Route profile
BNA→BWI
Flight reliability, delays and best times to fly from Nashville to Baltimore, 587 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 66% of comparable major US routes (4,598 compared)
Calculated from 5,951 flights. How this is calculated · What counts as on time
BNA → BWI arrives on time 80.4% of the time; the return trip, BWI → BNA, arrives on time 78.9% of the time.
BNA → BWI spends 19.6 minutes on the ground on a 587-mile trip: 13.8 minutes from pushback to wheels-up at BNA and 5.8 minutes from touchdown to gate at BWI.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What sets this route apart
Where BNA to BWI differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
BNA to BWI is at its best against routes of similar length for flights scheduled at 2 PM: 87.4% arrive on time, 12.4 points ahead of the 75.0% those routes manage at that hour. Against all other routes the gap is 12.8 points.
BNA to BWI struggles most at 5 PM: 61.1% of its flights scheduled then arrive on time, 9.5 points behind the 70.6% on routes of similar length at the same hour. Against all other routes the gap is 8.7 points.
BNA to BWI holds up on Wednesdays better than routes of similar length do: 87.3% on time to their 81.6%, a 5.7 points lead. Against all other routes the gap is 6.5 points.
January is kinder to BNA to BWI than to routes of similar length: 86.8% on time against 79.4%, 7.4 points better. Against all other routes the gap is 7.7 points.
In June, BNA to BWI runs 4.2 points below routes of similar length, 69.1% on time to 73.3%.
BNA to BWI against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 2 PM departures | 87.4% | routes of similar length | 75.0% | +12.4 pts | 231 here, 101,803 there |
| Hour: 5 PM departures | 61.1% | routes of similar length | 70.6% | −9.5 pts | 314 here, 127,231 there |
| Weekday: Wednesday | 87.3% | routes of similar length | 81.6% | +5.7 pts | 829 here, 272,314 there |
| Month: January | 86.8% | routes of similar length | 79.4% | +7.4 pts | 379 here, 142,984 there |
| Month: June | 69.1% | routes of similar length | 73.3% | −4.2 pts | 476 here, 159,787 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 587 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
Why BNA → BWI flights are cancelled
July 2023 – July 2026
BNA → BWI cancelled 84 of 5,951 scheduled flights — about 1 in every 71. The reason filed most often was extreme weather, 60.7% of the cancellations coded on this route — about 1 in every 117 scheduled flights.
Share of cancellations
Of 84 cancelled departures carrying a reason code.
What each reason means
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
51 cancellations, 60.7% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
26 cancellations, 31.0% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
7 cancellations, 8.3% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. With only one or two carriers on the route, the split mostly reflects how they file. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
84 coded cancellations were recorded on BNA → BWI; the section appears from 50.
When it goes wrong
July 2023 – July 2026
35 min late
against a median of 5 min early
Percentiles over 5,951 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at BWI after arriving from BNA.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 36% | Likely to miss |
| 45 min | 19% | High risk |
| 60 min | 12% | Some risk |
| 90 min | 5.4% | Some risk |
| 120 min | 2.9% | Low risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 1.41% of the time and diverts 0.20% of the time, which a late arrival never shows up in.
Chance of missing is the share of 5,855 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 35 minutes late (90th-percentile gate arrival delay), over 5,951 operations.
Any other layover length: connection checker.
Best time to fly
BNA → BWI flights departing 5–9 AM arrived on time 93.0% of the time, against 68.0% for 6–9 PM departures, a gap of 25.0 percentage points.
