Ninja DT251 vs Ninja DT551: 65 Highlights & 16 Differences — So, Which Air Fryer Actually Works Better
Do you need finesse or brute strength in your oven? DT251 keeps it precise, DT551 ups the muscle. Let’s break down the real winner. What sets Ninja DT251 and Ninja DT551 apart? We looked at their etl listed, door material, basket capacity & min temperature and key differences in this complete air fryers face-off.
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Moderator
Highlights 111
No extras. Just what matters.
Recaptor
Ninja DT251 vs Ninja DT551: Which Smart XL Air Fryer Oven Is Worth Your Kitchen Space?
When it comes to oven-style air fryers, Ninja’s countertop units have earned a loyal following for their ability to replace multiple appliances in one sleek design. The Ninja DT251 and Ninja DT551 are both part of this family, sharing many of the same hallmarks that make them appealing: 1800 watts of cooking power, 10 preset cooking functions, dishwasher-safe accessories, and a footprint that allows them to roast, bake, air fry, and dehydrate in a single unit. At first glance, they look almost identical in size, shape, and style, but digging deeper reveals differences that may sway your decision. While both can handle family-sized meals with ease, the details in cooking capacity, control flexibility, and design choices set them apart in meaningful ways.
The DT251: Compact Versatility With a Gentle Touch
Think of the Ninja DT251 as the model built for cooks who love precision at the lower end of the temperature spectrum. Its minimum temperature setting starts at just 85°F, which is ideal for tasks like proofing dough, dehydrating fruit, or gently warming leftovers without drying them out. That’s a rare capability for a countertop air fryer oven, and it makes the DT251 stand out if you’re the type who experiments beyond the usual air frying or roasting.
The DT251 also features a dedicated “Reduce Fat” setting, something Ninja emphasizes as part of its healthier cooking promise. While both models share the ability to cook with less oil, this programmed function makes it more straightforward for those who want one-touch convenience for lighter meals.
Capacity-wise, the DT251 offers about 22 quarts of usable cooking space, enough to fit a full chicken or two racks of cookies, but it does sit a notch below the DT551. For some households, that smaller footprint may actually be an advantage—especially if counter space is at a premium or you prefer not to power up a larger oven for everyday meals.
It also maintains solid consistency in cooking, with preheat times averaging around two minutes and a maximum run time of 60 minutes. While shorter than its sibling, this will be more than adequate for the vast majority of recipes. Add in its non-stick coated trays, and you get easier cleanup, something busy cooks will appreciate.
The DT551: Bigger Chamber, More Muscle
If capacity and control flexibility are high on your list, the Ninja DT551 edges ahead. With a 29-quart interior, it’s one of the largest countertop ovens in its class, and that extra room matters if you’re often cooking for a family or hosting friends. Fitting two 12-inch pizzas side by side is no problem here.
The DT551 also broadens its feature set with a grill function, something absent from the DT251. This gives you one more way to finish proteins with a nice sear or crisp vegetables without firing up a separate pan. Another standout is its custom program memory, letting you save cooking routines for dishes you make often—a thoughtful touch for repeat meals.
Speed is another advantage. The DT551’s preheat time is listed at just one minute, which may not sound dramatically faster than the DT251’s two minutes, but in a busy kitchen, it feels more immediate. Its 120-minute max run time also makes it better suited for recipes that need longer, steadier heat, such as slow roasts or baked casseroles.
Design details also tip slightly in its favor. The DT551 uses stainless steel trays instead of non-stick, which are more durable and resistant to scratches. Its tempered glass door not only looks sleeker but gives better visibility while cooking. For households that cook heavily and value sturdier construction, these small refinements add up.
Bottom Line
Choosing between the Ninja DT251 and Ninja DT551 comes down to how you cook most often. If you want a versatile oven that doesn’t take up as much usable space and can handle lower-temperature tasks with finesse, the DT251 is a smart, efficient pick. But if your focus is on bigger family meals, faster preheating, grilling, and durability, the DT551’s larger chamber and extra features give it the edge. Both are excellent countertop ovens that easily replace multiple appliances, but one may better fit your household rhythm than the other.
Verdict
- Winner: Ninja DT551 — Larger 29-quart capacity, extra grill function, faster preheating, and stainless steel trays make it the stronger all-rounder.
