Skip to content

All Products

Aviation Intelligence

Alerts & Airspace

Free Pilot Tools & Widgets

RC Aviation

Games & Learning

Weather Research & More

Pilot Resources

My Airports

Your shortcuts, saved on this device. Search to add an airport.

No airports saved yet. Add the fields you visit most.

Ask ATIS

Route on-time record

MCO to IAD: most on-time flights and the best time to fly

Orlando (Orlando International Airport) to Dulles (Washington Dulles International Airport). 2,204 nonstop flights in Jun 2025 to May 2026, 82% arrived within 15 minutes and 0.9% were cancelled. The most reliable flight number was United 1126 at 8:55 AM.

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

MCO → IAD

Orlando to Dulles: 2,204 nonstop flights a year

On time (12 months)

82%

Cancelled

0.9%

avg delay 16 min

Best time to leave

Before 9 AM

99% on time vs 67% 6 to 9 PM

Most reliable airline

United

81% chance on time

Check MCO to IAD fares

Lowest nonstop fare seen in the next two months: $78 (Frontier 4230 on 2026-11-06). 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 1126

    8:55 AM → 11:14 AM2h 19m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 276; its record covers all of them.

    94%

    chance on time

    On time (history)
    95%
    Cancelled
    0.0%
    Avg arrival delay
    2 min
    • Arrived on time 95% of the time (88 flights, Jun 2025 to May 2026).
    • Never cancelled in 88 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 99% on time; 6 to 9 PM: 67%).
    • 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 · 88 flights

    Find United 1126 fares Opens this date on Aviasales

  2. #2 · United 1893

    9:38 AM → 11:55 AM2h 17m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 453; its record covers all of them.

    92%

    chance on time

    On time (history)
    95%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 95% of the time (97 flights, Jun 2025 to May 2026).
    • Never cancelled in 97 scheduled flights.
    • 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 · 97 flights

    Find United 1893 fares Opens this date on Aviasales

  3. #3 · United 646

    11:07 AM → 1:29 PM2h 22m nonstop

    Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as United 2100; its record covers all of them.

    87%

    chance on time

    On time (history)
    91%
    Cancelled
    1.3%
    Avg arrival delay
    15 min
    • Arrived on time 91% of the time (76 flights, Jun 2025 to May 2026).
    • Departs outside MCO's trouble window (1 PM to 7 PM, when 76% of its 89 ground stops and delay programs started).
    • Lands inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.

    Moderate track record · 76 flights

    Find United 646 fares Opens this date on Aviasales

  4. #4 · United 2065

    1:40 PM → 4:02 PM2h 22m nonstop

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

    82%

    chance on time

    On time (history)
    83%
    Cancelled
    0.7%
    Avg arrival delay
    14 min
    • Arrived on time 83% of the time (282 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.
    • Lands inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.

    Strong track record · 282 flights

    Find United 2065 fares Opens this date on Aviasales

  5. #5 · Frontier 4812

    5:05 AM → 7:24 AM2h 22m nonstop

    Local times, typical schedule. Last flown 2026-05-04.

    80%

    chance on time

    On time (history)
    81%
    Cancelled
    2.9%
    Avg arrival delay
    18 min
    • Arrived on time 81% of the time (199 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 99% on time; 6 to 9 PM: 67%).
    • 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 · 199 flights

    Find Frontier 4812 fares Opens this date on Aviasales

  6. #6 · Frontier 4230

    4:18 PM → 6:42 PM2h 24m nonstop

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

    73%

    chance on time

    On time (history)
    82%
    Cancelled
    2.2%
    Avg arrival delay
    7 min
    • Arrived on time 82% of the time (44 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.
    • Lands inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.
    • Short track record (44 flights), so its score leans on the airline's record at this hour.

    Limited track record · 44 flights

    Find Frontier 4230 fares Opens this date on Aviasales

  7. #7 · United 413

    4:20 PM → 6:42 PM2h 22m nonstop

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

    73%

    chance on time

    On time (history)
    74%
    Cancelled
    0.3%
    Avg arrival delay
    26 min
    • Arrived on time 74% of the time (288 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.
    • Lands inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.

    Strong track record · 288 flights

    Find United 413 fares Opens this date on Aviasales

  8. #8 · United 1997

    6:54 PM → 9:16 PM2h 22m nonstop

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

    71%

    chance on time

    On time (history)
    73%
    Cancelled
    0.6%
    Avg arrival delay
    23 min
    • Arrived on time 73% of the time (179 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 67% on time; Before 9 AM: 99%).
    • Departs inside MCO's trouble window: 76% of its 89 ground stops and delay programs started between 1 PM and 7 PM.
    • 58% of its delay minutes came from the plane arriving late from an earlier flight.

    Moderate track record · 179 flights

    Find United 1997 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines81%

    1,932 flights · 82% on time as flown · 0.6% cancel

  • Frontier Airlines77%

    272 flights · 79% on time as flown · 2.0% cancel

On time by departure time

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

  • Before 9 AM99%

    270 flights · avg delay 1 min

  • 9 AM to noon89%

    647 flights · avg delay 8 min

  • Noon to 3 PM82%

    443 flights · avg delay 14 min

  • 3 to 6 PM73%

    446 flights · avg delay 26 min

  • 6 to 9 PM67%

    398 flights · avg delay 32 min

Best day: Tuesday (87%). Worst: Sunday (74%).

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
81
F
83
M
79
A
87
M
77
J
70
J
65
A
73
S
84
O
87
N
87
D
83

What delays this route

  • Late-arriving aircraft44%
  • Airline (crew, maintenance, boarding)27%
  • Air traffic control and airport volume24%
  • Severe weather5%

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

MCO to IAD questions

What time of day is best to fly MCO to IAD?
Before 9 AM: 99% of flights arrived on time, against 67% 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 MCO to IAD?
United, with a season-adjusted 81% chance of operating and arriving on time over 1,932 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 MCO to IAD?
July (65% on time); the best was April (87%), 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 MCO

Live status: FAA delays and ground stops