Atlanta-based First Officer Cook and Detroit-based Capt. Johnson were the first two black women to fly a Delta mainline flight together in the cockpit on Sunday, Feb. 26.
They flew an Airbus A320 from Detroit to Las Vegas and after they arrived they posted a photo of the two on Facebook.
As for Johnson, she also is Delta's first African-American female captain.
According to Delta.com, "Throughout February, Delta is highlighting employees who have made their mark as African-American pioneers in a series called "Delta's Very Own Heroes."
Delta News Hub asked Johnson, "What was your inspiration to become a pilot?"
"There were no pilots in my life growing up, and I think I'm the first person in my family to graduate from college," Johnson on Delta's website. "But for as long as I can remember, I have been fascinated with airplanes and would think, 'What a great thing it would be to know how to fly.'"