By departure window
By departure hour
- 12 AM to 4 AM: too few flights to score
- 5 AM: 95.4% on time from 467 flights
- 6 AM: 90.4% on time from 459 flights
- 7 AM: 94.8% on time from 404 flights
- 8 AM: 90.9% on time from 267 flights
- 9 AM: 92.8% on time from 366 flights
- 10 AM: 88.4% on time from 152 flights
- 11 AM: 87.2% on time from 332 flights
- 12 PM: 83.2% on time from 282 flights
- 1 PM: 75.4% on time from 486 flights
- 2 PM: 87.4% on time from 240 flights
- 3 PM: 79.7% on time from 307 flights
- 4 PM: 70.6% on time from 315 flights
- 5 PM: 61.1% on time from 320 flights
- 6 PM: 71.3% on time from 385 flights
- 7 PM: 70.1% on time from 440 flights
- 8 PM: 61.1% on time from 314 flights
- 9 PM: 68.9% on time from 366 flights
- 10 PM to 11 PM: too few flights to score
Why BNA → BWI runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for BNA → BWI. Only delays of 15 minutes or more are attributed. What the five causes mean
Late-arriving aircraft is the largest cause on BNA → BWI, at 58.6%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 93.0% of the time and 6–9 PM departures 68.0%.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| Southwest Airlines | 5,844 | 80.5% | 1.39% | -5 min | 5.5% |
Other ways to fly Nashville to Washington
Airport pairs in the same two city markets, as the DOT defines them.
| Route | Flights | On time | Cancelled | Median delay | Score |
|---|---|---|---|---|---|
| BNA→DCA Nashville to Washington | 12,843 | 76.7% | 2.79% | -5 min | 54 |
| BNA→BWI this route Nashville to Baltimore | 5,951 | 80.4% | 1.41% | -5 min | 71 |
BNA → BWI is the most reliable pairing for this journey at 80.4% on time, against 76.7% for BNA → DCA.
Weekly and seasonal patterns
By day of week
Wednesday is historically the most reliable day and Sunday the least, a gap of 10.5 percentage points.
By month
- Jan: 86.8%
- Feb: 86.6%
- Mar: 80.8%
- Apr: 82.9%
- May: 74.0%
- Jun: 69.1%
- Jul: 69.2%
- Aug: 83.0%
- Sep: 86.6%
- Oct: 82.2%
- Nov: 86.8%
- Dec: 83.8%
June is historically the weakest month and November the strongest, a spread of 17.7 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 69.6% from 174 flights
- August 2023: 82.6% from 163 flights
- September 2023: 82.2% from 166 flights
- October 2023: 86.1% from 202 flights
- November 2023: 84.1% from 176 flights
- December 2023: 84.9% from 180 flights
- January 2024: 80.7% from 144 flights
- February 2024: 89.5% from 124 flights
- March 2024: 86.8% from 159 flights
- April 2024: 84.3% from 166 flights
- May 2024: 73.5% from 172 flights
- June 2024: 75.6% from 169 flights
- July 2024: 77.2% from 188 flights
- August 2024: 86.5% from 179 flights
- September 2024: 90.2% from 163 flights
- October 2024: 86.2% from 181 flights
- November 2024: 92.5% from 161 flights
- December 2024: 84.6% from 156 flights
- January 2025: 86.3% from 132 flights
- February 2025: 84.6% from 124 flights
- March 2025: 81.8% from 160 flights
- April 2025: 84.7% from 177 flights
- May 2025: 75.4% from 183 flights
- June 2025: 67.5% from 167 flights
- July 2025: 71.5% from 172 flights
- August 2025: 79.9% from 173 flights
- September 2025: 87.3% from 166 flights
- October 2025: 73.2% from 169 flights
- November 2025: 83.8% from 143 flights
- December 2025: 81.4% from 134 flights
- January 2026: 94.2% from 130 flights
- February 2026: 85.6% from 131 flights
- March 2026: 73.3% from 150 flights
- April 2026: 79.4% from 157 flights
- May 2026: 73.0% from 163 flights
- June 2026: 63.4% from 146 flights
- July 2026: 56.1% from 151 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 77.3% against 82.5% in the 12 months before — declining by 5.2 percentage points.
Data and methodology
Calculated by FlyerIntel from 5,951 BNA → BWI flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed