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ATIS Alerts Smart Flight Search

Find the flight least likely to be delayed

Beta

We rank real flight numbers by how often they flew and arrived on time over the last 12 months, adjusted for your travel month and departure time, then check nearby airports and calmer connections. US airlines and airports.

MDW → TUS

Chicago to Tucson: 344 nonstop flights a year

On time (12 months)

80%

Cancelled

0.6%

avg delay 10 min

Best time to leave

Before 9 AM

87% on time vs 50% after 9 PM

Most reliable airline

Southwest

80% chance on time

Check MDW to TUS fares

Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Best trips

4 nonstop, 36 with 1 connection. Best overall weighs the chance you arrive on time as booked, connection odds, travel time and separate tickets.

  1. Best overall#1 · Nonstop · 3h 45m

    8:40 PM → 10:25 PM

    85%

    arrive on time

    8:40 PM MDW → 10:25 PM TUS3h 45m

    Southwest 972

    Boeing 737-700 or 737-800 · 3–21 yrs old
    85% on time · 0.5% cancel
    Find Southwest 972 fares Opens this date on Aviasales

  2. #2 · Nonstop · 3h 50m

    3:25 PM → 5:15 PM

    83%

    arrive on time

    3:25 PM MDW → 5:15 PM TUS3h 50m

    Southwest 1188

    Boeing 737 MAX 8 or 737-700 · 3–19 yrs old
    84% on time · 0.5% cancel
    Find Southwest 1188 fares Opens this date on Aviasales

  3. #3 · Nonstop · 3h 45m

    4:35 PM → 6:20 PM

    78%

    arrive on time

    4:35 PM MDW → 6:20 PM TUS3h 45m

    Southwest 1421

    Boeing 737 MAX 8 or 737-800 · 2–14 yrs old
    79% on time · 0.5% cancel
    Find Southwest 1421 fares Opens this date on Aviasales

  4. #4 · Nonstop · 3h 50m

    4:05 PM → 5:55 PM

    75%

    arrive on time

    4:05 PM MDW → 5:55 PM TUS3h 50m

    Southwest 199

    Boeing 737-800 or 737 MAX 8 · 1–12 yrs old
    75% on time · 0.5% cancel
    Find Southwest 199 fares Opens this date on Aviasales

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

    6:55 AM → 11:20 AM

    95%

    connections made

    81%

    arrive on time

    6:55 AM MDW → 8:45 AM PHX3h 50m

    Southwest 4631

    Boeing 737 MAX 8 or 737-800 · 3–14 yrs old
    88% on time · 1.3% cancel
    Connect in PHX · 1h 45m · 96% chance to make it · same ticket: the airline rebooks you if you miss it

    10:30 AM PHX → 11:20 AM TUS50m

    Southwest 1552 · also flew as 2590

    Boeing 737-700 · 15–22 yrs old
    85% on time · 0.4% cancel
    Find this Southwest trip Look for Southwest 4631 + Southwest 1552 on Aviasales

  6. #6 · 1 connection · 7h 53m · separate tickets

    5:25 AM → 11:18 AM

    98%

    connections made

    90%

    arrive on time

    5:25 AM MDW → 7:10 AM PHX3h 45m

    Southwest 3340

    Boeing 737 MAX 8 or 737-800 · 2–11 yrs old
    91% on time · 1.2% cancel
    Connect in PHX · 3h 14m · 99% 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

    10:24 AM PHX → 11:18 AM TUS54m

    Envoy 4049 · sold as American Eagle

    Embraer E175 · 4–11 yrs old
    92% on time · 0.4% cancel
    Flight 1: find Southwest 3340 (MDW–PHX) Flight 2: find Envoy 4049 (PHX–TUS) Book each flight separately on Aviasales

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

    5:25 AM → 11:20 AM

    98%

    connections made

    83%

    arrive on time

    5:25 AM MDW → 7:10 AM PHX3h 45m

    Southwest 3340

    Boeing 737 MAX 8 or 737-800 · 2–11 yrs old
    91% on time · 1.2% cancel
    Connect in PHX · 3h 20m · 99% chance to make it · same ticket: the airline rebooks you if you miss it

    10:30 AM PHX → 11:20 AM TUS50m

    Southwest 1552 · also flew as 2590

    Boeing 737-700 · 15–22 yrs old
    85% on time · 0.4% cancel
    Find this Southwest trip Look for Southwest 3340 + Southwest 1552 on Aviasales

  8. #8 · 1 connection · 5h 45m · one ticket (Southwest)

    6:00 AM → 9:45 AM

    88%

    connections made

    76%

    arrive on time

    6:00 AM MDW → 7:40 AM DEN2h 40m

    Southwest 3262 · also flew as 2135

    Boeing 737 MAX 8 or 737-700 · 1–22 yrs old
    92% on time · 1.2% cancel
    Connect in DEN · 1h 05m · 90% chance to make it · same ticket: the airline rebooks you if you miss it

    8:45 AM DEN → 9:45 AM TUS2h 00m

    Southwest 2775

    Boeing 737-700 · 10–23 yrs old
    86% on time · 0.4% cancel
    Find this Southwest trip Look for Southwest 3262 + Southwest 2775 on Aviasales

  9. #9 · 1 connection · 8h 13m · separate tickets

    5:05 AM → 11:18 AM

    96%

    connections made

    89%

    arrive on time

    5:05 AM MDW → 7:00 AM PHX3h 55m

    Southwest 1522

    Boeing 737 MAX 8 · 3–10 yrs old
    92% on time · 1.9% cancel
    Connect in PHX · 3h 24m · 99% 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

    10:24 AM PHX → 11:18 AM TUS54m

    Envoy 4049 · sold as American Eagle

    Embraer E175 · 4–11 yrs old
    92% on time · 0.4% cancel
    Flight 1: find Southwest 1522 (MDW–PHX) Flight 2: find Envoy 4049 (PHX–TUS) Book each flight separately on Aviasales

  10. #10 · 1 connection · 8h 03m · separate tickets

    10:00 AM → 3:57 PM

    96%

    connections made

    88%

    arrive on time

    10:00 AM MDW → 12:30 PM SLC3h 30m

    Southwest 416 · also flew as 744

    Boeing 737 MAX 8 or 737-800 · 1–22 yrs old
    74% on time · 1.2% cancel
    Connect in SLC · 2h 30m · 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

    3:00 PM SLC → 3:57 PM TUS2h 03m

    SkyWest 3717 · sold as United Express, Delta Connection, American Eagle or Alaska

    Embraer E175 · 4–10 yrs old
    92% on time · 0.3% cancel
    Flight 1: find Southwest 416 (MDW–SLC) Flight 2: find SkyWest 3717 (SLC–TUS) 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.

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines80%

    344 flights · 80% on time as flown · 0.6% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • Before 9 AM87%

    112 flights · avg delay 7 min

  • Noon to 3 PM84%

    68 flights · avg delay 7 min

  • 3 to 6 PM76%

    72 flights · avg delay 11 min

  • 6 to 9 PM82%

    38 flights · avg delay 11 min

  • After 9 PM50%

    31 flights · avg delay 22 min

Best day: Tuesday (85%). Worst: Wednesday (74%).

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure