Flight Reliability
F9 4609 · Frontier Airlines
Raleigh–Durham → Houston (RDU–IAH)
40
Bring Snacks
WanderNerd Reliability Score
- 63%
- Arrive within 15 minutes
- 34 min
- Average arrival delay
- 4.9%
- Cancelled
- 3 min
- Median arrival delay
Based on 102 historical flights. Data through May 2026.
What the data says
The late departure is the smart one here.
F9 4609 departing between 6–9 PM arrived on time 63% of the time, versus 50% between 3–6 PM.
Sunday scaries are real for this one.
F9 4609 arrived on time 77% of the time on Fridays and just 61% on Sundays. That gap is worth planning around.
Well behind the RDU–IAH route.
F9 4609 arrived on time 63% of the time, versus 84% across the RDU–IAH route.
Lagging the Frontier Airlines network.
F9 4609 arrived on time 63% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon63%(16 flights)
- Tue—(3 flights)
- Wed—(1 flights)
- Thu67%(27 flights)
- Fri77%(17 flights)
- Sat—(5 flights)
- Sun61%(28 flights)
- 9 AM–12 PM—(8 flights)
- 3–6 PM50%(10 flights)
- 6–9 PM63%(79 flights)
60%
Dec
Aug 83% → Dec 60% on time
| Month | On-time percentage | Flights |
|---|---|---|
| August 2025 | 83% | 12 |
| September 2025 | 88% | 17 |
| October 2025 | 65% | 17 |
| November 2025 | 59% | 17 |
| December 2025 | 60% | 15 |
- Departures on time
- 58%
- Diverted
- 0%
- Flights flown
- 97
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 102 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.