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Reliable Flight Search

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The insider way to pick a flight: on-time records, the odds each connection is made, legroom and the age of the planes that actually fly the route. Things airline sites and the big booking sites don’t show you. US airlines and airports.

Find me the most reliable flights fromtoonreturning(optional)

MIA → TYS

Miami to Knoxville/Maryville: 478 nonstop flights a year

On time (12 months)

75%

Cancelled

0.6%

avg delay 19 min

Best time to leave

Noon to 3 PM

79% on time vs 57% 3 to 6 PM

Most reliable airline

Envoy

81% chance on time

Check MIA to TYS fares

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

Best trips

2 nonstop, 30 with 1 connection · ranked by overall best · published legroom for 32 of 32

  1. Top pick#1 · Nonstop · 2h 14m

    9:45 PM → 11:59 PM

    93

    score

    price

    live on Aviasales

    84%

    arrive on time

    9:45 PM MIA → 11:59 PM TYS2h 14m

    Envoy 4061 · sold as American Eagle

    Embraer E175 · 2–11 yrs oldLegroom 30 in · 18.2–19.3 in wide · Main Cabin
    84% on time · 0.4% cancel
    Find 9:45 PM flight fares Opens this date on Aviasales

  2. #2 · 1 connection · 5h 00m · one ticket (Delta)

    8:10 AM → 1:10 PM

    65

    score

    price

    live on Aviasales

    92%

    connections made

    82%

    arrive on time

    8:10 AM MIA → 10:15 AM ATL2h 05m

    Delta 1261

    Boeing 757-200 · 25–31 yrs oldLegroom 30–33 in · 17.2–18 in wide · Delta Main
    90% on time · 1.2% cancel
    Connect in ATL · 2h 00m · 96% chance to make it · same ticket: the airline rebooks you if you miss it

    12:15 PM ATL → 1:10 PM TYS55m

    Delta 724

    Boeing 717 · 21–26 yrs oldLegroom 30–31 in · 18.1 in wide · Delta Main
    89% on time · 2.6% cancel
    Find this Delta trip Look for Delta 1261 + Delta 724 on Aviasales

  3. #3 · 1 connection · 6h 05m · one ticket (Delta)

    7:05 AM → 1:10 PM

    65

    score

    price

    live on Aviasales

    94%

    connections made

    83%

    arrive on time

    7:05 AM MIA → 9:10 AM ATL2h 05m

    Delta 1211

    Boeing 757-200 or Airbus A321 · 8–28 yrs oldLegroom 30–33 in · 17.2–18 in wide · Delta Main
    91% on time · 1.6% cancel
    Connect in ATL · 3h 05m · 98% chance to make it · same ticket: the airline rebooks you if you miss it

    12:15 PM ATL → 1:10 PM TYS55m

    Delta 724

    Boeing 717 · 21–26 yrs oldLegroom 30–31 in · 18.1 in wide · Delta Main
    89% on time · 2.6% cancel
    Find this Delta trip Look for Delta 1211 + Delta 724 on Aviasales

  4. #4 · 1 connection · 4h 11m · one ticket (Delta)

    7:05 AM → 11:17 AM

    64

    score

    price

    live on Aviasales

    89%

    connections made

    77%

    arrive on time

    7:05 AM MIA → 9:10 AM ATL2h 05m

    Delta 1211

    Boeing 757-200 or Airbus A321 · 8–28 yrs oldLegroom 30–33 in · 17.2–18 in wide · Delta Main
    91% on time · 1.6% cancel
    Connect in ATL · 1h 05m · 92% chance to make it · same ticket: the airline rebooks you if you miss it

    10:15 AM ATL → 11:17 AM TYS1h 01m

    Delta 1743

    Boeing 717 · 21–27 yrs oldLegroom 30–31 in · 18.1 in wide · Delta Main
    87% on time · 1.7% cancel
    Find this Delta trip Look for Delta 1211 + Delta 1743 on Aviasales

  5. #5 · 1 connection · 5h 16m · one ticket (Delta)

    6:00 AM → 11:17 AM

    63

    score

    price

    live on Aviasales

    93%

    connections made

    81%

    arrive on time

    6:00 AM MIA → 8:07 AM ATL2h 07m

    Delta 1249

    Boeing 757-200 · 25–33 yrs oldLegroom 30–33 in · 17.2–18.1 in wide · Delta Main
    92% on time · 1.9% cancel
    Connect in ATL · 2h 08m · 96% chance to make it · same ticket: the airline rebooks you if you miss it

    10:15 AM ATL → 11:17 AM TYS1h 01m

    Delta 1743

    Boeing 717 · 21–27 yrs oldLegroom 30–31 in · 18.1 in wide · Delta Main
    87% on time · 1.7% cancel
    Find this Delta trip Look for Delta 1249 + Delta 1743 on Aviasales

  6. #6 · 1 connection · 7h 10m · one ticket (Delta)

