Cheap Flights from Kansas City (MCI) to St. Louis (STL)

You can find one-way and return flights from MCI to STL with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when MCI to STL ticket fares go up or down.

The cheapest months to fly from MCI to STL are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.

Only one airline offers direct flights from Kansas City, MO (MCI-Kansas City Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.). Southwest Airlines operates 20 direct flights from Kansas City, MO (MCI-Kansas City Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) every week, giving you a convenient option for this route.

To find a cheap flight from Kansas City, MO (MCI) to St. Louis, MO (STL), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.

The best airline to fly with from Kansas City, MO (MCI-Kansas City Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will differ from traveler to traveler. If you like to fly early, Southwest Airlines offers early morning flights. If price is the most important factor, Southwest Airlines typically offers the lowest fares. Southwest Airlines offers the most daily flights from Kansas City, MO (MCI-Kansas City Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.

The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.

You'll find around 3 nonstop flights per day from Kansas City, MO (MCI-Kansas City Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.). For even more choices, look at flights that include layovers, as there are approximately 87 connecting flights per day. Some common connection points include O'Hare Intl. (ORD), Hartsfield-Jackson Atlanta Intl. (ATL), and Denver Intl. (DEN).

The earliest flight from Kansas City Intl. (MCI) to Lambert-St. Louis Intl. (STL) typically departs around 5:00 AM. This service is offered by American Airlines and Southern Airways. This is a seasonal service active in June. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.

You'll typically find the most flights from Kansas City Intl. (MCI) to Lambert-St. Louis Intl. (STL) on a Tuesday, with around 69 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, American Airlines, and Delta. Tuesday offers notably more flight options compared to other days of the week, so if you're looking for the most choices, that's a great day to consider flying.

The most popular departure times for flights from Kansas City, MO (MCI-Kansas City Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) are between 12pm and 3pm. Many major carriers, including Southwest Airlines, American Airlines and United, offer flights during this window. Many travelers prefer this because it allows for a mid-day departure, giving you time in the morning before your flight and an afternoon arrival in St. Louis.

A direct flight from Kansas City, MO (MCI-Kansas City Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) typically takes around 1 hour. This route covers a distance of approximately 381 kilometres. If you opt for a one-stop flight, your travel time will be significantly longer, usually around 6 hours 18 minutes. Flights with two or more stops will extend your journey even further, to about 9 hours 18 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic.

Yes, you can fly business class or first class between MCI and STL. You can fly business class with Frontier Airlines.

First class cabins are available on Alaska Airlines, Delta, American Airlines, and United.

It's easy to earn miles on a Kansas City, MO (MCI-Kansas City Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

If you're planning to travel to St. Louis from Kansas City Intl. (MCI), you can fly directly into Lambert-St. Louis Intl. (STL). Some flights may connect through major hubs like Love Field (DAL), William P. Hobby (HOU), or Midway Intl. (MDW) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Typically, booking a last minute flight from Kansas City, MO (MCI-Kansas City Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.

Securing a Kansas City, MO (MCI-Kansas City Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.

If you booked your Kansas City, MO (MCI) to St. Louis, MO (STL) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.