BOI to DEN flight delays & on-time performance
Nonstop flights from Boise Air Terminal/Gowen Field to Denver International Airport · 649 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BOI or DEN right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Boise (BOI) to Denver (DEN) arrived on time 82% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.1% 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 (79%).
- Departures scheduled around 5am did best (94% on time); around 4pm did worst (36%).
- Wednesday was the most reliable day to fly (85% on time) and Friday the least (74%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (37%).
Which airline is most on time from BOI 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. | 86% | 0.0% | 13 min | 5.4% | 900 |
| United Airlines | 81% | 0.2% | 18 min | 8.5% | 915 |
| Frontier Airlines | 81% | 0.0% | 22 min | 9.2% | 130 |
| Southwest Airlines | 79% | 0.2% | 13 min | 5.9% | 1,088 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am94%416 flights
- 6am93%292 flights
- 7am92%286 flights
- 8am80%51 flights
- 9am93%54 flights
- 10am89%489 flights
- 11am86%146 flights
- 12pm82%136 flights
- 1pm84%93 flights
- 2pm74%427 flights
- 3pm75%68 flights
- 4pm36%157 flights
- 5pm68%417 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday82%0.0% cancelled
- Tuesday85%0.2% cancelled
- Wednesday85%0.0% cancelled
- Thursday79%0.4% cancelled
- Friday74%0.2% cancelled
- Saturday85%0.0% cancelled
- Sunday82%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.
- Airline (crew, maintenance, cleaning, fueling)37%
- Air traffic control & airport congestion31%
- Late-arriving aircraft29%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)75%
- Air traffic control & airport congestion25%
- Extreme weather0%
- Security0%
BOI to DEN: common questions
- How often are BOI to DEN flights on time?
- 82% 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 Boise to Denver cancelled?
- 0.1% of scheduled flights were cancelled (4 of 3,033).
- How long are typical delays?
- Across all flights the average arrival delay was 15 min (early arrivals count as zero). Flights that were late arrived 75 min behind schedule on average, and 6.7% of flights were an hour or more late.
- How long is taxi time at BOI?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: DEN to BOI — 77% on time
More flights from Boise
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BOI → DEN, nonstop flights by US airlines that report to the DOT. How we calculate this.