ORD to IAD flight delays & on-time performance
Nonstop flights from Chicago O'Hare International Airport to Washington Dulles International Airport · 588 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ORD or IAD right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Chicago (ORD) to Washington (IAD) arrived on time 76% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.8% were cancelled, and 9% arrived an hour or more late.
- United Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 6am did best (100% on time); around 5pm did worst (52%).
- Tuesday was the most reliable day to fly (80% on time) and Sunday the least (71%).
- The largest source of delay minutes was late-arriving aircraft (36%).
Which airline is most on time from ORD to IAD?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 76% | 0.8% | 19 min | 9.0% | 2,082 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am100%72 flights
- 8am87%353 flights
- 10am90%90 flights
- 11am89%121 flights
- 12pm87%89 flights
- 1pm72%276 flights
- 2pm73%293 flights
- 3pm77%73 flights
- 4pm60%53 flights
- 5pm52%110 flights
- 6pm64%254 flights
- 9pm71%275 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday75%1.0% cancelled
- Tuesday80%0.7% cancelled
- Wednesday73%0.0% cancelled
- Thursday76%0.3% cancelled
- Friday77%0.3% cancelled
- Saturday79%1.4% cancelled
- Sunday71%1.7% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft36%
- Airline (crew, maintenance, cleaning, fueling)30%
- Air traffic control & airport congestion24%
- Extreme weather10%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
ORD to IAD: common questions
- How often are ORD to IAD flights on time?
- 76% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Chicago to Washington cancelled?
- 0.8% of scheduled flights were cancelled (16 of 2,082).
- How long are typical delays?
- Across all flights the average arrival delay was 19 min (early arrivals count as zero). Flights that were late arrived 76 min behind schedule on average, and 9.0% of flights were an hour or more late.
- How long is taxi time at ORD?
- Flights on this route spent 28 min taxiing from the gate to takeoff on average.
Related routes
Return trip: IAD to ORD — 75% on time
More flights from Chicago
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ORD → IAD, nonstop flights by US airlines that report to the DOT. How we calculate this.