On this page, we will discuss the best casinos for slot payouts, while also explaining the importance of RTP. We have scoured the web for the top payout slots in the UK, as well as where they can be played. With our recommended sites, you can win large jackpots, while taking advantage of a variety of payment methods, bonuses, and additional features. IF you are looking for slots with the highest possible payouts, then there are some online casinos that stand out.