ATIS Alerts Smart Flight Search
Find the flight least likely to be delayed
BetaWe 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.
GSP → MIA
Greenville/Greer/Spartanburg to Miami: 725 nonstop flights a year
On time (12 months)
80%
Cancelled
1.4%
avg delay 13 min
Best time to leave
Before 9 AM
89% on time vs 68% 6 to 9 PM
Most reliable airline
Envoy
79% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Best trips
4 nonstop, 32 with 1 connection. Best overall weighs the chance you arrive on time as booked, connection odds, travel time and separate tickets.
Best overall#1 · Nonstop · 1h 56m
6:00 AM → 7:56 AM
88%
arrive on time
89% on time · 1.1% cancel6:00 AM GSP → 7:56 AM MIA1h 56m
Envoy 3806 · sold as American Eagle
Embraer E175 · 4–11 yrs oldFind 6:00 AM flight fares Opens this date on Aviasales#2 · Nonstop · 1h 59m
6:45 PM → 8:44 PM
80%
arrive on time
80% on time · 0.9% cancel6:45 PM GSP → 8:44 PM MIA1h 59m
Envoy 3507 · sold as American Eagle
Embraer E175 · 4–11 yrs oldFind 6:45 PM flight fares Opens this date on Aviasales#3 · Nonstop · 1h 57m
7:26 PM → 9:23 PM
71%
arrive on time
73% on time · 1.5% cancel7:26 PM GSP → 9:23 PM MIA1h 57m
Envoy 3762 · sold as American Eagle
Embraer E175 · 5–11 yrs oldFind 7:26 PM flight fares Opens this date on Aviasales#4 · 1 connection · 5h 48m · one ticket (American)
5:21 AM → 11:09 AM
96%
connections made
81%
arrive on time
96% on time · 1.3% cancel5:21 AM GSP → 6:25 AM CLT1h 04m
PSA 5381 · sold as American Eagle
Bombardier CRJ900 · 7–12 yrs oldConnect in CLT · 2h 32m · 99% chance to make it · same ticket: the airline rebooks you if you miss it84% on time · 1.4% cancel8:57 AM CLT → 11:09 AM MIA2h 12m
American 1186 · also flew as 1002
Boeing 737-800 · 9–27 yrs oldFind this American trip Look for PSA 5381 + American 1186 on Aviasales#5 · Nonstop · 1h 55m
8:15 PM → 10:10 PM
67%
arrive on time
68% on time · 1.1% cancel8:15 PM GSP → 10:10 PM MIA1h 55m
Envoy 3558 · sold as American Eagle
Embraer E175 · 5–11 yrs oldFind 8:15 PM flight fares Opens this date on Aviasales#6 · 1 connection · 5h 49m · one ticket (American)
5:20 AM → 11:09 AM
94%
connections made
80%
arrive on time
95% on time · 2.0% cancel5:20 AM GSP → 6:16 AM CLT56m
American 1490
Airbus A319 · 20–27 yrs oldConnect in CLT · 2h 41m · 98% chance to make it · same ticket: the airline rebooks you if you miss it84% on time · 1.4% cancel8:57 AM CLT → 11:09 AM MIA2h 12m
American 1186 · also flew as 1002
Boeing 737-800 · 9–27 yrs oldFind this American trip Look for American 1490 + American 1186 on Aviasales#7 · 1 connection · 4h 52m · one ticket (Delta)
5:40 AM → 10:36 AM
94%
connections made
75%
arrive on time
96% on time · 2.4% cancel5:40 AM GSP → 6:43 AM ATL1h 02m
Delta 3028
Boeing 737-900ER or 717 · 9–26 yrs oldConnect in ATL · 1h 52m · 98% chance to make it · same ticket: the airline rebooks you if you miss it80% on time · 1.6% cancel8:35 AM ATL → 10:36 AM MIA1h 58m
Delta 1510
Boeing 767-300ER or 767-400ER · 8–29 yrs oldFind this Delta trip Look for Delta 3028 + Delta 1510 on Aviasales#8 · 1 connection · 6h 21m · one ticket (American)
5:21 AM → 11:42 AM
96%
connections made
79%
arrive on time
96% on time · 1.3% cancel5:21 AM GSP → 6:25 AM CLT1h 04m
PSA 5381 · sold as American Eagle
Bombardier CRJ900 · 7–12 yrs oldConnect in CLT · 3h 01m · 99% chance to make it · same ticket: the airline rebooks you if you miss it82% on time · 1.5% cancel9:26 AM CLT → 11:42 AM MIA2h 16m
American 1436
Airbus A321neo · 2–6 yrs oldFind this American trip Look for PSA 5381 + American 1436 on Aviasales#9 · 1 connection · 6h 09m · one ticket (American)
5:00 AM → 11:09 AM
91%
connections made
77%
arrive on time
89% on time · 1.9% cancel5:00 AM GSP → 6:15 AM CLT1h 15m
PSA 5107 · sold as American Eagle
Bombardier CRJ900 · 7–12 yrs oldConnect in CLT · 2h 42m · 94% chance to make it · same ticket: the airline rebooks you if you miss it84% on time · 1.4% cancel8:57 AM CLT → 11:09 AM MIA2h 12m
American 1186 · also flew as 1002
Boeing 737-800 · 9–27 yrs oldFind this American trip Look for PSA 5107 + American 1186 on Aviasales#10 · 1 connection · 6h 22m · one ticket (American)
5:20 AM → 11:42 AM
95%
connections made
78%
arrive on time
95% on time · 2.0% cancel5:20 AM GSP → 6:16 AM CLT56m
American 1490
Airbus A319 · 20–27 yrs oldConnect in CLT · 3h 10m · 98% chance to make it · same ticket: the airline rebooks you if you miss it82% on time · 1.5% cancel9:26 AM CLT → 11:42 AM MIA2h 16m
American 1436
Airbus A321neo · 2–6 yrs oldFind this American trip Look for American 1490 + American 1436 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.
- Envoy Air (sold as American Eagle)79%
704 flights · 80% on time as flown · 1.2% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM89%
364 flights · avg delay 11 min
- 9 AM to noon84%
44 flights · avg delay 6 min
- 3 to 6 PM75%
44 flights · avg delay 18 min
- 6 to 9 PM68%
263 flights · avg delay 16 min
Best day: Tuesday (87%). Worst: Saturday (81%).
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