Alaska Air Group (ALK) shares ended the last trading session 22.6% higher at $50.27. The jump came on an impressive volume with a higher-than-average number of shares changing hands in the session.

The midday flight to Chicago’s O’Hare International Airport started April 3. Daily departure of the newly added flight is 12:15 p.m. American continues to offer daily flights from AZO to Chicago, ...