Route · SFO → ASE · 2020–2025 BTS data
San Francisco to Aspen
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SFO to ASE (San Francisco to Aspen) ranks #4132 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 72.9%
- On-time
- -6.1 pts
- vs US avg
- 109 min
- Delay when late
- 1,523
- Flights
- #4132 of 4927
- Corpus placement
Cancelled
5.3%
Best Month
Feb 2022 82%
Worst Month
Feb 2024 62%
Distance
848 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Aug 2025 | 37 | 11 | 0 | 0 | OO |
| Jul 2025 | 39 | 13 | 1 | 0 | OO |
| Jun 2025 | 32 | 4 | 0 | 2 | OO |
| Mar 2025 | 85 | 21 | 5 | 5 | OO |
| Feb 2025 | 68 | 19 | 5 | 1 | OO |
| Jan 2025 | 62 | 17 | 1 | 1 | OO |
| Dec 2024 | 33 | 19 | 1 | 1 | OO |
| Aug 2024 | 31 | 11 | 0 | 0 | OO |
| Jul 2024 | 31 | 10 | 1 | 0 | OO |
| Jun 2024 | 30 | 12 | 2 | 0 | OO |
| Mar 2024 | 62 | 22 | 5 | 2 | OO |
| Feb 2024 | 58 | 22 | 4 | 4 | OO |
| Jan 2024 | 62 | 19 | 2 | 3 | OO |
| Aug 2023 | 31 | 2 | 0 | 0 | OO |
| Jul 2023 | 31 | 6 | 0 | 0 | OO |
| Mar 2023 | 57 | 12 | 2 | 7 | OO |
| Feb 2023 | 56 | 18 | 6 | 3 | OO |
| Jan 2023 | 62 | 21 | 9 | 3 | OO |
| Dec 2022 | 34 | 20 | 2 | 0 | OO |
| Aug 2022 | 31 | 3 | 1 | 0 | OO |
| Jul 2022 | 31 | 4 | 0 | 0 | OO |
| Mar 2022 | 56 | 14 | 3 | 4 | OO |
| Feb 2022 | 56 | 10 | 5 | 5 | OO |
| Jan 2022 | 61 | 14 | 5 | 5 | OO |
SFO–ASE seasonal on-time pattern
Best: August (81.8%) · weakest: December (59.0%)
Strongest calendar month
August
81.8% on-time · ~32 flights/mo
Busiest calendar month
January
~62 flights/mo avg
Weakest calendar month
December
59.0% on-time · ~36 flights/mo
Cancellation Rate
5.3%
60 of 1,136 flights
Diversion Rate
4.0%
46 of 1,136 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SFO - San Francisco
Full on-time, delay-cause, and seasonal performance for San Francisco, CA.
SFO on-time profileASE - Aspen
Full on-time, delay-cause, and seasonal performance for Aspen, CO.
ASE on-time profileCompare the two airports
See SFO and ASE side by side on delays, cancellations, and reliability.
Compare SFO vs ASEOrigin-hub reliability standing
Softer reliability from SFO
Among 73 routes leaving SFO, only 3 (including this one) clear below 75% on-time, while 20 stay ≥85% and 50 sit mid-band. Travelers comparing SFO options should weigh this 72.9% print against those peers · fleet on-time rank #4697 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to SFO–ASE.
Routes with a similar on-time rate
What the Data Says About SFO to ASE
On-time performance on the SFO to ASE pairing (San Francisco to Aspen) trails a chunk of the network: 72.9% of 1,523 tracked flights arrived on schedule, with a 109.1-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 5.3% (60 of 1,136 flights), with 4.0% diverted.
The monthly split is wide on this route: Feb 2022 posted the strongest performance at 82% on-time, while Feb 2024 came in at just 62% - a 20-point swing worth factoring into travel timing.
On the multi-year calendar, SFO–ASE peaks in August at 81.8% on-time while January carries the heaviest traffic (~62 flights per month) ; the softest month is December at 59.0%, a 22.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does SFO to ASE rank among US routes by traffic? ▼
How often are flights delayed from SFO to ASE? ▼
What is the cancellation rate for SFO to ASE? ▼
How far is the flight from SFO to ASE? ▼
When is the best time to fly from SFO to ASE? ▼
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 SFO–ASE data
SFO–ASE sits 6.1 pts below the national 79% average; check the seasonal chart and airport profiles before treating the headline as typical.
- Compare SFO and ASE airport profiles: delay causes and top routes differ even on the same corridor. SFO airport
- If your dates flex, August (81.8% on-time) beats December (59.0%) on this corridor. Seasonal chart
- 4 other routes post a similar 72.9% 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.