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Cheap flights from Ontario to Decatur from $343

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Decatur departing on 2/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Decatur

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:30 pm - 8:52 am
YOW
-
DEC
14h 22m2 stops
United Airlines Logo
9:50 am - 9:56 pm
DEC
-
YOW
11h 06m2 stops
$633United Airlines
Thu, Feb 19 - Sun, Feb 22
United Airlines Logo
10:25 am - 6:02 pm
YOW
-
DEC
32h 37m2 stops
United Airlines Logo
7:20 pm - 2:27 pm
DEC
-
YOW
18h 07m2 stops
$635United Airlines
Tue, Apr 21 - Sat, Apr 25
United Airlines Logo
6:00 am - 6:02 pm
YOW
-
DEC
13h 02m2 stops
United Airlines Logo
7:20 pm - 2:27 pm
DEC
-
YOW
18h 07m2 stops
$637United Airlines
Tue, Apr 21 - Sat, Apr 25
United Airlines Logo
6:00 am - 6:02 pm
YOW
-
DEC
13h 02m3 stops
United Airlines Logo
7:20 pm - 10:03 am
DEC
-
YOW
13h 43m2 stops
$669United Airlines
Tue, Apr 21 - Sat, Apr 25
United Airlines Logo
6:25 am - 6:02 pm
YOW
-
DEC
12h 37m1 stop
United Airlines Logo
7:20 pm - 10:03 am
DEC
-
YOW
13h 43m2 stops
$671United Airlines
Tue, Apr 21 - Sat, Apr 25
United Airlines Logo
6:00 am - 6:02 pm
YOW
-
DEC
13h 02m3 stops
United Airlines Logo
7:20 pm - 2:27 pm
DEC
-
YOW
18h 07m2 stops
$686United Airlines
Tue, Apr 21 - Sat, Apr 25

United Airlines flights from Region of Ontario to Decatur, Illinois

Our best United Airlines deals on Region of Ontario to Decatur, Illinois flight tickets
United Airlines
Feb 19
YOW7:30 pmOttawa
14h 22m
2 stops
DEC8:52 amDecatur Arpt
Feb 22
DEC9:50 amDecatur Arpt
11h 06m
2 stops
YOW9:56 pmOttawa
$633
United Airlines
Apr 21
YOW10:25 amOttawa
32h 37m
2 stops
DEC6:02 pmDecatur Arpt
Apr 25
DEC7:20 pmDecatur Arpt
18h 07m
2 stops
YOW2:27 pmOttawa
$635
United Airlines
Apr 21
YOW6:00 amOttawa
13h 02m
2 stops
DEC6:02 pmDecatur Arpt
Apr 25
DEC7:20 pmDecatur Arpt
18h 07m
2 stops
YOW2:27 pmOttawa
$637

momondo Fare Finder

 
Customize your flight search to find flights from Region of Ontario to Decatur, Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 8, 2026.
Use the filters below to find and compare flights from Ontario to Decatur, Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OttawaDecatur

YOW - DEC

YOWDEC

Ottawa

Thu 2/19

7:30 pm-8:52 am

2 stops14h 22m

Decatur Arpt

Sun 2/22

9:50 am-9:56 pm

2 stops11h 06m

$633

OttawaDecatur

YOW - DEC

YOWDEC

Ottawa

Tue 4/21

10:25 am-6:02 pm

2 stops32h 37m

Decatur Arpt

Sat 4/25

7:20 pm-2:27 pm

2 stops18h 07m

$635

OttawaDecatur

YOW - DEC

YOWDEC

Ottawa

Tue 4/21

6:00 am-6:02 pm

2 stops13h 02m

Decatur Arpt

Sat 4/25

7:20 pm-2:27 pm

2 stops18h 07m

$637

OttawaDecatur

YOW - DEC

YOWDEC

Ottawa

Tue 4/21

6:00 am-6:02 pm

3 stops13h 02m

Decatur Arpt

Sat 4/25

7:20 pm-10:03 am

2 stops13h 43m

$669

OttawaDecatur

YOW - DEC

YOWDEC

Ottawa

Tue 4/21

6:25 am-6:02 pm

1 stop12h 37m

Decatur Arpt

Sat 4/25

7:20 pm-10:03 am

2 stops13h 43m

$671

OttawaDecatur

YOW - DEC

YOWDEC

Ottawa

Tue 4/21

6:00 am-6:02 pm

3 stops13h 02m

Decatur Arpt

Sat 4/25

7:20 pm-2:27 pm

2 stops18h 07m

$686

OttawaDecatur

YOW - DEC

YOWDEC

Ottawa

Sun 2/22

6:20 am-5:54 pm

1 stop12h 34m

$343

OttawaDecatur

YOW - DEC

YOWDEC

Ottawa

Sun 2/22

7:30 pm-8:52 am

2 stops14h 22m

$348

OttawaDecatur

YOW - DEC

YOWDEC

Ottawa

Mon 3/23

7:30 pm-5:58 pm

2 stops23h 28m

$350

OttawaDecatur

YOW - DEC

YOWDEC

Ottawa

Mon 3/23

6:20 am-5:58 pm

1 stop12h 38m

$382

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Decatur from

How to get the cheapest flight ticket from Region of Ontario to Decatur, Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Ontario to Decatur Arpt?

United Airlines is the most popular carrier operating from Ontario to Decatur Arpt

Cheap Region of Ontario to Decatur, Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Decatur, Illinois

Fastest flight time

18h 37m

Direct flights

None
The fastest flight from Region of Ontario to Decatur, Illinois takes 18h 37m
There are no direct flights from Region of Ontario to Decatur, Illinois. There are no popular flight routes from Region of Ontario to Decatur, Illinois.
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  • When did momondo last update prices for flights from Ontario to Decatur Arpt Airport?

    Prices for flights from Ontario to Decatur Arpt Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Ontario to Decatur Arpt Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario to Decatur Arpt Airport.

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

    The travel and health documents required for your trip to Decatur Arpt Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Decatur Arpt Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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 Ontario to Decatur?

It is quick and easy to find Ontario to Decatur flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Decatur that suits you.

Can I find flights from Ontario to Decatur with flexible booking policies on momondo?

momondo does allow users to show only those flights to Decatur from Ontario which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ontario to Decatur?

Once you have performed a search for Ontario to Decatur flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Decatur from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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