The best Blackjack side bets to avoid are those with a high house edge, as they significantly reduce your chances of winning in the long run. Bets like Insurance, which is offered when they're dealer has an Ace showing, are particularly unfavorable because the house edge is around 7-8%. Other side bets such as Perfect Pairs, 21+3, Super Sevens, and Royal Match also carry high house edges—often between 3% and 10%. While these bets can offer big payouts, they don't provide good value for players and are best skipped ifgoing you're focused on minimizing the casino's advantage. In general, sticking to the main Blackjack game and following basic strategy will give you the best odds.