MCI to IAD flight delays & on-time performance
Nonstop flights from Kansas City International Airport to Washington Dulles International Airport · 926 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at MCI or IAD right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Kansas City (MCI) to Washington (IAD) arrived on time 86% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 3.5% were cancelled, and 8% arrived an hour or more late.
- United Airlines was the most punctual airline here (90% on time); Republic Airways was the least (82%).
- Departures scheduled around 12pm did best (90% on time); around 5pm did worst (82%).
- Friday was the most reliable day to fly (95% on time) and Sunday the least (75%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (49%).
Which airline is most on time from MCI 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 | 90% | 1.4% | 17 min | 5.6% | 72 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 82% | 5.6% | 25 min | 10.3% | 72 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 12pm90%72 flights
- 5pm82%72 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday90%0.0% cancelled
- Tuesday94%15.0% cancelled
- Wednesday80%0.0% cancelled
- Thursday90%4.5% cancelled
- Friday95%4.5% cancelled
- Saturday80%0.0% cancelled
- Sunday75%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)49%
- Late-arriving aircraft40%
- Air traffic control & airport congestion10%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather60%
- Air traffic control & airport congestion40%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
MCI to IAD: common questions
- How often are MCI to IAD flights on time?
- 86% 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 Kansas City to Washington cancelled?
- 3.5% of scheduled flights were cancelled (5 of 144).
- How long are typical delays?
- Across all flights the average arrival delay was 21 min (early arrivals count as zero). Flights that were late arrived 149 min behind schedule on average, and 7.9% of flights were an hour or more late.
- How long is taxi time at MCI?
- Flights on this route spent 16 min taxiing from the gate to takeoff on average.
Related routes
Return trip: IAD to MCI — 78% on time
More flights from Kansas City
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: MCI → IAD, nonstop flights by US airlines that report to the DOT. How we calculate this.