https://t.me/AviaTipsBot
(source: https://github.com/AviaTips/tg-alert/commit/e85d73a692ee780c8ec20e1aaa9dfdeac374d7a1)

AviaTips Alerts – a Mini App that helps you track flight ticket prices ✈️ Add an alert for your desired destination, and the bot will text you ticket prices. Be the first to know about cheap flight tickets and snag the lowest prices 🔥