CMH to SEA flight delays & on-time performance
Nonstop flights from John Glenn Columbus International Airport to Seattle–Tacoma International Airport · 2,016 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at CMH or SEA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Columbus (CMH) to Seattle (SEA) arrived on time 72% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.1% were cancelled, and 6% arrived an hour or more late.
- Departures scheduled around 6am did best (100% on time); around 6pm did worst (66%).
- Tuesday was the most reliable day to fly (81% on time) and Thursday the least (64%).
- The largest source of delay minutes was late-arriving aircraft (41%).
Which airline is most on time from CMH to SEA?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| American Airlines | 100% | 0.0% | 0 min | 0.0% | 1 |
| Delta Air Lines | 100% | 0.0% | 0 min | 0.0% | 1 |
| United Airlines | 100% | 0.0% | 0 min | 0.0% | 1 |
| Alaska Airlines | 72% | 1.1% | 15 min | 5.9% | 460 |
| Southwest Airlines | 0% | 0.0% | 54 min | 0.0% | 1 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am100%23 flights
- 7am81%108 flights
- 8am70%26 flights
- 6pm66%226 flights
- 7pm68%77 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday76%2.8% cancelled
- Tuesday81%0.0% cancelled
- Wednesday69%0.0% cancelled
- Thursday64%0.0% cancelled
- Friday71%0.0% cancelled
- Saturday73%1.9% cancelled
- Sunday73%2.8% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft41%
- Air traffic control & airport congestion30%
- Airline (crew, maintenance, cleaning, fueling)17%
- Extreme weather11%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)60%
- Extreme weather40%
- Air traffic control & airport congestion0%
- Security0%
CMH to SEA: common questions
- How often are CMH to SEA flights on time?
- 72% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Columbus to Seattle cancelled?
- 1.1% of scheduled flights were cancelled (5 of 464).
- How long are typical delays?
- Across all flights the average arrival delay was 15 min (early arrivals count as zero). Flights that were late arrived 47 min behind schedule on average, and 5.9% of flights were an hour or more late.
- How long is taxi time at CMH?
- Flights on this route spent 18 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SEA to CMH — 80% on time
More flights from Columbus
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: CMH → SEA, nonstop flights by US airlines that report to the DOT. How we calculate this.