DEN to BOI flight delays & on-time performance
Nonstop flights from Denver International Airport to Boise Air Terminal/Gowen Field · 649 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at DEN or BOI 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 Boise (BOI) arrived on time 77% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.1% were cancelled, and 6% arrived an hour or more late.
- SkyWest Airlines was the most punctual airline here (80% on time); Southwest Airlines was the least (72%).
- Departures scheduled around 7am did best (93% on time); around 8pm did worst (62%).
- Tuesday was the most reliable day to fly (82% on time) and Friday the least (72%).
- The largest source of delay minutes was late-arriving aircraft (50%).
Which airline is most on time from DEN to BOI?
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. | 80% | 0.1% | 15 min | 7.0% | 903 |
| Frontier Airlines | 80% | 0.0% | 10 min | 3.8% | 130 |
| United Airlines | 79% | 0.1% | 13 min | 6.2% | 915 |
| Southwest Airlines | 72% | 0.1% | 14 min | 5.5% | 1,089 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am93%459 flights
- 8am88%250 flights
- 9am81%110 flights
- 10am74%35 flights
- 11am84%376 flights
- 12pm63%41 flights
- 1pm71%131 flights
- 2pm75%52 flights
- 3pm73%445 flights
- 4pm80%46 flights
- 5pm74%66 flights
- 7pm72%394 flights
- 8pm62%378 flights
- 9pm71%165 flights
- 10pm59%88 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday74%0.0% cancelled
- Tuesday82%0.0% cancelled
- Wednesday81%0.5% cancelled
- Thursday76%0.2% cancelled
- Friday72%0.0% cancelled
- Saturday77%0.0% cancelled
- Sunday78%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 aircraft50%
- Airline (crew, maintenance, cleaning, fueling)30%
- Air traffic control & airport congestion16%
- Extreme weather4%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather67%
- Airline (crew, maintenance, cleaning, fueling)33%
- Air traffic control & airport congestion0%
- Security0%
DEN to BOI: common questions
- How often are DEN to BOI 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 Boise cancelled?
- 0.1% of scheduled flights were cancelled (3 of 3,037).
- 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 54 min behind schedule on average, and 6.1% 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: BOI to DEN — 82% 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 → BOI, nonstop flights by US airlines that report to the DOT. How we calculate this.