$230 Cheap United flights Houston (IAH) to Philadelphia (PHL)

You'll find affordable return United Airlines flights from $173 from IAH to PHL by filtering your results from "Price (lowest to highest)" on Expedia. Or search for options from $230 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.

Start searching one to three months ahead of your departure date to find cheaper fares on United Airlines flights from George Bush Intercontinental Airport (IAH) to Philadelphia Intl. Airport (PHL). 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 the timing right, and you can enjoy significant savings on domestic journeys.*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.

Jetting off from IAH at 7:20AM UTC-6, the earliest United Airlines flight to PHL lands at 11:41AM UTC-5. Flying earlier in the day means you're less likely to experience delays.* Prefer a later start? The last United Airlines flight from IAH to PHL departs at 6:30PM UTC-6 and touches down at 10:45PM UTC-5.*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 opportunity to collect points through United Mileage Plus are the start of the reasons to jet off from IAH to PHL with United Airlines. Plus, when you join our One Key™ program, you can earn OneKeyCash™* in addition to United 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.