TAP Air Portugal are currently running a Black Friday promo where you can fly across Europe from only €49 roundtrip.
For example, fly from Lisbon, Portugal to Madrid, Spain for only €49 roundtrip (See image below).
DEPART:
Europe
ARRIVE:
Europe
RETURN:
Europe
DATES:
Availability from January to November 2023
STOPS:
Lisbon/Porto
TAP Air Portugal