- Runner-up: Ninja DT251 — Still a fantastic choice, with a lower 85°F minimum temp and smaller footprint that suits precision cooking and limited counter space.
Comparisons
Two enter. One leaves your cart.Price comparisons
Ninja DT251
Ninja DT551
Comparisons & Facts 111
Side by side. The numbers. The features. No drama.Not just a spec list — this is a side-by-side air fryers comparison between Ninja DT251 and Ninja DT551, packed with useful details, standout features, and what users actually say. See which air fryer wins your vote.
General Specification 13
Basket Capacity
What is the capacity of the air fryer?
The cooking capacity is the amount of food the air fryer can cook at one time, varying from 2 to 10 quarts.
I think I’d go with the DT251. It's a bit smaller, but it should use less power too.
Manufacture Year
When was this air fryer made?
85 Ninja DT251 0 Votes 2020
93 Ninja DT551 0 Votes 2024
Indicates when the air fryer was produced to help you understand its design, features, and technology.
Type of Air Fryer
What is the type of this air fryer?
97 Ninja DT251 0 Votes Oven-Style
99 Ninja DT551 0 Votes Oven-Style
Air fryer comes in several types with their own unique features and designs to meet your different cooking needs.
Primary Material
What is the primary material of the air fryer?
92 Ninja DT251 0 Votes Stainless Steel
94 Ninja DT551 0 Votes Stainless Steel
The primary material of the air fryer ensures its durability and excellent performance.
Secondary Material
What is the second type of material?
90 Ninja DT251 0 Votes Aluminum
Who knows? 0 Votes Ninja DT551
The second material used in air fryers.
Available Colors
What are the color options of the air fryer?
85 Ninja DT251 0 Votes Brushed Stainless Steel
88 Ninja DT551 0 Votes Brushed Stainless Steel
It's important to choose the color of an air fryer that matches your kitchen decor and also reflects your personal style and preference.
Number of Basket
What is the total number of baskets?
Who knows? 0 Votes Ninja DT251
Who knows? 0 Votes Ninja DT551
It shows how many baskets the air fryer has.
Removable Basket
Does the air fryer have a removable basket?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
The removable basket inside the air fryer helps with easier cleaning and convenient food handling.
Stacked Frying Basket
Does the air fryer have a stacked frying basket?
No
0
Votes
Ninja DT251
No
0
Votes
Ninja DT551
Not all air fryers have a stacked frying basket. Most have a single basket, two, or more.
Sound Level
How much sound does the air fryer produce while cooking?
Who knows? 0 Votes Ninja DT251
Who knows? 0 Votes Ninja DT551
Quieter air fryers are better for a more peaceful cooking experience than louder ones. The sound level typically ranges from 50 to 60 dB.
Country of Manufacture
Where is the air fryer manufactured?
83 Ninja DT251 0 Votes China
88 Ninja DT551 0 Votes China
The information about where the air fryer is produced.
Limited Warranty
How long is the warranty for the air fryer?
The warranty period that can be claimed.
Dimensions & Weight 12
Height
How tall is the air fryer?
The height of the product represents its vertical dimension.
Width
What is the width of the air fryer?
The width of the product represents its horizontal dimension.
Depth
What is the depth of this air fryer?
The depth of the air fryer ensures it fits well on most countertops while still offering enough space for cooking.
Frying Basket Height
What is the height of the frying basket?
Who knows? 0 Votes Ninja DT251
Who knows? 0 Votes Ninja DT551
A taller basket can hold more food for cooking, while a shorter one may be better for smaller portions.
Frying Basket Width
What is the width of the frying basket?
Who knows? 0 Votes Ninja DT251
Who knows? 0 Votes Ninja DT551
A wider basket provides more space for food to be cooked at once.
Frying Basket Depth
What is the depth of the frying basket?
Who knows? 0 Votes Ninja DT251
Who knows? 0 Votes Ninja DT551
A deeper basket allows more food to be placed in the air fryer. It is ideal for larger batches or thicker foods that require extra space
Package Depth
What is the depth of the package?
Who knows? 0 Votes Ninja DT251
Who knows? 0 Votes Ninja DT551
Refers to the front-to-back dimension of the package.
Package Height
What is the height of the package?
