August is the cheapest month to fly this route, with average fares around $457 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $583 | $512 | Peak | |
| June 2026 | $564 | $366 | ||
| July 2026 | $516 | $366 | ||
| August 2026 | $457 | $366 | Best |
Departing on Wednesday offers the lowest average fares at $456. Friday departures are the most expensive at $605, a difference of $149.
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 Mexico City is August, with average round-trip fares around $457. The lowest fare found in August is $366.
Wednesday departures are the cheapest, averaging $456 round trip. The most expensive day is Friday at $605.
Based on current pricing trends, booking for August travel offers the best value. Avoid May if possible, as fares average $583 compared to $457 in the cheapest month. June is a solid middle-ground option at $564.
Flying in August instead of May can save you approximately $126 per round trip. The cheapest month averages $457 while the most expensive averages $583.
Airlines, flight times, price calendar, and more for San Diego to Mexico City
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