Cincinnati (CVG) to Seattle (SEA): On-Time Performance
Data through July 2026
The calendar drives reliability on CVG–SEA. September 2025 flights landed on schedule 95% of the time, but December 2025 dropped to 39% — a gap of 56 points. Across the full period the route averages 77% on-time against a national 78%.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 14 min
- completed flights
- Cancelled
- 1.0%
- Flights/day
- 2.2
- last 12 months
- Duration
- 5h 1m
- scheduled
- Distance
- 1,965 mi
Best airline from CVG to SEA
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 84% | 10 min | 0.9% | 755 |
| Alaska Airlines | 71% | 18 min | 1.1% | 849 |
Monthly on-time trend
Best time to fly from CVG to SEA
Aim for departures around 7 a.m. (87% on-time); avoid 8 a.m. departures (57%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 17 min |
| Tuesdaybest | 82% | 10 min |
| Wednesday | 81% | 10 min |
| Thursday | 73% | 14 min |
| Friday | 79% | 11 min |
| Saturday | 78% | 12 min |
| Sunday | 72% | 24 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft35%
- Airline operations30%
- National airspace system28%
- Weather6%
- Security1%
Frequently asked questions
- How often are flights from CVG to SEA delayed?
- 23% of CVG–SEA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 14 minutes.
- Which airline is most reliable from CVG to SEA?
- Delta Air Lines has the best on-time record on this route at 84%, based on 755 flights. 2 airlines flew CVG–SEA frequently enough to compare in this period.
- What is the best time of day to fly from CVG to SEA?
- Departures around 7 a.m. have the best record (87% on-time), while departures around 8 a.m. have the worst (57%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from CVG to SEA?
- The scheduled CVG–SEA flight time averages 5h 1m over 1,965 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are CVG to SEA flights cancelled?
- 1% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from CVG to SEA?
- December 2025 was the roughest month in this dataset, with only 39% of arrivals on time. The best was September 2025 at 95%. If your dates are flexible, that 56-point gap is worth planning around.
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Based on 1,604 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.