When French roulette is unavailable, you can go for European roulette, which has an RTP of 97.3% due to the single zero.
If possible, you should opt for French roulette, as it offers a 98.65%, because there is just a single zero on the wheel, and the en prison or la partage rule earns you a 50% refund if the ball lands on zero. There are three roulette variants: American roulette, European roulette and French roulette. It is also worth mentioning that some players are happy to eschew a high RTP in a bid to trigger the progressive jackpot on some high-paying slots. The average RTP of a slot is around 95% to 96%, so look for games with higher RTP rates, such as Blood Suckers (98%), Starmania (97.87%), White Rabbit (97.72%) and Guns N’ Roses (96.98%).
The RTP rates of online slots will vary considerably at the best online casinos that payout USA.