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Route on-time record

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

Fort Myers (Southwest Florida International Airport) to Dulles (Washington Dulles International Airport). 467 nonstop flights in Jun 2025 to May 2026, 89% arrived within 15 minutes and 1.1% were cancelled. The most reliable flight number was United 2156 at 9:20 AM.

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

RSW → IAD

Fort Myers to Dulles: 467 nonstop flights a year

On time (12 months)

89%

Cancelled

1.1%

avg delay 9 min

Best time to leave

9 AM to noon

93% on time vs 86% 6 to 9 PM

Most reliable airline

United

88% chance on time

Check RSW to IAD 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 · United 2156

    9:20 AM → 11:48 AM2h 28m nonstop

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

    91%

    chance on time

    On time (history)
    93%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 93% of the time (68 flights, Jun 2025 to May 2026).
    • Never cancelled in 68 scheduled flights.
    • Leaves in this route's most on-time window (9 AM to noon: 93% on time; 6 to 9 PM: 86%).

    Moderate track record · 68 flights

    Find United 2156 fares Opens this date on Aviasales

  2. #2 · United 2054

    1:15 PM → 3:49 PM2h 34m nonstop

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

    88%

    chance on time

    On time (history)
    90%
    Cancelled
    1.0%
    Avg arrival delay
    6 min
    • Arrived on time 90% of the time (198 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.

    Moderate track record · 198 flights

    Find United 2054 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines88%

    467 flights · 89% on time as flown · 1.1% cancel

On time by departure time

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

  • 9 AM to noon93%

    114 flights · avg delay 4 min

  • Noon to 3 PM89%

    214 flights · avg delay 7 min

  • 6 to 9 PM86%

    120 flights · avg delay 17 min

Best day: Tuesday (92%). Worst: Sunday (82%).

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
86
F
88
M
86
A
93
M
88
J
78
J
89
A
89
S
86
O
89
N
95
D
90

What delays this route

  • Late-arriving aircraft37%
  • Airline (crew, maintenance, boarding)31%
  • 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 RSW to IAD…

RSW to IAD questions

What time of day is best to fly RSW to IAD?
9 AM to noon: 93% of flights arrived on time, against 86% for departures 6 to 9 PM.
Which airline is most on time from RSW to IAD?
United, with a season-adjusted 88% chance of operating and arriving on time over 467 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 RSW to IAD?
June (78% on time); the best was November (95%), 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 RSW

Live status: FAA delays and ground stops