Routes/Chicago, IL to St. Louis, MO

Chicago, IL to St. Louis, MO

Average one-way fare in 2026 Q1: $266 · 258 nonstop miles · 539 passengers per day.

2026 Q1 fare$266

2025 Q1 fare$234

Change+$32

Passengers/day539

Distance258 mi

The average fare a year earlier (2025 Q1) was $234. The change is $32 higher (13.8%).

The largest carrier on this route in 2026 Q1 was Southwest with 38% of passengers. The lowest-fare carrier was Southwest with 38% of passengers, at an average fare of $247.

All routes from Chicago, IL · 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	570	$207	Southwest	46%	Southwest
2024 Q2	855	$200	Southwest	47%	Southwest
2024 Q3	776	$211	Southwest	46%	Southwest
2024 Q4	749	$222	Southwest	46%	Southwest
2025 Q1	583	$234	Southwest	41%	Southwest
2025 Q2	748	$233	Southwest	45%	Southwest
2025 Q3	742	$231	Southwest	45%	Southwest
2025 Q4	663	$238	Southwest	41%	Southwest
2026 Q1	539	$266	Southwest	38%	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 30977 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.