Reliable Flight Search results
Best trips
3 nonstop, 15 with 1 connection · ranked by overall best · published legroom for 18 of 18
Our best overall pick
90% chance you arrive on time · nonstop · 31 in legroom · planes about 20 years old · 1h 40m
Top pick#1 · Nonstop · 1h 40m
8:30 AM → 10:10 AM
71
score
price
live on Aviasales
90%
arrive on time
91% on time · 1.2% cancel8:30 AM BWI → 10:10 AM GSP1h 40m
Southwest 1958
Boeing 737-700 · 16–22 yrs oldLegroom 31–36 in · 15.5–17 in wide · Economy (all seating types)Find Southwest 1958 fares Opens this date on Aviasales#2 · Nonstop · 1h 30m
11:40 AM → 1:10 PM
69
score
price
live on Aviasales
88%
arrive on time
89% on time · 1.0% cancel11:40 AM BWI → 1:10 PM GSP1h 30m
Southwest 1350
Boeing 737-700 · 15–23 yrs oldLegroom 31–36 in · 15.5–17.8 in wide · Economy (all seating types)Find Southwest 1350 fares Opens this date on Aviasales#3 · Nonstop · 1h 35m
7:20 PM → 8:55 PM
49
score
price
live on Aviasales
74%
arrive on time
74% on time · 0.9% cancel7:20 PM BWI → 8:55 PM GSP1h 35m
Southwest 1143
Boeing 737-700 · 17–23 yrs oldLegroom 31–36 in · 15.5–17 in wide · Economy (all seating types)Find Southwest 1143 fares Opens this date on Aviasales#4 · 1 connection · 6h 07m · one ticket (American)
6:12 AM → 12:19 PM
46
score
price
live on Aviasales
96%
connections made
87%
arrive on time
91% on time · 2.0% cancel6:12 AM BWI → 7:49 AM CLT1h 37m
American 2670
Boeing 737-800 · 9–26 yrs oldLegroom 30–31 in · 16.3–18.7 in wide · Main CabinConnect in CLT · 3h 31m · 99% chance to make it · same ticket: the airline rebooks you if you miss it91% on time · 0.8% cancel11:20 AM CLT → 12:19 PM GSP59m
Envoy 3633 · sold as American Eagle
Embraer E175 · 3–11 yrs oldLegroom 30 in · 18.2–19.3 in wide · Main CabinFind this American trip Look for American 2670 + Envoy 3633 on Aviasales#5 · 1 connection · 7h 14m · one ticket (American)
5:05 AM → 12:19 PM
43
score
price
live on Aviasales
97%
connections made
88%
arrive on time
96% on time · 1.7% cancel5:05 AM BWI → 6:36 AM CLT1h 31m
American 1708
Boeing 737-800 · 8–27 yrs oldLegroom 30 in · 16.6–18.7 in wide · Main CabinConnect in CLT · 4h 44m · 99% chance to make it · same ticket: the airline rebooks you if you miss it91% on time · 0.8% cancel11:20 AM CLT → 12:19 PM GSP59m
Envoy 3633 · sold as American Eagle
Embraer E175 · 3–11 yrs oldLegroom 30 in · 18.2–19.3 in wide · Main CabinFind this American trip Look for American 1708 + Envoy 3633 on Aviasales#6 · 1 connection · 5h 04m · one ticket (American)
1:55 PM → 6:59 PM
38
score
price
live on Aviasales
91%
connections made
80%
arrive on time
86% on time · 2.2% cancel1:55 PM BWI → 3:32 PM CLT1h 37m
American 846
Boeing 737-800 · 11–26 yrs oldLegroom 30 in · 16.6–17.8 in wide · Main CabinConnect in CLT · 2h 28m · 94% chance to make it · same ticket: the airline rebooks you if you miss it88% on time · 0.9% cancel6:00 PM CLT → 6:59 PM GSP59m
Envoy 3422 · sold as American Eagle
Embraer E175 · 6–11 yrs oldLegroom 30 in · 18.2–19.3 in wide · Main CabinFind this American trip Look for American 846 + Envoy 3422 on Aviasales#7 · 1 connection · 7h 12m · separate tickets
4:45 PM → 11:57 PM
26
score
price
live on Aviasales
96%
connections made
84%
arrive on time
