$90 Cheap Spirit Airlines flights Raleigh (RDU) to Houston (IAH)

Finding cheap one-way Spirit Airlines flights from RDU to IAH from $90 on Expedia is a cinch --- just filter by "Price (lowest to highest)." Alternatively, check out our affordable round-trip fares from $151 for your next exciting getaway.**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.

Start searching one to three months before your departure to score cheaper fares on Spirit Airlines flights from Raleigh - Durham Intl. Airport (RDU) to George Bush Intercontinental Airport (IAH). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing right, and you can enjoy significant savings on domestic flights.*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.

Search Spirit Airlines's earliest flights from RDU to IAH by using the "Morning" and "Early Morning" filters. Not only will you arrive sooner, early departures also have a 20% less chance of being 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 RDU to IAH with Spirit Airlines and you can look forward to a range of perks starting with a rewarding loyalty program. When you book through Expedia as a Free Spirit and One Key™ member, you can also earn OneKeyCash™* to spend on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.