DEN to TUS flight delays & on-time performance
Nonstop flights from Denver International Airport to Tucson International Airport · 639 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at DEN or TUS right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Denver (DEN) to Tucson (TUS) arrived on time 77% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.3% were cancelled, and 7% arrived an hour or more late.
- SkyWest Airlines was the most punctual airline here (86% on time); Southwest Airlines was the least (71%).
- Departures scheduled around 8am did best (93% on time); around 5pm did worst (57%).
- Tuesday was the most reliable day to fly (85% on time) and Friday the least (73%).
- The largest source of delay minutes was late-arriving aircraft (51%).
Which airline is most on time from DEN to TUS?
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 |
|---|---|---|---|---|---|
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 86% | 0.3% | 10 min | 4.8% | 591 |
| Frontier Airlines | 81% | 1.2% | 11 min | 3.5% | 86 |
| United Airlines | 80% | 0.1% | 13 min | 7.2% | 866 |
| Southwest Airlines | 71% | 0.3% | 16 min | 7.9% | 1,186 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am86%293 flights
- 8am93%223 flights
- 9am80%94 flights
- 11am87%374 flights
- 1pm84%310 flights
- 2pm76%191 flights
- 3pm77%311 flights
- 4pm78%37 flights
- 5pm57%84 flights
- 6pm55%73 flights
- 7pm68%377 flights
- 8pm64%176 flights
- 9pm62%101 flights
- 10pm62%63 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday75%0.5% cancelled
- Tuesday85%0.3% cancelled
- Wednesday81%0.3% cancelled
- Thursday75%0.3% cancelled
- Friday73%0.2% cancelled
- Saturday81%0.3% cancelled
- Sunday73%0.2% 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 aircraft51%
- Airline (crew, maintenance, cleaning, fueling)34%
- Air traffic control & airport congestion13%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Air traffic control & airport congestion63%
- Airline (crew, maintenance, cleaning, fueling)25%
- Extreme weather13%
- Security0%
DEN to TUS: common questions
- How often are DEN to TUS flights on time?
- 77% 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 Denver to Tucson cancelled?
- 0.3% of scheduled flights were cancelled (8 of 2,729).
- How long are typical delays?
- Across all flights the average arrival delay was 14 min (early arrivals count as zero). Flights that were late arrived 55 min behind schedule on average, and 6.8% of flights were an hour or more late.
- How long is taxi time at DEN?
- Flights on this route spent 19 min taxiing from the gate to takeoff on average.
Related routes
Return trip: TUS to DEN — 83% on time
More flights from Denver
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: DEN → TUS, nonstop flights by US airlines that report to the DOT. How we calculate this.