Interesting domestic flights
I checked for a TLS/LIA, route I fly a lot.
On July 30th, the return ticket (early morning departure, coming back in the evening) is 919.70 € (829+84.1+6).
There is a lot of availability (strangely at 40000 miles return) and a 84.10 tax too.
Same day, an TLS/SXB return is 46.61 tax plus 20000 miles, and the same ticket is 821.61 € (769 + 46.61 +6). Lot of availability.