Verified answer

well it depends what long hours are you going

From WHERE in Illinois to WHERE in Arizona? There is more than one airport in those states.

Non-stop from Chicago to Phoenix is about 3 3/4 hours.

One stop flights range from 5 hours to more than 24 hours (crazy).

Travel from, say, Springfield to Tuscon can be as short as 5 3/4 hours up to almost 30 hours.

it is <<really>> easy to look up flights on a site like http://www.kayak.com/

Give it a try.

it depend on which city you are departing from in illinois

and which city in arizona you want

but if from chicago to phoenix is 3 hours 41 mintues

Depends on any stops or connections you might have to make. If it is a none stop flight about 3 hrs or under

3-3.5 hours

3 hours or so, I would guess.