Combine Line Charts Built off the Same Field

Ryan19 , create a datetime table or create a date and time table (separately) and join that with arrival and departure. One will active another will be inactive. Activate other using userelation.

Time table

https://kohera.be/blog/power-bi/how-to-create-a-time-table-in-power-bi-in-a-few-simple-steps/

userelation

https://radacad.com/userelationship-or-role-playing-dimension-dealing-with-inactive-relationships-in-power-bi

https://community.powerbi.com/t5/Community-Blog/HR-Analytics-Active-Employee-Hire-and-Termination-trend/ba-p/882970

To get the best of the time intelligence function. Make sure you have a date calendar and it has been marked as the date in model view. Also, join it with the date column of your fact/s. Refer :
https://radacad.com/creating-calendar-table-in-power-bi-using-dax-functions
https://www.archerpoint.com/blog/Posts/creating-date-table-power-bi
https://www.sqlbi.com/articles/creating-a-simple-date-table-in-dax/

See if my webinar on Time Intelligence can help: https://community.powerbi.com/t5/Webinars-and-Video-Gallery/PowerBI-Time-Intelligence-Calendar-WTD-YTD-LYTD-Week-Over-Week/m-p/1051626#M184


Appreciate your Kudos.