Flights Washington → Louisville
IAD → SDF
Route overview
The flight route from Washington to Louisville has a high on-time performance rate of 90%, with an average delay of just 5.4 minutes. Over the course of a year, this route sees 176 flights, connecting one of the nation's major cities with a destination that handles over three million passengers annually at its airport.
Your rights on this US flight (DOT)
US flights have no statutory cash compensation for delays. Under the US DOT rules, if your flight is cancelled or significantly changed and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Amenities for controllable delays depend on each airline's contract of carriage.
US flight refund rules & checker →General information, not legal advice.
The Washington (IAD) → Louisville (SDF) route is operated by United Airlines. Across 230 flights monitored in recent months, 87% arrived on time (within 15 min of schedule), with an average delay of 11 minutes. The cancellation rate is 0.00%. FlightGuard's average computed risk is 15.4/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Louisville the average ATFM delay is 2.0 minutes (main cause: atfm). Departing from Washington the average ATFM delay is 2.0 minutes.
Heading to Louisville: what to expect in this direction
Flying from Washington (IAD) to Louisville (SDF) heads west for about 725 km, a flight time of roughly 1h 20m.
Departures from Washington on this leg cluster in the midday window: about 52% of IAD-SDF flights take off then.
Air-traffic congestion: departing Washington the average ATFM delay is 2.0 min (atfm); arriving into Louisville it is 2.0 min (atfm).
Across 230 tracked IAD-SDF flights, 87% left on time with an average delay of 11 min and a 0.0% cancellation rate.
Route facts
Flights on this route
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Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| United Airlines (UA) | 74% | 10 min | 6.9% |
Airlines operating IAD-SDF
Airports
Frequently asked questions about IAD-SDF
On the Washington (IAD) -> Louisville (SDF) route, on-time performance is 87% with an average delay of 11 minutes, based on 230 tracked flights.
The cancellation rate on Washington-Louisville is 0.00% across 230 monitored flights.
The route is operated by 1 airline: United Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at Louisville, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
US flights have no statutory cash compensation for delays. Under US DOT rules, if the airline cancels or significantly changes your flight and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Meals or hotels for controllable delays depend on each airline's contract of carriage.
