Edelweiss flights are not searchable through the route search feature at this time. The reason for this is the format Edelweiss is providing their schedule to our data provider, and this is not compatible at this time.
You can request Edelweiss flights by searching by flight number instead of the route. If you're unsure of the flight number, you can easily locate it using Google Flights. Please note that when searching, ensure to use the WK airline prefix, as the LX codeshare flights will not appear within the app.