ATIS Alerts Smart Flight Search
Find the flight least likely to be delayed
BetaWe rank real flight numbers by how often they flew and arrived on time over the last 12 months, adjusted for your travel month and departure time, then check nearby airports and calmer connections. US airlines and airports.
IAD → BNA
Dulles to Nashville: 1,039 nonstop flights a year
On time (12 months)
83%
Cancelled
0.7%
avg delay 13 min
Best time to leave
Before 9 AM
93% on time vs 74% 3 to 6 PM
Most reliable airline
Republic
85% chance on time
Lowest nonstop fare seen in the next two months: $160 (United 213 on 2026-11-09). 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 · United 1366
8:15 AM → 9:27 AM2h 02m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 91% of the time (96 flights, Jun 2025 to May 2026).
- Never cancelled in 96 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 3 to 6 PM: 74%).
- Departs outside IAD's trouble window (1 PM to 7 PM, when 75% of its 63 ground stops and delay programs started).
Moderate track record · 96 flights
Find United 1366 fares Opens this date on Aviasales#2 · United 213
12:45 PM → 1:46 PM2h 01m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 1858; its record covers all of them.
83%
chance on time
- On time (history)
- 84%
- Cancelled
- 1.3%
- Avg arrival delay
- 12 min
- Arrived on time 84% of the time (234 flights, Jun 2025 to May 2026).
- Departs outside IAD's trouble window (1 PM to 7 PM, when 75% of its 63 ground stops and delay programs started).
- Lands inside BNA's trouble window: 64% of its 44 ground stops and delay programs started between 1 PM and 7 PM.
Strong track record · 234 flights
Find United 213 fares Opens this date on Aviasales#3 · United 2264
5:47 PM → 6:56 PM2h 09m nonstop
Local times, typical schedule. Last flown 2026-05-31.
76%
chance on time
- On time (history)
- 77%
- Cancelled
- 0.9%
- Avg arrival delay
- 20 min
- Arrived on time 77% of the time (221 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 74% on time; Before 9 AM: 93%).
- Departs inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.
- Lands inside BNA's trouble window: 64% of its 44 ground stops and delay programs started between 1 PM and 7 PM.
Strong track record · 221 flights
Find United 2264 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Republic Airways (sold as American Eagle, Delta Connection or United Express)85%
38 flights · 89% on time as flown · 0.5% cancel
- United Airlines82%
960 flights · 83% on time as flown · 0.7% cancel
- Allegiant Air80%
40 flights · 75% on time as flown · 0.5% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM93%
275 flights · avg delay 4 min
- 9 AM to noon86%
42 flights · avg delay 15 min
- Noon to 3 PM85%
338 flights · avg delay 12 min
- 3 to 6 PM74%
369 flights · avg delay 21 min
Best day: Saturday (84%). Worst: Sunday (77%).
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