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Route on-time record

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

Dulles (Washington Dulles International Airport) to Charleston (Charleston International Airport). 761 nonstop flights in Jun 2025 to May 2026, 86% arrived within 15 minutes and 1.1% were cancelled. The most reliable flight number was United 1108 at 8:35 AM.

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

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IAD → CHS

Dulles to Charleston: 761 nonstop flights a year

On time (12 months)

86%

Cancelled

1.1%

avg delay 11 min

Best time to leave

Before 9 AM

94% on time vs 67% 3 to 6 PM

Most reliable airline

United

88% chance on time

Check IAD to CHS fares

Lowest nonstop fare seen in the next two months: $122 (United 1108 on 2026-10-19). 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 1108

    8:35 AM → 10:23 AM1h 48m nonstop

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

    93%

    chance on time

    On time (history)
    93%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 93% of the time (246 flights, Jun 2025 to May 2026).
    • Never cancelled in 246 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 94% on time; 3 to 6 PM: 67%).
    • 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 · 246 flights

    Find United 1108 fares Opens this date on Aviasales

  2. #2 · United 325

    1:05 PM → 2:53 PM1h 48m nonstop

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

    89%

    chance on time

    On time (history)
    89%
    Cancelled
    0.0%
    Avg arrival delay
    21 min
    • Arrived on time 89% of the time (73 flights, Jun 2025 to May 2026).
    • Never cancelled in 73 scheduled flights.
    • Departs inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.
    • 62% of its delay minutes came from the plane arriving late from an earlier flight.

    Moderate track record · 73 flights

    Find United 325 fares Opens this date on Aviasales

  3. #3 · United 2440

    10:15 PM → 11:59 PM1h 44m nonstop

    Local times, typical schedule. Last flown 2026-05-19. Same departure also flew as United 336; its record covers all of them.

    84%

    chance on time

    On time (history)
    79%
    Cancelled
    0.0%
    Avg arrival delay
    16 min
    • Arrived on time 79% of the time (29 flights, Jun 2025 to May 2026).
    • Departs outside IAD's trouble window (1 PM to 7 PM, when 75% of its 63 ground stops and delay programs started).
    • 74% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (29 flights), so its score leans on the airline's record at this hour.

    Limited track record · 29 flights

    Find United 2440 fares Opens this date on Aviasales

  4. #4 · Republic 3487 · sold as American Eagle, Delta Connection or United Express

    12:35 PM → 2:27 PM1h 52m nonstop

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

    83%

    chance on time

    On time (history)
    85%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 85% of the time (177 flights, Jun 2025 to May 2026).
    • Never cancelled in 177 scheduled flights.
    • Departs outside IAD's trouble window (1 PM to 7 PM, when 75% of its 63 ground stops and delay programs started).

    Moderate track record · 177 flights

    Find 12:35 PM flight fares Opens this date on Aviasales

  5. #5 · Republic 3468 · sold as American Eagle, Delta Connection or United Express

    5:10 PM → 7:00 PM1h 50m nonstop

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

    75%

    chance on time

    On time (history)
    76%
    Cancelled
    2.3%
    Avg arrival delay
    15 min
    • Arrived on time 76% of the time (42 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (3 to 6 PM: 67% on time; Before 9 AM: 94%).
    • Departs inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.
    • Short track record (42 flights), so its score leans on the airline's record at this hour.

    Limited track record · 42 flights

    Find 5:10 PM flight fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines88%

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

  • Republic Airways (sold as American Eagle, Delta Connection or United Express)82%

    298 flights · 81% on time as flown · 1.2% cancel

On time by departure time

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

  • Before 9 AM94%

    281 flights · avg delay 4 min

  • Noon to 3 PM86%

    360 flights · avg delay 13 min

  • 3 to 6 PM67%

    88 flights · avg delay 22 min

  • After 9 PM81%

    32 flights · avg delay 14 min

Best day: Wednesday (91%). Worst: Friday (86%).

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
92
M
91
A
90
M
87
J
91
J
84
A
89
S
86
O
92
N
91
D
84

What delays this route

  • Late-arriving aircraft48%
  • Airline (crew, maintenance, boarding)32%
  • Air traffic control and airport volume18%
  • Severe weather2%

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 CHS…

IAD to CHS questions

What time of day is best to fly IAD to CHS?
Before 9 AM: 94% of flights arrived on time, against 67% for departures 3 to 6 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 CHS?
United, with a season-adjusted 88% chance of operating and arriving on time over 463 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 CHS?
January (79% on time); the best was October (92%), 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