St. Louis (STL) to Newark (EWR): On-Time Performance
Data through July 2026
St. Louis (STL) to Newark (EWR) has an unusually high scrub rate — 4.5% of scheduled departures never left the gate, a cancellation rate several times the national figure. When flights do go, 79% land on time, no worse than the national average of 78%. Republic Airways has been the safer pick, arriving on time 82% of the time.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 19 min
- completed flights
- Cancelled
- 4.5%
- Flights/day
- 2.9
- last 12 months
- Duration
- 2h 33m
- scheduled
- Distance
- 872 mi
Best airline from STL to EWR
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 82% | 15 min | 5.3% | 1,633 |
| United Airlines | 70% | 30 min | 2.2% | 503 |
Monthly on-time trend
Best time to fly from STL to EWR
Aim for departures around 6 a.m. (93% on-time); avoid 4 p.m. departures (58%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 78% | 20 min |
| Tuesdaybest | 83% | 12 min |
| Wednesday | 82% | 16 min |
| Thursday | 77% | 21 min |
| Friday | 80% | 18 min |
| Saturday | 82% | 22 min |
| Sunday | 74% | 23 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft32%
- Airline operations14%
- National airspace system52%
- Weather3%
Frequently asked questions
- How often are flights from STL to EWR delayed?
- 21% of STL–EWR flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 19 minutes.
- Which airline is most reliable from STL to EWR?
- Republic Airways has the best on-time record on this route at 82%, based on 1,633 flights. 2 airlines flew STL–EWR frequently enough to compare in this period.
- What is the best time of day to fly from STL to EWR?
- Departures around 6 a.m. have the best record (93% on-time), while departures around 4 p.m. have the worst (58%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from STL to EWR?
- The scheduled STL–EWR flight time averages 2h 33m over 872 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are STL to EWR flights cancelled?
- 4.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07 — several times the typical US rate, so consider earlier departures or backup options.
- What is the worst month to fly from STL to EWR?
- October 2025 was the roughest month in this dataset, with only 60% of arrivals on time. The best was May 2026 at 92%. If your dates are flexible, that 32-point gap is worth planning around.
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Based on 2,136 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.