SAN FRANCISCO INTERNATIONAL AIRPORT (CBS SF) — A United Airlines flight that left from San Francisco International Airport Tuesday morning headed for Hawaii had to turn back due to a “maintenance issue.”

United Airlines flight 1111 departed the airport at about 8:45 a.m. for Kahului Airport in Maui, according to airline spokeswoman Erin Benson.

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A maintenance issue forced the flight to return to SFO, however, Benson said.

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The plane landed safely and all passengers were let off before boarding another plane, which departed at 4:05 p.m., according to Benson.

United Airlines is looking into what caused the maintenance issue, Benson said.

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