Book Fox put together a great list of top Flash Fiction websites organized by the amount of traffic each website receives a month.

These websites are open to receiving flash fiction, sudden fiction, micro fiction, short-short — i.e. stories under 1000 words. These are stories that can be read in 5 minutes or less.

Here are some of the top sites on the list by the numbers:

1. 3 AM Magazine – 85,000 VISITORS MONTHLY
2. Flash Fiction Online – 35,000 VISITORS MONTHLY
3. Word Riot – 25,000 VISITORS MONTHLY (No longer accepting submissions)
4. Every Day Fiction – 22,000 VISITORS MONTHLY

See the rest of the list here.