May is the cheapest month to fly this route, with average fares around $402 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $402 | $341 | Best | |
| June 2026 | $425 | $341 | ||
| July 2026 | $406 | $350 | ||
| August 2026 | $487 | $456 | Peak |
Departing on Sunday offers the lowest average fares at $387. Saturday departures are the most expensive at $437, a difference of $50.
The best time to fly is May. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Portland to Mexico City is May, with average round-trip fares around $402. The lowest fare found in May is $341.
Sunday departures are the cheapest, averaging $387 round trip. The most expensive day is Saturday at $437.
Based on current pricing trends, booking for May travel offers the best value. Avoid August if possible, as fares average $487 compared to $402 in the cheapest month. June is a solid middle-ground option at $425.
Flying in May instead of August can save you approximately $85 per round trip. The cheapest month averages $402 while the most expensive averages $487.
Airlines, flight times, price calendar, and more for Portland to Mexico City
View PDX → MEX Details