While I agree that a funeral that starts at Noon wouldn't still be going strong at 11PM that night, I do think that the intent was that Maddie took a bath, fell asleep and dreamed the dance sequence then immediately hopped a red eye for NYC. I lived in LA and now live in NYC. The last flight out of LA for NYC is generally around midnight. Pre 9-11, it is entirely plausible that she could have gone to bed at her usual 9:30, woken about 10PM and made that flight. Also, bars in NYC are open until 4:00AM (god bless NYC lol!), and David had not seen his best buds in years. We know that David keeps going strong until the wee hours (see The Next Murder You Hear et. al.), and I suspect that his friends would be no different especially under the circumstances. I don't think a funeral at Noon would stop David from tying one on all night. He called Maddie to tell her he had arrived OK, but she had already taken off for the airport. It's reasonably plausible that she arrived at the hotel in the very early AM and that he got back to the hotel then as well.