Both Missouri Airports Rank Above the National Average

Missouri's two major airports are both above the national average for domestic airfares—a pattern that reflects the mid-size market dynamics of both St. Louis and Kansas City. Only In Your State analyzed recently released Bureau of Transportation Statistics data, and neither hub stands out as a bargain for departing travelers.

St. Louis Lambert International Airport (STL) averaged $408.09 per domestic ticket in 2025, ranking 63rd out of 100 airports nationally. That's $21.09 above the national average of $387.

Kansas City International Airport (MCI) averaged $422.15, ranking 77th nationally—$35.15 above the national average and $14.06 more per ticket than St. Louis.

The Missouri Airport Landscape

St. Louis Lambert ranked 34th nationally by passenger volume—a mid-tier airport with solid carrier access but fares that run above average. Kansas City International ranked 37th by passenger volume—similar traffic but higher fares, largely driven by limited regional competition and carrier concentration across key routes.

Beyond the baseline ticket prices, market structure plays a significant role in what local travelers end up paying. Because neither airport operates as a mega-hub for legacy carriers like Delta or United, non-stop flight options to secondary markets are fewer, leading to higher price points on mid-distance routes compared to larger Midwestern transit centers.

For Missouri travelers, Chicago's airports offer the clearest lower-cost alternative in the region. Chicago Midway (MDW) averaged $312.18—$96 cheaper than St. Louis and $110 cheaper than Kansas City. O'Hare (ORD) at $374.28 is also cheaper than both Missouri airports. However, convenience remains a trade-off: the drive from St. Louis to Chicago takes roughly 5 hours, while driving from Kansas City takes closer to 8 hours.

Making Missouri Departures Work

For most Missouri travelers, driving out of state for a cheaper fare isn't practical on every trip. However, for a major family vacation or long-distance international travel where savings multiply across multiple tickets, crunching the numbers on nearby hubs can yield substantial savings even after accounting for gas and parking.

Within Missouri, St. Louis's $408.09 is the better deal, ranking 14 spots higher nationally than Kansas City. If both cities are accessible, the data favors Lambert for departure.

Understanding seasonal fare fluctuations and staying flexible with travel dates can also help cushion the blow of above-average ticket prices. Monitoring price trends standardly reveals sweet spots for booking, particularly when traveling during off-peak weekdays or mid-flight departure windows.

This data reflects 2025 averages from the Department of Transportation, released in May 2026. Knowing how to find cheap flights and booking early are the most reliable tools for managing above-average fares from Missouri's airports.

To get the most from your next departure, explore how to find cheap flights and unexpected ways to cut travel costs to help stretch your budget further once you've already got a head start.

To see how every major airport in the country compares—plus the full methodology behind the data—explore the complete U.S. Airport Cost Rankings for 2026.