Who knows? 0 Votes Ninja DT251
Who knows? 0 Votes Ninja DT551
Refers to the vertical dimension of the package.
Package Width
How wide is the package?
Who knows? 0 Votes Ninja DT251
Who knows? 0 Votes Ninja DT551
Refers to the horizontal side-to-side dimension of the package.
Oven Volume
What is the oven volume of the air fryer?
Who knows? 0 Votes Ninja DT551
It shows the total space inside the air fryer.
Net Weight
How much does the product weigh?
It refers to the weight of the product only, excluding any packaging or additional materials.
Gross Weight
How much does the entire package weigh?
Who knows? 0 Votes Ninja DT251
Who knows? 0 Votes Ninja DT551
Gross weight is the total weight of a package, including the product and all the materials used for packaging.
Power and Performance 10
Min Temperature
What is the lowest temperature?
The lowest temperature settings are available on the air fryer.
Wattage
How many watts does the air fryer use?
The higher wattage leads to faster cooking, but also higher energy consumption.
Voltage
How much voltage does this air fryer use?
The power needed for an air fryer to ensure safe and efficient operation.
Frequency
What is the power frequency of the product?
Power frequency is measured in Hertz, where 1 Hz means one cycle per second.
Amperage
How many amps does the air fryer use?
Typically, an air fryer may use between 6.67 and 15 amps.
Adjustable Temperature
Is there a temperature control function?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
Adjustable temperature in an air fryer is a feature that can control cooking temperature.
Max Temperature
What is the highest temperature?
The highest temperature setting available on the air fryer.
Cord Length
What is the total length of the power cable?
It shows how long the air fryer's power cord is to determine if it reaches outlets without using extensions.
Overheat Protection
Does the air fryer have overheat protection?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
It's important to know whether the air fryer has an overheating protection feature to prevent the device from overheating.
Noise Level
What is the noise level during operation?
Who knows? 0 Votes Ninja DT251
Who knows? 0 Votes Ninja DT551
Indicates how loud the air fryer operates; quieter models are better for home use.
Cooking Controls 24
Grill
Does the air fryer have a grill setting?
No
0
Votes
Ninja DT251
Yes 0 Votes Ninja DT551
Perfect to cook food like steaks, burgers, kebabs, and more.
Preheat Time
How long does it take to preheat?
Time required to reach cooking temperature.
Max Run Time
What is the maximum run time on the air fryer?
The longest time the air fryer can cook in a single cycle.
Custom Program Memory
Does the air fryer have custom program memory?
No
0
Votes
Ninja DT251
Yes 0 Votes Ninja DT551
A helpful feature that allows you to save your favorite cooking settings, so you don't have to set the temperature and time every time you cook the same food.
Number Of Cooking Function
How many cooking functions does an air fryer have?
95 Ninja DT251 0 Votes 10
95 Ninja DT551 1 Votes 10
A multitude of cooking functions to offer versatility when preparing a wide variety of dishes.
So, both Ninja DT251 and DT551 have 10 cooking presets, which are good to know. But I prefer to choose DT551.
Reduce Fat
How much fat reduction does this appliance offer? (in percentage)
Who knows? 0 Votes Ninja DT551
It shows whether the appliance is designed to cook with less oil or drain excess fat.
Faster Cooking
What is the percentage of cooking speed in this air fryer?
Percentage of air fryer cooking speed when compared to a traditional oven/air fryer
Air Fry
Does the air fryer have an air fry function?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
An air fry function works by circulating hot air to crisp food with little to no oil for healthier results.
Roast
Does the air fryer have a roast setting?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
Roast mode mimics a traditional oven's roasting process to cook large cuts of meat or vegetables.
Bake
Is a bake setting included in the cooking options?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
Some models of air fryers offer a bake setting, similar to conventional baking.
Broil
Does this air fryer include a broil setting?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
The broil setting is perfect for browning, melting, and crisping the top side of food.
Dehydrate
Does the air fryer have a dehydrate setting?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
Most air fryers come with a dehydrate setting to dehydrate your favorite foods.
Cooking Presets 8
Cake
Can this air fryer be used to bake a cake?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
Allows you to bake cakes such as sponge or pound cake.
Steak
Does this air fryer have a cooking preset for steak?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
Designed to cook steak at high temperatures, usually between 8–15 minutes.
