Houston (IAH) to Nashville (BNA): On-Time Performance
Data through May 2026
When you fly IAH to BNA matters as much as anything else about the booking: the route swung from 87% on-time in January 2026 to just 60% in July 2025. Across the full period the route averages 75% on-time against a national 78%. Morning departures also hold up better than evening ones (85% vs 70%), which matters most in the rough months.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 1.4%
- Flights/day
- 3.9
- last 12 months
- Duration
- 2h 4m
- scheduled
- Distance
- 657 mi
Best airline from IAH to BNA
4 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlinesmost reliable | 79% | 13 min | 1.8% | 163 |
| United Airlines | 76% | 17 min | 0.9% | 1,885 |
| SkyWest Airlines | 73% | 23 min | 1.8% | 913 |
| Spirit Airlines | 71% | 14 min | 10.4% | 77 |
Monthly on-time trend
Best time to fly from IAH to BNA
Aim for departures around 7 a.m. (88% on-time); avoid 7 p.m. departures (61%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 18 min |
| Tuesday | 77% | 20 min |
| Wednesdaybest | 77% | 15 min |
| Thursday | 73% | 21 min |
| Friday | 74% | 19 min |
| Saturdaybest | 77% | 16 min |
| Sunday | 74% | 20 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft36%
- Airline operations37%
- National airspace system18%
- Weather9%
Frequently asked questions
- How often are flights from IAH to BNA delayed?
- 25% of IAH–BNA 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 18 minutes.
- Which airline is most reliable from IAH to BNA?
- Southwest Airlines has the best on-time record on this route at 79%, based on 163 flights. 4 airlines flew IAH–BNA frequently enough to compare in this period.
- What is the best time of day to fly from IAH to BNA?
- Departures around 7 a.m. have the best record (88% on-time), while departures around 7 p.m. have the worst (61%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from IAH to BNA?
- The scheduled IAH–BNA flight time averages 2h 4m over 657 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are IAH to BNA flights cancelled?
- 1.4% 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 IAH to BNA?
- July 2025 was the roughest month in this dataset, with only 60% of arrivals on time. The best was January 2026 at 87%. If your dates are flexible, that 27-point gap is worth planning around.
Explore related pages
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Related guides
Based on 3,038 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.