Best Time to Fly SEA to BLI: On-Time Stats by Hour & Airline
Seattle/Tacoma International → Bellingham International
Data through July 2026 · Last updated October 18, 2026
1,216 flights were scheduled from Seattle (SEA) to Bellingham (BLI) in the last 12 months, and 85.0% of those that flew arrived on time, 7.4 points above the US average of 77.6%.
SkyWest Airlines was the only reporting airline with regular flights on this route.
April has been the best month (89% on time) and Friday the weakest day of the week (78%).
2.3% of flights were cancelled, versus 1.8% nationally.
SEA to BLI on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlines | 85.0% | 51 min | 2.3% | 1,216 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SEA to BLI
On-time arrival % by scheduled departure hour (local time), 2,421 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 10am–11am | 88.6% | 2.2% | 45 |
| 11am–12pm | 75.7% | 1.7% | 472 |
| 12pm–1pm | 81.5% | 0.0% | 211 |
| 1pm–2pm | Limited data | 20 | |
| 2pm–3pm | 80.4% | 2.4% | 246 |
| 3pm–4pm | 78.6% | 0.0% | 98 |
| 4pm–5pm | 80.3% | 1.1% | 180 |
| 5pm–6pm | 85.1% | 0.0% | 94 |
| 7pm–8pm | 74.5% | 0.0% | 47 |
| 8pm–9pm | 86.8% | 2.4% | 209 |
| 9pm–10pm | 68.9% | 0.0% | 74 |
| 10pm–11pm | Limited data | 5 | |
| 11pm–12am | 87.7% | 3.1% | 720 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SEA to BLI
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 82.9% | +0.3 pts | 4.7% | 43 |
| Christmas & New Year (Dec 20 - Jan 3) | 88.5% | +5.9 pts | 5.0% | 101 |
| Summer peak (Jun 15 - Aug 15) | 78.3% | -4.3 pts | 0.7% | 432 |
| All other days | 82.7% | — | 1.8% | 1,845 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).