Route
CMH → SEA
John Glenn Columbus International Airport Seattle–Tacoma International Airport
2,016 miles
Return route SEA → CMH →
How punctual is this route?
- On-time arrivals
- 70.9%
- Less than 15 minutes late
- Cancelled
- 1.1%
- Of scheduled flights
- Average delay when late
- 56 min
- Flights arriving 15+ minutes late
- Flights tracked
- 469
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 48%
- Air traffic control & airport 27%
- Airline (crew, maintenance, cleaning) 14%
- Extreme weather 10%
- Security 1%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 88.5% | 52 |
| October 2025 | 75.8% | 33 |
| November 2025 | 82.8% | 29 |
| December 2025 | 38.7% | 31 |
| January 2026 | 52.4% | 23 |
| February 2026 | 75.0% | 21 |
| March 2026 | 56.0% | 26 |
| April 2026 | 72.4% | 30 |
| May 2026 | 72.7% | 44 |
| June 2026 | 77.2% | 57 |
| July 2026 | 72.1% | 61 |
| August 2026 | 66.1% | 62 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Alaska Airlines | 465 | 70.9% | 1.1% | 56 min |
| American Airlines | 1 | 100.0% | 0.0% | — |
| Delta Air Lines | 1 | 100.0% | 0.0% | — |
| United Airlines | 1 | 100.0% | 0.0% | — |
| Southwest Airlines | 1 | 0.0% | 0.0% | 54 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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