Flight Reliability
F9 4742 · Frontier Airlines
Dallas–Fort Worth → St. Louis (DFW–STL)
96
Nerd Approved
WanderNerd Reliability Score
- 88%
- Arrive within 15 minutes
- 3 min early
- Average arrival delay
- 0%
- Cancelled
- 13 min early
- Median arrival delay
Based on 42 historical flights. Data through May 2026.
What the data says
Mornings have a slight edge.
Departures between 6–9 AM arrived on time 91% of the time, against 84% between 3–6 PM.
Sunday scaries are real for this one.
F9 4742 arrived on time 100% of the time on Thursdays and just 85% on Sundays. That gap is worth planning around.
Well ahead of the DFW–STL route.
F9 4742 arrived on time 88% of the time, versus 70% across the DFW–STL route.
Well ahead of the Frontier Airlines network.
F9 4742 arrived on time 88% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon—(3 flights)
- Tue—(0 flights)
- Wed—(1 flights)
- Thu100%(18 flights)
- Fri—(0 flights)
- Sat—(0 flights)
- Sun85%(20 flights)
- 6–9 AM91%(21 flights)
- 9 AM–12 PM—(2 flights)
- 3–6 PM84%(19 flights)
- Departures on time
- 88%
- Diverted
- 0%
- Flights flown
- 42
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 42 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.