Heading to Oahu in September (can't wait!!!). I have booked the Pearl Harbour passport online over 48 hours ago, but so far I haven't received an email confirming the booking or an acknowledgement of the payment. The booking definitely went through, and I was able to download the tickets for the Aviation Museum straight away. Does anyone have any idea how long it takes for the information to arrive after booking? Thanks. So used to acknowledgements arriving straight away, wondered if anyone else has had the same experience? I booked via the official website. Many thanks everyone.