$137 Cheap United flights Denver (DEN) to San José (SJO)

Use the "Price (lowest to highest)" filter on Expedia to search for cheap United Airlines round-trip flights from $295 from DEN to SJO. Affordable one-way options from $137 are also available.**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.

Landing the best United Airlines deals from DEN to SJO often comes down to booking at the right time. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. To top it off, you can pocket 17% on average by buying your fare on a Sunday rather than a Friday, which is often the most expensive day to book.* It's a good idea to start searching for flights about one month before you plan to travel.*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.

Taking off from DEN at 3:48PM UTC-7, the first United Airlines flight to SJO arrives at 10:00PM UTC-6. Traveling early means you're less likely to encounter delays.* Don't like early starts? The last United Airlines flight from DEN to SJO departs at 3:48PM UTC-7 and touches down at 10:00PM UTC-6.*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.

With a rewarding loyalty program, United Airlines is a favorite of many passengers journeying from DEN to SJO. Plus, if you're a United Mileage Plus and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.