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Route on-time record

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

Chicago (Chicago O'Hare International Airport) to Baltimore (Baltimore/Washington International Thurgood Marshall Airport). 2,694 nonstop flights in Jun 2025 to May 2026, 72% arrived within 15 minutes and 2.4% were cancelled. The most reliable flight number was Republic 4693 at 8:05 AM.

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

ORD → BWI

Chicago to Baltimore: 2,694 nonstop flights a year

On time (12 months)

72%

Cancelled

2.4%

avg delay 19 min

Best time to leave

Before 9 AM

86% on time vs 63% 6 to 9 PM

Most reliable airline

Spirit

75% chance on time

Check ORD to BWI 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 · Republic 4693 · sold as American Eagle, Delta Connection or United Express

    8:05 AM → 11:11 AM2h 06m nonstop

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

    86%

    chance on time

    On time (history)
    93%
    Cancelled
    0.0%
    Avg arrival delay
    3 min
    • Arrived on time 93% of the time (44 flights, Jun 2025 to May 2026).
    • Never cancelled in 44 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 86% on time; 6 to 9 PM: 63%).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).

    Limited track record · 44 flights

    Find 8:05 AM flight fares Opens this date on Aviasales

  2. #2 · United 1672

    6:45 AM → 9:39 AM1h 54m nonstop

    Local times, typical schedule. Last flown 2026-04-29.

    85%

    chance on time

    On time (history)
    97%
    Cancelled
    0.0%
    Avg arrival delay
    3 min
    • Arrived on time 97% of the time (29 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: 63%).
    • 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 (29 flights), so its score leans on the airline's record at this hour.

    Limited track record · 29 flights

    Find United 1672 fares Opens this date on Aviasales

  3. #3 · United 1269

    7:00 AM → 10:03 AM2h 03m nonstop

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

    85%

    chance on time

    On time (history)
    92%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 92% of the time (26 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: 63%).
    • 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 (26 flights), so its score leans on the airline's record at this hour.

    Limited track record · 26 flights

    Find United 1269 fares Opens this date on Aviasales

  4. #4 · United 2653

    10:48 AM → 1:54 PM2h 06m nonstop

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

    80%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 91% of the time (11 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 (11 flights), so its score leans on the airline's record at this hour.

    Limited track record · 11 flights

    Find United 2653 fares Opens this date on Aviasales

  5. #5 · Envoy 3501 · sold as American Eagle

    3:05 PM → 6:04 PM1h 59m nonstop

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

    77%

    chance on time

    On time (history)
    81%
    Cancelled
    10.0%
    Avg arrival delay
    19 min
    • Arrived on time 81% of the time (27 flights, Jun 2025 to May 2026).
    • Cancelled 10.0% of the time (3 of 30).
    • Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
    • Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.

    Limited track record · 27 flights

    Find 3:05 PM flight fares Opens this date on Aviasales

  6. #6 · Envoy 3446 · sold as American Eagle

    6:56 AM → 10:02 AM2h 06m nonstop

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

    77%

    chance on time

    On time (history)
    70%
    Cancelled
    9.1%
    Avg arrival delay
    9 min
    • Arrived on time 70% of the time (10 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: 63%).
    • 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 (10 flights), so its score leans on the airline's record at this hour.

    Limited track record · 10 flights

    Find 6:56 AM flight fares Opens this date on Aviasales

  7. #7 · United 2333

    11:00 AM → 2:02 PM2h 02m nonstop

    Local times, typical schedule. Last flown 2026-04-29.

    75%

    chance on time

    On time (history)
    77%
    Cancelled
    0.0%
    Avg arrival delay
    13 min
    • Arrived on time 77% of the time (111 flights, Jun 2025 to May 2026).
    • Never cancelled in 111 scheduled flights.
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
    • Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.

    Moderate track record · 111 flights

    Find United 2333 fares Opens this date on Aviasales

  8. #8 · Envoy 3679 · sold as American Eagle

    9:00 AM → 12:02 PM2h 02m nonstop

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

    75%

    chance on time

    On time (history)
    78%
    Cancelled
    4.0%
    Avg arrival delay
    14 min
    • Arrived on time 78% of the time (119 flights, Jun 2025 to May 2026).
    • Cancelled 4.0% of the time (5 of 124).
    • 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 · 119 flights

    Find 9:00 AM flight fares Opens this date on Aviasales

  9. #9 · Envoy 3502 · sold as American Eagle

    2:56 PM → 6:00 PM2h 04m nonstop

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

    74%

    chance on time

    On time (history)
    79%
    Cancelled
    2.3%
    Avg arrival delay
    11 min
    • Arrived on time 79% of the time (43 flights, Jun 2025 to May 2026).
    • Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
    • Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (43 flights), so its score leans on the airline's record at this hour.

    Limited track record · 43 flights

    Find 2:56 PM flight fares Opens this date on Aviasales

  10. #10 · Envoy 3504 · sold as American Eagle

    4:15 PM → 7:22 PM2h 07m nonstop

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

    71%

    chance on time

    On time (history)
    74%
    Cancelled
    2.3%
    Avg arrival delay
    15 min
    • Arrived on time 74% of the time (43 flights, Jun 2025 to May 2026).
    • Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
    • Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (43 flights), so its score leans on the airline's record at this hour.

    Limited track record · 43 flights

    Find 4:15 PM flight fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Spirit Airlines75%

    36 flights · 83% on time as flown · 2.0% cancel

  • Envoy Air (sold as American Eagle)73%

    932 flights · 76% on time as flown · 3.6% cancel

  • Republic Airways (sold as American Eagle, Delta Connection or United Express)70%

    242 flights · 72% on time as flown · 3.0% cancel

  • United Airlines70%

    1,094 flights · 71% on time as flown · 1.4% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)65%

    56 flights · 61% on time as flown · 2.3% cancel

  • Frontier Airlines65%

    150 flights · 65% on time as flown · 3.2% cancel

  • American Airlines64%

    30 flights · 57% on time as flown · 2.0% cancel

  • Southwest Airlines62%

    154 flights · 61% on time as flown · 1.9% cancel

On time by departure time

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

  • Before 9 AM86%

    616 flights · avg delay 8 min

  • 9 AM to noon76%

    358 flights · avg delay 15 min

  • Noon to 3 PM67%

    701 flights · avg delay 24 min

  • 3 to 6 PM71%

    210 flights · avg delay 22 min

  • 6 to 9 PM63%

    757 flights · avg delay 26 min

Best day: Tuesday (80%). Worst: Friday (73%).

Smarter routing

Nearby airports that run more on time

  • MDW → BWI 77% chance on time

    Chicago Midway International Airport to Baltimore/Washington International Thurgood Marshall Airport · 1,856 flights a year · 15 mi from your airports · yours: 70%

    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
72
F
84
M
72
A
78
M
75
J
74
J
68
A
74
S
80
O
81
N
82
D
74

What delays this route

  • Late-arriving aircraft44%
  • Air traffic control and airport volume23%
  • Airline (crew, maintenance, boarding)23%
  • Severe weather10%

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 BWI questions

What time of day is best to fly ORD to BWI?
Before 9 AM: 86% of flights arrived on time, against 63% 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 BWI?
Spirit, with a season-adjusted 75% chance of operating and arriving on time over 36 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 BWI?
July (68% 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 ORD

Live status: FAA delays and ground stops