$151 Cheap United flights Houston (IAH) to Knoxville (TYS)

You can find cheap return United Airlines flights from $209 from IAH to TYS by filtering your results from "Price (lowest to highest)" on Expedia. Or look for options from $151 for a one-way journey.**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.

Begin your search one to three months ahead of your departure date to find cheap fares on United Airlines flights from George Bush Intercontinental Airport (IAH) to McGhee Tyson Airport (TYS). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Time it well, and you can enjoy significant savings on domestic journeys.*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 earliest United Airlines flight from IAH to TYS takes off at 10:40AM UTC-6, landing at 1:58PM UTC-5. If you prefer to set off later in the day, the last United Airlines flight leaves IAH at 8:28PM UTC-6 and touches down at TYS at 11:46PM UTC-5. Flying early is generally a smart option as morning flights are less likely to be 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.

Journey from IAH to TYS with United Airlines and you'll enjoy a range of perks starting with a rewarding loyalty program. When you book through Expedia as a United Mileage Plus and One Key™ member, you can also earn OneKeyCash™* to redeem on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.