$109 Cheap American Airlines flights Greenville (GSP) to Houston (IAH)

Finding cheap one-way American Airlines flights from GSP to IAH from $109 on Expedia is a breeze --- just filter by "Price (lowest to highest)." Or check out our affordable round-trip fares from $217 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.

To find cheap American Airlines fares from Greenville-Spartanburg Intl. Airport (GSP) to George Bush Intercontinental Airport (IAH), start searching one to three months before your intended 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 affect what you pay. Sunday is generally the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your flight 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.

To find the earliest departure from GSP to IAH with American Airlines, sort your results by "Early Morning" and "Morning." Booking an early flight usually means cancellations are less likely.**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.