$71 Cheap Spirit Airlines flights Philadelphia (PHL) to Houston (IAH)

You’ll find budget-friendly return Spirit Airlines flights from $151 from PHL to IAH by sorting your results from “Price (lowest to highest)” on Expedia. Or look for bargains from $71 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.

Spirit Airlines flights to Houston are usually more affordable in the quieter months of November and February. Whether you’re in search of a round-trip or one-way ticket, you could score a better deal then.

Look for affordable Spirit Airlines flights from Philadelphia Intl. Airport (PHL) to George Bush Intercontinental Airport (IAH) one to three months ahead of your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and itinerary, the best day to book a domestic flight is usually Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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 figure out if there’s a direct route from PHL to IAH with Spirit Airlines or other carriers, check the “Nonstop” box when browsing for flights.

To find the earliest departures from PHL to IAH with Spirit Airlines, sort your results by “Morning” and “Early Morning.” Choosing 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.

Spirit Airlines flights from Philadelphia Intl. Airport (PHL) to Houston land at George Bush Intercontinental Airport (IAH). This is the main entry point to this city.

With a rewarding loyalty program, Spirit Airlines is a top pick for many passengers journeying from PHL to IAH. Plus, as a Free Spirit and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your ticket type, a fee is typically charged if you cancel or reschedule your flight more than 24 hours after it’s been confirmed. To secure flexible fares, select our “Changes included” or “No cancel fee” filter when you search for flights. For more details on modifying or canceling your reservation, go to “Trips,” select your flight and tick “Manage Booking.”