Route Reliability

Route reliability

Denver (DEN) to Nashville (BNA): which airline is most on time?

On-time arrivals, cancellations and long delays for every airline that reported nonstop flights from Denver, CO (DEN) to Nashville, TN (BNA), September 2025 to August 2026.

Historical performance Official DOT data through August 2026 · Not live flight status

Denver, CONashville, TN

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Three-letter airport codes, nonstop U.S. domestic flights. One direction at a time.

Route at a glance · September 2025 to August 2026

DEN to BNA

Denver, CO to Nashville, TN

On time
74.4%vs 75.6% U.S. average About average
Cancelled
0.5%vs 1.9% U.S. average Better than average
60+ min late
7.5%vs 8.1% U.S. average About average
Scheduled flights
3,617in 12 months3 airlines
Most reliable airline
United Airlines78.7% on time · 1,181 flights

On time about as often as the U.S. average, with fewer cancellations.

Compared with all U.S. flights, September 2025 to August 2026. “About average” means within 1.5 points for on time, 0.3 for cancelled and 1 for 60+ minutes late.

Airlines on this route

Ranked by on-time arrival

Airlines from DEN to BNA, September 2025 to August 2026. Rates are shares of all scheduled flights.
Airline On time Cancelled 60+ min late Avg delay when late Diverted Flights
1. United Airlines Most reliable 78.7% 0.4% 6.9% 60 min 0.3% 1,181
2. Frontier Airlines 76.1% 0.6% 7.5% 55 min 0.3% 318
3. Southwest Airlines 71.8% 0.6% 7.8% 54 min 0.1% 2,118

On time = arrived within 15 minutes of schedule. Avg delay when late = average arrival delay of flights 15+ minutes late. "Most reliable" needs at least 300 flights in 12 months. Tap a heading to sort.

What this means

United Airlines has the strongest record on this route.

  • United Airlines had the best on-time record from Denver (DEN) to Nashville (BNA): 78.7% of its 1,181 scheduled flights arrived within 15 minutes of schedule, compared with 71.8% for Southwest Airlines.
  • 0.5% of flights on this route were cancelled (about 1 in 200), 1.4 points lower than the U.S. average of 1.9%.
  • 7.5% of flights, about 1 in 13, arrived an hour or more late. When a flight was late (15+ minutes), the average arrival delay was 55 min.
  • Overall, 74.4% of flights on this route arrived on time, 1.2 points lower than the U.S. average of 75.6%.
  • Over the last 3 years, September was the most reliable month on this route (82.0% on time) and June the least reliable (65.3%).
  • Cancellations peaked in January, when 4.9% of flights were cancelled.
  • Flights scheduled to depart before 6 am were the most punctual (96.4% on time); flights scheduled to depart 8 pm to 9 pm were the least (49.6%).
  • In the other direction, Nashville (BNA) to Denver (DEN), 73.5% of flights were on time and 0.6% were cancelled. Compare airlines BNA to DEN.

Best and worst months to fly DEN to BNA

Jan 74.2%
Feb 80.8%
Mar 77.1%
Apr 76.8%
May 70.9%
Jun 65.3%
Jul 65.8%
Aug 75.2%
Sep 82.0%
Oct 79.8%
Nov 81.4%
Dec 78.1%
Share of scheduled flights on time 12-month average 74.4%
All airlines combined, by calendar month, September 2023 to August 2026 (3 years pooled). Scale starts at zero.
Show as table
PeriodOn timeFlights
January 74.2% 842
February 80.8% 788
March 77.1% 977
April 76.8% 946
May 70.9% 1,004
June 65.3% 1,041
July 65.8% 1,087
August 75.2% 975
September 82.0% 988
October 79.8% 1,048
November 81.4% 976
December 78.1% 957
Best and worst calendar month by airline, September 2023 to August 2026.
AirlineBest monthWorst month
United Airlines April (86.0%) July (69.1%)
Frontier Airlines November (83.3%) April (69.8%)
Southwest Airlines September (81.5%) June (60.5%)

Month by month, last 12 months

Sep 77.5%
Oct 77.4%
Nov 79.9%
Dec 71.7%
Jan 80.9%
Feb 86.5%
Mar 74.3%
Apr 79.9%
May 69.7%
Jun 63.5%
Jul 66.9%
Aug 70.9%
Share of scheduled flights on time U.S. average 75.6%
All airlines combined, September 2025 to August 2026. Scale starts at zero.
Show as table
PeriodOn timeFlights
Sep 2025 77.5% 315
Oct 2025 77.4% 323
Nov 2025 79.9% 288
Dec 2025 71.7% 279
Jan 2026 80.9% 256
Feb 2026 86.5% 252
Mar 2026 74.3% 307
Apr 2026 79.9% 284
May 2026 69.7% 314
Jun 2026 63.5% 340
Jul 2026 66.9% 353
Aug 2026 70.9% 306

Best and worst departure times

<6a 96.4%
6a 96.9%
7a 91.7%
8a 91.4%
9a 82.4%
10a 81.5%
11a 69.5%
12p 67.7%
1p 72.4%
2p 62.8%
3p 56.2%
4p 62.2%
5p 64.9%
6p 64.9%
7p 45.4%
8p 49.6%
9p Insufficient sample
Share of scheduled flights on time
By scheduled local departure hour at DEN, September 2025 to August 2026. Hours with no scheduled flights are omitted. Scale starts at zero.
Show as table
PeriodOn timeFlights
Departing before 6 am 96.4% 248
Departing 6 am to 7 am 96.9% 96
Departing 7 am to 8 am 91.7% 290
Departing 8 am to 9 am 91.4% 279
Departing 9 am to 10 am 82.4% 465
Departing 10 am to 11 am 81.5% 222
Departing 11 am to noon 69.5% 118
Departing noon to 1 pm 67.7% 158
Departing 1 pm to 2 pm 72.4% 326
Departing 2 pm to 3 pm 62.8% 145
Departing 3 pm to 4 pm 56.2% 208
Departing 4 pm to 5 pm 62.2% 135
Departing 5 pm to 6 pm 64.9% 407
Departing 6 pm to 7 pm 64.9% 268
Departing 7 pm to 8 pm 45.4% 97
Departing 8 pm to 9 pm 49.6% 121
Departing 9 pm to 10 pm Insufficient sample 34
Woman at an airport window watching a plane take off
Photo: Depositphotos (licensed stock, illustrative only). Credits

Sources & data dates

Source
U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
Period
September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
Data through
August 2026
Processed
2026-11-03
Scope
Nonstop scheduled flights from Denver, CO (DEN) to Nashville, TN (BNA), one direction. Airlines that report to the DOT only.
Method
Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.

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