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Route on-time record

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

Jacksonville (Jacksonville International Airport) to Dulles (Washington Dulles International Airport). 762 nonstop flights in Jun 2025 to May 2026, 88% arrived within 15 minutes and 1.0% were cancelled. The most reliable flight number was United 1434 at 9:20 AM.

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

JAX → IAD

Jacksonville to Dulles: 762 nonstop flights a year

On time (12 months)

88%

Cancelled

1.0%

avg delay 12 min

Best time to leave

9 AM to noon

92% on time vs 39% 3 to 6 PM

Most reliable airline

Republic

90% chance on time

Check JAX to IAD fares

Lowest nonstop fare seen in the next two months: $305 (United 1304 on 2026-10-26). 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 1434

    9:20 AM → 11:14 AM1h 54m nonstop

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

    91%

    chance on time

    On time (history)
    92%
    Cancelled
    0.7%
    Avg arrival delay
    9 min
    • Arrived on time 92% of the time (134 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (9 AM to noon: 92% on time; 3 to 6 PM: 39%).

    Moderate track record · 134 flights

    Find United 1434 fares Opens this date on Aviasales

  2. #2 · United 1938

    12:24 PM → 2:18 PM1h 54m nonstop

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

    89%

    chance on time

    On time (history)
    90%
    Cancelled
    0.7%
    Avg arrival delay
    10 min
    • Arrived on time 90% of the time (295 flights, Jun 2025 to May 2026).
    • 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 · 295 flights

    Find United 1938 fares Opens this date on Aviasales

  3. #3 · United 1451

    7:03 PM → 8:57 PM1h 54m nonstop

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

    89%

    chance on time

    On time (history)
    89%
    Cancelled
    0.0%
    Avg arrival delay
    6 min
    • Arrived on time 89% of the time (19 flights, Jun 2025 to May 2026).
    • Short track record (19 flights), so its score leans on the airline's record at this hour.

    Limited track record · 19 flights

    Find United 1451 fares Opens this date on Aviasales

  4. #4 · United 2752

    11:48 AM → 1:44 PM1h 56m nonstop

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

    89%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    2 min
    • Arrived on time 91% of the time (11 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (9 AM to noon: 92% on time; 3 to 6 PM: 39%).
    • 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 (11 flights), so its score leans on the airline's record at this hour.

    Limited track record · 11 flights

    Find United 2752 fares Opens this date on Aviasales

  5. #5 · United 1385

    6:50 PM → 8:40 PM1h 50m nonstop

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

    84%

    chance on time

    On time (history)
    75%
    Cancelled
    0.0%
    Avg arrival delay
    18 min
    • Arrived on time 75% of the time (24 flights, Jun 2025 to May 2026).
    • Short track record (24 flights), so its score leans on the airline's record at this hour.

    Limited track record · 24 flights

    Find United 1385 fares Opens this date on Aviasales

  6. #6 · Allegiant 369

    12:51 PM → 2:44 PM1h 53m nonstop

    Local times, typical schedule. Last flown 2026-05-18.

    73%

    chance on time

    On time (history)
    75%
    Cancelled
    0.0%
    Avg arrival delay
    6 min
    • Arrived on time 75% of the time (12 flights, Jun 2025 to May 2026).
    • 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 (12 flights), so its score leans on the airline's record at this hour.

    Limited track record · 12 flights

    Find Allegiant 369 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Republic Airways (sold as American Eagle, Delta Connection or United Express)90%

    128 flights · 94% on time as flown · 1.6% cancel

  • United Airlines89%

    574 flights · 90% on time as flown · 0.9% cancel

  • Allegiant Air71%

    60 flights · 52% on time as flown · 0.7% cancel

On time by departure time

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

  • 9 AM to noon92%

    361 flights · avg delay 9 min

  • Noon to 3 PM89%

    322 flights · avg delay 11 min

  • 3 to 6 PM39%

    36 flights · avg delay 49 min

  • 6 to 9 PM81%

    43 flights · avg delay 13 min

Best day: Tuesday (89%). Worst: Friday (80%).

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
85
F
89
M
85
A
91
M
82
J
78
J
72
A
80
S
89
O
93
N
84
D
84

What delays this route

  • Airline (crew, maintenance, boarding)38%
  • Late-arriving aircraft31%
  • Air traffic control and airport volume29%
  • Severe weather3%

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 JAX to IAD…

JAX to IAD questions

What time of day is best to fly JAX to IAD?
9 AM to noon: 92% of flights arrived on time, against 39% for departures 3 to 6 PM.
Which airline is most on time from JAX to IAD?
Republic, with a season-adjusted 90% chance of operating and arriving on time over 128 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 JAX to IAD?
July (72% on time); the best was October (93%), 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 JAX

Live status: FAA delays and ground stops