Best Time to Fly CLE to SEA: On-Time Stats by Hour & Airline
Cleveland-Hopkins International → Seattle/Tacoma International
Data through July 2026 · Last updated October 18, 2026
456 flights were scheduled from Cleveland (CLE) to Seattle (SEA) in the last 12 months, and 63.0% of those that flew arrived on time, 14.7 points below the US average of 77.6%.
Alaska Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (73% on time) and December the worst month (47%).
The cancellation rate was 1.8% (US average 1.8%).
CLE to SEA 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 |
|---|---|---|---|---|
| Alaska Airlines | 63.0% | 49 min | 1.8% | 456 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly CLE to SEA
On-time arrival % by scheduled departure hour (local time), 885 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 28 | |
| 7am–8am | 77.1% | 1.7% | 293 |
| 10am–11am | Limited data | 1 | |
| 5pm–6pm | 64.0% | 0.0% | 75 |
| 6pm–7pm | 69.4% | 1.0% | 301 |
| 7pm–8pm | 61.0% | 1.7% | 120 |
| 8pm–9pm | 46.1% | 3.0% | 67 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on CLE to SEA
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) | Limited data | 12 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 50.0% | -21.9 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 66.4% | -5.5 pts | 1.6% | 246 |
| All other days | 71.9% | — | 1.5% | 597 |
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).