Several pictures that he posted showed the plane ascending from San Juan's Luis Muñoz Marín International Airport - flying between the "outer band" of Irma and the "core" of the storm.
A Delta spokeswoman told The Huffington Post that the flight traveled from NY to Puerto Rico "on a safe route, touched down, picked up the people that needed to be picked up and made it back to John F. Kennedy".
A Delta Airlines flight - with 173 passengers on board each time - took off from New York's John F. Kennedy airport Wednesday and safely traveled to and from San Juan, Puerto Rico - all while Hurricane Irma bore down on the island. Many people were stranded on the island as airline companies chose to cancel their flights after warnings were issued.
Including taxiing in and out, the plane was on the ground for only 52 minutes, according to data tweeted out by Jason Rabinowitz. The hurricane is a category 5 storm and is the worst to hit the shores since 1928. "Everyone else has turned around", Rabinowitz said on Twitter.
Rabinowitz watched in awe at the pilot's skill and tweeted: "Amazing stuff".
Scenes of damage in San Juan, Puerto Rico hit hard for some Western New Yorkers who have ties to the island.
The plane took off less than an hour later with a new group of passengers for the return trip to NY.
The paper reported that when the 737-900ER plane reached San Juan at 12:01 p.m., winds registered at 28 miles per hour to 36 miles per hour - well within the safety limits for that type of aircraft.
Fifty-two minutes after landing, the time had come.
No other flights departed from San Juan after Delta left. "The air traffic control tower has now been evacuated".
"Our meteorology team is the best in the business", explained Erik Snell, vice president for Delta operations and customer centre. Delta has to get the passengers off, ready the aircraft for departure, and board the next wave of passengers, all before the impending hurricane makes a safe takeoff impossible.