Flight Reliability
DL 3775 · Delta Air Lines
Boise → Seattle (BOI–SEA)
100
Nerd Approved
WanderNerd Reliability Score
- 97%
- Arrive within 15 minutes
- 13 min early
- Average arrival delay
- 0%
- Cancelled
- 16 min early
- Median arrival delay
Based on 361 historical flights. Data through May 2026.
What the data says
Monday has been the better bet.
A small edge: 98% on time on Mondays against 94% on Sundays.
Better than the BOI–SEA route average.
DL 3775 arrived on time 97% of the time, versus 82% across the BOI–SEA route.
Well ahead of the Delta Air Lines network.
DL 3775 arrived on time 97% of the time, versus 81% across the Delta Air Lines network.
It basically never cancels.
Out of 361 scheduled flights, only 0.0% were cancelled.
The breakdown
- Mon98%(52 flights)
- Tue96%(52 flights)
- Wed98%(51 flights)
- Thu96%(50 flights)
- Fri98%(50 flights)
- Sat98%(52 flights)
- Sun94%(53 flights)
100%
May
Jun 100% → May 100% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 100% | 30 |
| July 2025 | 100% | 31 |
| August 2025 | 100% | 31 |
| September 2025 | 100% | 30 |
| October 2025 | 100% | 31 |
| November 2025 | 90% | 30 |
| December 2025 | 89% | 28 |
| January 2026 | 90% | 29 |
| February 2026 | 100% | 28 |
| March 2026 | 97% | 31 |
| April 2026 | 97% | 30 |
| May 2026 | 100% | 31 |
- Departures on time
- 97%
- Diverted
- 0.3%
- Flights flown
- 360
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 361 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.