To rectify their mistake, the pilot diverted the entire flight to OH to drop the animal off safely.
Before the diversion, the pilot announced the plane was landing in Akron because of "mis-boarded cargo", a passenger told WUSA9-TV in Washington, D.C.
Airline officials said it offered compensation to all passengers.
A third mishap involving a pet on a United Airlines flight has occurred in less than a week.
The 10-year-old German shepherd named Irgo arrived at a Wichita airport Thursday night after a flight on a private plane that United chartered from Japan.
Source Louis Nastro Reuters
United Airlines released a statement apologizing and taking full responsibility for the incident. No, not the one with the dog that died in the overhead bin. Catherine Cortez Masto, a Nevada Democrat, introduced the bill, known as the Welfare of Our Furry Friends (WOOFF) Act, on Thursday, which would prohibit putting animals in overhead compartments on aircraft on flights.
Maggie Schmerin, a United Airlines spokeswoman, told CNN the dog had been "loaded onto the flight in error" and was now "safely with its owner".
Cataline Robledo and her 11-year-old daughter and 2-month-old son brought their family dog onto a flight from Houston to NY in a pet carrier. Turns out United has a particularly frightful track record when it comes to safely transporting pets.
The dog was flown back to her on a plane after landing in Japan.
"Not exactly sure how, they aren't sure how either", Kara said.
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Then during a day of formal events, Mr Turnbull and Ms Suu Kyi had a detailed discussion about the ongoing humanitarian crisis. The 10-nation ASEAN prides itself on consensus diplomacy and non-interference in each other's affairs.
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Just having had the year that I've had, winning three Slams, that's what it took to get the ranking. This could also free me up, lay the pressure aside and start to play my best tennis", he said.
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Dubai ruler Sheikh Mohammed Rashid Al-Maktoum and British Prime Minister Theresa May were among the first to congratulate her. She said many students live in "challenging circumstances" and have "tough lives". "They're powerful subjects", she says.