ON TIMEBOARD
BNA Nashville / SAN San Diego

BNA → SAN on time

Nashville (Nashville, TN) to San Diego (San Diego, CA). Every scheduled flight, September 2025 to August 2026.

On time
72%
arrived < 15 min late
Cancelled
0.8%
1,092 flights
Typical arrival
−2 min
median vs schedule
When late
+44 min
average delay
Flights / day
3
1 airline

72% of flights from Nashville to San Diego arrived on time over the past 12 months. That is worse than the typical U.S. route. The 7 a.m. departures ran on time 91% of the time; the 8 p.m. ones 64%. 7% of flights arrived more than an hour late or not at all.

How late?

The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for BNA → SAN: when a flight was late, it was under 45 minutes late 65% of the time. About 1 in 17 flights landed an hour or more late; 0.8% were cancelled outright.

Share of all 1,092 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
Southwest Airlines1,09272%0.8%−2 min6.0%+44 minSouthwest Airlines

Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.

Best time of day to fly

On-time rate by scheduled departure hour (local time at BNA). Delays build through the day as late planes knock on, so early flights usually do best.

40%70%100%6 a.m. departures: 89% on time (108 flights)896a7 a.m. departures: 91% on time (104 flights)917a8 a.m. departures: 81% on time (139 flights)818a9 a.m. departures: too few flights (4 flights)9a10 a.m. departures: too few flights10a11 a.m. departures: too few flights (80 flights)11anoon departures: too few flights (67 flights)12p1 p.m. departures: too few flights (81 flights)1p2 p.m. departures: too few flights (31 flights)2p3 p.m. departures: too few flights (44 flights)3p4 p.m. departures: too few flights (57 flights)4p5 p.m. departures: too few flights (38 flights)5p6 p.m. departures: too few flights (70 flights)6p7 p.m. departures: too few flights (61 flights)7p8 p.m. departures: 64% on time (185 flights)648p9 p.m. departures: too few flights (21 flights)9p
BNA → SAN, share of flights arriving on time, by departure hour. Hours with under 100 flights are greyed out.
82%+ on time76–82%68–76%under 68%too few flights

Last flight of the day

On BNA → SAN, each airline's last flight of the day was cancelled 0.8% of the time, against 0.8% for its earlier flights, about the same. It arrived 3+ hours late 0.3% of the time (earlier flights: 0.1%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.

AirlineLast departureLast: cancelledLast: 3h+ lateEarlier: cancelledNext morning
Southwest Airlines8:20 p.m.0.8%0.3%0.8%first flight 8:05 a.m.

Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.

By month

Each calendar month pooled over 2023–2026. Best: March (83%). Worst: June (63%).

40%70%100%Jan: 80% on time (196 flights)80JanFeb: 80% on time (179 flights)80FebMar: 83% on time (240 flights)83MarApr: 69% on time (224 flights)69AprMay: 70% on time (225 flights)70MayJun: 63% on time (263 flights)63JunJul: 68% on time (277 flights)68JulAug: 73% on time (271 flights)73AugSep: 79% on time (216 flights)79SepOct: 78% on time (257 flights)78OctNov: 78% on time (231 flights)78NovDec: 76% on time (244 flights)76Dec

By day of week

DayFlightsOn timeCancelled
Monday17370%1.2%
Tuesday15180%0.0%
Wednesday15077%0.0%
Thursday16861%0.0%
Friday17071%0.6%
Saturday12279%1.6%
Sunday15867%2.5%

Why flights were late

Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.

Late inbound plane 45%Airline (crew, maintenance, ops) 31%Air traffic & airport (NAS) 22%Severe weather 1%

Cancellations: weather 7 · airline 2

Month by month

50%75%100%Sep 2023Jan 2024Jan 2025Jan 2026Mar 2026: 82% on time, 0.0% cancelledApr 2026: 65% on time, 0.0% cancelledMay 2026: 71% on time, 1.0% cancelledJul 2026: 65% on time, 0.0% cancelledAug 2026: 63% on time, 0.9% cancelled
Share of flights on time, by month (hover a point for cancellations)
BNA → SAN, monthly on-time and cancellation rate.

Worst days in the past year

DateFlightsOn timeCancelled
Apr 29, 202630%0
Oct 27, 202530%0
Feb 20, 202630%0
Dec 29, 202530%0
Jun 25, 202630%0

Questions

How often are flights from BNA to SAN on time?

72% of 1,092 scheduled flights from Nashville, TN to San Diego, CA arrived within 15 minutes of schedule between September 2025 and August 2026. 0.8% were cancelled.

What is the best time of day to fly BNA to SAN?

Flights scheduled to leave at 7 a.m. were the most reliable (91% on time). The 8 p.m. departures were the least (64%).

What month has the most delays from BNA to SAN?

June (63% on time). The best month is March (83%), over 2023–2026.

Is the last flight of the day from BNA to SAN more likely to be cancelled?

Not much. Each airline's last BNA–SAN flight of the day was cancelled 0.8% of the time over the past year, against 0.8% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.

Related

Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.