Route
STL → JAX
St. Louis Lambert International Airport Jacksonville International Airport
753 miles
Return route JAX → STL →
How punctual is this route?
- On-time arrivals
- 77.5%
- Less than 15 minutes late
- Cancelled
- 0.2%
- Of scheduled flights
- Average delay when late
- 59 min
- Flights arriving 15+ minutes late
- Flights tracked
- 491
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 52%
- Airline (crew, maintenance, cleaning) 36%
- Air traffic control & airport 11%
- Security 1%
- Extreme weather 1%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 80.4% | 56 |
| October 2025 | 75.4% | 57 |
| November 2025 | 87.0% | 54 |
| December 2025 | 82.8% | 58 |
| January 2026 | 66.7% | 18 |
| February 2026 | 89.5% | 19 |
| March 2026 | 71.9% | 33 |
| April 2026 | 78.4% | 37 |
| May 2026 | 75.6% | 41 |
| June 2026 | 84.2% | 38 |
| July 2026 | 59.0% | 39 |
| August 2026 | 71.8% | 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 | 77.5% | 0.2% | 59 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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