Route on-time record
EWR to GSP: most on-time flights and the best time to fly
Newark (Newark Liberty International Airport) to Greenville/Greer/Spartanburg (Greenville-Spartanburg International Airport). 743 nonstop flights in Jun 2025 to May 2026, 84% arrived within 15 minutes and 5.1% were cancelled. The most reliable flight number was Republic 3433 at 9:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
EWR → GSP
Newark to Greenville/Greer/Spartanburg: 743 nonstop flights a year
On time (12 months)
84%
Cancelled
5.1%
avg delay 14 min
Best time to leave
9 AM to noon
96% on time vs 72% after 9 PM
Most reliable airline
Republic
79% chance on time
Lowest nonstop fare seen in the next two months: $282 (United 3546 on 2026-11-09). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Republic 3433 · sold as American Eagle, Delta Connection or United Express
9:00 AM → 11:14 AM2h 14m nonstop
Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as Republic 3652; its record covers all of them.
92%
chance on time
- On time (history)
- 99%
- Cancelled
- 1.4%
- Avg arrival delay
- 1 min
- Arrived on time 99% of the time (71 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (9 AM to noon: 96% on time; After 9 PM: 72%).
- Departs outside EWR's trouble window (1 PM to 7 PM, when 65% of its 259 ground stops and delay programs started).
Moderate track record · 71 flights
Find 9:00 AM flight fares Opens this date on Aviasales#2 · Republic 3493 · sold as American Eagle, Delta Connection or United Express
8:47 PM → 11:05 PM2h 18m nonstop
Local times, typical schedule. Last flown 2026-05-19.
85%
chance on time
- On time (history)
- 100%
- Cancelled
- 4.8%
- Avg arrival delay
- 1 min
- Arrived on time 100% of the time (20 flights, Jun 2025 to May 2026).
- Departs outside EWR's trouble window (1 PM to 7 PM, when 65% of its 259 ground stops and delay programs started).
- Short track record (20 flights), so its score leans on the airline's record at this hour.
Limited track record · 20 flights
Find 8:47 PM flight fares Opens this date on Aviasales#3 · Republic 3632 · sold as American Eagle, Delta Connection or United Express
3:00 PM → 5:10 PM2h 10m nonstop
Local times, typical schedule. Last flown 2026-05-20.
83%
chance on time
- On time (history)
- 95%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 95% of the time (21 flights, Jun 2025 to May 2026).
- Departs inside EWR's trouble window: 65% of its 259 ground stops and delay programs started between 1 PM and 7 PM.
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find 3:00 PM flight fares Opens this date on Aviasales#4 · Republic 3604 · sold as American Eagle, Delta Connection or United Express
8:30 AM → 10:37 AM2h 07m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 82% of the time (11 flights, Jun 2025 to May 2026).
- Departs outside EWR's trouble window (1 PM to 7 PM, when 65% of its 259 ground stops and delay programs started).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find 8:30 AM flight fares Opens this date on Aviasales#5 · Republic 3584 · sold as American Eagle, Delta Connection or United Express
4:59 PM → 7:08 PM2h 09m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 91% of the time (11 flights, Jun 2025 to May 2026).
- Departs inside EWR's trouble window: 65% of its 259 ground stops and delay programs started between 1 PM and 7 PM.
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find 4:59 PM flight fares Opens this date on Aviasales#6 · Republic 3574 · sold as American Eagle, Delta Connection or United Express
9:44 PM → 11:59 PM2h 15m nonstop
Local times, typical schedule. Last flown 2026-03-28.
74%
chance on time
- On time (history)
- 85%
- Cancelled
- 11.1%
- Avg arrival delay
- 12 min
- Arrived on time 85% of the time (40 flights, Jun 2025 to May 2026).
- Cancelled 11.1% of the time (5 of 45).
- Leaves in this route's least on-time window (After 9 PM: 72% on time; 9 AM to noon: 96%).
- Departs outside EWR's trouble window (1 PM to 7 PM, when 65% of its 259 ground stops and delay programs started).
Limited track record · 40 flights
Find 9:44 PM flight fares Opens this date on Aviasales#7 · Republic 3606 · sold as American Eagle, Delta Connection or United Express
9:15 PM → 11:29 PM2h 14m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
- On time (history)
- 80%
- Cancelled
- 0.0%
- Avg arrival delay
- 23 min
- Arrived on time 80% of the time (10 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (After 9 PM: 72% on time; 9 AM to noon: 96%).
- Departs outside EWR's trouble window (1 PM to 7 PM, when 65% of its 259 ground stops and delay programs started).
- Short track record (10 flights), so its score leans on the airline's record at this hour.
Limited track record · 10 flights
Find 9:15 PM flight fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Republic Airways (sold as American Eagle, Delta Connection or United Express)79%
743 flights · 84% on time as flown · 5.1% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM92%
173 flights · avg delay 4 min
- 9 AM to noon96%
132 flights · avg delay 3 min
- Noon to 3 PM78%
90 flights · avg delay 20 min
- 3 to 6 PM78%
83 flights · avg delay 26 min
- 6 to 9 PM88%
45 flights · avg delay 14 min
- After 9 PM72%
220 flights · avg delay 21 min
Best day: Saturday (88%). Worst: Friday (80%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft45%
- Airline (crew, maintenance, boarding)27%
- Air traffic control and airport volume20%
- Severe weather7%
Share of delay minutes by the cause airlines report to the US DOT.
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
EWR to GSP questions
- What time of day is best to fly EWR to GSP?
- 9 AM to noon: 96% of flights arrived on time, against 72% for departures after 9 PM.
- Which airline is most on time from EWR to GSP?
- Republic, with a season-adjusted 79% chance of operating and arriving on time over 743 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on EWR to GSP?
- July (64% on time); the best was February (95%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from EWR
- GSP to EWR (return)
- EWR to MCO 76%
- EWR to ATL 77%
- EWR to ORD 71%
- EWR to LAX 72%
- EWR to FLL 75%
- EWR to SFO 71%
- EWR to MIA 77%
- EWR to BOS 71%
- EWR to CLT 80%
- EWR to IAH 79%
- EWR to DTW 79%
- EWR to PBI 77%
Live status: FAA delays and ground stops