SEA to CLE flight delays
Seattle, WA (SEA) Cleveland, OH (CLE) · 2,021 miles
455 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
75.83%
Arrived on time
Within 15 minutes of schedule
0.88%
Cancelled
Share of scheduled flights
43 min
When late, late by
Average across delayed arrivals
12 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In February it ran 35.4 points more punctual than in August — 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 route has been getting better. The later months in the record run 14 points more punctual than the earlier ones, which usually means a schedule that was too tight has been given more room.
The two directions do not behave alike. CLE to SEA arrives on time 12.7 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.
Only Alaska Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
Which airline should you fly on this route?
Over January 2025 – August 2026, Alaska Airlines arrived on time most often on SEA to CLE. Flights ran closest to schedule in February and worst in August.
Every airline on SEA to CLE
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 | 455 | 75.83% | 0.88% | 43 min | C |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
CLE to SEA Cleveland back to Seattle 63.15% on time FOther routes from Seattle
Common questions
Are flights from Seattle to Cleveland usually delayed?
75.83% of flights on the SEA to CLE route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is about the same as the average route in this record.
Which airlines fly from Seattle to Cleveland?
Only Alaska Airlines appears in the published record on this route, with 455 flights and 75.83% arriving on time.
How often are SEA to CLE 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 Cleveland?
February, when 95% of flights arrived on time. The worst was August at 59.6%.
When SEA to CLE flights are late, how late are they?
About 43 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 CLE 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 →