In light of the festive season and National Ugly Sweater Day, Alaska Airlines and Horizon Air are letting passengers who don on any sort of holiday sweater enjoy priority boarding for their flights on December 20, 2019.

This one-day promotion is applicable to all Alaska Airlines and Horizon Air flights, available to all passengers regardless of their cabin class. For those who do not know, this is the third time that Alaska Airlines is spreading good ol' holiday cheer in this manner, alongside its employees and customers.

Travelers joining in the holiday sweater fun can share their photos and videos on social media platforms using these two specific hashtags: #iFlyAlaska and #UglySweaterDay.

Bringing extra holiday cheer to travelers on National Ugly Sweater Day is just one of the ways Alaska Airlines is celebrating the holidays throughout the month of December. Besides festive décor and boarding music, passengers can look forward to enjoying a host of holiday movies during flight. That's not all. Alaska Airlines is also flying a festive holiday-themed aircraft - affectionately known as Snowplane - across its network through the winter ski season.

Guests with access to Alaska Lounges can also enjoy special holiday-inspired drinks and cocktails, such as peppermint mochas and snowflake sprinkled lattes. Exclusively available on National Ugly Sweater Day at Alaska Lounges is the hot toddy cocktail that's bound to please.

Denise Bay is a staff writer at GET.com. Email: denise.bay@get.com.