Can I bring a bicycle helmet on board my Southwest Airlines flight?

Yes, you are allowed to bring a bicycle helmet on board a Southwest Airlines flight. According to Southwest Airlines' website, a bicycle helmet is considered a piece of sporting equipment and is allowed as a checked or carry-on item, subject to applicable fees and baggage allowances.

When bringing a bicycle helmet as a carry-on item, it must fit under the seat in front of you or in an overhead bin, and it must not exceed the carry-on baggage size requirements of 10 x 16 x 24 inches. Additionally, the helmet must be properly secured and not obstruct any aisle or other area on the aircraft.

If you are bringing a bicycle helmet as a checked item, it must be properly packaged in a hard-sided case specifically designed for bicycle helmets or in a soft-sided case that provides equal or greater protection to the helmet. It must also be within the size and weight limitations of Southwest's checked baggage policy.