EWR to STL flight delays
Newark, NJ (EWR) St. Louis, MO (STL) · 872 miles
1,074 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
84.58%
Arrived on time
Within 15 minutes of schedule
5.03%
Cancelled
Share of scheduled flights
69 min
When late, late by
Average across delayed arrivals
11 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. Republic Airways arrived on time 14.8 points more often than United Airlines over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
Cancellation, not delay, is the risk worth pricing here: 5.03% of scheduled flights never operated. A late flight still gets you there. A cancelled one leaves you rebooking, and on a route with few daily departures that can mean losing a day.
The season swings this route hard. In April it ran 27.5 points more punctual than in December — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
Flights from Newark to St. Louis keep to schedule more reliably than most. On a route this punctual the day you fly matters more than the airline you pick.
Which airline should you fly on this route?
Over January 2025 – August 2026, Republic Airways arrived on time most often on EWR to STL. United Airlines was late most often. Flights ran closest to schedule in April and worst in December.
Every airline on EWR to STL
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Republic Airways | 946 | 86.42% | 5.6% | 69 min | C |
| United Airlines | 128 | 71.65% | 0.78% | 71 min | D |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
STL to EWR St. Louis back to Newark 81.33% on time DOther routes from Newark
Common questions
Are flights from Newark to St. Louis usually delayed?
84.58% of flights on the EWR to STL route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airline is most on time from Newark to St. Louis?
Republic Airways, at 86.42% on time across 946 flights. The least punctual on the route was United Airlines at 71.65%.
How often are EWR to STL flights cancelled?
5.03% of scheduled flights did not operate — about 50 in every thousand. That is high enough that cancellation, not delay, is the risk worth planning around.
What is the best month to fly Newark to St. Louis?
April, when 96.5% of flights arrived on time. The worst was December at 69%.
When EWR to STL flights are late, how late are they?
About 69 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on EWR to STL during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →