Route · CMH → SFO · 2020–2025 BTS data
Columbus to San Francisco
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), CMH to SFO (Columbus to San Francisco) ranks #4494 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 67.4%
- On-time
- -11.6 pts
- vs US avg
- 75 min
- Delay when late
- 1,015
- Flights
- #4494 of 4927
- Corpus placement
Cancelled
1.1%
Best Month
N/A
Worst Month
N/A
Distance
2,120 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Nov 2025 | 33 | 9 | 0 | 0 | UA |
| Oct 2025 | 31 | 6 | 0 | 0 | UA |
| Sep 2025 | 33 | 10 | 0 | 0 | UA |
| Aug 2025 | 32 | 7 | 1 | 0 | UA |
| Jul 2025 | 31 | 23 | 0 | 0 | UA |
| Jun 2025 | 30 | 13 | 0 | 0 | UA |
| May 2025 | 31 | 16 | 0 | 1 | UA |
| Apr 2025 | 30 | 8 | 0 | 0 | UA |
| Nov 2024 | 30 | 13 | 0 | 0 | UA |
| Oct 2024 | 31 | 12 | 0 | 0 | UA |
| Sep 2024 | 30 | 7 | 0 | 0 | UA |
| Aug 2024 | 31 | 12 | 0 | 0 | UA |
| Jul 2024 | 31 | 7 | 4 | 0 | UA |
| Jun 2024 | 30 | 4 | 1 | 0 | UA |
| May 2024 | 31 | 8 | 0 | 0 | UA |
| Apr 2024 | 30 | 12 | 0 | 0 | UA |
| Mar 2024 | 31 | 14 | 0 | 0 | UA |
| Nov 2023 | 30 | 4 | 0 | 0 | UA |
| Oct 2023 | 31 | 2 | 0 | 0 | UA |
| Sep 2023 | 30 | 3 | 0 | 0 | UA |
| Aug 2023 | 31 | 6 | 0 | 0 | UA |
| Jul 2023 | 31 | 7 | 1 | 0 | UA |
| Jun 2023 | 30 | 4 | 0 | 0 | UA |
| May 2023 | 31 | 20 | 1 | 0 | UA |
CMH–SFO seasonal on-time pattern
Best: October (82.3%) · weakest: December (40.0%)
Strongest calendar month
October
82.3% on-time · ~31 flights/mo
Busiest calendar month
January
~31 flights/mo avg
Weakest calendar month
December
40.0% on-time · ~30 flights/mo
Cancellation Rate
1.1%
8 of 740 flights
Diversion Rate
0.1%
1 of 740 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
CMH - Columbus
Full on-time, delay-cause, and seasonal performance for Columbus, OH.
CMH on-time profileSFO - San Francisco
Full on-time, delay-cause, and seasonal performance for San Francisco, CA.
SFO on-time profileCompare the two airports
See CMH and SFO side by side on delays, cancellations, and reliability.
Compare CMH vs SFOOrigin-hub reliability standing
Softer reliability from CMH
Among 33 routes leaving CMH, only 1 (including this one) clear below 75% on-time, while 13 stay ≥85% and 19 sit mid-band. Travelers comparing CMH options should weigh this 67.4% print against those peers · fleet on-time rank #4878 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to CMH–SFO.
Routes with a similar on-time rate
What the Data Says About CMH to SFO
On-time performance on the CMH to SFO pairing (Columbus to San Francisco) trails a chunk of the network: 67.4% of 1,015 tracked flights arrived on schedule, with a 75.0-minute average delay on the ones that ran late. The route spans about 2,120 miles across 1 carrier. Cancellations over the trailing 24 months hit 1.1% (8 of 740 flights), with 0.1% diverted.
Monthly performance data for this route did not show a clear best/worst split in the sample window; review the monthly table above for period-by-period detail.
On the multi-year calendar, CMH–SFO peaks in October at 82.3% on-time while January carries the heaviest traffic (~31 flights per month) ; the softest month is December at 40.0%, a 42.3-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does CMH to SFO rank among US routes by traffic? ▼
How often are flights delayed from CMH to SFO? ▼
What is the cancellation rate for CMH to SFO? ▼
How far is the flight from CMH to SFO? ▼
Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using CMH–SFO data
CMH–SFO sits 11.6 pts below the national 79% average; check the seasonal chart and airport profiles before treating the headline as typical.
- Compare CMH and SFO airport profiles: delay causes and top routes differ even on the same corridor. CMH airport
- If your dates flex, October (82.3% on-time) beats December (40.0%) on this corridor. Seasonal chart
- 4 other routes post a similar 67.4% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.