Find the flight least likely to be delayed

1. Best overall#1 · Nonstop · 3h 10m

   1:15 PM → 2:25 PM

   83%

   arrive on time

   1:15 PM AUS → 2:25 PM ONT3h 10m

   Southwest 419

   Boeing 737-700 · 3–22 yrs old

   84% on time · 0.2% cancel
   Why this ranks here

   Find Southwest 419 fares ↗Opens this date on Aviasales

2. #2 · Nonstop · 3h 15m

   2:00 PM → 3:20 PM

   79%

   arrive on time

   2:00 PM AUS → 3:20 PM ONT3h 15m

   Southwest 2167

   Boeing 737-800 or 737 MAX 8 · 2–12 yrs old

   79% on time · 0.2% cancel
   Why this ranks here

   Find Southwest 2167 fares ↗Opens this date on Aviasales

3. #3 · 1 connection · 8h 00m · one ticket (Southwest)

   6:00 AM → 12:00 PM

   99%

   connections made

   91%

   arrive on time

   6:00 AM AUS → 7:45 AM SJC3h 45m

   Southwest 3156

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

   86% on time · 0.1% cancel

   Connect in SJC · 2h 55m · 99% chance to make it · same ticket: the airline rebooks you if you miss it

   10:40 AM SJC → 12:00 PM ONT1h 20m

   Southwest 1173

   Boeing 737-700 or 737 MAX 8 · 3–22 yrs old

   92% on time · 0.0% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 3156 + Southwest 1173 on Aviasales

4. #4 · 1 connection · 7h 05m · one ticket (Southwest)

   6:55 AM → 12:00 PM

   96%

   connections made

   88%

   arrive on time

   6:55 AM AUS → 8:50 AM SJC3h 55m

   Southwest 2506

   Boeing 737-800 · 3–14 yrs old

   91% on time · 0.2% cancel

   Connect in SJC · 1h 50m · 96% chance to make it · same ticket: the airline rebooks you if you miss it

   10:40 AM SJC → 12:00 PM ONT1h 20m

   Southwest 1173

   Boeing 737-700 or 737 MAX 8 · 3–22 yrs old

   92% on time · 0.0% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 2506 + Southwest 1173 on Aviasales

5. #5 · 1 connection · 6h 35m · one ticket (Southwest)

   7:25 AM → 12:00 PM

   93%

   connections made

   86%

   arrive on time

   7:25 AM AUS → 9:10 AM SJC3h 45m

   Southwest 865

   Boeing 737-800 or 737 MAX 8 · 1–13 yrs old

   86% on time · 0.2% cancel

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

   10:40 AM SJC → 12:00 PM ONT1h 20m

   Southwest 1173

   Boeing 737-700 or 737 MAX 8 · 3–22 yrs old

   92% on time · 0.0% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 865 + Southwest 1173 on Aviasales

6. #6 · 1 connection · 5h 57m · one ticket (American)

   12:25 PM → 4:22 PM

   93%

   connections made

   83%

   arrive on time

   12:25 PM AUS → 1:04 PM PHX2h 39m

   American 2042

   Boeing 737-800 · 10–27 yrs old

   82% on time · 0.6% cancel

   Connect in PHX · 2h 00m · 93% chance to make it · same ticket: the airline rebooks you if you miss it

   3:04 PM PHX → 4:22 PM ONT1h 18m

   Envoy 4143 · sold as American Eagle

   Embraer E175 · 5–11 yrs old

   89% on time · 0.3% cancel
   Why this ranks here

   Find this American trip ↗Look for American 2042 + Envoy 4143 on Aviasales

7. #7 · 1 connection · 6h 19m · one ticket (Delta)

   11:56 AM → 4:17 PM

   88%

   connections made

   83%

   arrive on time

   11:56 AM AUS → 2:00 PM SLC3h 02m

   Delta 2873

   Airbus A320 or A319 · 23–34 yrs old

   84% on time · 0.6% cancel

   Connect in SLC · 1h 23m · 89% chance to make it · same ticket: the airline rebooks you if you miss it

   3:23 PM SLC → 4:17 PM ONT1h 54m

   SkyWest 3762 · sold as Delta Connection

   Embraer E175 · 4–10 yrs old

   95% on time · 0.5% cancel
   Why this ranks here

   Find this Delta trip ↗Look for Delta 2873 + SkyWest 3762 on Aviasales

8. #8 · 1 connection · 5h 25m · one ticket (Southwest)

   6:40 AM → 10:05 AM

   94%

   connections made

   80%

   arrive on time

   6:40 AM AUS → 7:15 AM PHX2h 35m

   Southwest 421

   Boeing 737-700 · 4–22 yrs old

   94% on time · 0.4% cancel

   Connect in PHX · 1h 30m · 95% chance to make it · same ticket: the airline rebooks you if you miss it

   8:45 AM PHX → 10:05 AM ONT1h 20m

   Southwest 1666

   Boeing 737-700 · 4–23 yrs old

   85% on time · 0.2% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 421 + Southwest 1666 on Aviasales

9. #9 · 1 connection · 4h 51m · one ticket (American)

   6:00 AM → 8:51 AM

   85%

   connections made

   78%

   arrive on time

   6:00 AM AUS → 6:30 AM PHX2h 30m

   American 455 · also flew as 1386

   Airbus A319 or Boeing 737-800 · 9–27 yrs old

   90% on time · 1.4% cancel

   Connect in PHX · 57m · 88% chance to make it · same ticket: the airline rebooks you if you miss it

   7:27 AM PHX → 8:51 AM ONT1h 24m

   American 1423

   Airbus A321 · 6–17 yrs old

   92% on time · 1.1% cancel
   Why this ranks here

   Find this American trip ↗Look for American 455 + American 1423 on Aviasales

10. #10 · 1 connection · 7h 30m · one ticket (Southwest)

    6:55 AM → 12:25 PM

    98%

    connections made

    86%

    arrive on time

    6:55 AM AUS → 8:50 AM SJC3h 55m

    Southwest 2506

    Boeing 737-800 · 3–14 yrs old

    91% on time · 0.2% cancel

    Connect in SJC · 2h 15m · 98% chance to make it · same ticket: the airline rebooks you if you miss it

    11:05 AM SJC → 12:25 PM ONT1h 20m

    Southwest 4138

    Boeing 737-700 · 15–23 yrs old

    88% on time · 0.0% cancel
    Why this ranks here

    Find this Southwest trip ↗Look for Southwest 2506 + Southwest 4138 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.