August is the cheapest month to fly this route, with average fares around $387 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $443 | $383 | Peak | |
| June 2026 | $421 | $387 | ||
| July 2026 | $403 | $373 | ||
| August 2026 | $387 | $373 | Best |
Departing on Wednesday offers the lowest average fares at $400. Friday departures are the most expensive at $429, a difference of $29.
The best time to fly is August. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from San Diego to Cancun is August, with average round-trip fares around $387. The lowest fare found in August is $373.
Wednesday departures are the cheapest, averaging $400 round trip. The most expensive day is Friday at $429.
Based on current pricing trends, booking for August travel offers the best value. Avoid May if possible, as fares average $443 compared to $387 in the cheapest month. June is a solid middle-ground option at $421.
Flying in August instead of May can save you approximately $56 per round trip. The cheapest month averages $387 while the most expensive averages $443.
Airlines, flight times, price calendar, and more for San Diego to Cancun
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