Routes/San Diego, CA to St. Louis, MO
San Diego, CA to St. Louis, MO
Average one-way fare in 2026 Q1: $305 · 1557 nonstop miles · 343 passengers per day.
2026 Q1 fare$305
2025 Q1 fare$289
Change+$15
Passengers/day343
Distance1557 mi
The average fare a year earlier (2025 Q1) was $289. The change is $15 higher (5.3%).
The largest carrier on this route in 2026 Q1 was Southwest with 75% of passengers. The lowest-fare carrier was American with 13% of passengers, at an average fare of $273.
All routes from San Diego, CA · All routes from St. Louis, MO
All quarters on this route
| Quarter | Passengers/day | Avg. fare | Largest carrier | Largest share | Lowest-fare carrier |
|---|---|---|---|---|---|
| 2024 Q1 | 306 | $299 | Southwest | 66% | American |
| 2024 Q2 | 455 | $269 | Southwest | 69% | American |
| 2024 Q3 | 437 | $272 | Southwest | 73% | Frontier |
| 2024 Q4 | 393 | $295 | Southwest | 68% | American |
| 2025 Q1 | 305 | $289 | Southwest | 74% | American |
| 2025 Q2 | 379 | $287 | Southwest | 71% | American |
| 2025 Q3 | 376 | $289 | Southwest | 73% | American |
| 2025 Q4 | 382 | $282 | Southwest | 79% | Frontier |
| 2026 Q1 | 343 | $305 | Southwest | 75% | American |