IAD to MCI flight delays & on-time performance
Nonstop flights from Washington Dulles International Airport to Kansas City International Airport · 926 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at IAD or MCI right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Washington (IAD) to Kansas City (MCI) arrived on time 78% of the time in Aug 2025 – Jul 2026, in line with the national average.
- 0.7% were cancelled, and 9% arrived an hour or more late.
- Republic Airways was the most punctual airline here (80% on time); United Airlines was the least (77%).
- Departures scheduled around 12pm did best (80% on time); around 5pm did worst (77%).
- Monday was the most reliable day to fly (90% on time) and Wednesday the least (67%).
- The largest source of delay minutes was late-arriving aircraft (37%).
Which airline is most on time from IAD to MCI?
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 |
|---|---|---|---|---|---|
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 80% | 0.0% | 16 min | 8.5% | 72 |
| United Airlines | 77% | 1.4% | 32 min | 9.6% | 74 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 12pm80%72 flights
- 5pm77%74 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday90%0.0% cancelled
- Tuesday79%5.0% cancelled
- Wednesday67%0.0% cancelled
- Thursday82%0.0% cancelled
- Friday77%0.0% 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.
- Late-arriving aircraft37%
- Air traffic control & airport congestion24%
- Extreme weather22%
- Airline (crew, maintenance, cleaning, fueling)17%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
IAD to MCI: common questions
- How often are IAD to MCI flights on time?
- 78% 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 Washington to Kansas City cancelled?
- 0.7% of scheduled flights were cancelled (1 of 146).
- How long are typical delays?
- Across all flights the average arrival delay was 24 min (early arrivals count as zero). Flights that were late arrived 107 min behind schedule on average, and 9.0% of flights were an hour or more late.
- How long is taxi time at IAD?
- Flights on this route spent 25 min taxiing from the gate to takeoff on average.
Related routes
Return trip: MCI to IAD — 86% on time
More flights from Washington
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: IAD → MCI, nonstop flights by US airlines that report to the DOT. How we calculate this.