Route
JAX → STL
Jacksonville International Airport St. Louis Lambert International Airport
753 miles
Return route STL → JAX →
How punctual is this route?
- On-time arrivals
- 88.5%
- Less than 15 minutes late
- Cancelled
- 0.6%
- Of scheduled flights
- Average delay when late
- 65 min
- Flights arriving 15+ minutes late
- Flights tracked
- 491
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 60%
- Airline (crew, maintenance, cleaning) 25%
- Extreme weather 10%
- Air traffic control & airport 4%
- Security 1%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 94.6% | 56 |
| October 2025 | 91.2% | 57 |
| November 2025 | 94.4% | 54 |
| December 2025 | 87.9% | 58 |
| January 2026 | 88.9% | 18 |
| February 2026 | 100.0% | 19 |
| March 2026 | 90.3% | 33 |
| April 2026 | 91.7% | 37 |
| May 2026 | 92.7% | 41 |
| June 2026 | 76.3% | 38 |
| July 2026 | 65.8% | 39 |
| August 2026 | 87.8% | 41 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Southwest Airlines | 491 | 88.5% | 0.6% | 65 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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