Just two years after hosting the first Flight conference, Twitter is skipping it in favor of "small, more intimate" events for developers. Twitter confirmed the decision to Recode and said the following in a statement:
We heard feedback after last year's Flight conference that small, more intimate events are where our developer community are seeing the most value. So instead of holding a single developer conference in San Francisco, we are hosting a series of regional developer events, continuing the momentum from our global #HelloWorld. Given the diversity of things developers are building with Twitter (from MoPub, to the Ads API, to Gnip, Fabric, and more) having more local events will enable us to engage with our community in a much more personal way.