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Route on-time record

MDW to LGA: most on-time flights and the best time to fly

Chicago (Chicago Midway International Airport) to New York (LaGuardia Airport). 2,368 nonstop flights in Jun 2025 to May 2026, 69% arrived within 15 minutes and 3.9% were cancelled. The most reliable flight number was Southwest 2543 at 5:15 AM.

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

MDW → LGA

Chicago to New York: 2,368 nonstop flights a year

On time (12 months)

69%

Cancelled

3.9%

avg delay 20 min

Best time to leave

Before 9 AM

85% on time vs 53% 6 to 9 PM

Most reliable airline

Southwest

66% chance on time

Check MDW to LGA fares

Lowest nonstop fare seen in the next two months: $139 (Southwest 814 on 2026-11-08). 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 · Southwest 2543

    5:15 AM → 8:15 AM2h 00m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3958; its record covers all of them.

    85%

    chance on time

    On time (history)
    91%
    Cancelled
    2.4%
    Avg arrival delay
    3 min
    • Arrived on time 91% of the time (79 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 85% on time; 6 to 9 PM: 53%).
    • Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 ground stops and delay programs started).

    Moderate track record · 79 flights

    Find Southwest 2543 fares Opens this date on Aviasales

  2. #2 · Southwest 1471

    8:15 AM → 11:20 AM2h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3449; its record covers all of them.

    79%

    chance on time

    On time (history)
    85%
    Cancelled
    1.8%
    Avg arrival delay
    7 min
    • Arrived on time 85% of the time (54 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 85% on time; 6 to 9 PM: 53%).
    • Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
    • Short track record (54 flights), so its score leans on the airline's record at this hour.

    Limited track record · 54 flights

    Find Southwest 1471 fares Opens this date on Aviasales

  3. #3 · Southwest 3294

    9:40 AM → 12:45 PM2h 05m nonstop

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

    74%

    chance on time

    On time (history)
    80%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 80% of the time (46 flights, Jun 2025 to May 2026).
    • Never cancelled in 46 scheduled flights.
    • Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
    • Lands inside LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.

    Limited track record · 46 flights

    Find Southwest 3294 fares Opens this date on Aviasales

  4. #4 · Southwest 1423

    7:55 AM → 11:00 AM2h 10m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    71%

    chance on time

    On time (history)
    73%
    Cancelled
    9.1%
    Avg arrival delay
    13 min
    • Arrived on time 73% of the time (30 flights, Jun 2025 to May 2026).
    • Cancelled 9.1% of the time (3 of 33).
    • Leaves in this route's most on-time window (Before 9 AM: 85% on time; 6 to 9 PM: 53%).
    • Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.

    Limited track record · 30 flights

    Find Southwest 1423 fares Opens this date on Aviasales

  5. #5 · Southwest 4289

    10:10 AM → 1:10 PM2h 00m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    71%

    chance on time

    On time (history)
    67%
    Cancelled
    19.2%
    Avg arrival delay
    32 min
    • Arrived on time 67% of the time (21 flights, Jun 2025 to May 2026).
    • Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
    • Lands inside LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.
    • Short track record (21 flights), so its score leans on the airline's record at this hour.

    Limited track record · 21 flights

    Find Southwest 4289 fares Opens this date on Aviasales

  6. #6 · Southwest 3295

    12:45 PM → 3:50 PM2h 05m nonstop

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

    66%

    chance on time

    On time (history)
    65%
    Cancelled
    0.0%
    Avg arrival delay
    20 min
    • Arrived on time 65% of the time (55 flights, Jun 2025 to May 2026).
    • Never cancelled in 55 scheduled flights.
    • Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
    • Lands inside LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.

    Limited track record · 55 flights

    Find Southwest 3295 fares Opens this date on Aviasales

  7. #7 · Southwest 3298

    7:50 PM → 10:55 PM2h 05m nonstop

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

    56%

    chance on time

    On time (history)
    52%
    Cancelled
    6.4%
    Avg arrival delay
    27 min
    • Arrived on time 52% of the time (44 flights, Jun 2025 to May 2026).
    • Cancelled 6.4% of the time (3 of 47).
    • Leaves in this route's least on-time window (6 to 9 PM: 53% on time; Before 9 AM: 85%).
    • Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 ground stops and delay programs started).

    Limited track record · 44 flights

    Find Southwest 3298 fares Opens this date on Aviasales

  8. #8 · Southwest 2705

    5:50 PM → 8:55 PM2h 05m nonstop

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

    55%

    chance on time

    On time (history)
    53%
    Cancelled
    5.6%
    Avg arrival delay
    23 min
    • Arrived on time 53% of the time (51 flights, Jun 2025 to May 2026).
    • Cancelled 5.6% of the time (3 of 54).
    • Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 ground stops and delay programs started).
    • Short track record (51 flights), so its score leans on the airline's record at this hour.

    Limited track record · 51 flights

    Find Southwest 2705 fares Opens this date on Aviasales

  9. #9 · Southwest 3959

    1:25 PM → 4:25 PM2h 00m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    50%

    chance on time

    On time (history)
    29%
    Cancelled
    14.3%
    Avg arrival delay
    35 min
    • Arrived on time 29% of the time (24 flights, Jun 2025 to May 2026).
    • Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 ground stops and delay programs started).
    • Lands inside LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.
    • Short track record (24 flights), so its score leans on the airline's record at this hour.

    Limited track record · 24 flights

    Find Southwest 3959 fares Opens this date on Aviasales

  10. #10 · Southwest 1929

    8:20 PM → 11:20 PM2h 00m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    47%

    chance on time

    On time (history)
    30%
    Cancelled
    13.0%
    Avg arrival delay
    62 min
    • Arrived on time 30% of the time (20 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 53% on time; Before 9 AM: 85%).
    • Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 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 Southwest 1929 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines66%

    2,368 flights · 69% on time as flown · 3.9% cancel

On time by departure time

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

  • Before 9 AM85%

    680 flights · avg delay 8 min

  • 9 AM to noon78%

    356 flights · avg delay 13 min

  • Noon to 3 PM61%

    593 flights · avg delay 26 min

  • 3 to 6 PM59%

    232 flights · avg delay 25 min

  • 6 to 9 PM53%

    507 flights · avg delay 32 min

Best day: Saturday (83%). Worst: Sunday (70%).

Smarter routing

Nearby airports that run more on time

  • ORD → HPN 75% chance on time

    Chicago O'Hare International Airport to Westchester County Airport · 1,477 flights a year · 37 mi from your airports · yours: 66%

    Rank flightsFares

  • ORD → JFK 71% chance on time

    Chicago O'Hare International Airport to John F. Kennedy International Airport · 1,964 flights a year · 26 mi from your airports · yours: 66%

    Rank flightsFares

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
80
F
84
M
68
A
76
M
69
J
65
J
65
A
71
S
79
O
78
N
81
D
71

What delays this route

  • Air traffic control and airport volume51%
  • Airline (crew, maintenance, boarding)24%
  • Late-arriving aircraft24%
  • Severe weather1%

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

MDW to LGA questions

What time of day is best to fly MDW to LGA?
Before 9 AM: 85% of flights arrived on time, against 53% 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 MDW to LGA?
Southwest, with a season-adjusted 66% chance of operating and arriving on time over 2,368 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 MDW to LGA?
June (65% on time); the best was February (84%), 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 MDW

Live status: FAA delays and ground stops