Route on-time record
BIS to DEN: most on-time flights and the best time to fly
Bismarck (Bismarck Municipal Airport) to Denver (Denver International Airport). 1,536 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 0.8% were cancelled. The most reliable flight number was SkyWest 4738 at 6:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BIS → DEN
Bismarck to Denver: 1,536 nonstop flights a year
On time (12 months)
78%
Cancelled
0.8%
avg delay 25 min
Best time to leave
Before 9 AM
86% on time vs 58% 3 to 6 PM
Most reliable airline
SkyWest
77% 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 · SkyWest 4738 · sold as United Express, Delta Connection, American Eagle or Alaska
6:00 AM → 6:55 AM1h 57m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.6%
- Avg arrival delay
- 16 min
- Arrived on time 88% of the time (359 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 86% on time; 3 to 6 PM: 58%).
Strong track record · 359 flights
Find 6:00 AM flight fares Opens this date on Aviasales#2 · SkyWest 4694 · sold as United Express, Delta Connection, American Eagle or Alaska
1:45 PM → 2:40 PM1h 57m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.8%
- Avg arrival delay
- 17 min
- Arrived on time 85% of the time (355 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.
Strong track record · 355 flights
Find 1:45 PM flight fares Opens this date on Aviasales#3 · SkyWest 4710 · sold as United Express, Delta Connection, American Eagle or Alaska
9:00 AM → 9:55 AM1h 57m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
- On time (history)
- 71%
- Cancelled
- 0.6%
- Avg arrival delay
- 32 min
- Arrived on time 71% of the time (329 flights, Jun 2025 to May 2026).
Strong track record · 329 flights
Find 9:00 AM flight fares Opens this date on Aviasales#4 · SkyWest 5783 · sold as United Express, Delta Connection, American Eagle or Alaska
6:25 PM → 7:24 PM1h 59m nonstop
Local times, typical schedule. Last flown 2026-05-31.
71%
chance on time
- On time (history)
- 63%
- Cancelled
- 0.0%
- Avg arrival delay
- 34 min
- Arrived on time 63% of the time (8 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.
Limited track record · 8 flights
Find 6:25 PM flight fares Opens this date on Aviasales#5 · SkyWest 6024 · sold as United Express, Delta Connection, American Eagle or Alaska
5:05 PM → 6:00 PM1h 55m nonstop
Local times, typical schedule. Last flown 2026-05-20.
60%
chance on time
- On time (history)
- 59%
- Cancelled
- 0.0%
- Avg arrival delay
- 25 min
- Arrived on time 59% of the time (73 flights, Jun 2025 to May 2026).
- Never cancelled in 73 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 58% on time; Before 9 AM: 86%).
- 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 · 73 flights
Find 5:05 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)77%
1,536 flights · 78% on time as flown · 0.8% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM86%
456 flights · avg delay 18 min
- 9 AM to noon77%
380 flights · avg delay 24 min
- Noon to 3 PM85%
363 flights · avg delay 17 min
- 3 to 6 PM58%
289 flights · avg delay 45 min
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
- Airline (crew, maintenance, boarding)51%
- Air traffic control and airport volume22%
- Late-arriving aircraft20%
- Severe weather6%
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
BIS to DEN questions
- What time of day is best to fly BIS to DEN?
- Before 9 AM: 86% of flights arrived on time, against 58% 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 BIS to DEN?
- SkyWest, with a season-adjusted 77% chance of operating and arriving on time over 1,536 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 BIS to DEN?
- January (70% on time); the best was October (87%), 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 BIS
Live status: FAA delays and ground stops