BWI to SDF flight delays & on-time performance
Nonstop flights from Baltimore/Washington International Thurgood Marshall Airport to Louisville Muhammad Ali International Airport · 495 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BWI or SDF right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Baltimore (BWI) to Louisville (SDF) arrived on time 80% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 2.1% were cancelled, and 6% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 8pm did best (92% on time); around 10pm did worst (66%).
- Tuesday was the most reliable day to fly (87% on time) and Sunday the least (74%).
- The largest source of delay minutes was late-arriving aircraft (53%).
Which airline is most on time from BWI to SDF?
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 |
|---|---|---|---|---|---|
| Southwest Airlines | 80% | 2.1% | 11 min | 6.2% | 890 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 10am89%267 flights
- 11am91%97 flights
- 2pm74%27 flights
- 3pm66%38 flights
- 4pm79%33 flights
- 5pm77%58 flights
- 6pm77%23 flights
- 7pm58%12 flights
- 8pm92%52 flights
- 9pm76%145 flights
- 10pm66%137 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday81%2.2% cancelled
- Tuesday87%2.8% cancelled
- Wednesday85%0.9% cancelled
- Thursday79%1.5% cancelled
- Friday78%1.4% cancelled
- Saturday82%3.4% cancelled
- Sunday74%2.8% 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 aircraft53%
- Airline (crew, maintenance, cleaning, fueling)35%
- Air traffic control & airport congestion11%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather63%
- Airline (crew, maintenance, cleaning, fueling)21%
- Air traffic control & airport congestion16%
- Security0%
BWI to SDF: common questions
- How often are BWI to SDF flights on time?
- 80% 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 Baltimore to Louisville cancelled?
- 2.1% of scheduled flights were cancelled (19 of 890).
- How long are typical delays?
- Across all flights the average arrival delay was 11 min (early arrivals count as zero). Flights that were late arrived 52 min behind schedule on average, and 6.2% of flights were an hour or more late.
- How long is taxi time at BWI?
- Flights on this route spent 14 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SDF to BWI — 87% on time
More flights from Baltimore
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BWI → SDF, nonstop flights by US airlines that report to the DOT. How we calculate this.