Route · PHL → IAH · 2020–2025 BTS data
Philadelphia to Houston
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PHL to IAH (Philadelphia to Houston) ranks #1127 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 81.9%
- On-time
- +2.9 pts
- vs US avg
- 77 min
- Delay when late
- 10,258
- Flights
- #1127 of 4927
- Corpus placement
Cancelled
2.3%
Best Month
Oct 2024 91%
Worst Month
May 2024 66%
Distance
1,325 mi
Carriers
38
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 157 | 33 | 2 | 1 | OH,F9,AA,UA |
| Nov 2025 | 150 | 20 | 2 | 0 | UA,F9,OH,AA |
| Oct 2025 | 161 | 24 | 1 | 0 | AA,OH,UA |
| Sep 2025 | 137 | 26 | 0 | 0 | UA,OH,AA |
| Aug 2025 | 142 | 44 | 2 | 0 | AA,NK,UA |
| Jul 2025 | 151 | 48 | 6 | 0 | AA,NK,UA |
| Jun 2025 | 161 | 51 | 6 | 4 | AA,UA,NK |
| May 2025 | 148 | 42 | 3 | 0 | AA,OH,UA,NK |
| Apr 2025 | 131 | 23 | 0 | 1 | OH,UA,AA |
| Mar 2025 | 123 | 16 | 1 | 1 | AA,OH,UA |
| Feb 2025 | 104 | 16 | 3 | 3 | AA,OH,UA |
| Jan 2025 | 105 | 32 | 4 | 0 | AA,OH,UA,NK |
| Dec 2024 | 163 | 36 | 2 | 1 | AA,NK,OH,UA |
| Nov 2024 | 140 | 13 | 0 | 1 | UA,NK,OH,AA |
| Oct 2024 | 174 | 16 | 0 | 0 | UA,YX,NK,AA |
| Sep 2024 | 175 | 24 | 0 | 0 | YX,UA,AA,NK |
| Aug 2024 | 231 | 58 | 9 | 1 | AA,NK,UA |
| Jul 2024 | 227 | 76 | 30 | 0 | AA,NK,UA |
| Jun 2024 | 216 | 59 | 5 | 5 | AA,NK,UA |
| May 2024 | 206 | 70 | 6 | 6 | AA,NK,UA,YX |
| Apr 2024 | 190 | 32 | 0 | 0 | AA,NK,UA,YX |
| Mar 2024 | 167 | 29 | 0 | 1 | AA,UA,NK |
| Feb 2024 | 141 | 16 | 0 | 0 | AA,NK,UA |
| Jan 2024 | 133 | 28 | 7 | 0 | AA,NK,UA |
PHL–IAH seasonal on-time pattern
Best: October (88.9%) · weakest: July (72.9%)
Strongest calendar month
October
88.9% on-time · ~163 flights/mo
Busiest calendar month
June
~176 flights/mo avg
Weakest calendar month
July
72.9% on-time · ~166 flights/mo
Cancellation Rate
2.3%
89 of 3,833 flights
Diversion Rate
0.7%
25 of 3,833 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
PHL - Philadelphia
Full on-time, delay-cause, and seasonal performance for Philadelphia, PA.
PHL on-time profileIAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
IAH on-time profileCompare the two airports
See PHL and IAH side by side on delays, cancellations, and reliability.
Compare PHL vs IAHOrigin-hub reliability standing
Mid-pack among PHL departures
From PHL, this corridor sits with 60 other 75–85% on-time routes out of 65 tracked departures, not the hub's reliability leaders (4 at ≥85%) and not the softest ( 1 below 75%). Destination: Houston · fleet on-time rank #2412 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to PHL–IAH.
Routes with a similar on-time rate
What the Data Says About PHL to IAH
10,258 tracked flights put the PHL to IAH pairing (Philadelphia to Houston) at a 81.9% on-time rate, squarely in line with the wider network. Delays that do occur run 77.1 minutes on average. Across the 1,325-mile route and its 38 carriers, the trailing 24 months show 2.3% cancelled and 0.7% diverted (3,833 flights sampled).
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 91% on-time, while May 2024 came in at just 66% - a 25-point swing worth factoring into travel timing.
On the multi-year calendar, PHL–IAH peaks in October at 88.9% on-time while June carries the heaviest traffic (~176 flights per month) ; the softest month is July at 72.9%, a 16.0-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does PHL to IAH rank among US routes by traffic? ▼
How often are flights delayed from PHL to IAH? ▼
What is the cancellation rate for PHL to IAH? ▼
How far is the flight from PHL to IAH? ▼
When is the best time to fly from PHL to IAH? ▼
Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using PHL–IAH data
PHL–IAH is mid-pack at 81.9% on-time; month and carrier mix move more than the corridor headline.
- Compare PHL and IAH airport profiles: delay causes and top routes differ even on the same corridor. PHL airport
- If your dates flex, October (88.9% on-time) beats July (72.9%) on this corridor. Seasonal chart
- 4 other routes post a similar 81.9% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.