Should I pay extra for seat selection?

Yes. When flying with children, do not leave it to the airline's computer algorithm. Pay the seat selection fee to guarantee a row together.

What is the best day of the week to fly to Cancun?

Tuesday or Wednesday departures are consistently $50–$150 cheaper per ticket than Friday or Sunday flights.

Booking a Family-Friendly Flight to Cancun

Book direct flights arriving in the morning to minimize jet lag and avoid tight connections that increase the risk of lost luggage. Use Google Flights to track specific dates and set alerts at least 4 months in advance for the best price-to-convenience ratio.

Prioritize direct flights. Cancun International (CUN) is a major hub. Avoid layovers at all costs; if a toddler has a meltdown or a flight is delayed, a second leg becomes a logistical nightmare. Filter for 'Nonstop only' on search engines.
Select morning departures. Aim for a flight that lands in Cancun by 2:00 PM. This gives you enough buffer for customs, the drive to your resort, and getting the kids settled before their bedtime, preventing an 'overtired child' crisis on your first night.
Verify airline seat policies. Check the airline's website specifically for their 'Family Seating' policy. Choose airlines that guarantee parents can sit next to children under 13 for free, rather than paying extra for 'preferred' seating.
Pack the 'Emergency Gate Bag'. Keep a backpack separate from your checked luggage containing diapers, a change of clothes for everyone, snacks, and a tablet with downloaded shows. Do not check this bag.

Should I pay extra for seat selection?: Yes. When flying with children, do not leave it to the airline's computer algorithm. Pay the seat selection fee to guarantee a row together.
What is the best day of the week to fly to Cancun?: Tuesday or Wednesday departures are consistently $50–$150 cheaper per ticket than Friday or Sunday flights.