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Flight Reliability

F9 3136 · Frontier Airlines

Houston → Chicago (IAH–ORD)

43
Bring Snacks
WanderNerd Reliability Score
59%
Arrive within 15 minutes
36 min
Average arrival delay
2.7%
Cancelled
5 min
Median arrival delay

Based on 112 historical flights. Data through May 2026.

What the data says

6–9 PM has a slight edge.

Departures between 6–9 PM arrived on time 60% of the time, against 54% between 9 AM–12 PM.

Sunday scaries are real for this one.

F9 3136 arrived on time 65% of the time on Thursdays and just 48% on Sundays. That gap is worth planning around.

Well behind the IAH–ORD route.

F9 3136 arrived on time 59% of the time, versus 75% across the IAH–ORD route.

Lagging the Frontier Airlines network.

F9 3136 arrived on time 59% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon58%(12 flights)
  • Tue—(9 flights)
  • Wed—(6 flights)
  • Thu65%(23 flights)
  • Fri53%(19 flights)
  • Sat62%(13 flights)
  • Sun48%(27 flights)
On-time by departure window
  • 6–9 AM—(1 flights)
  • 9 AM–12 PM54%(52 flights)
  • 12–3 PM—(8 flights)
  • 3–6 PM—(7 flights)
  • 6–9 PM60%(40 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
78%
May

Jun 54% → May 78% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202554%13
July 202535%17
August 202542%12
February 202681%16
May 202678%23
Departures on time
62%
Diverted
0%
Flights flown
109
Months covered
11

Same route, other flights

Keep nerding

Based on 112 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.