BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
LGASTL

New York, NY (LGA) to St. Louis, MO (STL) flight delay odds

Historically, 72.4% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 2,644 flights.

HISTORICAL ROUTE SIGNALHigher disruption
72.4%arrived on time
16.5%30+ min late
4.0%cancelled
2,644scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.7%all scheduled flights
120+ minutes late3.2%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+8.3 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Early morning51089.4%5.5%1.6%
Late morning57678.0%10.8%3.5%
Afternoon87270.6%18.5%3.0%
Evening66156.9%26.9%7.7%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday40970.2%15.2%7.3%
Tuesday42074.3%15.2%3.8%
Wednesday41075.6%16.3%3.4%
Thursday40672.9%18.2%3.4%
Friday40773.5%16.5%2.2%
Saturday21775.1%15.7%1.4%
Sunday37565.9%17.9%5.3%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,39071.2%17.0%3.0%
Republic Airways1,22673.3%16.2%5.2%
SkyWest Airlines2889.3%0.0%0.0%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 202522559.1%24.9%8.0%
August 202524083.3%9.2%1.2%
September 202520482.4%12.3%1.0%
October 202519966.3%19.1%2.5%
November 202518967.7%22.8%1.6%
December 202522960.7%25.3%3.9%
January 202621580.0%9.8%6.5%
February 202620278.7%7.4%7.4%
March 202625562.4%21.6%9.0%
April 202624981.9%12.0%0.4%
May 202623374.2%15.5%1.7%
June 202620472.1%17.6%4.4%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline22.8%
Late aircraft49.4%
National airspace23.6%
Weather3.7%
Security0.5%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.