May is the cheapest month to fly this route, with average fares around $412 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $412 | $361 | Best | |
| June 2026 | $426 | $388 | Peak | |
| July 2026 | $422 | $385 | ||
| August 2026 | $416 | $368 |
Departing on Wednesday offers the lowest average fares at $406. Sunday departures are the most expensive at $439, a difference of $33.
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 Cancun is May, with average round-trip fares around $412. The lowest fare found in May is $361.
Wednesday departures are the cheapest, averaging $406 round trip. The most expensive day is Sunday at $439.
Based on current pricing trends, booking for May travel offers the best value. Avoid June if possible, as fares average $426 compared to $412 in the cheapest month. July is a solid middle-ground option at $422.
Flying in May instead of June can save you approximately $14 per round trip. The cheapest month averages $412 while the most expensive averages $426.
Airlines, flight times, price calendar, and more for Portland to Cancun
View PDX → CUN Details