Route Reliability

Route reliability

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

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

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

Nashville, TNDenver, CO

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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

BNA to DEN

Nashville, TN to Denver, CO

On time
73.5%vs 75.6% U.S. average Worse than average
Cancelled
0.6%vs 1.9% U.S. average Better than average
60+ min late
8.7%vs 8.1% U.S. average About average
Scheduled flights
3,632in 12 months3 airlines
Most reliable airline
Frontier Airlines79.6% on time · 319 flights

On time less often than 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 BNA to DEN, 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. Frontier Airlines Most reliable 79.6% 0.9% 8.5% 77 min 0.3% 319
2. United Airlines 78.3% 0.8% 9.1% 86 min 0.5% 1,181
3. Southwest Airlines 69.9% 0.4% 8.6% 54 min 0.2% 2,132

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

Frontier Airlines has the strongest record on this route.

  • Frontier Airlines had the best on-time record from Nashville (BNA) to Denver (DEN): 79.6% of its 319 scheduled flights arrived within 15 minutes of schedule, compared with 69.9% for Southwest Airlines.
  • 0.6% of flights on this route were cancelled (about 1 in 167), 1.3 points lower than the U.S. average of 1.9%.
  • 8.7% of flights, about 1 in 11, arrived an hour or more late. When a flight was late (15+ minutes), the average arrival delay was 64 min.
  • Overall, 73.5% of flights on this route arrived on time, 2.1 points lower than the U.S. average of 75.6%.
  • Over the last 3 years, November was the most reliable month on this route (87.4% on time) and May the least reliable (65.0%).
  • Cancellations peaked in January, when 4.6% of flights were cancelled.
  • Flights scheduled to depart before 6 am were the most punctual (95.4% on time); flights scheduled to depart 6 pm to 7 pm were the least (45.1%).
  • In the other direction, Denver (DEN) to Nashville (BNA), 74.4% of flights were on time and 0.5% were cancelled. Compare airlines DEN to BNA.

Best and worst months to fly BNA to DEN

Jan 77.2%
Feb 80.0%
Mar 81.9%
Apr 78.2%
May 65.0%
Jun 67.5%
Jul 69.9%
Aug 72.0%
Sep 83.0%
Oct 85.0%
Nov 87.4%
Dec 85.0%
Share of scheduled flights on time 12-month average 73.5%
All airlines combined, by calendar month, September 2023 to August 2026 (3 years pooled). Scale starts at zero.
Show as table
PeriodOn timeFlights
January 77.2% 847
February 80.0% 784
March 81.9% 978
April 78.2% 940
May 65.0% 995
June 67.5% 1,044
July 69.9% 1,088
August 72.0% 983
September 83.0% 988
October 85.0% 1,047
November 87.4% 979
December 85.0% 957
Best and worst calendar month by airline, September 2023 to August 2026.
AirlineBest monthWorst month
Frontier Airlines December (85.7%) May (65.4%)
United Airlines November (92.0%) May (68.2%)
Southwest Airlines November (85.6%) May (63.2%)

Month by month, last 12 months

Sep 83.2%
Oct 77.8%
Nov 85.8%
Dec 76.3%
Jan 76.3%
Feb 77.1%
Mar 77.2%
Apr 76.4%
May 67.2%
Jun 58.4%
Jul 67.3%
Aug 63.9%
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 83.2% 315
Oct 2025 77.8% 325
Nov 2025 85.8% 289
Dec 2025 76.3% 279
Jan 2026 76.3% 257
Feb 2026 77.1% 253
Mar 2026 77.2% 307
Apr 2026 76.4% 284
May 2026 67.2% 314
Jun 2026 58.4% 341
Jul 2026 67.3% 352
Aug 2026 63.9% 316

Best and worst departure times

<6a 95.4%
6a 90.9%
7a 87.9%
8a 82.9%
9a 87.5%
10a 91.1%
11a 74.6%
12p 83.3%
1p 52.0%
2p 73.9%
3p 70.1%
4p 52.6%
5p 55.3%
6p 45.1%
7p 62.0%
8p 71.4%
9p 71.3%
10p 67.6%
Share of scheduled flights on time
By scheduled local departure hour at BNA, 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 95.4% 282
Departing 6 am to 7 am 90.9% 99
Departing 7 am to 8 am 87.9% 363
Departing 8 am to 9 am 82.9% 292
Departing 9 am to 10 am 87.5% 56
Departing 10 am to 11 am 91.1% 271
Departing 11 am to noon 74.6% 118
Departing noon to 1 pm 83.3% 186
Departing 1 pm to 2 pm 52.0% 152
Departing 2 pm to 3 pm 73.9% 460
Departing 3 pm to 4 pm 70.1% 107
Departing 4 pm to 5 pm 52.6% 211
Departing 5 pm to 6 pm 55.3% 394
Departing 6 pm to 7 pm 45.1% 204
Departing 7 pm to 8 pm 62.0% 142
Departing 8 pm to 9 pm 71.4% 140
Departing 9 pm to 10 pm 71.3% 87
Departing 10 pm to 11 pm 67.6% 68
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 Nashville, TN (BNA) to Denver, CO (DEN), 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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