Find the flight least likely to be delayed

1. Best overall#1 · Nonstop · 3h 25m

   8:05 AM → 9:30 AM

   81%

   arrive on time

   8:05 AM HOU → 9:30 AM ONT3h 25m

   Southwest 1577

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

   82% on time · 0.7% cancel
   Why this ranks here

   Find Southwest 1577 fares ↗Opens this date on Aviasales

2. #2 · Nonstop · 3h 35m

   8:55 PM → 10:30 PM

   78%

   arrive on time

   8:55 PM HOU → 10:30 PM ONT3h 35m

   Southwest 3865

   Boeing 737 MAX 8 or 737-800 · 1–17 yrs old

   78% on time · 0.2% cancel
   Why this ranks here

   Find Southwest 3865 fares ↗Opens this date on Aviasales

3. #3 · 1 connection · 5h 40m · one ticket (Southwest)

   5:40 AM → 9:20 AM

   93%

   connections made

   84%

   arrive on time

   5:40 AM HOU → 6:35 AM PHX2h 55m

   Southwest 3458

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

   92% on time · 0.5% cancel

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

   7:50 AM PHX → 9:20 AM ONT1h 30m

   Southwest 3829

   Boeing 737 MAX 8 or 737-800 · 1–10 yrs old

   91% on time · 0.2% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 3458 + Southwest 3829 on Aviasales

4. #4 · 1 connection · 5h 50m · one ticket (Southwest)

   6:15 AM → 10:05 AM

   96%

   connections made

   82%

   arrive on time

   6:15 AM HOU → 7:05 AM PHX2h 50m

   Southwest 2394

   Boeing 737-800 or 737-700 · 3–20 yrs old

   94% on time · 0.4% cancel

   Connect in PHX · 1h 40m · 96% 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 2394 + Southwest 1666 on Aviasales

5. #5 · 1 connection · 6h 25m · one ticket (Southwest)

   5:40 AM → 10:05 AM

   97%

   connections made

   83%

   arrive on time

   5:40 AM HOU → 6:35 AM PHX2h 55m

   Southwest 3458

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

   92% on time · 0.5% cancel

   Connect in PHX · 2h 10m · 98% 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 3458 + Southwest 1666 on Aviasales

6. #6 · 1 connection · 5h 50m · one ticket (Southwest)

   5:40 AM → 9:40 AM

   96%

   connections made

   79%

   arrive on time

   5:40 AM HOU → 6:35 AM PHX2h 55m

   Southwest 3458

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

   92% on time · 0.5% cancel

   Connect in PHX · 1h 35m · 96% chance to make it · same ticket: the airline rebooks you if you miss it

   8:10 AM PHX → 9:40 AM ONT1h 20m

   Southwest 3311

   Boeing 737 MAX 8 or 737-700 · 1–22 yrs old

   83% on time · 0.2% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 3458 + Southwest 3311 on Aviasales

7. #7 · 1 connection · 5h 45m · one ticket (Southwest)

   6:05 AM → 9:50 AM

   88%

   connections made

   79%

   arrive on time

   6:05 AM HOU → 7:35 AM DEN2h 30m

   Southwest 2312 · also flew as 3141

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

   94% on time · 0.3% cancel

   Connect in DEN · 55m · 88% chance to make it · same ticket: the airline rebooks you if you miss it

   8:30 AM DEN → 9:50 AM ONT2h 20m

   Southwest 4040 · also flew as 106, 3787

   Boeing 737 MAX 8 or 737-700 · 1–22 yrs old

   90% on time · 0.2% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 2312 + Southwest 4040 on Aviasales

8. #8 · 1 connection · 6h 55m · one ticket (Southwest)

   5:30 AM → 10:25 AM

   98%

   connections made

   82%

   arrive on time

   5:30 AM HOU → 6:50 AM LAS3h 20m

   Southwest 2887

   Boeing 737 MAX 8 or 737-800 · 3–12 yrs old

   96% on time · 0.4% cancel

   Connect in LAS · 2h 30m · 99% chance to make it · same ticket: the airline rebooks you if you miss it

   9:20 AM LAS → 10:25 AM ONT1h 05m

   Southwest 384

   Boeing 737-700 · 1–23 yrs old

   84% on time · 0.6% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 2887 + Southwest 384 on Aviasales

9. #9 · 1 connection · 7h 05m · one ticket (Southwest)

   5:20 AM → 10:25 AM

   99%

   connections made

   82%

   arrive on time

   5:20 AM HOU → 6:35 AM LAS3h 15m

   Southwest 3445

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

   93% on time · 0.3% cancel

   Connect in LAS · 2h 45m · 100% chance to make it · same ticket: the airline rebooks you if you miss it

   9:20 AM LAS → 10:25 AM ONT1h 05m

   Southwest 384

   Boeing 737-700 · 1–23 yrs old

   84% on time · 0.6% cancel
   Why this ranks here

   Find this Southwest trip ↗Look for Southwest 3445 + Southwest 384 on Aviasales

10. #10 · 1 connection · 6h 17m · separate tickets

    12:05 PM → 4:22 PM

    96%

    connections made

    86%

    arrive on time

    12:05 PM HOU → 12:55 PM PHX2h 50m

    Southwest 1066 · also flew as 2593

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

    82% on time · 0.4% cancel

    Connect in PHX · 2h 09m · 97% chance to make it · separate tickets: collect and re-check bags, re-clear security; if you miss it the second airline does not have to rebook you

    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

    Flight 1: find Southwest 1066 (HOU–PHX) ↗Flight 2: find Envoy 4143 (PHX–ONT) ↗Book each flight separately 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.