Find the flight least likely to be delayed

1. Best overall#1 · Nonstop · 3h 10m

   5:15 AM → 10:25 AM

   79%

   arrive on time

   5:15 AM TUS → 10:25 AM MDW3h 10m

   Southwest 2500

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

   80% on time · 0.8% cancel
   Why this ranks here

   Find Southwest 2500 fares ↗Opens this date on Aviasales

2. #2 · 1 connection · 7h 55m · one ticket (Southwest)

   6:40 PM → 4:35 AM

   94%

   connections made

   89%

   arrive on time

   6:40 PM TUS → 8:00 PM SAN1h 20m

   Southwest 2664 · also flew as 199

   Boeing 737 MAX 8 or 737-800 · 1–22 yrs old

   57% on time · 0.3% cancel

   Connect in SAN · 2h 40m · 96% chance to make it · same ticket: the airline rebooks you if you miss it

   10:40 PM SAN → 4:35 AM MDW3h 55m

   Southwest 4094 · also flew as 990

   Boeing 737-700 · 9–23 yrs old

   94% on time · 1.4% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 2664 + Southwest 4094 on Aviasales

3. #3 · 1 connection · 9h 00m · one ticket (Southwest)

   5:35 PM → 4:35 AM

   97%

   connections made

   91%

   arrive on time

   5:35 PM TUS → 7:05 PM SAN1h 30m

   Southwest 1614

   Boeing 737-700 · 17–22 yrs old

   77% on time · 0.4% cancel

   Connect in SAN · 3h 35m · 99% chance to make it · same ticket: the airline rebooks you if you miss it

   10:40 PM SAN → 4:35 AM MDW3h 55m

   Southwest 4094 · also flew as 990

   Boeing 737-700 · 9–23 yrs old

   94% on time · 1.4% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 1614 + Southwest 4094 on Aviasales

4. #4 · 1 connection · 6h 10m · one ticket (Southwest)

   5:35 AM → 1:45 PM

   94%

   connections made

   83%

   arrive on time

   5:35 AM TUS → 6:30 AM PHX55m

   Southwest 4637

   Boeing 737-700 · 17–22 yrs old

   93% on time · 0.2% cancel

   Connect in PHX · 1h 50m · 95% chance to make it · same ticket: the airline rebooks you if you miss it

   8:20 AM PHX → 1:45 PM MDW3h 25m

   Southwest 2052

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

   88% on time · 1.0% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 4637 + Southwest 2052 on Aviasales

5. #5 · 1 connection · 5h 55m · one ticket (Southwest)

   5:50 AM → 1:45 PM

   93%

   connections made

   82%

   arrive on time

   5:50 AM TUS → 6:45 AM PHX55m

   Southwest 1088

   Boeing 737-700 · 18–23 yrs old

   93% on time · 0.2% cancel

   Connect in PHX · 1h 35m · 94% chance to make it · same ticket: the airline rebooks you if you miss it

   8:20 AM PHX → 1:45 PM MDW3h 25m

   Southwest 2052

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

   88% on time · 1.0% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 1088 + Southwest 2052 on Aviasales

6. #6 · 1 connection · 5h 45m · one ticket (Southwest)

   5:35 AM → 1:25 PM

   93%

   connections made

   79%

   arrive on time

   5:35 AM TUS → 6:30 AM PHX55m

   Southwest 4637

   Boeing 737-700 · 17–22 yrs old

   93% on time · 0.2% cancel

   Connect in PHX · 1h 30m · 94% chance to make it · same ticket: the airline rebooks you if you miss it

   8:00 AM PHX → 1:25 PM MDW3h 20m

   Southwest 2400

   Boeing 737 MAX 8 or 737-800 · 1–11 yrs old

   85% on time · 1.0% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 4637 + Southwest 2400 on Aviasales

7. #7 · 1 connection · 5h 30m · one ticket (Southwest)

   5:50 AM → 1:25 PM

   91%

   connections made

   78%

   arrive on time

   5:50 AM TUS → 6:45 AM PHX55m

   Southwest 1088

   Boeing 737-700 · 18–23 yrs old

   93% on time · 0.2% cancel

   Connect in PHX · 1h 15m · 93% chance to make it · same ticket: the airline rebooks you if you miss it

   8:00 AM PHX → 1:25 PM MDW3h 20m

   Southwest 2400

   Boeing 737 MAX 8 or 737-800 · 1–11 yrs old

   85% on time · 1.0% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 1088 + Southwest 2400 on Aviasales

8. #8 · 1 connection · 6h 05m · one ticket (Southwest)

   5:05 AM → 1:10 PM

   94%

   connections made

   80%

   arrive on time

   5:05 AM TUS → 6:30 AM LAS1h 25m

   Southwest 2860 · also flew as 3128

   Boeing 737-700 · 1–22 yrs old

   95% on time · 0.5% cancel

   Connect in LAS · 1h 10m · 95% chance to make it · same ticket: the airline rebooks you if you miss it

   7:40 AM LAS → 1:10 PM MDW3h 30m

   Southwest 3198

   Boeing 737 MAX 8 or 737-800 · 2–14 yrs old

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

   Find this Southwest trip ↗Look for Southwest 2860 + Southwest 3198 on Aviasales

9. #9 · 1 connection · 5h 40m · one ticket (Southwest)

   6:35 AM → 2:15 PM

   94%

   connections made

   78%

   arrive on time

   6:35 AM TUS → 9:25 AM DEN1h 50m

   Southwest 4597

   Boeing 737 MAX 8 or 737-800 · 1–20 yrs old

   93% on time · 0.5% cancel

   Connect in DEN · 1h 30m · 96% chance to make it · same ticket: the airline rebooks you if you miss it

   10:55 AM DEN → 2:15 PM MDW2h 20m

   Southwest 1941

   Boeing 737 MAX 8 or 737-700 · 2–21 yrs old

   83% on time · 1.8% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 4597 + Southwest 1941 on Aviasales

10. #10 · 1 connection · 10h 10m · one ticket (Southwest)

    4:25 PM → 4:35 AM

    98%

    connections made

    92%

    arrive on time

    4:25 PM TUS → 5:50 PM SAN1h 25m

    Southwest 4281

    Boeing 737 MAX 8 · 0–10 yrs old

    70% on time · 0.4% cancel

    Connect in SAN · 4h 50m · 100% chance to make it · same ticket: the airline rebooks you if you miss it

    10:40 PM SAN → 4:35 AM MDW3h 55m

    Southwest 4094 · also flew as 990

    Boeing 737-700 · 9–23 yrs old

    94% on time · 1.4% cancel
    Why this ranks here

    Find this Southwest trip ↗Look for Southwest 4281 + Southwest 4094 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.