Route on-time record
BOI to DEN: most on-time flights and the best time to fly
Boise (Boise Air Terminal/Gowen Field) to Denver (Denver International Airport). 3,036 nonstop flights in Jun 2025 to May 2026, 81% arrived within 15 minutes and 0.2% were cancelled. The most reliable flight number was United 1782 at 6:15 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BOI → DEN
Boise to Denver: 3,036 nonstop flights a year
On time (12 months)
81%
Cancelled
0.2%
avg delay 16 min
Best time to leave
Before 9 AM
93% on time vs 60% 3 to 6 PM
Most reliable airline
SkyWest
84% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · United 1782
6:15 AM → 8:18 AM2h 03m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
- On time (history)
- 92%
- Cancelled
- 0.9%
- Avg arrival delay
- 10 min
- Arrived on time 92% of the time (335 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 3 to 6 PM: 60%).
Strong track record · 335 flights
Find United 1782 fares Opens this date on Aviasales#2 · SkyWest 5924 · sold as United Express, Delta Connection, American Eagle or Alaska
5:00 AM → 7:05 AM2h 05m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 89% of the time (178 flights, Jun 2025 to May 2026).
- Never cancelled in 178 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 3 to 6 PM: 60%).
Moderate track record · 178 flights
Find 5:00 AM flight fares Opens this date on Aviasales#3 · SkyWest 6041 · sold as United Express, Delta Connection, American Eagle or Alaska
10:35 AM → 12:45 PM2h 10m nonstop
Local times, typical schedule. Last flown 2026-05-20.
89%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 90% of the time (98 flights, Jun 2025 to May 2026).
- Never cancelled in 98 scheduled flights.
Moderate track record · 98 flights
Find 10:35 AM flight fares Opens this date on Aviasales#4 · Southwest 1194
7:05 AM → 9:05 AM1h 55m nonstop
Local times, typical schedule. Last flown 2026-04-06.
89%
chance on time
- On time (history)
- 94%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 94% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 3 to 6 PM: 60%).
- Short track record (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find Southwest 1194 fares Opens this date on Aviasales#5 · United 517
10:41 AM → 12:41 PM2h 00m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (9 flights, Jun 2025 to May 2026).
- Short track record (9 flights), so its score leans on the airline's record at this hour.
Limited track record · 9 flights
Find United 517 fares Opens this date on Aviasales#6 · Southwest 4625
10:05 AM → 12:00 PM1h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
- On time (history)
- 94%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 94% of the time (32 flights, Jun 2025 to May 2026).
- Never cancelled in 32 scheduled flights.
- Short track record (32 flights), so its score leans on the airline's record at this hour.
Limited track record · 32 flights
Find Southwest 4625 fares Opens this date on Aviasales#7 · Southwest 2061
7:50 AM → 9:45 AM1h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 85% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 3 to 6 PM: 60%).
- Short track record (55 flights), so its score leans on the airline's record at this hour.
Limited track record · 55 flights
Find Southwest 2061 fares Opens this date on Aviasales#8 · Southwest 1793
12:05 PM → 2:00 PM1h 55m nonstop
Local times, typical schedule. Last flown 2026-05-29.
79%
chance on time
- On time (history)
- 87%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 87% of the time (23 flights, Jun 2025 to May 2026).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 1793 fares Opens this date on Aviasales#9 · Southwest 2974
3:15 PM → 5:05 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-27.
78%
chance on time
- On time (history)
- 81%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 81% of the time (16 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 60% on time; Before 9 AM: 93%).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 2974 fares Opens this date on Aviasales#10 · SkyWest 5837 · sold as United Express, Delta Connection, American Eagle or Alaska
5:29 PM → 7:40 PM2h 11m nonstop
Local times, typical schedule. Last flown 2026-05-20.
77%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 15 min
- Arrived on time 82% of the time (135 flights, Jun 2025 to May 2026).
- Never cancelled in 135 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 60% on time; Before 9 AM: 93%).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 135 flights
Find 5:29 PM flight fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)84%
862 flights · 85% on time as flown · 0.0% cancel
- United Airlines81%
955 flights · 80% on time as flown · 0.5% cancel
- Southwest Airlines78%
1,097 flights · 78% on time as flown · 0.2% cancel
- Frontier Airlines76%
122 flights · 75% on time as flown · 0.1% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM93%
1,046 flights · avg delay 7 min
- 9 AM to noon87%
683 flights · avg delay 11 min
- Noon to 3 PM75%
664 flights · avg delay 22 min
- 3 to 6 PM60%
642 flights · avg delay 28 min
Best day: Wednesday (86%). Worst: Friday (79%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Air traffic control and airport volume39%
- Airline (crew, maintenance, boarding)31%
- Late-arriving aircraft26%
- Severe weather4%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
BOI to DEN questions
- What time of day is best to fly BOI to DEN?
- Before 9 AM: 93% of flights arrived on time, against 60% for departures 3 to 6 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from BOI to DEN?
- SkyWest, with a season-adjusted 84% chance of operating and arriving on time over 862 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on BOI to DEN?
- July (75% on time); the best was October (88%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from BOI
- DEN to BOI (return)
- BOI to SEA 86%
- BOI to PHX 84%
- BOI to SLC 92%
- BOI to SFO 75%
- BOI to LAS 82%
- BOI to LAX 93%
- BOI to PDX 91%
- BOI to ORD 76%
- BOI to SAN 83%
- BOI to SMF 84%
- BOI to DFW 82%
- BOI to MSP 88%
Live status: FAA delays and ground stops