Allegiant also has several fees that are similar to Ryanair.<p><a href="https:&#x2F;&#x2F;www.allegiantair.com&#x2F;popup&#x2F;optional-services-fees" rel="nofollow">https:&#x2F;&#x2F;www.allegiantair.com&#x2F;popup&#x2F;optional-services-fees</a><p>(I believe they charge for water onboard.)