Dana Finley Morrison, a Missouri-based fraternity and sorority worker, was flying from St Lucia to Miami on Saturday when she spotted the pilot's luggage, decorated with a "Let's Go Brandon" sticker.
The slogan began to circulate in September when a Nascar reporter misheard the chants of "F*** Joe Biden," and it has since become an anti-Biden rallying cry.
Morrison tweeted to American Airlines, writing: "Y'all cool with your pilots displaying this kind of cowardly rhetoric on their crew luggage when they're in uniform, about to board a plane?"
"We are not the only passengers who noticed and were disgusted."
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The airline soon responded to Morrison, writing in their own tweet: "Thank you for bringing this to our attention and we want to get this to the right team. Please DM any additional details."
Morrison later posted screenshots which she said was the conversation with American Airlines, with the airline promising to review the matter internally.
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"We hold our team members to the highest standards and expectations," the airline insisted.
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Yet many spoke out in defense of the pilot, insisting that he should be allowed to express his views.
The complaint was met with ridicule from other users on Twitter.
Mollie Hemingway, a Conservative commentator and an editor at The Federalist, deemed Morrison a "Karen" - a privileged and offensive White woman.
"Hope he and everyone else gets a raise for having to deal with Karen passengers such as this one," Hemingway spat.
Christina Pushaw, Ron DeSantis's press secretary, echoed the irritation, adding: "This pilot deserves a raise for dealing with entitled Karens while doing his job."
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"Don’t fire your pilots for being conservative or criticizing Biden," Pushaw further wrote. "We won’t have any pilots left. As if the thousands of flight cancellations aren’t enough already. @AmericanAir did the right thing."
One woman vowed: "Will never fly American again if you discipline an employee for having a political opinion."
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Another man remarked: "The World is watching, If crew can openly wear BLM merch, it's hard to justify censoring this."
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And another said that, provided he didn't press his views on anyone, there was no problem.
"If he's not pushing the agenda on the passengers and not spewing stuff over the intercom she can mind her own business!" she said.
"This young man has done nothing wrong."
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