Airline companies have been one of the trades of recent months as vaccinations and the restart of the economic activity would trigger significant profits for a sector that had severe downfalls since the pandemic began. With the Delta mutation spreading at a rapid pace, there are now concerns about whether strict travel restrictions or even travel bans could return. The airlines index has moved under critical support levels, the long-term trend is under test and the losses from the highs are 17.87%, ie just before -20% which is characterized as a bear market.