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 → MCO
Dulles to Orlando: 2,204 nonstop flights a year
On time (12 months)
81%
Cancelled
0.8%
avg delay 16 min
Best time to leave
9 AM to noon
90% on time vs 72% 3 to 6 PM
Most reliable airline
United
82% chance on time
Lowest nonstop fare seen in the next two months: $101 (Frontier 2859 on 2026-11-20). 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 1926
9:50 AM → 12:21 PM2h 31m nonstop
Local times, typical schedule. Last flown 2026-05-20.
90%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.3%
- Avg arrival delay
- 7 min
- Arrived on time 91% of the time (298 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (9 AM to noon: 90% on time; 3 to 6 PM: 72%).
- Departs outside IAD's trouble window (1 PM to 7 PM, when 75% of its 63 ground stops and delay programs started).
Strong track record · 298 flights
Find United 1926 fares Opens this date on Aviasales#2 · United 379
8:30 AM → 11:00 AM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
- On time (history)
- 89%
- Cancelled
- 1.2%
- Avg arrival delay
- 7 min
- Arrived on time 89% of the time (322 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).
Strong track record · 322 flights
Find United 379 fares Opens this date on Aviasales#3 · United 2206
12:47 PM → 3:14 PM2h 27m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.3%
- Avg arrival delay
- 12 min
- Arrived on time 85% of the time (336 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 MCO's trouble window: 76% of its 89 ground stops and delay programs started between 1 PM and 7 PM.
Strong track record · 336 flights
Find United 2206 fares Opens this date on Aviasales#4 · United 1277
4:10 PM → 6:42 PM2h 32m nonstop
Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as United 1786; its record covers all of them.
83%
chance on time
- On time (history)
- 87%
- Cancelled
- 0.0%
- Avg arrival delay
- 15 min
- Arrived on time 87% of the time (77 flights, Jun 2025 to May 2026).
- Never cancelled in 77 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 72% on time; 9 AM to noon: 90%).
- Departs inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.
Moderate track record · 77 flights
Find United 1277 fares Opens this date on Aviasales#5 · United 689
10:22 PM → 12:45 AM2h 26m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
- On time (history)
- 81%
- Cancelled
- 0.6%
- Avg arrival delay
- 12 min
- Arrived on time 81% of the time (348 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).
Strong track record · 348 flights
Find United 689 fares Opens this date on Aviasales#6 · Frontier 4229
8:12 AM → 10:46 AM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-04. Same departure also flew as Frontier 2859; its record covers all of them.
76%
chance on time
- On time (history)
- 79%
- Cancelled
- 3.4%
- Avg arrival delay
- 9 min
- Arrived on time 79% of the time (114 flights, Jun 2025 to May 2026).
- Cancelled 3.4% of the time (4 of 118).
- 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 · 114 flights
Find Frontier 4229 fares Opens this date on Aviasales#7 · United 1101
3:37 PM → 5:59 PM2h 22m nonstop
Local times, typical schedule. Last flown 2026-05-31.
75%
chance on time
- On time (history)
- 78%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 78% of the time (32 flights, Jun 2025 to May 2026).
- Never cancelled in 32 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 72% on time; 9 AM to noon: 90%).
- Departs inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.
Limited track record · 32 flights
Find United 1101 fares Opens this date on Aviasales#8 · Frontier 4355
7:27 PM → 10:09 PM2h 42m nonstop
Local times, typical schedule. Last flown 2026-05-31.
73%
chance on time
- On time (history)
- 81%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 81% of the time (32 flights, Jun 2025 to May 2026).
- Never cancelled in 32 scheduled flights.
- Departs outside IAD's trouble window (1 PM to 7 PM, when 75% of its 63 ground stops and delay programs started).
- Short track record (32 flights), so its score leans on the airline's record at this hour.
Limited track record · 32 flights
Find Frontier 4355 fares Opens this date on Aviasales#9 · United 2463
5:50 PM → 8:22 PM2h 32m nonstop
Local times, typical schedule. Last flown 2026-05-31.
70%
chance on time
- On time (history)
- 70%
- Cancelled
- 0.5%
- Avg arrival delay
- 25 min
- Arrived on time 70% of the time (362 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 72% on time; 9 AM to noon: 90%).
- Departs inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.
Strong track record · 362 flights
Find United 2463 fares Opens this date on Aviasales#10 · Frontier 4811
8:30 PM → 11:07 PM2h 37m nonstop
Local times, typical schedule. Last flown 2026-04-13.
63%
chance on time
- On time (history)
- 61%
- Cancelled
- 2.5%
- Avg arrival delay
- 55 min
- Arrived on time 61% of the time (119 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).
Moderate track record · 119 flights
Find Frontier 4811 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines82%
1,932 flights · 82% on time as flown · 0.6% cancel
- Frontier Airlines71%
272 flights · 71% on time as flown · 1.9% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM87%
366 flights · avg delay 8 min
- 9 AM to noon90%
383 flights · avg delay 8 min
- Noon to 3 PM81%
432 flights · avg delay 17 min
- 3 to 6 PM72%
495 flights · avg delay 24 min
- 6 to 9 PM76%
138 flights · avg delay 17 min
- After 9 PM79%
390 flights · avg delay 18 min
Best day: Tuesday (82%). Worst: Sunday (74%).
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