SunnyFlight – Find cheap weekend flights to sunny destinations

The product nails a simple, useful promise: tell it your city, price cap and preferred warmth and it emails you only when a cheap sunny weekend appears. The UI shows thoughtful preference controls (flight-time, temperature, price sliders) and a clean onboarding flow, but the idea itself is derivative of existing flight-alert services and the site gives no immediate signal about data sources, coverage or how 'cheap' is calculated.