COS to SAN flight delays & on-time performance
Nonstop flights from City of Colorado Springs Municipal Airport to San Diego International Airport · 816 miles · Aug 2025 – Jul 2026
- SAN: Airport closed. Closed, expected to reopen Oct 11 at 13:00 UTC.
Key facts
- Flights from Colorado Springs (COS) to San Diego (SAN) arrived on time 66% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0% were cancelled, and 9% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 10am did best (86% on time); around 12pm did worst (61%).
- Saturday was the most reliable day to fly (74% on time) and Thursday the least (59%).
- The largest source of delay minutes was late-arriving aircraft (42%).
Which airline is most on time from COS to SAN?
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 |
|---|---|---|---|---|---|
| Southwest Airlines | 66% | 0.0% | 21 min | 9.5% | 169 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 10am86%21 flights
- 11am75%12 flights
- 12pm61%49 flights
- 2pm63%48 flights
- 3pm85%13 flights
- 6pm38%13 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday72%0.0% cancelled
- Tuesday33%0.0% cancelled
- Wednesday100%0.0% cancelled
- Thursday59%0.0% cancelled
- Friday59%0.0% cancelled
- Saturday74%0.0% cancelled
- Sunday68%0.0% 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 aircraft42%
- Air traffic control & airport congestion35%
- Airline (crew, maintenance, cleaning, fueling)23%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
No cancellation causes recorded in this period.
COS to SAN: common questions
- How often are COS to SAN flights on time?
- 66% 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 Colorado Springs to San Diego cancelled?
- 0.0% of scheduled flights were cancelled (0 of 169).
- How long are typical delays?
- Across all flights the average arrival delay was 21 min (early arrivals count as zero). Flights that were late arrived 57 min behind schedule on average, and 9.5% of flights were an hour or more late.
- How long is taxi time at COS?
- Flights on this route spent 14 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SAN to COS — 65% on time
More flights from Colorado Springs
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: COS → SAN, nonstop flights by US airlines that report to the DOT. How we calculate this.