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.
MCO → ISP
Orlando to Islip: 1,425 nonstop flights a year
On time (12 months)
74%
Cancelled
1.7%
avg delay 16 min
Best time to leave
Before 9 AM
91% on time vs 55% 6 to 9 PM
Most reliable airline
JetBlue
86% 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 · JetBlue 546
3:05 PM → 5:44 PM2h 39m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
- On time (history)
- 89%
- Cancelled
- 1.4%
- Avg arrival delay
- 7 min
- Arrived on time 89% of the time (358 flights, Jun 2025 to May 2026).
- Departs inside MCO's trouble window: 76% of its 89 ground stops and delay programs started between 1 PM and 7 PM.
Strong track record · 358 flights
Find JetBlue 546 fares Opens this date on Aviasales#2 · Frontier 3942
7:23 AM → 10:05 AM2h 42m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
- On time (history)
- 85%
- Cancelled
- 1.0%
- Avg arrival delay
- 12 min
- Arrived on time 85% of the time (189 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 55%).
- Departs outside MCO's trouble window (1 PM to 7 PM, when 76% of its 89 ground stops and delay programs started).
Moderate track record · 189 flights
Find Frontier 3942 fares Opens this date on Aviasales#3 · Southwest 2874
9:30 AM → 12:05 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
74%
chance on time
- On time (history)
- 76%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 76% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Departs outside MCO's trouble window (1 PM to 7 PM, when 76% of its 89 ground stops and delay programs started).
- Short track record (54 flights), so its score leans on the airline's record at this hour.
Limited track record · 54 flights
Find Southwest 2874 fares Opens this date on Aviasales#4 · Frontier 4532
10:04 AM → 12:47 PM2h 43m nonstop
Local times, typical schedule. Last flown 2026-04-13.
65%
chance on time
- On time (history)
- 63%
- Cancelled
- 4.5%
- Avg arrival delay
- 35 min
- Arrived on time 63% of the time (148 flights, Jun 2025 to May 2026).
- Cancelled 4.5% of the time (7 of 156).
- Departs outside MCO's trouble window (1 PM to 7 PM, when 76% of its 89 ground stops and delay programs started).
- 51% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 148 flights
Find Frontier 4532 fares Opens this date on Aviasales#5 · Southwest 2796
7:50 PM → 10:30 PM2h 40m nonstop
Local times, typical schedule. Last flown 2026-05-31.
62%
chance on time
- On time (history)
- 71%
- Cancelled
- 0.0%
- Avg arrival delay
- 15 min
- Arrived on time 71% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 55% on time; Before 9 AM: 91%).
- Departs outside MCO's trouble window (1 PM to 7 PM, when 76% of its 89 ground stops and delay programs started).
Limited track record · 55 flights
Find Southwest 2796 fares Opens this date on Aviasales#6 · Southwest 1062
1:50 PM → 4:30 PM2h 40m nonstop
Local times, typical schedule. Last flown 2026-04-06.
61%
chance on time
- On time (history)
- 56%
- Cancelled
- 3.6%
- Avg arrival delay
- 18 min
- Arrived on time 56% of the time (27 flights, Jun 2025 to May 2026).
- Departs inside MCO's trouble window: 76% of its 89 ground stops and delay programs started between 1 PM and 7 PM.
- Short track record (27 flights), so its score leans on the airline's record at this hour.
Limited track record · 27 flights
Find Southwest 1062 fares Opens this date on Aviasales#7 · Southwest 3856
8:00 PM → 10:40 PM2h 40m nonstop
Local times, typical schedule. Last flown 2026-04-06.
52%
chance on time
- On time (history)
- 50%
- Cancelled
- 3.0%
- Avg arrival delay
- 34 min
- Arrived on time 50% of the time (32 flights, Jun 2025 to May 2026).
- Cancelled 3.0% of the time (1 of 33).
- Leaves in this route's least on-time window (6 to 9 PM: 55% on time; Before 9 AM: 91%).
- Departs outside MCO's trouble window (1 PM to 7 PM, when 76% of its 89 ground stops and delay programs started).
Limited track record · 32 flights
Find Southwest 3856 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- JetBlue86%
369 flights · 89% on time as flown · 1.5% cancel
- Frontier Airlines74%
372 flights · 75% on time as flown · 2.2% cancel
- Southwest Airlines66%
684 flights · 66% on time as flown · 1.5% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM91%
476 flights · avg delay 5 min
- 9 AM to noon77%
257 flights · avg delay 10 min
- Noon to 3 PM74%
193 flights · avg delay 14 min
- 3 to 6 PM65%
166 flights · avg delay 33 min
- 6 to 9 PM55%
305 flights · avg delay 26 min
Best day: Tuesday (87%). Worst: Sunday (71%).
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