Newark (EWR) to St. Louis (STL): On-Time Performance
Data through May 2026
The biggest risk when flying EWR to STL isn't a late arrival — it's not departing at all. 4.5% of scheduled flights on this route were cancelled, several times the typical US rate. When flights do go, 81% land on time, no worse than the national average of 78%. Republic Airways has been the safer pick, arriving on time 85% of the time.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 4.5%
- Flights/day
- 2.9
- last 12 months
- Duration
- 2h 53m
- scheduled
- Distance
- 872 mi
Best airline from EWR to STL
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 85% | 10 min | 5.5% | 1,544 |
| United Airlines | 69% | 29 min | 1.4% | 504 |
Monthly on-time trend
Best time to fly from EWR to STL
Aim for departures around 9 a.m. (92% on-time); avoid 8 p.m. departures (45%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 17 min |
| Tuesdaybest | 84% | 8 min |
| Wednesday | 83% | 14 min |
| Thursday | 73% | 18 min |
| Friday | 83% | 14 min |
| Saturday | 79% | 17 min |
| Sunday | 82% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft49%
- Airline operations26%
- National airspace system20%
- Weather5%
Frequently asked questions
- How often are flights from EWR to STL delayed?
- 19% of EWR–STL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 15 minutes.
- Which airline is most reliable from EWR to STL?
- Republic Airways has the best on-time record on this route at 85%, based on 1,544 flights. 2 airlines flew EWR–STL frequently enough to compare in this period.
- What is the best time of day to fly from EWR to STL?
- Departures around 9 a.m. have the best record (92% on-time), while departures around 8 p.m. have the worst (45%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from EWR to STL?
- The scheduled EWR–STL flight time averages 2h 53m over 872 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are EWR to STL flights cancelled?
- 4.5% of scheduled flights on this route were cancelled between 2024-06 and 2026-05 — several times the typical US rate, so consider earlier departures or backup options.
- What is the worst month to fly from EWR to STL?
- August 2024 was the roughest month in this dataset, with only 62% of arrivals on time. The best was April 2026 at 97%. If your dates are flexible, that 35-point gap is worth planning around.
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Based on 2,048 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.