Best online slot sites 2024

Written by Ian Zerafa

Checked by Lorella F.Paul P. •

Last updated on September 27, 2024

Looking for the best online slot sites in the US? Whether you’re a newcomer on the hunt for a casino with a free spins bonus or a seasoned player looking for a site that offers fantastic jackpot slots, we’ve got you covered.

This page explores everything to do with slots and where to find the best slot machine games. Let’s kick things off with our list of the best online slot sites:

On This Page On This Page

• Expert picks
• Top 10 slots
• How to choose
• Slot types
• Slot features
• Payouts and volatility
• Slot bonuses
• Software
• Slots on mobile
• New slots and features
• Free vs real money
• Getting started
• FAQs

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Casino Logo	Odds rating	Bonus	Go to casino Button	Show more	T&C
1 Mohegan Sun review	92/100 Games rating by Lorella F. 85% Playscore based on 8 critics	100% up to $1,000	Play now	Show more Good to know Email, live chat, phone support iOS and Android apps Over 790 slot games 9 payment methods Show less
2 SugarHouse review	91/100 Games rating by Ian Z. 92% Playscore based on 8 critics	100% match bonus up to $250 PACASINO250	Play now	Show more Good to know 1x bonus wagering 28 software providers Exclusive software on offer 11 payment methods Show less
3 Harrahs review	90/100 Games rating by Sarah C. 80% Playscore based on 8 critics	100% up to $100 + 100 free spins	Play now	Show more Good to know 850+ slot games iOS and Android app Simple registration 9 payment methods Show less
4 Tropicana review	88/100 Games rating by Lorella F. 90% Playscore based on 8 critics	100% up to $200 TROPTEN	Play now	Show more Good to know 24/7 customer support Caesers Rewards member Community jackpots 11 payment methods Show less
5 Caesars review	88/100 Games rating by Ian Z. 86% Playscore based on 8 critics	100% up to $2,500 and 2,500 Reward Credits on a $25+ wager TIME2500	Play now	Show more Good to know Caesars Rewards loyalty program Quick registration Over 1,000 games 11 payment methods Show less
6 BetRivers casino review	88/100 Games rating by Claire S. 85% Playscore based on 8 critics	Bonus Money reload up to $500 CASINOBACK	Play now	Show more Good to know Community chat with rewards Native app for Android Low bonus wagering requirements 9 payment methods Show less
7 Borgata review	87/100 Games rating by Ian Z. 92% Playscore based on 8 critics	$20 Bonus Dollars + 100% up to $1,000 MCW1000	Play now	Show more Good to know 12 payment methods 24/7 support Quick sign-up process 13 payment methods Show less
8 Resorts review	87/100 Games rating by Lorella F. 84% Playscore based on 8 critics	100% up to $1,000 DEPOSIT1	Play now	Show more Good to know Easy, quick registration Email, live chat, phone support iOS and Android apps 9 payment methods Show less
9 BetMGM casino review	85/100 Games rating by Ian Z. 91% Playscore based on 8 critics	100% up to $1,000 + $25 Free Play MCW1000	Play now	Show more Good to know 20+ software providers 24/7 support Play over 700 games 14 payment methods Show less
10 Stardust review	85/100 Games rating by Paul P. 86% Playscore based on 8 critics	$25 free + up to $500 in deposit bonuses FTD250	Play now	Show more Good to know Quick withdrawals Huge game variety Plenty of promos 9 payment methods Show less
11 PartyCasino review	82/100 Games rating by Claire S. 86% Playscore based on 8 critics	200% up to $100 + 25 free spins WELCOMEBONUS	Play now	Show more Good to know Safe and secure payments 500+ slots Unique roulette variants 14 payment methods Show less
12 PlayStar review	81/100 Games rating by Charlie S. 82% Playscore based on 8 critics	100% Deposit Match up to $500 + 500 Free Spins	Play now	Show more Good to know Two-part welcome deal Five-tier Playstar Club Smooth mobile apps 7 payment methods Show less
13 Horseplay review	70/100 Games rating by Paul P. 88% Playscore based on 2 critics	200% match up to $500	Play now	Show more Good to know Unique betting experience Selection of bingo games Detailed FAQ and Help Center 5 payment methods Show less
14 bet365 casino review	63/100 Games rating by Ramona D. 85% Playscore based on 8 critics	100% deposit match up to $1,000	Play now	Show more Good to know Low bonus wagering requirements Exclusive games on offer 20 software providers 11 payment methods Show less	21+. Gambling problem? Call 1-800-Gambler (call or text in Colorado).

