No, I meant days of the week and times of those days. Not seasons of the year. For example, Friday vs Saturday, Saturday morning vs afternoon, etc..
Oh, sorry. But thank you for clarifying.
I was interested in this question myself, so I took a look at the popular sun-and-sand destinations here at YVR (Hawaii, Palm Springs, Cancun, Puerto Vallarta).
- Hawaii has two banks. One is dinnertime (5-6pm) departure, mid-late evening arrival in Hawaii. Return trips are turned around very quickly, and are timed for a 6-7am arrival at YVR.
- The second Hawaii bank is mid-morning departure, mid-afternoon arrival in Hawaii. Return trips are timed for a 10pm-midnight arrival at YVR, which is the last burst of activity for the night (excluding the middle of the night departures to TPE/MNL/HKG)
- To Palm Springs/PSP, there are two departures (one AC, one WS) between 9:00-9:30 am, arriving at PSP btwn 12:05-12:20 pm. Turnaround time is less than an hour and the return flights are timed for a 4:00 pm arrival at YVR. There is one later WS departure at 12:30 pm, for a 3:30 pm arrival, and the return flight gets into YVR at 7:00 pm.
- The vast majority of flights to Cancun leave YVR between 8:00-10:00 am, getting to CUN btwn 5:00-7:00 pm. Return trips leave in three departure banks: 4:40-5:00 pm (8:20-8:45 pm arrival), then six weekly WS/Air Transat departures at 6:45 pm (10:20-10:30 pm arrival), and a final bank btwn 7:30-8:30 pm (11:00 pm-midnight arrival)
- Puerto Vallarta is similar, except on the return trip, the banks are 4:25-4:30 pm (7:35-7:45 pm arrival), 5:50-7:00 pm (9:00-10:00 pm arrival). Sunwing has 1 rotation/week getting in at 5:00 pm, WestJet has 1/week getting in at midnight.
Days of departure are all over the place. In a congested airport like YVR, often you just have to accept whatever slots you get. However, for the 1-2x/week rotations, a Friday or Saturday departure is common, with a Saturday or Sunday arrival back at YVR. Due to flex time many workers in Canada (especially professional workers) can get a Friday or Monday off. This makes Fridays and Saturdays very popular for departures. As an aside, most people go to Mexico all-inclusives for 4 nights/3 days, 5 nights/4 days, or more rarely 8 nights/7 days.