Typical dictionaries provide you with audio snippets and usage examples like below:
Mr. Smith, alias Mr. Lafayette
Our service extends existing pronunciation dictionaries by adding visual and situational context.
Thoughts* on how to pronounce
It's easy to pronounce the word 'alias' if you are familiar with the pronunciation of alien. That is, simply take the 'n' off of alien and pronounce the letter 's' instead and you've pronounced alias.
*These are free thoughts on the pronunciation of alias, and they will likely
evolve overtime. They are typically informal and may use different a phonetic pronunciation
alphabet from time to time.