The Bet365 withdrawal time can range from instant (Bet365 MasterCard) to within 24 hours (PayPal, Paysafecard) or 1-3 banking days (Debit, Visa, MasterCard).
Your account behavior and actions are also taken into consideration, and once your checks are valid and everything is legal and clear, your bet is settled. All this checking may take a long time, like an hour or longer, and as soon as everything is clear, Bet365 will consider your bet settled and pay you.