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Cheap flights from St. Louis to Decatur from $354

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from St. Louis to Decatur

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:34 pm - 9:35 amSTL  Lambert-St Louis-DEC Decatur Arpt
16h 01m1 stop Chicago O'Hare Intl
United Airlines Logo
6:57 pm - 9:40 pmDEC  Decatur Arpt-STL Lambert-St Louis
26h 43m1 stop Chicago O'Hare Intl
$354United Airlines
Sat, Oct 31 - Wed, Nov 4
United Airlines Logo
1:27 pm - 6:43 pmSTL  Lambert-St Louis-DEC Decatur Arpt
5h 16m1 stop Chicago O'Hare Intl
United Airlines Logo
9:12 am - 3:43 pmDEC  Decatur Arpt-STL Lambert-St Louis
6h 31m1 stop Chicago O'Hare Intl
$490United Airlines
Sat, Oct 17 - Wed, Oct 21
United Airlines Logo
1:29 pm - 6:43 pmSTL  Lambert-St Louis-DEC Decatur Arpt
5h 14m1 stop Chicago O'Hare Intl
United Airlines Logo
7:18 pm - 7:41 pmDEC  Decatur Arpt-STL Lambert-St Louis
24h 23m1 stop Chicago O'Hare Intl
$566United Airlines
Fri, Oct 16 - Tue, Oct 20

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United Airlines flights from St. Louis to Decatur, Illinois

Our best United Airlines deals on St. Louis to Decatur, Illinois flight tickets
United Airlines
Oct 31
STL5:34 pmLambert-St Louis
16h 01m
1 stop
DEC9:35 amDecatur Arpt
Nov 4
DEC6:57 pmDecatur Arpt
26h 43m
1 stop
STL9:40 pmLambert-St Louis
$354
United Airlines
Oct 17
STL1:27 pmLambert-St Louis
5h 16m
1 stop
DEC6:43 pmDecatur Arpt
Oct 21
DEC9:12 amDecatur Arpt
6h 31m
1 stop
STL3:43 pmLambert-St Louis
$490
United Airlines
Oct 16
STL1:29 pmLambert-St Louis
5h 14m
1 stop
DEC6:43 pmDecatur Arpt
Oct 20
DEC7:18 pmDecatur Arpt
24h 23m
1 stop
STL7:41 pmLambert-St Louis
$566

momondo Fare Finder

 
Use the filters below to find and compare flights from St. Louis to Decatur, Illinois that are best for you.

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Route

Depart

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Price

Cheapest round-trip

St. LouisDecatur

STL Lambert-St Louis - DEC Decatur Arpt

STLDEC

Lambert-St Louis

Sat 10/31

5:34 pm-9:35 am

1 stop16h 01m

Decatur Arpt

Wed 11/4

6:57 pm-9:40 pm

1 stop26h 43m

$354
Quickest round-trip

St. LouisDecatur

STL Lambert-St Louis - DEC Decatur Arpt

STLDEC

Lambert-St Louis

Sat 10/17

1:27 pm-6:43 pm

1 stop5h 16m

Decatur Arpt

Wed 10/21

9:12 am-3:43 pm

1 stop6h 31m

$490

St. LouisDecatur

STL Lambert-St Louis - DEC Decatur Arpt

STLDEC

Lambert-St Louis

Fri 10/16

1:29 pm-6:43 pm

1 stop5h 14m

Decatur Arpt

Tue 10/20

7:18 pm-7:41 pm

1 stop24h 23m

$566

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from St. Louis to Decatur, Illinois

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Decatur, Illinois according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Decatur, Illinois (STL to DEC) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Decatur, Illinois

Best Price Found

$354

Fastest flight time

16h 01m

Direct flights

None
The best flight deal from St. Louis to Decatur, Illinois found on momondo in the last 72 hours is $354
The fastest flight from St. Louis to Decatur, Illinois takes 16h 01m
There are no direct flights from St. Louis to Decatur, Illinois. There are no popular flight routes from St. Louis to Decatur, Illinois.
Search flight deals

Frequently asked questions about flying from St. Louis to Decatur, Illinois

  • How far is Lambert-St Louis to Decatur Arpt by plane?

    The straight-line distance from Lambert-St Louis to Decatur Arpt is 106.9 mi. In terms of flight time, this usually takes a little over 16h 01m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Decatur Arpt Airport?

    Prices for flights from Lambert-St Louis Airport to Decatur Arpt Airport were last updated today.

  • How old do you have to be to fly from Lambert-St Louis Airport to Decatur Arpt Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Decatur Arpt Airport.

  • What documentation or ID do you need to fly to Decatur Arpt Airport?

    The necessary travel and health documents for your Decatur Arpt Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from St. Louis to Decatur, Illinois

  • How do I get Price Alerts for flights from St. Louis to Decatur, Illinois?

    Search flight deals from St. Louis to Decatur, Illinois. While viewing offers you’ll have the option to create a Price Alert.

  • How can I save money on flights from St. Louis to Decatur, Illinois with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Traveling to a place near Decatur?

Book flights to Decatur if you plan to visit one of these locations
Effingham
Mattoon
Forsyth

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Decatur?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Decatur from St. Louis.

Can I find flights from St. Louis to Decatur with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Decatur from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Decatur?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Decatur.

I’m not ready to book a flight from St. Louis to Decatur right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Decatur, momondo offers a useful price alert feature which will track prices for flights to Decatur from St. Louis and alert you when they change.

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