Mason Wells, a Mormon missionary from Utah, was standing in line at a Delta check-in counter when the first explosion went off just feet (meters) away, he told CNN on Friday.
"My body was actually picked up off the ground," he said. "My left shoe was blown off and a large part of the right side of my body got really hot and then really cold and I was covered in... A lot of blood that wasn't mine."
Three years ago, Wells walked away from the Boston Marathon attacks unscathed, even though he was standing at the finish line when two bombs detonated close by, killing three people and injuring more than 250.
In November, Wells was in France when members of the Islamic State group attacked a concert hall, a stadium and restaurants and bars, leaving 130 people dead and hundreds wounded.
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Wells says he was "lucky" to be alive despite suffering extensive injuries on Tuesday, including shrapnel wounds, a ruptured Achilles tendon and second- and third-degree burns on his hands and face.
"I actually felt the explosion on my right side, I could feel the blast," he said. After that, he added, he saw many injured and dead people.
The bombings at the airport and the Brussels metro killed 31 and wounded some 300.
At least two Americans died in the attacks and several others are reported missing, officials said. The missing include Justin and Stephanie Shults, who had accompanied her mother to the airport, according to American press reports.
"Our hearts break for the family and friends" of the two, New York Mayor Bill de Blasio said in a statement extending condolences on behalf of the city.
Governor Andrew Cuomo also said New Yorkers were saddened to learn of the deaths "in Tuesday's heartbreaking attacks."
The brother and sister were at the airport on their way back to the United States.
Alexander was talking to his mother when the call was suddenly cut short by an explosion, said James Cain, former US ambassador to Denmark and the father of Alexander's fiancee.