Route Reliability
Houston → Philadelphia
IAH–PHL · 1,325 miles · George Bush Intercontinental Airport to Philadelphia International Airport
- 81%
- Arrive within 15 minutes
- 15 min
- Average arrival delay
- 2.1%
- Cancelled
- 1,960
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines83%1,036 flights
- 2.American Airlines79%802 flights
Not enough history to rank: Spirit Airlines (67 flights), Frontier Airlines (55 flights). We rank airlines only after 100 flights on the route.
What the data says
Morning-you made the right choice.
IAH–PHL flights departing between 3–6 AM arrived on time 93% of the time, versus 65% between 3–6 PM.
Sunday scaries are real for this one.
IAH–PHL flights arrived on time 89% of the time on Tuesdays. On Sundays: 76%.
United Airlines has a slight edge here.
United Airlines arrived on time 83% of the time on this route; American Airlines managed 79%.
Slipping a little lately.
IAH–PHL flights arrived on time 82% of the time over the last three months in the data, compared with 89% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon76%(301 flights)
- Tue89%(261 flights)
- Wed82%(266 flights)
- Thu81%(287 flights)
- Fri79%(301 flights)
- Sat82%(214 flights)
- Sun76%(284 flights)
- 3–6 AM93%(29 flights)
- 6–9 AM88%(703 flights)
- 9 AM–12 PM69%(88 flights)
- 12–3 PM80%(615 flights)
- 3–6 PM65%(74 flights)
- 6–9 PM72%(405 flights)
Jun 66% → May 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 66% | 181 |
| July 2025 | 69% | 188 |
| August 2025 | 74% | 172 |
| September 2025 | 89% | 158 |
| October 2025 | 80% | 168 |
| November 2025 | 84% | 148 |
| December 2025 | 86% | 154 |
| January 2026 | 89% | 139 |
| February 2026 | 92% | 125 |
| March 2026 | 80% | 152 |
| April 2026 | 87% | 158 |
| May 2026 | 80% | 171 |
Keep nerding
Based on 1,960 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.