67% on time · 1.2% cancel4:45 PM BWI → 6:20 PM CLT1h 35m
Southwest 3591
Boeing 737-700 or 737 MAX 8 · 2–22 yrs oldLegroom 31–36 in · 15.5–17.8 in wide · Economy (all seating types)Connect in CLT · 4h 40m · 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 you87% on time · 1.9% cancel11:00 PM CLT → 11:57 PM GSP57m
American 1317
Airbus A319 · 20–27 yrs oldLegroom 30–32 in · 16.5–18.7 in wide · Main CabinFlight 1: find Southwest 3591 (BWI–CLT) Flight 2: find American 1317 (CLT–GSP) Book each flight separately on Aviasales#8 · 1 connection · 3h 47m · one ticket (American)
8:10 PM → 11:57 PM
26
score
price
live on Aviasales
77%
connections made
68%
arrive on time
72% on time · 1.5% cancel8:10 PM BWI → 9:55 PM CLT1h 45m
American 1637 · also flew as 3170
Airbus A319 · 9–27 yrs oldLegroom 30 in · 16.6–18.7 in wide · Main CabinConnect in CLT · 1h 05m · 80% chance to make it · same ticket: the airline rebooks you if you miss it87% on time · 1.9% cancel11:00 PM CLT → 11:57 PM GSP57m
American 1317
Airbus A319 · 20–27 yrs oldLegroom 30–32 in · 16.5–18.7 in wide · Main CabinFind this American trip Look for American 1637 + American 1317 on Aviasales#9 · 1 connection · 7h 07m · separate tickets
4:45 PM → 11:52 PM
20
score
price
live on Aviasales
96%
connections made
64%
arrive on time
67% on time · 1.2% cancel4:45 PM BWI → 6:20 PM CLT1h 35m
Southwest 3591
Boeing 737-700 or 737 MAX 8 · 2–22 yrs oldLegroom 31–36 in · 15.5–17.8 in wide · Economy (all seating types)Connect in CLT · 4h 35m · 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 you66% on time · 1.6% cancel10:55 PM CLT → 11:52 PM GSP57m
PSA 5504 · sold as American Eagle
Bombardier CRJ900 · 9–12 yrs oldLegroom 31 in · 16.6–17.3 in wide · Main CabinFlight 1: find Southwest 3591 (BWI–CLT) Flight 2: find PSA 5504 (CLT–GSP) Book each flight separately on Aviasales#10 · 1 connection · 4h 50m · separate tickets
4:45 PM → 9:35 PM
20
score
price
live on Aviasales
88%
connections made
53%
arrive on time
67% on time · 1.2% cancel4:45 PM BWI → 6:20 PM CLT1h 35m
Southwest 3591
Boeing 737-700 or 737 MAX 8 · 2–22 yrs oldLegroom 31–36 in · 15.5–17.8 in wide · Economy (all seating types)Connect in CLT · 2h 16m · 90% 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 you61% on time · 1.6% cancel8:36 PM CLT → 9:35 PM GSP59m
PSA 5524 · sold as American Eagle · also flew as 5124
Bombardier CRJ900 · 7–12 yrs oldLegroom 31 in · 16.6–17.3 in wide · Main CabinFlight 1: find Southwest 3591 (BWI–CLT) Flight 2: find PSA 5524 (CLT–GSP) 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. 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.
BWI → GSP
Baltimore to Greenville/Greer/Spartanburg: 720 nonstop flights a year
On time (12 months)
82%
Cancelled
1.3%
avg delay 15 min
Best time to leave
9 AM to noon
93% on time vs 72% 6 to 9 PM
Most reliable airline
Southwest
81% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines81%
720 flights · 82% on time as flown · 1.3% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM92%
274 flights · avg delay 4 min
- 9 AM to noon93%
91 flights · avg delay 6 min
- 6 to 9 PM72%
329 flights · avg delay 24 min
Best day: Tuesday (82%). Worst: Monday (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