"in few hours" is correct and usable in written English.
You can use it to indicate when an activity or event will be happening soon. For example, "I'll be heading to the office in few hours."
Basically; in few hours I have to get up to have another hard day of life?
Can I talk to you in few hours?" She got back to me at 1.30am.
these canisters fired in few hours this morning in 1 area only where Hussain Ali was killed http://t.co/wXDrzthJ @jihankazerooni #Bahrain — Where is @abdulemam?
And in few hours – between 5 and 7pm – we are going to go to another one because we can't afford food.
June 17, 2013 Douglas Herbert (@dougf24) #G8 : #Hollande meeting w #Putin in few hours, prelude to #Obama face-off with Russian leader later in day.
I want to live; I do not want to die … My house was hit by three mortars and all my hard work for more than 10 years after my graduation as a civil engineer was gone in few hours.
In Cologne, the headquarters of Ford's European operations, workers will be putting in fewer hours.
He talked about putting in fewer hours at the Carter Center so he could spend more time with his family.
Could you do your job in fewer hours?
The problem? Trying to do the same amount of work in fewer hours.
And there are faster-growing cities, and subway systems that carry more people in fewer hours.
