$125 Cheap Spirit Airlines flights Houston (IAH) to St. Thomas (STT)

Use the "Price (lowest to highest)" filter on Expedia to find cheap Spirit Airlines return flights from $251 from IAH to STT. Affordable one-way tickets from $125 are available as well.**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 get cheap flights from IAH to STT with Spirit Airlines, begin searching about one month before your intended departure. You can save 17% when you book your international tickets 18 to 29 days ahead instead of booking four to five months in advance. Another good tip? Booking on Sunday can lead to average savings of 17% compared to Friday (the most expensive day).**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 departures from IAH to STT with Spirit Airlines, filter 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.

A rewarding loyalty program and the ability to rack up points through Free Spirit are the start of the reasons to depart from IAH to STT with Spirit Airlines. Plus, when you join our One Key™ program, you can receive OneKeyCash™* in addition to Spirit Airlines's loyalty program earnings. It's yours to spend on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.