IAH to PHL flight delays
Houston, TX (IAH) Philadelphia, PA (PHL) · 1,325 miles
187 flights · March 2025 – August 2026 · US Bureau of Transportation Statistics
65.76%
Arrived on time
Within 15 minutes of schedule
1.6%
Cancelled
Share of scheduled flights
124 min
When late, late by
Average across delayed arrivals
43 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The two directions do not behave alike. PHL to IAH arrives on time 8.3 points more often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
This is a late route. Flights from Houston to Philadelphia miss their scheduled arrival often enough that a tight connection at the far end is a connection at risk.
Every airline on IAH to PHL
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| American Airlines | 83 | 67.5% | 3.61% | 116 min | — |
| United Airlines | 69 | 66.67% | 0% | 87 min | — |
| Frontier Airlines | 15 | 73.33% | 0% | 80 min | — |
| Republic Airways | 13 | 53.85% | 0% | 185 min | — |
| PSA Airlines | 7 | 42.86% | 0% | 350 min | — |
The return leg
PHL to IAH Philadelphia back to Houston 74.03% on time DOther routes from Houston
Common questions
Are flights from Houston to Philadelphia usually delayed?
65.76% of flights on the IAH to PHL route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is worse than the average route in this record.
How often are IAH to PHL flights cancelled?
1.6% of scheduled flights did not operate — about 16 in every thousand. That is in the normal range.
When IAH to PHL flights are late, how late are they?
About 124 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on IAH to PHL during March 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →