Google Flights, one-way

Primary tabs

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