Flight Reliability
WN 4938 · Southwest Airlines
Denver → Spokane (DEN–GEG)98% of its flights flew this route. The rest (SLC–BNA) are included in these numbers.
82
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 1 min early
- Average arrival delay
- 0%
- Cancelled
- 7 min early
- Median arrival delay
Based on 59 historical flights. Data through May 2026.
What the data says
Morning flights do better here.
WN 4938 departing between 6–9 AM arrived on time 96% of the time, versus 65% between 6–9 PM.
A bit ahead of the DEN–GEG route.
WN 4938 arrived on time 81% of the time, versus 76% across the DEN–GEG route.
A bit ahead of the Southwest Airlines network.
WN 4938 arrived on time 81% of the time, versus 78% across the Southwest Airlines network.
The breakdown
- Mon—(8 flights)
- Tue—(9 flights)
- Wed—(8 flights)
- Thu—(8 flights)
- Fri—(8 flights)
- Sat—(8 flights)
- Sun—(9 flights)
- 3–6 AM—(1 flights)
- 6–9 AM96%(27 flights)
- 9 AM–12 PM—(5 flights)
- 6–9 PM65%(17 flights)
- 9 PM–12 AM—(8 flights)
- Departures on time
- 73%
- Diverted
- 1.7%
- Flights flown
- 58
- Months covered
- 4
Same route, other flights
Keep nerding
Based on 59 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.