Las Vegas police said Spirit Flight 245 returned to McCarran International Airport in Las Vegas Saturday evening and the passenger was taken into custody at the gate by police, Las Vegas' KTNV-TV reported.
A Transportation Security Administration representative told the TV station another passenger had told the flight crew the man in custody had behaved suspiciously.
The flight's passengers were evacuated and screened, and the plane was inspected. No bomb was found.
The remaining passengers were then put on another aircraft for their trip to Los Angeles.