Find the flight least likely to be delayed

1. Best overall#1 · Nonstop · 1h 35m

   5:45 AM → 7:20 AM

   95%

   arrive on time

   5:45 AM SDF → 7:20 AM BWI1h 35m

   Southwest 4186

   Boeing 737 MAX 8 or 737-800 · 1–14 yrs old

   97% on time · 1.7% cancel
   Why this ranks here

   Find Southwest 4186 fares ↗Opens this date on Aviasales

2. #2 · Nonstop · 1h 35m

   5:25 AM → 7:00 AM

   90%

   arrive on time

   5:25 AM SDF → 7:00 AM BWI1h 35m

   Southwest 4416

   Boeing 737 MAX 8 or 737-800 · 4–12 yrs old

   93% on time · 2.5% cancel
   Why this ranks here

   Find Southwest 4416 fares ↗Opens this date on Aviasales

3. #3 · Nonstop · 1h 35m

   11:10 AM → 12:45 PM

   89%

   arrive on time

   11:10 AM SDF → 12:45 PM BWI1h 35m

   Southwest 1654

   Boeing 737-700 · 17–23 yrs old

   91% on time · 2.0% cancel
   Why this ranks here

   Find Southwest 1654 fares ↗Opens this date on Aviasales

4. #4 · Nonstop · 1h 40m

   3:45 PM → 5:25 PM

   81%

   arrive on time

   3:45 PM SDF → 5:25 PM BWI1h 40m

   Southwest 1324

   Boeing 737 MAX 8 · 2–9 yrs old

   83% on time · 2.1% cancel
   Why this ranks here

   Find Southwest 1324 fares ↗Opens this date on Aviasales

5. #5 · Nonstop · 1h 40m

   4:25 PM → 6:05 PM

   79%

   arrive on time

   4:25 PM SDF → 6:05 PM BWI1h 40m

   Southwest 121 · also flew as 941

   Boeing 737-700 · 15–23 yrs old

   81% on time · 2.1% cancel
   Why this ranks here

   Find Southwest 121 fares ↗Opens this date on Aviasales

6. #6 · Nonstop · 1h 45m

   4:45 PM → 6:30 PM

   79%

   arrive on time

   4:45 PM SDF → 6:30 PM BWI1h 45m

   Southwest 2413

   Boeing 737 MAX 8 or 737-800 · 1–14 yrs old

   80% on time · 2.1% cancel
   Why this ranks here

   Find Southwest 2413 fares ↗Opens this date on Aviasales

7. #7 · 1 connection · 3h 54m · one ticket (Delta)

   7:45 AM → 11:39 AM

   87%

   connections made

   79%

   arrive on time

   7:45 AM SDF → 9:11 AM DTW1h 26m

   Republic 5824 · sold as Delta Connection

   Embraer E175 · 18–19 yrs old

   90% on time · 0.3% cancel

   Connect in DTW · 59m · 89% chance to make it · same ticket: the airline rebooks you if you miss it

   10:10 AM DTW → 11:39 AM BWI1h 29m

   Delta 1392

   Boeing 717 · 24–27 yrs old

   90% on time · 1.6% cancel
   Why this ranks here

   Find this Delta trip ↗Look for Republic 5824 + Delta 1392 on Aviasales

8. #8 · Nonstop · 1h 40m

   5:10 PM → 6:50 PM

   68%

   arrive on time

   5:10 PM SDF → 6:50 PM BWI1h 40m

   Southwest 2308 · also flew as 1925

   Boeing 737-700 · 5–24 yrs old

   70% on time · 2.0% cancel
   Why this ranks here

   Find Southwest 2308 fares ↗Opens this date on Aviasales

9. #9 · 1 connection · 5h 04m · one ticket (American)

   6:31 AM → 11:35 AM

   92%

   connections made

   78%

   arrive on time

   6:31 AM SDF → 8:10 AM CLT1h 39m

   Envoy 3666 · sold as American Eagle

   Embraer E175 · 3–11 yrs old

   94% on time · 1.3% cancel

   Connect in CLT · 1h 59m · 96% chance to make it · same ticket: the airline rebooks you if you miss it

   10:09 AM CLT → 11:35 AM BWI1h 26m

   American 2316

   Airbus A319 · 13–27 yrs old

   85% on time · 2.7% cancel
   Why this ranks here

   Find this American trip ↗Look for Envoy 3666 + American 2316 on Aviasales

10. #10 · 1 connection · 4h 26m · one ticket (American)

    5:00 AM → 9:26 AM

    89%

    connections made

    76%

    arrive on time

    5:00 AM SDF → 6:33 AM CLT1h 33m

    PSA 5255 · sold as American Eagle

    Bombardier CRJ900 · 10–12 yrs old

    89% on time · 1.2% cancel

    Connect in CLT · 1h 27m · 92% chance to make it · same ticket: the airline rebooks you if you miss it

    8:00 AM CLT → 9:26 AM BWI1h 26m

    American 1635

    Airbus A319 · 13–27 yrs old

    85% on time · 1.7% cancel
    Why this ranks here

    Find this American trip ↗Look for PSA 5255 + American 1635 on Aviasales

Aircraft and ages come from the planes each flight number actually flew in the last 3 months of data (FAA registry build years); airlines can swap planes.