Title: Cheap Flights from St. Louis to Decatur (STL to DEC) - Expedia.co.uk ![Decatur featuring a park](https://images.trvl-media.com/place/992/18fcc117-ebea-48e6-9f7a-bd739838461d.jpg?impolicy=fcrop&w=1200&h=500&q=medium) Photo by Decatur Area CVB ![](https://images.trvl-media.com/place/992/18fcc117-ebea-48e6-9f7a-bd739838461d.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from St. Louis (STL) to Decatur (DEC) - [Return](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Lambert-St. Louis International Airport (STL) to Decatur, IL (DEC) - ![British Airways](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_BA.svg) British Airways [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:dec,departure:16/11/2025TANYT&leg2=from:dec,to:stl,departure:23/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"BA"}}]) - ![easyJet](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_U2.svg) easyJet [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:dec,departure:16/11/2025TANYT&leg2=from:dec,to:stl,departure:23/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"U2"}}]) - ![Lufthansa](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_LH.svg) Lufthansa [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:dec,departure:16/11/2025TANYT&leg2=from:dec,to:stl,departure:23/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LH"}}]) - ![Ryanair](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_FR.svg) Ryanair [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:dec,departure:16/11/2025TANYT&leg2=from:dec,to:stl,departure:23/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"FR"}}]) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:dec,departure:16/11/2025TANYT&leg2=from:dec,to:stl,departure:23/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![Jet2](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_LS.svg) Jet2 [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:dec,departure:16/11/2025TANYT&leg2=from:dec,to:stl,departure:23/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LS"}}]) - ![Swiss International Air Lines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_LX.svg) Swiss International Air Lines [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:dec,departure:16/11/2025TANYT&leg2=from:dec,to:stl,departure:23/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LX"}}]) - ![notification illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* - ![deals illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 25% on select hotels after you book a flight\* - ![trophy illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.co.uk/login) ## Frequently asked questions ### How much is a flight from St. Louis Lambert International Airport to Decatur Airport? > Pack your bags, because round-trip flights from STL to Decatur Airport (DEC) start from . That's based on airfares available within the last 7 days on Expedia for flights departing within the next year. Prices can move quickly, so book today to score the best deal. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from St. Louis Lambert International Airport to Decatur Airport (DEC)? > This differs between air carriers, as each has its own terms and conditions. Head to the [Customer Service Portal](https://www.expedia.co.uk/service/?langid=1033), where there are instructions on how to cancel online. ### How do I find cheap flights from St. Louis Lambert International Airport to Decatur Airport that have flexible change policies? > Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for STL to Decatur Airport flights, you'll see a "no change fees" filter for you to select. ### How far is the flight from STL to Decatur Airport? > You can forget about a movie marathon on this flight — it's only 180 kilometres from St. Louis to Decatur. Find your seat, buckle up and you'll be there in no time. ### Which airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to DEC? > If you want to travel straight from St. Louis Lambert International Airport to Decatur Airport, you'll need to book a flight with one or more stops. Unfortunately, there are no airlines that fly directly between these airports. ### Are Lambert-St. Louis Intl. Airport (STL) to Decatur Airport (DEC) flight tickets cheaper when they're purchased at the last minute? > Booking your trip from Lambert Field to Decatur Airport last minute could be your ticket to a fantastic deal. However, you might miss out on a flight altogether! If you'd rather err on the side of caution, book well ahead of your departure date. In fact, Expedia has some of the biggest bargains as far ahead as 12 months in advance. If your preferred carrier hasn't released tickets yet, check back frequently as deals are updated all the time on Expedia. ## Travel information | Origin airport | Lambert-St. Louis Intl. | | --- | --- | | Destination airport | Decatur | | Distance | 175 km | ## Book with confidence ### Compare flights from St. Louis to Decatur easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from St. Louis to Decatur. Operating between them flights per day, airlines cover the route. And fly direct, getting you to Decatur in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Lambert-St. Louis Intl. to Decatur.   To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights.  Grab a great deal on your flight from Lambert-St. Louis Intl. (STL) to Decatur (DEC) The easiest way to view the best deals on flights from St. Louis to Decatur today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Lambert-St. Louis Intl. to Decatur start at just and range up to .   To find an even better deal, try   - being flexible on your dates – midweek flights can be cheaper - looking for other airports near St. Louis and Decatur - booking your flight during , the cheapest month on this route - varying your flight times – early morning and late at night are sometimes cheaper  Why you should book your St. Louis to Decatur flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Lambert-St. Louis Intl. to Decatur for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.   Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. 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