Examples:
- gfl1 txl, lpa, fr
- Search for one-way flights from Berlin Tegel to Las Palmas, departing next Friday
URL:
https://www.google.com/flights/#flt={%from IATA code|transform=uppercase}.{%to IATA code|transform=uppercase}.{%departure date|type=date};e:1;sd:1;t:f;tt:o