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Route on-time record

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

Dulles (Washington Dulles International Airport) to Jacksonville (Jacksonville International Airport). 763 nonstop flights in Jun 2025 to May 2026, 83% arrived within 15 minutes and 1.3% were cancelled. The most reliable flight number was United 2084 at 8:59 AM.

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

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IAD → JAX

Dulles to Jacksonville: 763 nonstop flights a year

On time (12 months)

83%

Cancelled

1.3%

avg delay 14 min

Best time to leave

Before 9 AM

89% on time vs 61% 6 to 9 PM

Most reliable airline

United

86% chance on time

Check IAD to JAX fares

Lowest nonstop fare seen in the next two months: $157 (United 2084 on 2026-10-20). 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 2084

    8:59 AM → 11:09 AM2h 10m nonstop

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

    88%

    chance on time

    On time (history)
    89%
    Cancelled
    1.2%
    Avg arrival delay
    9 min
    • Arrived on time 89% of the time (253 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 61%).
    • Departs outside IAD's trouble window (1 PM to 7 PM, when 75% of its 63 ground stops and delay programs started).

    Strong track record · 253 flights

    Find United 2084 fares Opens this date on Aviasales

  2. #2 · United 1262

    1:10 PM → 3:25 PM2h 15m nonstop

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

    85%

    chance on time

    On time (history)
    84%
    Cancelled
    0.0%
    Avg arrival delay
    11 min
    • Arrived on time 84% of the time (19 flights, Jun 2025 to May 2026).
    • Departs inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.
    • 83% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (19 flights), so its score leans on the airline's record at this hour.

    Limited track record · 19 flights

    Find United 1262 fares Opens this date on Aviasales

  3. #3 · United 293

    5:50 PM → 8:02 PM2h 12m nonstop

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

    84%

    chance on time

    On time (history)
    84%
    Cancelled
    0.0%
    Avg arrival delay
    14 min
    • Arrived on time 84% of the time (109 flights, Jun 2025 to May 2026).
    • Never cancelled in 109 scheduled flights.
    • Departs inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.

    Moderate track record · 109 flights

    Find United 293 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines86%

    575 flights · 87% on time as flown · 0.8% cancel

On time by departure time

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

  • Before 9 AM89%

    203 flights · avg delay 9 min

  • 9 AM to noon87%

    93 flights · avg delay 7 min

  • 3 to 6 PM83%

    375 flights · avg delay 16 min

  • 6 to 9 PM61%

    66 flights · avg delay 33 min

Best day: Wednesday (85%). Worst: Friday (75%).

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
79
F
88
M
78
A
86
M
75
J
75
J
65
A
77
S
86
O
85
N
79
D
78

What delays this route

  • Late-arriving aircraft43%
  • Airline (crew, maintenance, boarding)29%
  • Air traffic control and airport volume22%
  • Severe weather7%

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

Finding the most reliable connections from IAD to JAX…

IAD to JAX questions

What time of day is best to fly IAD to JAX?
Before 9 AM: 89% of flights arrived on time, against 61% 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 IAD to JAX?
United, with a season-adjusted 86% chance of operating and arriving on time over 575 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 IAD to JAX?
July (65% on time); the best was February (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 IAD

Live status: FAA delays and ground stops