Vegetables
Does this air fryer have a cooking preset for vegetables?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
A setting that optimizes the cooking temperature for various veggies like broccoli, carrots, Brussels sprouts, and mixed veggie blends.
Dinner Rolls
Does this air fryer have a cooking preset for dinner rolls?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
A pre-saved setting to warm, bake, or reheat dinner rolls in an air fryer. Not all air fryers have this cooking preset.
Frozen Snacks
Can this air fryer automatically cook frozen snacks?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
Able to fully cook frozen foods like French fries, frozen potato wedges, mozzarella sticks, and more.
Fish
Does this air fryer have a cooking preset for fish?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
The preset on the air fryer that can cook fish, fillets, salmon, or other seafood at the perfect temperature.
Chicken
Can this air fryer be used to cook a chicken?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
Designed to cook various types of chicken, like breast, wings, drumsticks, or whole chicken.
Pizza
Does this air fryer have a cooking preset for pizza?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
The preset to cook pizza both homemade and frozen in the air fryer.
Features 19
Temperature Indicator
Is there a temperature control function?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
Features that can control cooking temperature.
Time Control
Does the air fryer have time control?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
Features that can control cooking time.
Automatic Shut-off
Is there an automatic shutoff feature on this air fryer?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
A feature that can automatically shut off the fryer if it gets too hot.
Set Timer
Is there a timer function?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
A timer feature that can turn off the power at the end of the cooking time.
Toss Reminder to Flip Food
Does this air fryer have a toss reminder?
No
0
Votes
Ninja DT251
No
0
Votes
Ninja DT551
A reminder to flip the food to ensure each piece is crispy and perfectly browned.
Cool-touch Exterior
Does this air fryer feature a cool-touch body for safety?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
Features on the fryer exterior to keep the outside cool.
Controller Type
What type of controller does an air fryer have?
88 Ninja DT251 0 Votes Push Button
90 Ninja DT551 0 Votes Push Button
There are several types of controllers found in air fryers, from manual to smart controllers.
Temperature Light
Does the air fryer have a temperature light?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
The light will usually blink or turn on when the air fryer reaches the set cooking temperature.
Power Button
Does the air fryer have a power button?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
The button to turn the air fryer on and off.
See-Through Window
Does this air fryer come with a see-through window?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
The transparent section that is usually located on the front of the air fryer. It allows the user to monitor the cooking process without opening the air fryer.
Display Messages
Is there a display message on this air fryer?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
Features that can display on-screen information, such as feedback and important instructions, to help you operate the air fryer.
Mute Air Fryer
Is it possible to mute the air fryer?
No
0
Votes
Ninja DT251
No
0
Votes
Ninja DT551
Allows users to disable sounds or beeps.
Smart Features 6
Wi-Fi Connectivity
Does this air fryer support Wi-Fi connection?
No
0
Votes
Ninja DT251
No
0
Votes
Ninja DT551
Some air fryers are integrated with a WiFi connection to control and monitor the appliance remotely from your phone.
App Control
What app is required to operate this air fryer through app control?
Who knows? 0 Votes Ninja DT251
Who knows? 0 Votes Ninja DT551
Allows the air fryer to connect with a smartphone via Wi-Fi or Bluetooth.
Works with Alexa
Is the air fryer compatible with Alexa?
No
0
Votes
Ninja DT251
No
0
Votes
Ninja DT551
Some air fryers can be controlled hands-free through Alexa voice commands.
Compatible with Google Assistant
Does the air fryer work with Google Assistant?
No
0
Votes
Ninja DT251
No
0
Votes
Ninja DT551
Google Assistant voice control allows users to control and operate the air fryer anywhere without hassle.
Compatible with Siri
Is the air fryer compatible with Siri?
No
0
Votes
Ninja DT251
No
0
Votes
Ninja DT551
Siri Voice Control helps to control the air fryer just by voice command, making it easier to start, stop, or adjust the setting without touching any buttons.
Firmware Updates
Does this air fryer support firmware updates?
No
0
Votes
Ninja DT251
No
0
Votes
Ninja DT551
Provides easy access to new features, improvements, and bug fixes.
Care & Cleaning 8
Basket Coating
What type of coating does the air fryer basket have?
88 Ninja DT251 0 Votes Non-stick
95 Ninja DT551 0 Votes Stainless Steel
The durable coating helps prevent food from sticking while making cleanup easier.
