IAD to EYW flight delays & on-time performance
Nonstop flights from Washington Dulles International Airport to Key West International Airport · 1,024 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at IAD or EYW 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 Key West (EYW) arrived on time 68% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.9% were cancelled, and 3% arrived an hour or more late.
- Republic Airways is the only airline reporting nonstop flights on this route.
- Departures scheduled around 8am did best (89% on time); around 1pm did worst (63%).
- Tuesday was the most reliable day to fly (93% on time) and Thursday the least (50%).
- The largest source of delay minutes was air traffic control & airport congestion (75%).
Which airline is most on time from IAD to EYW?
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. | 68% | 0.9% | 12 min | 2.7% | 114 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am89%19 flights
- 12pm67%18 flights
- 1pm63%77 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday69%5.9% cancelled
- Tuesday93%0.0% cancelled
- Wednesday67%0.0% cancelled
- Thursday50%0.0% cancelled
- Friday65%0.0% cancelled
- Saturday53%0.0% cancelled
- Sunday82%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.
- Air traffic control & airport congestion75%
- Airline (crew, maintenance, cleaning, fueling)22%
- Late-arriving aircraft2%
- Extreme weather1%
- 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 EYW: common questions
- How often are IAD to EYW flights on time?
- 68% 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 Key West cancelled?
- 0.9% of scheduled flights were cancelled (1 of 114).
- How long are typical delays?
- Across all flights the average arrival delay was 12 min (early arrivals count as zero). Flights that were late arrived 35 min behind schedule on average, and 2.7% of flights were an hour or more late.
- How long is taxi time at IAD?
- Flights on this route spent 24 min taxiing from the gate to takeoff on average.
Related routes
Return trip: EYW to IAD — 74% 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 → EYW, nonstop flights by US airlines that report to the DOT. How we calculate this.