Denver (DEN) to Birmingham (BHM): On-Time Performance
Data through May 2026
Denver (DEN) to Birmingham (BHM) effectively runs on two schedules. In November 2025, 86% of arrivals were on time; in June 2025 that fell to 50% — a 36-point seasonal swing. Across the full period the route averages 73% on-time against a national 78%. Morning departures also hold up better than evening ones (82% vs 67%), which matters most in the rough months.
- On-time
- 73%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 0.6%
- Flights/day
- 3.2
- last 12 months
- Duration
- 2h 48m
- scheduled
- Distance
- 1,083 mi
Best airline from DEN to BHM
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 78% | 13 min | 0.6% | 1,426 |
| Southwest Airlines | 63% | 23 min | 0.7% | 802 |
Monthly on-time trend
Best time to fly from DEN to BHM
Aim for departures around 11 a.m. (90% on-time); avoid 8 p.m. departures (49%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 15 min |
| Tuesday | 75% | 17 min |
| Wednesday | 69% | 16 min |
| Thursday | 73% | 17 min |
| Friday | 69% | 18 min |
| Saturday | 70% | 18 min |
| Sundaybest | 77% | 15 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft42%
- Airline operations37%
- National airspace system17%
- Weather5%
Frequently asked questions
- How often are flights from DEN to BHM delayed?
- 27% of DEN–BHM flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 17 minutes.
- Which airline is most reliable from DEN to BHM?
- SkyWest Airlines has the best on-time record on this route at 78%, based on 1,426 flights. 2 airlines flew DEN–BHM frequently enough to compare in this period.
- What is the best time of day to fly from DEN to BHM?
- Departures around 11 a.m. have the best record (90% on-time), while departures around 8 p.m. have the worst (49%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DEN to BHM?
- The scheduled DEN–BHM flight time averages 2h 48m over 1,083 miles. Actual arrival times vary — flights on this route land 15+ minutes late 27% of the time.
- How often are DEN to BHM flights cancelled?
- 0.6% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from DEN to BHM?
- June 2025 was the roughest month in this dataset, with only 50% of arrivals on time. The best was November 2025 at 86%. If your dates are flexible, that 36-point gap is worth planning around.
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Based on 2,259 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.