Dishwasher Safe
Is the air fryer dishwasher-safe?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
Not all air fryers have dishwasher-safe parts, which means those parts can be cleaned in a dishwasher without damage.
Dishwasher Safe Pieces
What are the air fryer parts that can be cleaned in a dishwasher?
88 Ninja DT251 0 Votes Drip Tray, Basket, Crisper Plates
90 Ninja DT551 0 Votes Drip Tray, Pan, Crisper Plates
It shows which air fryer parts can be cleaned in the dishwasher.
Hand Wash
Can the air fryer be hand-washed?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
The air fryer can be easily hand-washed in warm, soapy water.
Spot or Wipe Clean
Can the air fryer be cleaned by wiping only the dirty areas?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
The air fryer is easy to clean by simply wiping the parts with a damp cloth and letting them dry.
Air Dry
Is air drying safe for the material and finish?
No
0
Votes
Ninja DT251
No
0
Votes
Ninja DT551
The air fryer parts can be left to air dry after washing
Self-Cleaning Mode
Does the air fryer have a self-cleaning mode?
No
0
Votes
Ninja DT251
No
0
Votes
Ninja DT551
A self-cleaning mode helps loosen food residue, grease, and odors inside the air fryer.
Filter Type
What kind of filter does the air fryer use?
Who knows? 0 Votes Ninja DT251
Who knows? 0 Votes Ninja DT551
There are several types of filters used by air fryers, each of which comes with a specific purpose.
Environmental & Energy 5
Energy Star Certified
Is the air fryer Energy Star certified?
No
0
Votes
Ninja DT251
No
0
Votes
Ninja DT551
Indicates that the air fryer meets high energy efficiency standards.
Prop 65 Label
Does the air fryer have a Prop 65 Label?
Yes 0 Votes Ninja DT251
No
0
Votes
Ninja DT551
The warning label is part of California's Proposition 65 about significant exposures to chemicals that cause cancer.
Eco Mode
Does the air fryer have an Eco Mode?
No
0
Votes
Ninja DT251
No
0
Votes
Ninja DT551
Eco Mode in an air fryer is designed to save more energy.
BPA-Free
Are the materials Bisphenol A (BPA) free?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
The air fryer with BPA-free means it does not contain any traces of Bisphenol-A.
PFAS-Free
Is the air fryer PFAS-free?
No
0
Votes
Ninja DT251
No
0
Votes
Ninja DT551
The air fryers that are PFAS-Free mean the product does not contain harmful chemicals in its material, so it is safe to use.
Exterior Details 3
Door Material
What is the material of the air fryer door?
80 Ninja DT251 0 Votes Stainless Steel
92 Ninja DT551 0 Votes Tempered Glass
The type of door material in the air fryer ensures its durability and optimal performance.
Finish Type
What is the finish type of the air fryer?
90 Ninja DT251 0 Votes Brushed
97 Ninja DT551 0 Votes Stainless Steel
High-end finishes are known for their durability, which may last longer or resist damage better.
Door Style
What is the style of the air fryer door?
90 Ninja DT251 0 Votes Drop Down
92 Ninja DT551 0 Votes Drop Down
How the cooking compartment is accessed or opened.
Certifications 3
ETL Listed
Is this air fryer ETL-listed?
Yes 0 Votes Ninja DT251
No
0
Votes
Ninja DT551
ETL Listed in the air fryer means the product is safe for home use.
UL Listed
Is this air fryer UL-listed?
Yes 0 Votes Ninja DT251
Yes 0 Votes Ninja DT551
Underwriters Laboratories (UL) has tested and certified the air fryer to meet safety standards.
CSA Listed
Is this air fryer CSA-listed?
No
0
Votes
Ninja DT251
No
0
Votes
Ninja DT551
The product has been tested and certified by the Canadian Standards Association (CSA).
Guides 2
Files 1
Ninja DT251 Use Guide
Files 1
Ninja DT551 Owner's Manual
Reviews 0
The good, the bad, and the brutally honest.Average Rating
Features
Dimensions & Weight
Power and Performance
Cooking Controls
Features
Care & Cleaning
Discussions 1
Thoughts, takes, and hot debates.
0
Cartling
Awards 0
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