GTF to DEN flight delays & on-time performance
Nonstop flights from Great Falls International Airport to Denver International Airport · 623 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at GTF or DEN right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Great Falls (GTF) to Denver (DEN) arrived on time 86% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1% were cancelled, and 7% arrived an hour or more late.
- SkyWest Airlines was the most punctual airline here (91% on time); United Airlines was the least (83%).
- Departures scheduled around 6am did best (92% on time); around 2pm did worst (80%).
- Sunday was the most reliable day to fly (90% on time) and Friday the least (78%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (37%).
Which airline is most on time from GTF to DEN?
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. | 91% | 1.0% | 11 min | 4.5% | 201 |
| United Airlines | 83% | 0.9% | 18 min | 8.3% | 527 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am92%297 flights
- 7am90%68 flights
- 2pm80%363 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday88%0.0% cancelled
- Tuesday87%1.0% cancelled
- Wednesday86%1.9% cancelled
- Thursday85%1.0% cancelled
- Friday78%0.0% cancelled
- Saturday85%1.9% cancelled
- Sunday90%1.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)37%
- Air traffic control & airport congestion25%
- Late-arriving aircraft20%
- Extreme weather18%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)43%
- Extreme weather29%
- Air traffic control & airport congestion29%
- Security0%
GTF to DEN: common questions
- How often are GTF to DEN flights on time?
- 86% 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 Great Falls to Denver cancelled?
- 1.0% of scheduled flights were cancelled (7 of 728).
- How long are typical delays?
- Across all flights the average arrival delay was 16 min (early arrivals count as zero). Flights that were late arrived 109 min behind schedule on average, and 7.2% of flights were an hour or more late.
- How long is taxi time at GTF?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: GTF → DEN, nonstop flights by US airlines that report to the DOT. How we calculate this.