Find the flight least likely to be delayed

1. Best overall#1 · Nonstop · 1h 40m

   8:25 AM → 10:00 AM

   88%

   arrive on time

   8:25 AM GRR → 10:00 AM BWI1h 40m

   Southwest 1523

   Boeing 737-800 or 737-700 · 4–22 yrs old

   88% on time · 0.9% cancel
   Why this ranks here

   Find Southwest 1523 fares ↗Opens this date on Aviasales

2. #2 · Nonstop · 1h 35m

   3:05 PM → 4:40 PM

   81%

   arrive on time

   3:05 PM GRR → 4:40 PM BWI1h 35m

   Southwest 3875

   Boeing 737-700 · 8–25 yrs old

   82% on time · 1.1% cancel
   Why this ranks here

   Find Southwest 3875 fares ↗Opens this date on Aviasales

3. #3 · Nonstop · 1h 35m

   3:15 PM → 4:50 PM

   77%

   arrive on time

   3:15 PM GRR → 4:50 PM BWI1h 35m

   Southwest 1072

   Boeing 737-700 · 18–23 yrs old

   78% on time · 1.0% cancel
   Why this ranks here

   Find Southwest 1072 fares ↗Opens this date on Aviasales

4. #4 · 1 connection · 5h 15m · one ticket (Southwest)

   6:30 AM → 11:50 AM

   96%

   connections made

   84%

   arrive on time

   6:30 AM GRR → 6:35 AM MDW1h 00m

   Southwest 2237 · also flew as 3238

   Boeing 737-700 · 3–23 yrs old

   83% on time · 1.1% cancel

   Connect in MDW · 2h 25m · 99% chance to make it · same ticket: the airline rebooks you if you miss it

   9:00 AM MDW → 11:50 AM BWI1h 50m

   Southwest 1266

   Boeing 737-800 or 737 MAX 8 · 1–12 yrs old

   87% on time · 2.0% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 2237 + Southwest 1266 on Aviasales

5. #5 · 1 connection · 6h 09m · one ticket (Delta)

   5:30 AM → 11:39 AM

   93%

   connections made

   84%

   arrive on time

   5:30 AM GRR → 6:27 AM DTW57m

   SkyWest 4094 · sold as Delta Connection · also flew as 3655, 4122

   Bombardier CRJ900 · 7–20 yrs old

   85% on time · 1.1% cancel

   Connect in DTW · 3h 43m · 95% 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 SkyWest 4094 + Delta 1392 on Aviasales

6. #6 · 1 connection · 4h 58m · one ticket (Delta)

   5:30 AM → 10:30 AM

   92%

   connections made

   78%

   arrive on time

   5:30 AM GRR → 6:27 AM DTW57m

   SkyWest 4094 · sold as Delta Connection · also flew as 3655, 4122

   Bombardier CRJ900 · 7–20 yrs old

   85% on time · 1.1% cancel

   Connect in DTW · 2h 28m · 94% chance to make it · same ticket: the airline rebooks you if you miss it

   8:55 AM DTW → 10:30 AM BWI1h 33m

   Delta 1546

   Boeing 717 or Airbus A319 · 23–27 yrs old

   85% on time · 0.6% cancel
   Why this ranks here

   Find this Delta trip ↗Look for SkyWest 4094 + Delta 1546 on Aviasales

7. #7 · 1 connection · 5h 37m · one ticket

   5:34 AM → 11:11 AM

   90%

   connections made

   79%

   arrive on time

   5:34 AM GRR → 5:50 AM ORD1h 16m

   SkyWest 4899 · sold as United Express, Delta Connection, American Eagle or Alaska

   Bombardier CRJ700 · 20–22 yrs old

   79% on time · 2.9% cancel

   Connect in ORD · 2h 15m · 95% chance to make it · same ticket: the airline rebooks you if you miss it

   8:05 AM ORD → 11:11 AM BWI2h 06m

   Republic 4693 · sold as American Eagle, Delta Connection or United Express

   Embraer E175 · 12–19 yrs old

   88% on time · 2.3% cancel
   Why this ranks here

   Find this one-ticket trip ↗Look for SkyWest 4899 + Republic 4693 on Aviasales

8. #8 · 1 connection · 5h 04m · one ticket

   6:07 AM → 11:11 AM

   85%

   connections made

   75%

   arrive on time

   6:07 AM GRR → 6:20 AM ORD1h 13m

   Republic 3651 · sold as American Eagle, Delta Connection or United Express · also flew as 3709

   Embraer E175 · 2–11 yrs old

   84% on time · 1.7% cancel

   Connect in ORD · 1h 45m · 89% chance to make it · same ticket: the airline rebooks you if you miss it

   8:05 AM ORD → 11:11 AM BWI2h 06m

   Republic 4693 · sold as American Eagle, Delta Connection or United Express

   Embraer E175 · 12–19 yrs old

   88% on time · 2.3% cancel
   Why this ranks here

   Find this one-ticket trip ↗Look for Republic 3651 + Republic 4693 on Aviasales

9. #9 · 1 connection · 6h 11m · one ticket (American)

   5:00 AM → 11:11 AM

   89%

   connections made

   78%

   arrive on time

   5:00 AM GRR → 5:11 AM ORD1h 11m

   American 337

   Airbus A319 · 11–27 yrs old

   88% on time · 5.2% cancel

   Connect in ORD · 2h 54m · 96% chance to make it · same ticket: the airline rebooks you if you miss it

   8:05 AM ORD → 11:11 AM BWI2h 06m

   Republic 4693 · sold as American Eagle

   Embraer E175 · 12–19 yrs old

   88% on time · 2.3% cancel
   Why this ranks here

   Find this American trip ↗Look for American 337 + Republic 4693 on Aviasales

10. #10 · 1 connection · 5h 11m · one ticket (American)

    6:00 AM → 11:11 AM

    85%

    connections made

    75%

    arrive on time

    6:00 AM GRR → 6:14 AM ORD1h 14m

    Envoy 3574 · sold as American Eagle

    Embraer E175 · 5–17 yrs old

    83% on time · 3.9% cancel

    Connect in ORD · 1h 51m · 91% chance to make it · same ticket: the airline rebooks you if you miss it

    8:05 AM ORD → 11:11 AM BWI2h 06m

    Republic 4693 · sold as American Eagle

    Embraer E175 · 12–19 yrs old

    88% on time · 2.3% cancel
    Why this ranks here

    Find this American trip ↗Look for Envoy 3574 + Republic 4693 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.