Flight Reliability
DL 351 · Delta Air Lines
Seattle → Honolulu (SEA–HNL)
86
Pretty Reliable
WanderNerd Reliability Score
- 86%
- Arrive within 15 minutes
- 2 min early
- Average arrival delay
- 0.8%
- Cancelled
- 6 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
DL 351 arrived on time 92% of the time on Wednesdays. On Fridays: 80%.
Well ahead of the SEA–HNL route.
DL 351 arrived on time 86% of the time, versus 66% across the SEA–HNL route.
A bit ahead of the Delta Air Lines network.
DL 351 arrived on time 86% of the time, versus 81% across the Delta Air Lines network.
The breakdown
- Mon86%(51 flights)
- Tue81%(52 flights)
- Wed92%(51 flights)
- Thu83%(52 flights)
- Fri80%(51 flights)
- Sat88%(50 flights)
- Sun88%(51 flights)
90%
May
Jun 90% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 90% | 29 |
| July 2025 | 87% | 30 |
| August 2025 | 97% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 90% | 31 |
| November 2025 | 93% | 30 |
| December 2025 | 63% | 30 |
| January 2026 | 90% | 31 |
| February 2026 | 81% | 26 |
| March 2026 | 63% | 30 |
| April 2026 | 86% | 29 |
| May 2026 | 90% | 31 |
- Departures on time
- 93%
- Diverted
- 1.1%
- Flights flown
- 358
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 365 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.