$159 Cheap United flights Portland (PDX) to Cancun (CUN)

Finding cheap one-way United Airlines flights from PDX to CUN from $159 on Expedia is a breeze — just filter by “Price (lowest to highest).” Or check out our budget-friendly return fares from $325 for your next exciting vacation.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Browse for one-way or return flights to Cancun in October or September. You could find cheaper fares with United Airlines during these off-season months.

Check for United Airlines flights from PDX to CUN about one month before you want to go. The most affordable time to book an international flight is generally 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. Regardless of itinerary or ticket type, the best day of the week to book international airfare is usually Sunday. Friday is often the most expensive. Passengers booking on a Sunday can save 17% on average compared to those who book on a Friday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Simply enter your dates, press search and check the “Nonstop” filter on Expedia to browse any direct flights from PDX to CUN with United Airlines or another airline.

Find United Airlines’s earliest flights from PDX to CUN by using the “Morning” and “Early Morning” filters. Not only will you get to where you’re going sooner, early departures also have a 20% less chance of being canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Cancun Intl. Airport (CUN) is the primary Cancun gateway for United Airlines flights from Portland Intl. Airport (PDX).

Offering a rewarding loyalty program, United Airlines is a top choice for many travelers journeying from PDX to CUN. Plus, if you’re a United Mileage Plus and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

It’s generally possible to reschedule or cancel your flight, although there may be additional fees if your booking was made over 24 hours ago. Need flexible options? Make use of Expedia’s “No cancel fee” or “Changes included” filter to find flights that won’t penalize you if you need to revise your plans. To make changes, go to “Trips,” select your flight and click on “Manage Booking” for more information.