How Often Do They Roll The Drink Cart
 

on an 8 hour flight to Hawaii? In Economy. IAH-HNL.

More or less then three times?

How Often Do They Roll The Drink Cart
 

Does it matter? That's what the call button is for.

Intervals over 45 min are grounds for compensation! ;)

On long flights it's far better to stretch your legs and go to the back to collect a drink.

I would expect the cart twice around the time of the buy-on-board meal service. There should also be passes every ~90 minutes or so with water glasses on trays.

Pushing the call button for a drink is a very, very good way to piss off a flight attendant.

^^^
Also FAs often will do passings and you can flag one down and ask for whatever food or drink you're desiring. Personally I like to get up and stretch my legs on anything over 2 hours.

Also a good way to make idle chat with the FAs and whoever else might be back there getting a drink. Good way to stretch the legs and pass some time.

On a US carrier, yes it will, but we have to at least try and teach them that they are in a service job and are failing more often than not. Flagging them down as they go past is easier, but if they are MIA and you want a drink (or anything else) then that's what the button is for.

There are threads in the AA Forum where on some flights the fas (seem:)) to disappear for long periods of time.:td:
A long time ago I was on a charter flight on British Caledonian Airlines (London to NYC), the fas were continuously serving either drinks or food--are there still airlines with such good service?

only lazy FAs would get upset. After all, there is a pictogram of a person offering a beverage on the call button. Not a first aid symbol, not 911. Boeing and Airbus seem to understand the purpose of the call button. Shame that some FAs don't.

On transcon flights (similar for mainland-HNL) - I sometimes wondered how FA can "disappear" for 1 or 2 hours, even when it's a red-eye eastbound on a narrow-body like the 738's (i.e. on a recent DL LAX-JFK run) It's not like that they have their crew rest quarters above or below - walk to the back & the gallery is basically locked up, closed. Just plain self-service cups for water & juice. Another time, the curtains were drawn shut in front of the gallery - took a minute or two for 1 of the 2 FA to appear when someone a few rows in front of us rang the call button. Those on AA seemed to be better on this route, with 1 of them taking turns coming around with the tray, offering cups of water after they put away the cart.

Flying non-US carrier on TPAC runs, we have no problems whatsoever with services in Y.