We’ve listed these casinos based on their slots offering, starting with the one we think is the best slots casino. Of course, when we’re rating casinos, we rate for a ton of different factors, not only slots and games — that’s why this doesn’t just look like a copy-paste of our online casinos list. 

Overall rating is still important; we’d never recommend a bad casino with some good slots, but diversity and quality of the slot library takes chief priority for this list.

The top three slots casinos — our expert picks

Look, we get it. Sifting through several thousand slots sounds fun on paper, but it gets tedious real quick. This is what our experts are here for, to get you straight to the good stuff.

Our experts have gone through the various casino slots, analyzing the slot offerings, quality, software available, and of course quantity of slots. They’ve picked the top three slot casinos, and presented them below for you to enjoy.

🥇#1 Best overall: Mohegan Sun

You’re always guaranteed quality from established brands, and Mohegan Sun is no different. With nearly 1,180 slots, all present on Mohegan Sun’s excellent native apps for Android and iOS, it’s no wonder this casino finds itself so high up our ranking list.

Mohegan Sun’s massive library doesn’t just include slots, but also an impressive amount of jackpots, table games, and live dealers as well. They also all come with demo versions, allowing you to try them out for free.

🥈#2 Best all-rounder: SugarHouse

Although SugarHouse lacks behind in quantity, offering only 890-something slot games, the operator makes up for it with quality and diversity of themes, bonus features, and game types.

Players will find a well rounded portfolio of games, backed by player-favorite software providers — and the BetRivers name — known for exceptional production standards.

🥉#3 Best quality slots: Harrahs

Harrahs is a well-established US casino brand that proudly presents an extensive catalog of 900+ games. With over 60 years of history and a total of 18 locations in the US, it’s no wonder their online platform is continuing their success.

From almost 1,000 games, over 890 of them are high-quality slots and jackpots from reputable providers. And you don’t have to wonder about which to choose — you can try them out for free with the demos that they provide.

The best 10 online slots

Da Vinci Diamonds (IGT)

The Da Vinci Diamonds slot is known for its tumbling reels, which can turn even small wins into victory chains, and its scatter bonus round, which can net up to 300 free spins.

Read more: Da Vinci Diamonds slot review

Cleopatra (IGT)

Based on the immensely popular casino-floor slot machine, the online version comes with 5 reels rather than 3, and 20 paylines.

Read more: Cleopatra slot review

Bonanza Megaways (Big Time Gaming)

This 6-reeler offers up to 117,649 ways to win, and floats a theoretical RTP of 96%. Has win-chaining bonus rounds with unlimited multipliers.

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Starburst (NetEnt)

A simple game that got thousands of players into slots. Up to 3 respins on wilds and payouts from both the left and the right are nice twists to this low-volatility, high-RTP slot.

Read more: Starburst slot review

88 Fortunes (Scientific Games)

Scatter symbols can score you free spins, and a bonus game is triggered whenever you land the Fu-Bat symbol, netting you 1 of 4 available jackpots!

Blood Suckers (NetEnt)

Famous for its incredible 98% RTP, the wins here come from the vampire-slaying bonus game which can net over 20,000x your bet, and the jackpot which can do you for 30,0000x.

Read more: Blood Suckers slot review

MegaJackpots Cleopatra (IGT)

Like Cleopatra, but MORE. This variant on IGT’s Cleopatra game features a progressive jackpot, leading to some truly massive potential wins.

Divine Fortune (NetEnt)

The progressive slot game. You can win up to 600x your bet in the base game. 2 different wilds, free spins and a jackpot game where you can win cash prizes, 2 fixed jackpots or 1 progressive jackpot add a whole lot to this Divine offering.

Read more: Divine Fortune slot review

Zeus (Scientific Games)

Another land-based favorite that’s made the jump to online, its scatter bonus feature can net you up to 100 free spins at once.

Golden Goddess (IGT)

A simple low-volatility slot focused on lots of small wins. Stacking symbols and free spins rounds on scatters sweeten the deal.

Read more: Golden Goddess slot review

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How to choose the best slots and their casinos

When you’re looking at a slot machine’s rating, it’s worth looking at a casino’s rating too. The most popular online slots will be on dozens of websites, so there’s more to picking than just finding one you like. Fortunately, we rate slots and casinos, and give you the rundown on how we do both.

