Denver (DEN) to Birmingham (BHM): On-Time Performance
Data through July 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 72% on-time against a national 78%. Morning departures also hold up better than evening ones (81% vs 66%), which matters most in the rough months.
- On-time
- 72%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 0.6%
- Flights/day
- 3.3
- last 12 months
- Duration
- 2h 48m
- scheduled
- Distance
- 1,083 mi
Best airline from DEN to BHM
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 78% | 14 min | 0.6% | 1,426 |
| United Airlines | 74% | 16 min | 0.0% | 92 |
| Southwest Airlines | 63% | 23 min | 0.8% | 886 |
Monthly on-time trend
Best time to fly from DEN to BHM
Aim for departures around 11 a.m. (89% on-time); avoid 7 p.m. departures (50%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 17 min |
| Tuesdaybest | 75% | 17 min |
| Wednesday | 71% | 17 min |
| Thursday | 72% | 17 min |
| Friday | 69% | 18 min |
| Saturday | 71% | 17 min |
| Sunday | 74% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft43%
- Airline operations36%
- National airspace system16%
- Weather5%
Frequently asked questions
- How often are flights from DEN to BHM delayed?
- 28% of DEN–BHM flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. 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. 3 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 (89% on-time), while departures around 7 p.m. have the worst (50%). 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 28% of the time.
- How often are DEN to BHM flights cancelled?
- 0.6% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, 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 2,404 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.