I wrote a flight simulator in my own programming language
Proof-of-concept flight sim for the author's own Spectre language.

Natural language flight search promising—but Google Flights flex dates and Kayak already solve this.
Travelers planning flexible multi-city trips
Google Flights · Kayak Explore · Hopper
Proof-of-concept flight sim for the author's own Spectre language.
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.
Sira promises a tidy chat-first flow that shows published fares as the final price and even offers 24-hour holds — that no-upsell pitch is refreshing. If the backend truly normalizes GDS/ATPCO data into instant conversational responses, that’s a meaningful engineering feat. Still, the product faces brutal competition from incumbents and the landing page leaves open questions about baggage/seat handling, refunds, and real-time availability.
Natural language to trading logic beats manual indicator configuration.
AI travel briefings when Wanderlog and Google Flights already exist.
Interesting healthcare policy angle, but prototype lacks verifiable functionality and real data.