chargers are on sale separately). The $420 cut appears alongside other Samsung deals: the Galaxy Z Fold 8 drops $350, the Ultra version $400, and the Galaxy Tab S11 falls $355, all listed as ‘best prices in months’ or ‘all-time lows’. No storage tier, color, or carrier lock status is specified in the source. Also on sale: Samsung’s ViewFinity workstation monitors, down nearly 40%. Confirming Samsung’s broad participation across categories, not just handsets. The deal sits in Amazon’s ‘Today’s Big Deals’ Doorbusters section, meaning stock is finite and price changes are possible without notice. 9to5Toys adds a blunt caveat: ‘All prices subject to change at any time…cash in while you can!’ That warning applies especially here, since no other outlet has confirmed the S26 Ultra discount, and no post-sale restock or extended window is mentioned. Buyers should check seller ratings, warranty terms, and whether the listing shows ‘Ships from and sold by Amazon.com’. Critical for avoiding third-party fulfillment delays or grey-market units. This is a flash deal, not a permanent price drop. And it ends in hours.