Seattle (SEA) to Cincinnati / Covington (CVG) flights
Alaska Airlines, Delta Air Lines fly nonstop from Seattle-Tacoma International Airport to Cincinnati Northern Kentucky International Airport, with about 21 flights a week in July 2026. The 1,965-mile flight takes about 4h 14m gate to gate.
- Distance
- 1,965 mi · 3,162 km
- Flight time
- 4h 14m
- Airlines
- 2
- Seats filled
- 82%
Airlines flying SEA to CVG
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Alaska Airlines | 14 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 61,175 | 4h 17m |
| Delta Air Lines | 7 | Boeing 737-900ER, Boeing 737-800 | 51,423 | 4h 11m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SEA to CVG flight schedule
4 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 8:39am and the last at 10:05pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| AS 508Alaska Airlines | 8:39am | 4:04pm | 18 | 84% |
| AS 451Alaska Airlines | 10:05am | 5:39pm | 12 | 92% |
| DL 558Delta Air Lines | 11:40am | 7:04pm | 31 | 90% |
| AS 298Alaska Airlines | 10:05pm | 5:30am | 18 | 79% |
Is SEA to CVG on time?
From September 2025 to August 2026, 86% of 793 flights arrived within 15 minutes of schedule and 1.1% were cancelled. Flights leaving around 8am were the most punctual (91%), those around 10pm the least (80%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (52%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 431 | 83% | 8 min | 1.2% |
| Delta Air Lines | 362 | 90% | 7 min | 1.1% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 8am to 9am | 70 | 91% | |
| 10am to 11am | 165 | 82% | |
| 11am to 12pm | 405 | 89% | |
| 12pm to 1pm | 37 | 89% | |
| 1pm to 2pm | 32 | 81% | |
| 10pm to 11pm | 70 | 80% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 78 | 12,686 | |
| September 2025 | 60 | 9,451 | |
| October 2025 | 60 | 8,986 | |
| November 2025 | 57 | 7,602 | |
| December 2025 | 59 | 8,329 | |
| January 2026 | 59 | 6,537 | |
| February 2026 | 56 | 6,272 | |
| March 2026 | 60 | 8,337 | |
| April 2026 | 59 | 8,635 | |
| May 2026 | 62 | 8,774 | |
| June 2026 | 82 | 12,591 | |
| July 2026 | 93 | 14,398 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.