Frontier has “Red-Eye” round-trip flights from Houston (IAH) to Philadelphia (PHL) for $77, NONSTOP. Flights August to September. Departures on Tuesday, Thursday, and Saturday. Extended Weekends available. Origin/Destination reversible.
Note: “Red-Eye” flights leave late at night. Make sure you pay attention to the day of your trip. People often get confused with flights departing after midnight, for example, a flight leaving at 12:05 AM on Saturday means you’ll need to be at the airport on Friday night.
Note: Frontier fares do not include a free carry-on bag. Only a small personal item, like a Jansport City Scout backpack is free. You can avoid paying for seat selection if you accept the randomly assigned seat prior to boarding.
Note: Frontier seats only have 28-inches of pitch; 2-to-3 inches less space than most other airlines.