SEA to CVG flight delays
Seattle, WA (SEA) Cincinnati, KY (CVG) · 1,965 miles
793 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
81.69%
Arrived on time
Within 15 minutes of schedule
0.88%
Cancelled
Share of scheduled flights
51 min
When late, late by
Average across delayed arrivals
10 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. Delta Air Lines arrived on time 9.9 points more often than Alaska Airlines over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
The season swings this route hard. In September it ran 28.4 points more punctual than in July — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The two directions do not behave alike. CVG to SEA arrives on time 7.3 points less often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
The Seattle to Cincinnati route sits close to the middle of the record — neither notably punctual nor notably late.
Which airline should you fly on this route?
Over January 2025 – August 2026, Delta Air Lines arrived on time most often on SEA to CVG. Alaska Airlines was late most often. Flights ran closest to schedule in September and worst in July.
Every airline on SEA to CVG
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Alaska Airlines | 431 | 77.18% | 0.93% | 46 min | C |
| Delta Air Lines | 362 | 87.08% | 0.83% | 62 min | A |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
CVG to SEA Cincinnati back to Seattle 74.36% on time DOther routes from Seattle
Common questions
Are flights from Seattle to Cincinnati usually delayed?
81.69% of flights on the SEA to CVG route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airline is most on time from Seattle to Cincinnati?
Delta Air Lines, at 87.08% on time across 362 flights. The least punctual on the route was Alaska Airlines at 77.18%.
How often are SEA to CVG flights cancelled?
0.88% of scheduled flights did not operate — about 9 in every thousand. That is in the normal range.
What is the best month to fly Seattle to Cincinnati?
September, when 91.7% of flights arrived on time. The worst was July at 63.3%.
When SEA to CVG flights are late, how late are they?
About 51 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on SEA to CVG during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →