I've tracked Samsung deals for years and these are the only Galaxy S26 Ultra deals worth your time

Galaxy S26 Ultra: up to $720 off w/ trade-in @ Samsung
Samsung is knocking up to $720 off its Galaxy S26 Ultra when you trade-in an older phone. The phone features a 6.9-inch 3120 x 1440 AMOLED display w/ 120Hz refresh, Snapdragon 8 Elite Gen 5 CPU, 12GB of RAM, and 256GB of storage. You also get a 200MP main (f/1.4), 50MP ultra wide (f/1.9), 10MP (f/2.4) telephoto w/3x optical zoom, and a 50MP (f/2.9) telephoto w/5x optical zoom. There's also a 12MP (f/2.2) front lens and 5,000 mAh battery, which is the largest battery of all the S26 phones. In our Galaxy S26 Ultra review, we said the Editor's Choice phone is super smart, sleek, and fast.

Galaxy S26 Ultra: free w/ trade-in @ T-Mobile
T-Mobile is offering various Galaxy S26 Ultra deals. You can get the phone for free when with trade-in on T-Mobile's Experience Beyond plan. Or you'll get up to $600 off with trade-in on most unlimited data plans.

Galaxy S26 Ultra: free w/ trade-in + unlimited @ Verizon
Verizon is offering the premium Galaxy S26 Ultra for free when you trade-in an eligible smartphone and open a new Unlimited Ultimate plan.

Purchase your Galaxy S26 Ultra via Best Buy and you'll get a free $100 Best Buy gift card. Additionally, if you opt to connect your phone to a carrier (Verizon or AT&T) during checkout, you'll save an extra $100 for a final price of $1,199. Note: Under "pricing options" choose the option that says "we'll help you connect this phone to Verizon or AT&T" to get the discounted price.

Amazon is offering a free $200 Amazon gift card when you purchase a Galaxy S26 Ultra. The S25 Ultra is Samsung's top-of-the-line phone and although $1,299 is its list price, this unlocked deal nets you a free gift card.

Galaxy S26 Ultra: free w/ trade-in @ AT&T
New and existing customers can get a free Galaxy S26 Ultra when they trade-in an eligible phone. You'll also need to sign up to an eligible unlimited data plan.

Galaxy S26 Ultra: $1,100 off w/ trade-in + unlimited @ Xfinity Mobile
New and current Xfinity Mobile customers can get $1,00 off the Galaxy S26 Ultra with trade-in. If you don't have a phone to trade-in, you can still get up to $500 off Samsung's new phone.