Route on-time record
STL to EWR: most on-time flights and the best time to fly
St Louis (St. Louis Lambert International Airport) to Newark (Newark Liberty International Airport). 1,060 nonstop flights in Jun 2025 to May 2026, 81% arrived within 15 minutes and 4.8% were cancelled. The most reliable flight number was Republic 3621 at 6:15 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
STL → EWR
St Louis to Newark: 1,060 nonstop flights a year
On time (12 months)
81%
Cancelled
4.8%
avg delay 19 min
Best time to leave
Before 9 AM
90% on time vs 70% 3 to 6 PM
Most reliable airline
Republic
79% chance on time
Lowest nonstop fare seen in the next two months: $249 (United 3427 on 2026-10-27). 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 3621 · sold as American Eagle, Delta Connection or United Express
6:15 AM → 9:51 AM2h 36m nonstop
Local times, typical schedule. Last flown 2026-05-20.
85%
chance on time
- On time (history)
- 92%
- Cancelled
- 1.9%
- Avg arrival delay
- 3 min
- Arrived on time 92% of the time (52 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 70%).
- Short track record (52 flights), so its score leans on the airline's record at this hour.
Limited track record · 52 flights
Find 6:15 AM flight fares Opens this date on Aviasales#2 · Republic 3477 · sold as American Eagle, Delta Connection or United Express
4:48 PM → 8:25 PM2h 37m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 70% on time; Before 9 AM: 90%).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find 4:48 PM flight fares Opens this date on Aviasales#3 · Republic 3425 · sold as American Eagle, Delta Connection or United Express
7:00 AM → 10:29 AM2h 29m nonstop
Local times, typical schedule. Last flown 2026-03-28.
83%
chance on time
- On time (history)
- 87%
- Cancelled
- 2.5%
- Avg arrival delay
- 7 min
- Arrived on time 87% of the time (39 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 70%).
- Short track record (39 flights), so its score leans on the airline's record at this hour.
Limited track record · 39 flights
Find 7:00 AM flight fares Opens this date on Aviasales#4 · Republic 3573 · sold as American Eagle, Delta Connection or United Express
11:37 AM → 3:13 PM2h 36m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
- On time (history)
- 91%
- Cancelled
- 4.8%
- Avg arrival delay
- 8 min
- Arrived on time 91% of the time (139 flights, Jun 2025 to May 2026).
- Cancelled 4.8% of the time (7 of 146).
- Lands inside EWR's trouble window: 65% of its 259 ground stops and delay programs started between 1 PM and 7 PM.
Moderate track record · 139 flights
Find 11:37 AM flight fares Opens this date on Aviasales#5 · United 2104
6:00 AM → 9:29 AM2h 29m nonstop
Local times, typical schedule. Last flown 2026-05-31.
80%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 90% of the time (10 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 70%).
- Short track record (10 flights), so its score leans on the airline's record at this hour.
Limited track record · 10 flights
Find United 2104 fares Opens this date on Aviasales#6 · Republic 3502 · sold as American Eagle, Delta Connection or United Express
5:41 PM → 9:12 PM2h 31m nonstop
Local times, typical schedule. Last flown 2026-05-20.
76%
chance on time
- On time (history)
- 86%
- Cancelled
- 4.8%
- Avg arrival delay
- 10 min
- Arrived on time 86% of the time (58 flights, Jun 2025 to May 2026).
- Cancelled 4.8% of the time (3 of 62).
- Leaves in this route's least on-time window (3 to 6 PM: 70% on time; Before 9 AM: 90%).
- Short track record (58 flights), so its score leans on the airline's record at this hour.
Limited track record · 58 flights
Find 5:41 PM flight fares Opens this date on Aviasales#7 · Republic 3606 · sold as American Eagle, Delta Connection or United Express
5:24 PM → 8:59 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-04-29.
74%
chance on time
- On time (history)
- 86%
- Cancelled
- 0.0%
- Avg arrival delay
- 17 min
- Arrived on time 86% of the time (28 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 70% on time; Before 9 AM: 90%).
- Short track record (28 flights), so its score leans on the airline's record at this hour.
Limited track record · 28 flights
Find 5:24 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%
938 flights · 84% on time as flown · 5.4% cancel
- United Airlines71%
122 flights · 64% on time as flown · 2.7% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM90%
379 flights · avg delay 7 min
- 9 AM to noon82%
323 flights · avg delay 16 min
- Noon to 3 PM80%
36 flights · avg delay 57 min
- 3 to 6 PM70%
301 flights · avg delay 30 min
Best day: Saturday (84%). Worst: Sunday (76%).
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 aircraft43%
- Air traffic control and airport volume42%
- Airline (crew, maintenance, boarding)12%
- Severe weather3%
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
STL to EWR questions
- What time of day is best to fly STL to EWR?
- Before 9 AM: 90% of flights arrived on time, against 70% for departures 3 to 6 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from STL to EWR?
- Republic, with a season-adjusted 79% chance of operating and arriving on time over 938 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 STL to EWR?
- July (70% on time); the best was March (87%), 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 STL
- EWR to STL (return)
- STL to ATL 85%
- STL to DEN 75%
- STL to ORD 71%
- STL to LGA 75%
- STL to MCO 78%
- STL to DCA 73%
- STL to DFW 74%
- STL to PHX 76%
- STL to LAS 79%
- STL to DAL 77%
- STL to DTW 83%
- STL to MSP 80%
Live status: FAA delays and ground stops