Route · ASE → SFO · 2020–2025 BTS data
Aspen to San Francisco
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), ASE to SFO (Aspen to San Francisco) ranks #4134 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 72.1%
- On-time
- -6.9 pts
- vs US avg
- 107 min
- Delay when late
- 1,521
- Flights
- #4134 of 4927
- Corpus placement
Cancelled
8.9%
Best Month
Jan 2022 87%
Worst Month
Mar 2024 39%
Distance
848 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Aug 2025 | 37 | 9 | 0 | 0 | OO |
| Jul 2025 | 39 | 14 | 2 | 0 | OO |
| Jun 2025 | 31 | 10 | 0 | 0 | OO |
| Mar 2025 | 85 | 27 | 9 | 0 | OO |
| Feb 2025 | 67 | 18 | 10 | 0 | OO |
| Jan 2025 | 62 | 14 | 2 | 0 | OO |
| Dec 2024 | 32 | 14 | 3 | 0 | OO |
| Aug 2024 | 31 | 9 | 0 | 1 | OO |
| Jul 2024 | 31 | 4 | 1 | 1 | OO |
| Jun 2024 | 30 | 8 | 2 | 0 | OO |
| Mar 2024 | 61 | 37 | 3 | 1 | OO |
| Feb 2024 | 58 | 30 | 7 | 0 | OO |
| Jan 2024 | 62 | 20 | 4 | 0 | OO |
| Aug 2023 | 31 | 7 | 0 | 2 | OO |
| Jul 2023 | 31 | 9 | 0 | 0 | OO |
| Mar 2023 | 56 | 23 | 7 | 0 | OO |
| Feb 2023 | 56 | 18 | 5 | 0 | OO |
| Jan 2023 | 62 | 19 | 12 | 0 | OO |
| Dec 2022 | 34 | 15 | 4 | 0 | OO |
| Aug 2022 | 31 | 7 | 1 | 0 | OO |
| Jul 2022 | 31 | 2 | 0 | 0 | OO |
| Mar 2022 | 57 | 11 | 10 | 0 | OO |
| Feb 2022 | 56 | 11 | 10 | 0 | OO |
| Jan 2022 | 62 | 8 | 9 | 0 | OO |
ASE–SFO seasonal on-time pattern
Best: August (82.2%) · weakest: December (60.4%)
Strongest calendar month
August
82.2% on-time · ~32 flights/mo
Busiest calendar month
January
~62 flights/mo avg
Weakest calendar month
December
60.4% on-time · ~36 flights/mo
Cancellation Rate
8.9%
101 of 1,133 flights
Diversion Rate
0.4%
5 of 1,133 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
ASE - Aspen
Full on-time, delay-cause, and seasonal performance for Aspen, CO.
ASE 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 ASE and SFO side by side on delays, cancellations, and reliability.
Compare ASE vs SFOOrigin-hub reliability standing
Softer reliability from ASE
Among 7 routes leaving ASE, only 6 (including this one) clear below 75% on-time, while 0 stay ≥85% and 1 sit mid-band. Travelers comparing ASE options should weigh this 72.1% print against those peers · fleet on-time rank #4745 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to ASE–SFO.
Routes with a similar on-time rate
What the Data Says About ASE to SFO
On-time performance on the ASE to SFO pairing (Aspen to San Francisco) trails a chunk of the network: 72.1% of 1,521 tracked flights arrived on schedule, with a 107.4-minute average delay on the ones that ran late. The route spans about 848 miles across 1 carrier. Cancellations over the trailing 24 months hit 8.9% (101 of 1,133 flights), with 0.4% diverted.
The monthly split is wide on this route: Jan 2022 posted the strongest performance at 87% on-time, while Mar 2024 came in at just 39% - a 48-point swing worth factoring into travel timing.
On the multi-year calendar, ASE–SFO peaks in August at 82.2% on-time while January carries the heaviest traffic (~62 flights per month) ; the softest month is December at 60.4%, a 21.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does ASE to SFO rank among US routes by traffic? ▼
How often are flights delayed from ASE to SFO? ▼
What is the cancellation rate for ASE to SFO? ▼
How far is the flight from ASE to SFO? ▼
When is the best time to fly from ASE 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 ASE–SFO data
ASE–SFO sits 6.9 pts below the national 79% average; check the seasonal chart and airport profiles before treating the headline as typical.
- Compare ASE and SFO airport profiles: delay causes and top routes differ even on the same corridor. ASE airport
- If your dates flex, August (82.2% on-time) beats December (60.4%) on this corridor. Seasonal chart
- 4 other routes post a similar 72.1% 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.