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Route on-time record

ORD to RSW: most on-time flights and the best time to fly

Chicago (Chicago O'Hare International Airport) to Fort Myers (Southwest Florida International Airport). 3,242 nonstop flights in Jun 2025 to May 2026, 76% arrived within 15 minutes and 1.6% were cancelled. The most reliable flight number was United 1740 at 7:05 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

ORD → RSW

Chicago to Fort Myers: 3,242 nonstop flights a year

On time (12 months)

76%

Cancelled

1.6%

avg delay 18 min

Best time to leave

Before 9 AM

86% on time vs 52% 6 to 9 PM

Most reliable airline

United

81% chance on time

Check ORD to RSW fares

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. #1 · United 1740

    7:05 AM → 11:16 AM3h 11m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    91%

    chance on time

    On time (history)
    92%
    Cancelled
    0.3%
    Avg arrival delay
    4 min
    • Arrived on time 92% of the time (363 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 86% on time; 6 to 9 PM: 52%).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).

    Strong track record · 363 flights

    Find United 1740 fares Opens this date on Aviasales

  2. #2 · United 1254

    6:10 AM → 10:10 AM3h 00m nonstop

    Local times, typical schedule. Last flown 2026-03-28.

    89%

    chance on time

    On time (history)
    94%
    Cancelled
    0.0%
    Avg arrival delay
    3 min
    • Arrived on time 94% of the time (18 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 86% on time; 6 to 9 PM: 52%).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
    • Short track record (18 flights), so its score leans on the airline's record at this hour.

    Limited track record · 18 flights

    Find United 1254 fares Opens this date on Aviasales

  3. #3 · United 2357

    10:35 AM → 2:44 PM3h 09m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 1857; its record covers all of them.

    86%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    14 min
    • Arrived on time 88% of the time (64 flights, Jun 2025 to May 2026).
    • Never cancelled in 64 scheduled flights.
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).

    Moderate track record · 64 flights

    Find United 2357 fares Opens this date on Aviasales

  4. #4 · American 2433

    6:48 AM → 10:41 AM2h 53m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as American 2693, 868; its record covers all of them.

    85%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 88% of the time (85 flights, Jun 2025 to May 2026).
    • Never cancelled in 85 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 86% on time; 6 to 9 PM: 52%).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).

    Moderate track record · 85 flights

    Find American 2433 fares Opens this date on Aviasales

  5. #5 · United 1036

    9:05 AM → 1:16 PM3h 11m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    82%

    chance on time

    On time (history)
    82%
    Cancelled
    0.4%
    Avg arrival delay
    9 min
    • Arrived on time 82% of the time (237 flights, Jun 2025 to May 2026).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).

    Strong track record · 237 flights

    Find United 1036 fares Opens this date on Aviasales

  6. #6 · Frontier 3800

    7:10 AM → 11:22 AM3h 12m nonstop

    Local times, typical schedule. Last flown 2026-05-16.

    82%

    chance on time

    On time (history)
    77%
    Cancelled
    2.8%
    Avg arrival delay
    18 min
    • Arrived on time 77% of the time (35 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 86% on time; 6 to 9 PM: 52%).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
    • Short track record (35 flights), so its score leans on the airline's record at this hour.

    Limited track record · 35 flights

    Find Frontier 3800 fares Opens this date on Aviasales

  7. #7 · United 1807

    12:45 PM → 4:51 PM3h 06m nonstop

    Local times, typical schedule. Last flown 2026-04-29. Same departure also flew as United 623; its record covers all of them.

    81%

    chance on time

    On time (history)
    80%
    Cancelled
    1.8%
    Avg arrival delay
    16 min
    • Arrived on time 80% of the time (54 flights, Jun 2025 to May 2026).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 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 United 1807 fares Opens this date on Aviasales

  8. #8 · Southwest 3690

    10:30 AM → 2:25 PM2h 55m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 4153; its record covers all of them.

    81%

    chance on time

    On time (history)
    81%
    Cancelled
    2.8%
    Avg arrival delay
    10 min
    • Arrived on time 81% of the time (70 flights, Jun 2025 to May 2026).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).

    Moderate track record · 70 flights

    Find Southwest 3690 fares Opens this date on Aviasales

  9. #9 · United 441

    10:42 AM → 2:49 PM3h 07m nonstop

    Local times, typical schedule. Last flown 2026-03-28.

    77%

    chance on time

    On time (history)
    54%
    Cancelled
    0.0%
    Avg arrival delay
    38 min
    • Arrived on time 54% of the time (24 flights, Jun 2025 to May 2026).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
    • Short track record (24 flights), so its score leans on the airline's record at this hour.

    Limited track record · 24 flights

    Find United 441 fares Opens this date on Aviasales

  10. #10 · United 350

    1:55 PM → 6:01 PM3h 06m nonstop

    Local times, typical schedule. Last flown 2026-04-27.

    75%

    chance on time

    On time (history)
    65%
    Cancelled
    0.0%
    Avg arrival delay
    16 min
    • Arrived on time 65% of the time (20 flights, Jun 2025 to May 2026).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 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 United 350 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines81%

    1,615 flights · 81% on time as flown · 0.6% cancel

  • Southwest Airlines76%

    102 flights · 78% on time as flown · 2.1% cancel

  • Frontier Airlines76%

    36 flights · 77% on time as flown · 1.8% cancel

  • American Airlines72%

    1,094 flights · 72% on time as flown · 1.7% cancel

  • Spirit Airlines62%

    395 flights · 62% on time as flown · 4.1% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • Before 9 AM86%

    991 flights · avg delay 10 min

  • 9 AM to noon78%

    898 flights · avg delay 14 min

  • Noon to 3 PM75%

    470 flights · avg delay 19 min

  • 3 to 6 PM69%

    539 flights · avg delay 25 min

  • 6 to 9 PM52%

    341 flights · avg delay 36 min

Best day: Tuesday (83%). Worst: Sunday (76%).

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.

J
74
F
83
M
72
A
79
M
82
J
78
J
73
A
79
S
88
O
88
N
85
D
75

What delays this route

  • Late-arriving aircraft42%
  • Air traffic control and airport volume29%
  • Airline (crew, maintenance, boarding)24%
  • Severe weather6%

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

ORD to RSW questions

What time of day is best to fly ORD to RSW?
Before 9 AM: 86% of flights arrived on time, against 52% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from ORD to RSW?
United, with a season-adjusted 81% chance of operating and arriving on time over 1,615 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 ORD to RSW?
March (72% on time); the best was October (88%), 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 ORD

Live status: FAA delays and ground stops