Routes/Philadelphia, PA to St. Louis, MO

Philadelphia, PA to St. Louis, MO

Average one-way fare in 2026 Q1: $315 · 814 nonstop miles · 297 passengers per day.

2026 Q1 fare$315
2025 Q1 fare$313
Change+$1
Passengers/day297
Distance814 mi

The average fare a year earlier (2025 Q1) was $313. The change is $1 higher (0.4%).

The largest carrier on this route in 2026 Q1 was American with 50% of passengers. The lowest-fare carrier was Southwest with 44% of passengers, at an average fare of $300.

All routes from Philadelphia, PA · All routes from St. Louis, MO

All quarters on this route

QuarterPassengers/dayAvg. fareLargest carrierLargest shareLowest-fare carrier
2024 Q1312$250Southwest52%Southwest
2024 Q2565$220American52%American
2024 Q3613$191American57%Southwest
2024 Q4463$256Southwest56%Southwest
2025 Q1285$313American48%Southwest
2025 Q2459$291Southwest49%Southwest
2025 Q3446$261American52%Southwest
2025 Q4424$279Southwest52%Southwest
2026 Q1297$315American50%Southwest

Source: U.S. Department of Transportation, Consumer Airfare Report Table 1, 2026 Q1. Figures are average one-way fares paid, including taxes and fees, for the quarter shown. Record: city markets 34100 and 31123; U.S. Department of Transportation, Domestic Airline Consumer Airfare Report, Table 1: top 1,000 contiguous-state city-pair markets (average one-way fare, passengers per day, largest carrier, lowest-fare carrier). Fetched 2026-09-27T00:40:04Z. Source data.