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.
ISP → MCO
Islip to Orlando: 1,426 nonstop flights a year
On time (12 months)
72%
Cancelled
1.8%
avg delay 23 min
Best time to leave
Before 9 AM
90% on time vs 47% 6 to 9 PM
Most reliable airline
JetBlue
72% chance on time
Lowest nonstop fare seen in the next two months: $188 (Frontier 2149 on 2026-11-30). 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 2498
6:50 AM → 9:30 AM2h 40m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
- On time (history)
- 87%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 87% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 6 to 9 PM: 47%).
- Short track record (55 flights), so its score leans on the airline's record at this hour.
Limited track record · 55 flights
Find Southwest 2498 fares Opens this date on Aviasales#2 · Southwest 417
6:10 AM → 9:00 AM2h 50m nonstop
Local times, typical schedule. Last flown 2026-04-04.
85%
chance on time
- On time (history)
- 92%
- Cancelled
- 0.0%
- Avg arrival delay
- 21 min
- Arrived on time 92% of the time (13 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 6 to 9 PM: 47%).
- Short track record (13 flights), so its score leans on the airline's record at this hour.
Limited track record · 13 flights
Find Southwest 417 fares Opens this date on Aviasales#3 · Southwest 864
10:00 AM → 12:45 PM2h 45m nonstop
Local times, typical schedule. Last flown 2026-05-30.
78%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 864 fares Opens this date on Aviasales#4 · Frontier 2149
4:07 PM → 7:07 PM2h 54m nonstop
Local times, typical schedule. Last flown 2026-05-26.
75%
chance on time
- On time (history)
- 84%
- Cancelled
- 2.2%
- Avg arrival delay
- 19 min
- Arrived on time 84% of the time (45 flights, Jun 2025 to May 2026).
- Short track record (45 flights), so its score leans on the airline's record at this hour.
Limited track record · 45 flights
Find Frontier 2149 fares Opens this date on Aviasales#5 · Frontier 3941
11:00 AM → 1:54 PM2h 57m nonstop
Local times, typical schedule. Last flown 2026-05-31.
74%
chance on time
- On time (history)
- 77%
- Cancelled
- 1.6%
- Avg arrival delay
- 22 min
- Arrived on time 77% of the time (185 flights, Jun 2025 to May 2026).
- Lands inside MCO's trouble window: 76% of its 89 ground stops and delay programs started between 1 PM and 7 PM.
Moderate track record · 185 flights
Find Frontier 3941 fares Opens this date on Aviasales#6 · Southwest 2202
12:15 PM → 3:05 PM2h 50m nonstop
Local times, typical schedule. Last flown 2026-04-06.
72%
chance on time
- On time (history)
- 76%
- Cancelled
- 15.0%
- Avg arrival delay
- 16 min
- Arrived on time 76% of the time (17 flights, Jun 2025 to May 2026).
- Lands inside MCO's trouble window: 76% of its 89 ground stops and delay programs started between 1 PM and 7 PM.
- Short track record (17 flights), so its score leans on the airline's record at this hour.
Limited track record · 17 flights
Find Southwest 2202 fares Opens this date on Aviasales#7 · JetBlue 547
6:40 PM → 12:40 PM2h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31.
71%
chance on time
- On time (history)
- 74%
- Cancelled
- 1.4%
- Avg arrival delay
- 24 min
- Arrived on time 74% of the time (358 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 47% on time; Before 9 AM: 90%).
Strong track record · 358 flights
Find JetBlue 547 fares Opens this date on Aviasales#8 · Frontier 3055
3:55 PM → 6:51 PM3h 00m nonstop
Local times, typical schedule. Last flown 2026-04-13.
55%
chance on time
- On time (history)
- 30%
- Cancelled
- 0.0%
- Avg arrival delay
- 58 min
- Arrived on time 30% of the time (10 flights, Jun 2025 to May 2026).
- Lands inside MCO's trouble window: 76% of its 89 ground stops and delay programs started between 1 PM and 7 PM.
- 75% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (10 flights), so its score leans on the airline's record at this hour.
Limited track record · 10 flights
Find Frontier 3055 fares Opens this date on Aviasales#9 · Southwest 2080
5:10 PM → 7:55 PM2h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3445; its record covers all of them.
55%
chance on time
- On time (history)
- 52%
- Cancelled
- 1.1%
- Avg arrival delay
- 26 min
- Arrived on time 52% of the time (86 flights, Jun 2025 to May 2026).
- 50% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 86 flights
Find Southwest 2080 fares Opens this date on Aviasales#10 · Frontier 1237
1:42 PM → 4:51 PM3h 04m nonstop
Local times, typical schedule. Last flown 2026-04-11.
54%
chance on time
- On time (history)
- 52%
- Cancelled
- 5.5%
- Avg arrival delay
- 49 min
- Arrived on time 52% of the time (118 flights, Jun 2025 to May 2026).
- Cancelled 5.5% of the time (7 of 127).
- Lands inside MCO's trouble window: 76% of its 89 ground stops and delay programs started between 1 PM and 7 PM.
- 64% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 118 flights
Find Frontier 1237 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- JetBlue72%
369 flights · 74% on time as flown · 1.5% cancel
- Southwest Airlines72%
685 flights · 73% on time as flown · 1.5% cancel
- Frontier Airlines67%
372 flights · 68% on time as flown · 2.6% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM90%
358 flights · avg delay 11 min
- 9 AM to noon83%
288 flights · avg delay 15 min
- Noon to 3 PM67%
181 flights · avg delay 28 min
- 3 to 6 PM62%
359 flights · avg delay 25 min
- 6 to 9 PM47%
224 flights · avg delay 49 min
Best day: Tuesday (78%). Worst: Sunday (70%).
Smarter routing
Nearby airports that run more on time
EWR → MCO 74% chance on time
Newark Liberty International Airport to Orlando International Airport · 6,654 flights a year · 56 mi from your airports · yours: 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