    6:00 AM → 1:10 PM

    59

    score

    price

    live on Aviasales

    94%

    connections made

    83%

    arrive on time

    6:00 AM MIA → 8:07 AM ATL2h 07m

    Delta 1249

    Boeing 757-200 · 25–33 yrs oldLegroom 30–33 in · 17.2–18.1 in wide · Delta Main
    92% on time · 1.9% cancel
    Connect in ATL · 4h 08m · 98% chance to make it · same ticket: the airline rebooks you if you miss it

    12:15 PM ATL → 1:10 PM TYS55m

    Delta 724

    Boeing 717 · 21–26 yrs oldLegroom 30–31 in · 18.1 in wide · Delta Main
    89% on time · 2.6% cancel
    Find this Delta trip Look for Delta 1249 + Delta 724 on Aviasales

  7. #7 · 1 connection · 5h 26m · one ticket (Delta)

    10:26 AM → 3:52 PM

    57

    score

    price

    live on Aviasales

    91%

    connections made

    74%

    arrive on time

    10:26 AM MIA → 12:35 PM ATL2h 09m

    Delta 2836

    Boeing 757-200 or Airbus A321 · 7–30 yrs oldLegroom 30–33 in · 17.2–18 in wide · Delta Main
    83% on time · 1.4% cancel
    Connect in ATL · 2h 24m · 95% chance to make it · same ticket: the airline rebooks you if you miss it

    2:59 PM ATL → 3:52 PM TYS53m

    Delta 2496

    Boeing 717 or 737-800 · 21–27 yrs oldLegroom 30–31 in · 17.3–18.1 in wide · Delta Main
    81% on time · 2.6% cancel
    Find this Delta trip Look for Delta 2836 + Delta 2496 on Aviasales

  8. #8 · 1 connection · 5h 10m · separate tickets

    8:00 AM → 1:10 PM

    57

    score

    price

    live on Aviasales

    88%

    connections made

    79%

    arrive on time

    8:00 AM MIA → 10:04 AM ATL2h 04m

    American 1799

    Boeing 737-800 or Airbus A319 · 11–26 yrs oldLegroom 30 in · 16.6–18.7 in wide · Main Cabin
    88% on time · 0.9% cancel
    Connect in ATL · 2h 11m · 92% 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

    12:15 PM ATL → 1:10 PM TYS55m

    Delta 724

    Boeing 717 · 21–26 yrs oldLegroom 30–31 in · 18.1 in wide · Delta Main
    89% on time · 2.6% cancel
    Flight 1: find American 1799 (MIA–ATL) Flight 2: find Delta 724 (ATL–TYS) Book each flight separately on Aviasales

  9. #9 · 1 connection · 5h 30m · separate tickets

    7:40 AM → 1:10 PM

    57

    score

    price

    live on Aviasales

    89%

    connections made

    79%

    arrive on time

    7:40 AM MIA → 9:41 AM ATL2h 01m

    American 512

    Boeing 737-800 · 10–28 yrs oldLegroom 30 in · 16.6–18.7 in wide · Main Cabin
    84% on time · 1.0% cancel
    Connect in ATL · 2h 34m · 93% 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

    12:15 PM ATL → 1:10 PM TYS55m

    Delta 724

    Boeing 717 · 21–26 yrs oldLegroom 30–31 in · 18.1 in wide · Delta Main
    89% on time · 2.6% cancel
    Flight 1: find American 512 (MIA–ATL) Flight 2: find Delta 724 (ATL–TYS) Book each flight separately on Aviasales

  10. #10 · 1 connection · 5h 46m · one ticket (Delta)

    6:15 PM → 11:57 PM

    57

    score

    price

    live on Aviasales

    87%

    connections made

    67%

    arrive on time

    6:15 PM MIA → 8:34 PM ATL2h 20m

    Delta 1386

    Airbus A321 or Boeing 757-200 · 8–27 yrs oldLegroom 30–33 in · 17.2–18 in wide · Delta Main · covers 94% of recent planes
    58% on time · 1.5% cancel
    Connect in ATL · 2h 31m · 91% chance to make it · same ticket: the airline rebooks you if you miss it

    11:05 PM ATL → 11:57 PM TYS55m

    Delta 3072

    Boeing 737-900ER or 737-800 · 8–26 yrs oldLegroom 30–32 in · 17.3–18.1 in wide · Delta Main
    77% on time · 2.6% cancel
    Find this Delta trip Look for Delta 1386 + Delta 3072 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. Legroom is the seat pitch the airline or a seat-map source publishes for that aircraft and cabin; we never estimate it, and seat maps change, so check the airline’s seat map when you book.

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Envoy Air (sold as American Eagle)81%

    390 flights · 84% on time as flown · 0.5% cancel

  • American Airlines60%

    74 flights · 38% on time as flown · 0.9% cancel

On time by departure time

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

  • Noon to 3 PM79%

    83 flights · avg delay 13 min

  • 3 to 6 PM57%

    30 flights · avg delay 31 min

  • After 9 PM76%

    356 flights · avg delay 19 min

Best day: Tuesday (78%). Worst: Sunday (69%).

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