Lya may refer to:
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LYA (airport), an airport serves Luoyang, China
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Lya (DC Comics), a fictional character
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Lya (given name), a feminine given name
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Lyman-alpha line
The Lyman-alpha line, typically denoted by Ly-α, is a spectral line of hydrogen (or, more generally, of any one-electron atom) in the Lyman series. It is emitted when the atomic electron transitions from an ''n'' = 2 orbital to the gro ...
(Lyα), a spectral line of hydrogen.
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