$147 Cheap United flights Greenville (GSP) to Houston (IAH)

You'll find budget-friendly return United Airlines flights from $293 from GSP to IAH by sorting your results from "Price (lowest to highest)" on Expedia. Or search for deals from $147 for a one-way trip.**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.

For cheap United Airlines fares from Greenville-Spartanburg Intl. Airport (GSP) to George Bush Intercontinental Airport (IAH), start searching one to three months before your planned departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence the cost. Sunday is usually the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your journey on a Sunday.**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 GSP to IAH departs at 6:35AM UTC-5, landing at 8:23AM UTC-6. If you'd like to jet off later in the day, the last United Airlines flight leaves GSP at 6:35AM UTC-5 and touches down at IAH at 8:23AM UTC-6. Flying earlier is often a wise choice as 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.

Fly from GSP to IAH with United Airlines and you'll enjoy a range of benefits including a rewarding loyalty program. When booking through Expedia as a United Mileage Plus and One Key™ member, you may 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.