Route guide · 110 miles
Cheap Flights from St. Louis to Decatur
STL → DEC · Nonstop 0h 43m · Live round-trip fares
Looking for cheap flights from St. Louis to Decatur? You're in the right place. Airfare Deal tracks live fares on this 110-mile route around the clock. As a rule of thumb, booking 2–4 weeks ahead lands the best prices — and a free fare alert means you never have to keep refreshing the page.
Live fares for STL → DEC are updating. Use the search below for real-time prices.
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Updated daily
Flight time
0h 43m
Nonstop, typical
Distance
110 mi
STL → DEC
Book ahead
2–4 weeks
Best window, typically
Nonstop airlines
0
Nonstop flights from St. Louis to Decatur
Nonstop service links St. Louis and Decatur directly — flights are flown by US carriers and their regional partners. Expect roughly 0h 43m in the air. If a nonstop is what you want, don't wait too long: booking 2–4 weeks ahead is when these seats are priced most kindly.
Booking insights: St. Louis → Decatur
- Distance: 110 miles · nonstop flight time: 0h 43m.
- Rule of thumb for this route: the sweet spot is usually 2–4 weeks before departure.
- Midweek departures (Tue–Thu) are consistently cheaper than weekend flights.
- Set a free Airfare Deal alert instead of checking daily — the best fares can sell out in hours.
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Flying from St. Louis to Decatur: what you need to know
The flight
St. Louis to Decatur is a short hop — 110 miles, about 0h 43m gate to gate on a nonstop. You'll spend almost as long taxiing and boarding as you will in the air, so the real time-saver on this route is picking flight times that dodge rush hour at both ends.
Airlines on this route
fly this route nonstop. That matters more than it sounds: the cheapest fare on one carrier is rarely the same product as the cheapest on another. Checked-bag fees, free seat selection and change rules all differ, so compare the full trip cost before you pick a winner. See our airline guides for exactly what each carrier charges — then send an enquiry and we'll confirm the all-in price for your dates.
Leaving from St. Louis (STL)
Plan to be at the airport two hours before a domestic departure — ninety minutes can work at smaller airports outside peak times, but security lines are the one variable you can't control. If you're checking a bag, add time rather than cutting it close. Our St. Louis airport guide covers terminals, parking and ground transport so you can plan the trip to the airport, not just the flight.
Arriving in Decatur (DEC)
Before you land, know how you're getting from the airport to where you're staying — it's the part of the trip people forget to plan. The Decatur airport guide lays out your ground options, from transit and shuttles to rideshares and rental cars. Flying back the other way? Check Decatur to St. Louis fares — prices on the return direction often move on a different rhythm.
When to book
For a trip of 110 miles, booking 2–4 weeks ahead typically lands you in the sweet spot. Leave it to the final two weeks and prices usually climb as the cheapest seats sell out. If your dates are flexible, midweek departures are where the lower fares hide on most domestic routes.
Good to know before you go
- If you're traveling with only a carry-on, you can skip the bag-drop line entirely with mobile check-in.
- Download the airline's app before you fly; gate changes and delays show up there first.
- Nonstop time on this route is about 0h 43m — a one-stop itinerary needs to be a lot cheaper to be worth the extra hours.
- Tuesday and Wednesday departures are typically the cheapest days on domestic routes.
- Screenshot your fare before you enquire — prices move, and a saved fare helps our team match or beat it.
St. Louis to Decatur flight FAQs
How long is the flight from STL to DEC?
A nonstop from STL to DEC clocks in at around 0h 43m for the 110-mile trip. If you're connecting, budget an extra 2–4 hours depending on where you stop.
Are there nonstop flights from St. Louis to Decatur?
Yes — nonstop flights operate from STL to DEC, alongside one-stop options via major hubs. Nonstops are usually cheapest when booked 2–4 weeks ahead of departure.
What is the cheapest month to fly from St. Louis to Decatur?
Fares from St. Louis to Decatur tend to ease outside the peak summer and holiday rush — the late-summer and early-fall shoulder weeks are usually kinder on the wallet. Set a free Airfare Deal alert and we'll flag the dips for your dates.
How much are last minute flights from STL to DEC?
Last-minute flights from STL to DEC (booked within 7 days of departure) typically cost noticeably more than fares booked 2–4 weeks out. Booking early is the smarter move.
What is a good round-trip deal from St. Louis to Decatur?
A good deal is anything at or below the recent fares shown above. Set a free Airfare Deal alert and we'll ping you the moment fares drop.
Which airlines fly from St. Louis to Decatur?
This route is covered by major US carriers and their regional partners. Run your dates through the live search below to compare them side by side.
How early should I get to St. Louis airport for this flight?
Plan on two hours before departure for a domestic flight — ninety minutes can work at smaller airports outside peak times. If you're checking a bag, earlier is better; the bag-drop line, not the flight, is what runs late.
Do the cheapest fares on this route include a checked bag?
Usually not. Basic economy fares on most airlines include a carry-on but charge extra for checked bags, and seat selection can cost more too. Add up the real total before comparing — a slightly higher regular fare sometimes works out cheaper. Our team confirms the full breakdown with you before you pay.
More cheap flights from St. Louis
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