Absolutely not! Paper is a really bad medium to store flour as it cannot protect the contents from moisture and rough handling. Paper pouches maybe good if you're selling samples of let's say a handful of flour. Other than that, paper bags for flour are not a good idea. Instead, you can opt for standup pouches.

Flour needs to be kept in a waterproof container that provides adequate protection against moisture. Flour packaging has to provide easy access as well.

(a) Barrier
Flour may go stale when it is exposed to moisture. Any material used for packaging flour must provide effective protection against moisture, foul odor, and any other environmental factors that could seriously affect the quality of the product and reduce its shelf life. Since paper cannot provide protection against moisture, it is a very bad packaging option for flour.

(b) Functionality
There are no households that do not use flour. In fact, it is one of those items that we use every day.  This calls for user-friendly flour packaging solutions. Manufacturers can make flour packets more consumer-friendly by adding features such as zip locks, hang holes, and tear notches. Besides increasing the usability of the packet, such features attract customers. In fact, flour that comes packaged in easy-to-use bags is more likely to be picked up by consumers. In other words, good packaging has the potential to boost your sales.

(c) Branding
Innovative and user-friendly packaging increases sales. But the first thing you need to do is to attract customers. This can be accomplished through branding. Customers are more likely to select brands they are already familiar with. Stand up pouches have spacious front and back areas that provide enough room for branding. For example, you can print your company logos and product information on these bags.

Stand up pouches come with polymer, substrate, and oxide barriers. They act as a good barrier against environmental factors that could negatively affect the quality of flour. Stand up pouch packaging is consumer friendly, because the manufacturer can easily add features such zip locks, spouts, and tear notches to these bags. Better still, standup pouches are cheaper than other flour packaging solutions. While a custom printed standup pouch costs only around 20 cents, other packaging options may cost as much as 75 cents apiece.  

Stand up pouches also help manufacturers save money on inventory costs because they can be stored flat and occupy much less space than other packaging solutions like jars.
Finally, stand up bags can be recycled. This makes them eco-friendly. They are also landfill friendly because a landfill can easily hold a whole lot more stand up pouches than glass jars, huge plastic jars, and cartons.