Flight Reliability
B6 397 · JetBlue Airways
Boston → Seattle (BOS–SEA)
95
Nerd Approved
WanderNerd Reliability Score
- 90%
- Arrive within 15 minutes
- 8 min early
- Average arrival delay
- 0.6%
- Cancelled
- 19 min early
- Median arrival delay
Based on 165 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
B6 397 arrived on time 96% of the time on Mondays. On Sundays: 83%.
Well ahead of the BOS–SEA route.
B6 397 arrived on time 90% of the time, versus 71% across the BOS–SEA route.
Well ahead of the JetBlue Airways network.
B6 397 arrived on time 90% of the time, versus 73% across the JetBlue Airways network.
Ticking up lately.
B6 397 arrived on time 91% of the time over the last three months in the data, compared with 88% in the three months before that.
The breakdown
- Mon96%(23 flights)
- Tue91%(23 flights)
- Wed96%(23 flights)
- Thu87%(23 flights)
- Fri83%(24 flights)
- Sat92%(24 flights)
- Sun83%(24 flights)
89%
May
Jun 100% → May 89% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 100% | 30 |
| July 2025 | 77% | 30 |
| August 2025 | 87% | 31 |
| September 2025 | 97% | 30 |
| October 2025 | 88% | 25 |
| May 2026 | 89% | 18 |
- Departures on time
- 90%
- Diverted
- 0%
- Flights flown
- 164
- Months covered
- 6
Same route, other flights
Keep nerding
Based on 165 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.