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Route Reliability

Philadelphia → Houston

PHL–IAH · 1,325 miles · Philadelphia International Airport to George Bush Intercontinental Airport

79
Usually Fine
WanderNerd Reliability Score
80%
Arrive within 15 minutes
5 min
Average arrival delay
1.9%
Cancelled
1,958
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.United Airlines86%1,036 flights
  2. 2.American Airlines74%799 flights

Not enough history to rank: Spirit Airlines (68 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.

PHL–IAH flights departing between 3–6 AM arrived on time 96% of the time, versus 63% between 9 PM–12 AM.

Skip Thursday if you can.

PHL–IAH flights arrived on time 87% of the time on Tuesdays. On Thursdays: 77%.

United Airlines runs this route best.

United Airlines arrived on time 86% of the time on this route; American Airlines managed 74%.

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

On-time by weekday
  • Mon79%(297 flights)
  • Tue87%(261 flights)
  • Wed82%(265 flights)
  • Thu77%(285 flights)
  • Fri78%(304 flights)
  • Sat80%(213 flights)
  • Sun77%(287 flights)
On-time by departure window
  • 3–6 AM96%(23 flights)
  • 6–9 AM86%(533 flights)
  • 9 AM–12 PM80%(220 flights)
  • 12–3 PM84%(389 flights)
  • 3–6 PM75%(219 flights)
  • 6–9 PM72%(485 flights)
  • 9 PM–12 AM63%(43 flights)
On-time trend by month
76%
May

Jun 64% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202564%178
July 202568%189
August 202570%175
September 202584%159
October 202586%167
November 202587%148
December 202579%154
January 202683%138
February 202693%125
March 202689%152
April 202686%158
May 202676%169

Keep nerding

Based on 1,958 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.