Route on-time record
BNA to GSP: most on-time flights and the best time to fly
Nashville (Nashville International Airport) to Greenville/Greer/Spartanburg (Greenville-Spartanburg International Airport). 547 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 0.9% were cancelled. The most reliable flight number was Southwest 643 at 9:45 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BNA → GSP
Nashville to Greenville/Greer/Spartanburg: 547 nonstop flights a year
On time (12 months)
74%
Cancelled
0.9%
avg delay 16 min
Best time to leave
9 AM to noon
92% on time vs 51% 6 to 9 PM
Most reliable airline
Southwest
74% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Southwest 643
9:45 AM → 12:00 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3815; its record covers all of them.
91%
chance on time
- On time (history)
- 97%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 97% of the time (68 flights, Jun 2025 to May 2026).
- Never cancelled in 68 scheduled flights.
- Leaves in this route's most on-time window (9 AM to noon: 92% on time; 6 to 9 PM: 51%).
- Departs outside BNA's trouble window (1 PM to 7 PM, when 64% of its 44 ground stops and delay programs started).
Moderate track record · 68 flights
Find Southwest 643 fares Opens this date on Aviasales#2 · Southwest 1861
9:35 AM → 11:45 AM1h 10m nonstop
Local times, typical schedule. Last flown 2026-04-06.
80%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 75% of the time (20 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (9 AM to noon: 92% on time; 6 to 9 PM: 51%).
- Departs outside BNA's trouble window (1 PM to 7 PM, when 64% of its 44 ground stops and delay programs started).
- Short track record (20 flights), so its score leans on the airline's record at this hour.
Limited track record · 20 flights
Find Southwest 1861 fares Opens this date on Aviasales#3 · Southwest 3741
4:20 PM → 6:30 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31.
75%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 75% of the time (8 flights, Jun 2025 to May 2026).
- Departs inside BNA's trouble window: 64% of its 44 ground stops and delay programs started between 1 PM and 7 PM.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 3741 fares Opens this date on Aviasales#4 · Southwest 1671
3:40 PM → 5:50 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-05-30. Same departure also flew as Southwest 540; its record covers all of them.
74%
chance on time
- On time (history)
- 73%
- Cancelled
- 0.0%
- Avg arrival delay
- 13 min
- Arrived on time 73% of the time (80 flights, Jun 2025 to May 2026).
- Never cancelled in 80 scheduled flights.
- Departs inside BNA's trouble window: 64% of its 44 ground stops and delay programs started between 1 PM and 7 PM.
- 66% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 80 flights
Find Southwest 1671 fares Opens this date on Aviasales#5 · Southwest 4669
7:30 PM → 9:40 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-05-27.
63%
chance on time
- On time (history)
- 44%
- Cancelled
- 0.0%
- Avg arrival delay
- 42 min
- Arrived on time 44% of the time (16 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 51% on time; 9 AM to noon: 92%).
- Departs outside BNA's trouble window (1 PM to 7 PM, when 64% of its 44 ground stops and delay programs started).
- 94% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 16 flights
Find Southwest 4669 fares Opens this date on Aviasales#6 · Southwest 4061
8:35 PM → 10:45 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-04-06.
62%
chance on time
- On time (history)
- 56%
- Cancelled
- 0.0%
- Avg arrival delay
- 29 min
- Arrived on time 56% of the time (27 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 51% on time; 9 AM to noon: 92%).
- Departs outside BNA's trouble window (1 PM to 7 PM, when 64% of its 44 ground stops and delay programs started).
- 70% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 27 flights
Find Southwest 4061 fares Opens this date on Aviasales#7 · Southwest 3048
8:05 PM → 10:15 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-05-30.
59%
chance on time
- On time (history)
- 48%
- Cancelled
- 0.0%
- Avg arrival delay
- 36 min
- Arrived on time 48% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 51% on time; 9 AM to noon: 92%).
- Departs outside BNA's trouble window (1 PM to 7 PM, when 64% of its 44 ground stops and delay programs started).
Limited track record · 31 flights
Find Southwest 3048 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines74%
547 flights · 74% on time as flown · 0.9% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- 9 AM to noon92%
124 flights · avg delay 3 min
- Noon to 3 PM87%
57 flights · avg delay 7 min
- 3 to 6 PM72%
277 flights · avg delay 18 min
- 6 to 9 PM51%
77 flights · avg delay 34 min
Best day: Saturday (89%). Worst: Sunday (66%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft73%
- Airline (crew, maintenance, boarding)24%
- Air traffic control and airport volume2%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
BNA to GSP questions
- What time of day is best to fly BNA to GSP?
- 9 AM to noon: 92% of flights arrived on time, against 51% for departures 6 to 9 PM.
- Which airline is most on time from BNA to GSP?
- Southwest, with a season-adjusted 74% chance of operating and arriving on time over 547 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on BNA to GSP?
- July (57% on time); the best was February (89%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from BNA
- GSP to BNA (return)
- BNA to ORD 70%
- BNA to DCA 74%
- BNA to ATL 84%
- BNA to LGA 72%
- BNA to DEN 76%
- BNA to CLT 78%
- BNA to DFW 74%
- BNA to MCO 75%
- BNA to AUS 82%
- BNA to BOS 69%
- BNA to PHL 74%
- BNA to TPA 75%
Live status: FAA delays and ground stops