Slots: 

First thing we look at is the type of slot, whether it’s a video slot, old-schooler, progressive jackpot etc. Then we consider what features it’s got available, and how many of them. The payouts come next; we look at the return-to-player stats, a slot’s volatility, and the min/max payouts. Freshness is another factor — we don’t give or take points based on whether a slot is new, but we have certain expectations of recently released slots.

Areas that can affect both slot and casinos:

• Bonuses: some operators give better bonuses than others, and some slots have better bonus compatibility. 
• Software: A slot built by a casino software provider will get a better showing. Casinos that host a boatload of top providers deserve a shout too. 
• Mobile access: Some slots don’t work well on mobile, or at all. And if you’ve downloaded a few casino apps in your time, you know there are leaps and bounds between the best and worst.

Casinos:

We’d consider things like what casino payment methods are available, the casino’s safety rating, if any slot tournaments are available to give gamblers more chances to win (especially if these are freeroll tournaments, where you can participate without having to buy a ticket), the quality of their actual website, and the strength of their customer support offering. Our online casino reviews will help you dive into the good stuff.

Types

Slots take in money, spin, and should spit some money back out. But that’s just about the only thing they’ve all got in common. Slots can be totally different from each other. The number of reels can change, the number of paylines can change, and tons of different features can be offered. These all have a say on what type of slot a given game is classified as. 

No one type is necessarily better than another, but they can be more suited to different kinds of players, so knowing your playstyle can help you decide what are the best online slots for you.

Live slots

They’re still pretty new to the scene, but they’re gaining popularity quickly. If you want to add a human touch to your slots gameplay, this option’s for you. Just like online slots, you select your wagering options and hit spin. But rather than instantly lighting up the reels, this info is passed to a dealer who will spin a physical machine for you live on camera.

Video slots

In terms of sheer volume, there’s no bigger category. Technically, you could call all online slots video slots, but the term is generally used to refer to any slot that doesn’t fall into a specific special category. There’s tons of variety here, in everything from RTP and volatility to the number and type of features available per game.

Classic slots

There is beauty in simplicity, and that’s where classic slots shine. They’re modelled off the old fruit machines, and their old-school 3 (sometimes 5) reels usually line up to create just a single payline across the center. That usually means winning less often, but that’s compensated for by higher payouts-per-win. Because of this, many are considered medium-high volatility slots.

Quick hit slots

This popular slots series from Bally can trace its roots back to classic slots, and you’ll see some visual reminders in there — they like to use classic slot symbols like fruit, bars and 7s. If you want classic flavor combined with modern bonus rounds and features, you’ve found your place.

Quick Hit slots series

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Progressive jackpot slots

These are the online slots that offer the biggest wins. Their theoretical RTP tends to be a little lower than regular slots’, but a portion of the wager made on each spin goes into a jackpot pool, and those can go into the millions. It’s a greater risk for the greatest rewards. NetEnt’s Divine Fortune is one of the most popular progressive games at US slot casinos.

Megaways and Ways to Win

Originally thought up by BTG and Microgaming, some of the oldest names in online gambling, these slots drive a stake through the heart of traditional paylines. Rather than have a set paytable, any three matching symbols that appear left to right on neighboring reels score a win.

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Features

When it comes to slots, features are little twists that’ll help you score wins. Each slot works differently of course, but in general, the more features you have, the better. Scatters and wild symbols are the most common things you’ll find, but here’s a quick look at some of the most popular options:

Scatters: In casino slots, the winning symbols have to line up in a payline pattern in order to pay out. Not so with scatters. No matter where they fall on the screen, scatters pay out, as long as the minimum required number appears (usually 2 or 3).

Wilds: Function like wilds or jokers in certain card games. They substitute for the symbol you need to score your payout. There are sub-species of wilds too, like stacked wilds, which can wild out most or all of a reel, or sticky wilds, which can remain on the reels for a while, increasing your chances of landing wilds wins. Wilds wins are especially good, because they tend to be the highest-value symbols on the reels.

Free spins: There are many ways to trigger free spins, but they mostly work the same way. A spin you can win money on, but that you don’t have to pay for. Some slots have free spins that can retrigger themselves, racking up higher-value wins on free respins rounds. Free spins in free spins. It’s….Spinception.

Bonus rounds: Online slots also have bonus rounds. There are many ways to trigger these, usually by landing bonus symbols. This type of online slots bonus can take many forms, including free spins, often themed, or picking mystery prizes to see what bonuses you’ve won.

Multipliers: If a x2 multiplier symbol forms part of your winning payline, your win is doubled. If it’s a x3, it’s tripled. So on and so forth. Online slots players love these, for obvious reasons.

Gamble: Usually manifests as a double-or-nothing, where you can take a wager to stake your bonus round winnings on a single bet.

Cascading reels: You can think of these like a ‘mini-respin’, the nice part being that they usually trigger every single time you land a winning combination. When you win, the winning symbols pop out of existence and are replaced by new ones, potentially landing further wins.

This isn’t an exhaustive list, and new ones are coming in all the time. Games from upcoming software providers, such as 4ThePlayer slots, often come up with their own unique features.

Some popular features:

• Cleopatra (IGT) — Floats an uncomplicated free spins round with 15 spins and a 3x multiplier.
• Guns n’ Roses (NetEnt) — Features a bonus game with coin wins, stacked wilds respins, and a 3-level pick-to-win game.
• Gonzo’s Quest (NetEnt) — Avalanche reels can chain wins together, and add a multiplier of up to 5x when they do.
• 88 Fortunes (Scientific Games / SHFL)  — Free spins on scatters and a bonus round with 4 different jackpots.

Payouts and volatility

Sure, the point of playing is to have fun, but winning is always the best part of the game when playing at the best payout casinos. The likelihood of winning is an important thing to consider when choosing the best online slots. We usually look at RTP% and slot volatility when evaluating real-money slots.

RTP (return-to-player) is a descriptor for the percentage of wagered money that a player can theoretically expect to get back when wagering over a very long time. For example, if a slot has an RTP score of 95%, then a player making 100 bets of $1 on it could hypothetically expect to have $95 remaining at the end of their run. 

Of course, theoretical RTP is only an estimate calculated across a massive sample size, but you’d be hard-pressed to find a player who deliberately looks to play low-RTP games, such as China Shores slot. 

Volatility refers to a slot’s risk level with its wins and win rates. Low volatility slots are preferred by players who want to win smaller amounts more frequently, while high volatility slots hold a higher risk of losing money, but with the potential for much bigger payouts. If you’re playing a slot machine online, one isn’t necessarily better than the other, but there’s definitely something more suited to your style of play. 

Bonuses: free spins and no deposit

Bonuses have a huge say on choosing the slot you play, as well as where you play it. Many casinos have special online casino bonuses on specific slots — the Starburst slot and Book of Dead both became household names because loads of casinos give free spins bonuses on them.

Whenever free spins are attached to a sign-up bonus, it means you can play on a slot for free but win real money in exchange. 

There are two different ways slot sign up bonuses can work:

• The bonus offer states that the free spins can only be played on a specific slot
• If not specified in the bonus offer, you can use the free spins on any slot listed in the casino’s T&Cs 

Some operators will even offer an online slots no deposit bonus, which gives you the chance to win real money without risking your own cash. While ‘no deposit free spins’ are a thing, this is usually a small amount of bonus cash you can use as slot credit.

In general, though, most casino welcome bonuses can be used on slots. This goes for all casinos in legalized states, like NJ, PA, MI or WV online casinos.

When it comes to cash-type no deposits bonuses, slots usually contribute 100% towards the wagering requirements. These requirements are as low as 1x at the best online slots sites.

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Casino Logo	Odds rating	Bonus	Go to casino Button	Show more	T&C
1 BetMGM casino review	93/100 Bonus rating by Ian Z. 91% Playscore based on 8 critics	100% up to $1,000 + $25 Free Play MCW1000	Play now	Show more Good to know 20+ software providers 24/7 support Play over 700 games 14 payment methods Show less
2 Borgata review	91/100 Bonus rating by Ian Z. 92% Playscore based on 8 critics	$20 Bonus Dollars + 100% up to $1,000 MCW1000	Play now	Show more Good to know 12 payment methods 24/7 support Quick sign-up process 13 payment methods Show less
3 Harrahs review	74/100 Bonus rating by Sarah C. 80% Playscore based on 8 critics	100% up to $100 + 100 free spins	Play now	Show more Good to know 850+ slot games iOS and Android app Simple registration 9 payment methods Show less