Flight Reliability
F9 4978 · Frontier Airlines
Houston → Orlando (IAH–MCO)
46
Bring Snacks
WanderNerd Reliability Score
- 61%
- Arrive within 15 minutes
- 35 min
- Average arrival delay
- 2.0%
- Cancelled
- 1 min
- Median arrival delay
Based on 249 historical flights. Data through May 2026.
What the data says
9 PM–12 AM has a slight edge.
Departures between 9 PM–12 AM arrived on time 64% of the time, against 60% between 6–9 PM.
Sunday scaries are real for this one.
F9 4978 arrived on time 79% of the time on Wednesdays and just 41% on Sundays. That gap is worth planning around.
Well behind the IAH–MCO route.
F9 4978 arrived on time 61% of the time, versus 81% across the IAH–MCO route.
Lagging the Frontier Airlines network.
F9 4978 arrived on time 61% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon51%(37 flights)
- Tue73%(30 flights)
- Wed79%(29 flights)
- Thu67%(39 flights)
- Fri58%(38 flights)
- Sat58%(38 flights)
- Sun41%(32 flights)
- 6–9 PM60%(201 flights)
- 9 PM–12 AM64%(42 flights)
79%
May
Jun 27% → May 79% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 27% | 30 |
| July 2025 | 53% | 30 |
| August 2025 | 60% | 20 |
| October 2025 | 68% | 22 |
| November 2025 | 60% | 15 |
| December 2025 | 60% | 30 |
| January 2026 | 68% | 25 |
| February 2026 | 72% | 25 |
| March 2026 | 72% | 25 |
| May 2026 | 79% | 14 |
- Departures on time
- 53%
- Diverted
- 0.4%
- Flights flown
- 243
- Months covered
- 11
Same route, other flights
Keep nerding
Based on 249 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.