Flight Reliability
HA 821 · Hawaiian Airlines
Seattle → Honolulu (SEA–HNL)
57
A Little Dicey
WanderNerd Reliability Score
- 55%
- Arrive within 15 minutes
- 24 min
- Average arrival delay
- 0%
- Cancelled
- 12 min
- Median arrival delay
Based on 65 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
HA 821 arrived on time 70% of the time on Mondays and just 30% on Sundays. That gap is worth planning around.
Lagging the SEA–HNL route.
HA 821 arrived on time 55% of the time, versus 66% across the SEA–HNL route.
Well behind the Hawaiian Airlines network.
HA 821 arrived on time 55% of the time, versus 83% across the Hawaiian Airlines network.
The breakdown
- Mon70%(10 flights)
- Tue70%(10 flights)
- Wed70%(10 flights)
- Thu—(8 flights)
- Fri—(9 flights)
- Sat—(8 flights)
- Sun30%(10 flights)
- Departures on time
- 63%
- Diverted
- 0%
- Flights flown
- 65
- Months covered
- 3
Same route, other flights
Keep nerding
Based on 65 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.