$59 Cheap United flights Oklahoma City (OKC) to Houston (IAH)

Finding cheap one-way United Airlines flights from OKC to IAH from $59 on Expedia is simple — just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly round-trip fares from $117 for your next adventure.**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.

Search for affordable United Airlines flights from Will Rogers World Airport (OKC) to George Bush Intercontinental Airport (IAH) one to three months ahead of your departure date. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and journey, the best day to book a domestic flight is generally Sunday and the most expensive day is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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.

The first United Airlines flight from OKC to IAH takes off at 5:00AM UTC-6, landing at 6:40AM UTC-6. If you want to head off later in the day, the last United Airlines flight leaves OKC at 5:22PM UTC-6 and touches down at IAH at 7:01PM UTC-6. Flying early is often a wise choice as morning and mid-morning flights are less likely to experience cancellations.**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.

A rewarding loyalty program and the opportunity to collect points through United Mileage Plus are the start of the reasons to fly from OKC to IAH with United Airlines. Plus, by joining Expedia's free One Key™ program, you can earn OneKeyCash™* in addition to any airline loyalty program earnings. You can put it toward your future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.