Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Ontario to Missouri from $72

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 Missouri departing on 10/30. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Ontario to Missouri

Cheap round-trip flights

Frontier Logo
12:05 pm - 7:33 pmONT-MCI
5h 28m1 stop
Frontier Logo
8:28 pm - 11:50 pmMCI-ONT
5h 22m1 stop
$141Frontier
Find Deal
sáb., nov. 15 - lun., nov. 17
Frontier Logo
10:30 am - 9:07 amONT-STL
20h 37m1 stop
Frontier Logo
7:52 pm - 9:35 amSTL-ONT
15h 43m1 stop
$142Frontier
Find Deal
jue., oct. 16 - mié., oct. 22
Multiple Airlines Logo
6:53 am - 5:55 pmONT-MCI
9h 02m1 stop
Multiple Airlines Logo
2:55 pm - 8:42 pmMCI-ONT
7h 47m1 stop
$210Multiple Airlines
Find Deal
mié., oct. 22 - mar., oct. 28
Multiple Airlines Logo
10:28 pm - 2:00 pmONT-MCI
13h 32m1 stop
Multiple Airlines Logo
7:02 pm - 11:50 pmMCI-ONT
6h 48m1 stop
$212Multiple Airlines
Find Deal
lun., oct. 6 - mié., oct. 8
American Airlines Logo
11:55 pm - 8:30 amONT-SGF
6h 35m1 stop
American Airlines Logo
5:45 am - 9:31 amSGF-ONT
5h 46m1 stop
$269American Airlines
Find Deal
jue., feb. 26 - dom., mar. 1
Delta Logo
11:48 am - 12:24 amONT-STL
10h 36m2 stops
Delta Logo
6:00 am - 5:10 pmSTL-ONT
13h 10m2 stops
$291Delta
Find Deal
mar., oct. 28 - mar., nov. 4
American Airlines Logo
10:34 pm - 9:35 amONT-STL
9h 01m1 stop
American Airlines Logo
5:17 am - 9:57 amSTL-ONT
6h 40m1 stop
$293American Airlines
Find Deal
mar., nov. 18 - jue., nov. 20
United Airlines Logo
5:05 am - 12:47 pmONT-SGF
5h 42m1 stop
United Airlines Logo
3:20 pm - 10:31 pmSGF-ONT
9h 11m1 stop
$325United Airlines
Find Deal
vie., oct. 31 - sáb., nov. 1
Delta Logo
11:36 am - 10:09 pmONT-SGF
8h 33m1 stop
Delta Logo
11:44 am - 9:20 pmSGF-ONT
11h 36m2 stops
$329Delta
Find Deal
vie., oct. 31 - sáb., nov. 1
United Airlines Logo
4:15 pm - 11:40 pmONT-SGF
5h 25m1 stop
United Airlines Logo
3:05 pm - 9:24 pmSGF-ONT
8h 19m1 stop
$349United Airlines
Find Deal
mar., oct. 14 - mar., oct. 21

Frontier flights from Ontario to Missouri

Our best Frontier deals on Ontario to Missouri flight tickets
Frontier
Nov 15
ONT12:05 pmOntario
5h 28m
1 stop
MCI7:33 pmKansas City
Nov 17
MCI8:28 pmKansas City
5h 22m
1 stop
ONT11:50 pmOntario
$141
Find similar
Frontier
Oct 16
ONT10:30 amOntario
20h 37m
1 stop
STL9:07 amLambert-St Louis
Oct 22
STL7:52 pmLambert-St Louis
15h 43m
1 stop
ONT9:35 amOntario
$142
Find similar
Frontier
Sep 30
ONT8:59 pmOntario
10h 07m
1 stop
STL9:06 amLambert-St Louis
Oct 21
STL7:52 pmLambert-St Louis
5h 58m
1 stop
ONT11:50 pmOntario
$143
Find similar

American Airlines flights from Ontario to Missouri

Our best American Airlines deals on Ontario to Missouri flight tickets
American Airlines
Feb 26
ONT11:55 pmOntario
6h 35m
1 stop
SGF8:30 amSpringfield-Branson
Mar 1
SGF5:45 amSpringfield-Branson
5h 46m
1 stop
ONT9:31 amOntario
$269
Find similar
American Airlines
Nov 18
ONT10:34 pmOntario
9h 01m
1 stop
STL9:35 amLambert-St Louis
Nov 20
STL5:17 amLambert-St Louis
6h 40m
1 stop
ONT9:57 amOntario
$293
Find similar
American Airlines
Nov 8
ONT7:00 amOntario
7h 27m
1 stop
STL4:27 pmLambert-St Louis
Nov 11
STL9:36 amLambert-St Louis
8h 27m
2 stops
ONT4:03 pmOntario
$298
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Missouri 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 septiembre 24, 2025.
Use the filters below to find and compare flights from Ontario to Missouri that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

sáb. 11/15

12:05 pm-7:33 pm

1 stop5h 28m

Kansas City

lun. 11/17

8:28 pm-11:50 pm

1 stop5h 22m

$141

OntarioSt. Louis

ONT - STL

ONTSTL

Ontario

jue. 10/16

10:30 am-9:07 am

1 stop20h 37m

Lambert-St Louis

mié. 10/22

7:52 pm-9:35 am

1 stop15h 43m

$142

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

mié. 10/22

6:53 am-5:55 pm

1 stop9h 02m

Kansas City

mar. 10/28

2:55 pm-8:42 pm

1 stop7h 47m

$210

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

lun. 10/6

10:28 pm-2:00 pm

1 stop13h 32m

Kansas City

mié. 10/8

7:02 pm-11:50 pm

1 stop6h 48m

$212

OntarioSpringfield

ONT - SGF

ONTSGF

Ontario

jue. 2/26

11:55 pm-8:30 am

1 stop6h 35m

Springfield-Branson

dom. 3/1

5:45 am-9:31 am

1 stop5h 46m

$269

OntarioSt. Louis

ONT - STL

ONTSTL

Ontario

mar. 10/28

11:48 am-12:24 am

2 stops10h 36m

Lambert-St Louis

mar. 11/4

6:00 am-5:10 pm

2 stops13h 10m

$291

OntarioSt. Louis

ONT - STL

ONTSTL

Ontario

mar. 11/18

10:34 pm-9:35 am

1 stop9h 01m

Lambert-St Louis

jue. 11/20

5:17 am-9:57 am

1 stop6h 40m

$293

OntarioSpringfield

ONT - SGF

ONTSGF

Ontario

vie. 10/31

5:05 am-12:47 pm

1 stop5h 42m

Springfield-Branson

sáb. 11/1

3:20 pm-10:31 pm

1 stop9h 11m

$325

OntarioSpringfield

ONT - SGF

ONTSGF

Ontario

vie. 10/31

11:36 am-10:09 pm

1 stop8h 33m

Springfield-Branson

sáb. 11/1

11:44 am-9:20 pm

2 stops11h 36m

$329

OntarioSpringfield

ONT - SGF

ONTSGF

Ontario

mar. 10/14

4:15 pm-11:40 pm

1 stop5h 25m

Springfield-Branson

mar. 10/21

3:05 pm-9:24 pm

1 stop8h 19m

$349

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Missouri from

How to get the cheapest flight ticket from Ontario to Missouri

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 month to fly to Missouri?

In general, January is the cheapest month to fly from Ontario to Missouri. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $212. If you aren’t able to travel to Missouri during the month of January, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $291.

What is the cheapest day to depart on your flight to Missouri?

The cheapest day to depart from Ontario to Missouri is on a Monday when prices can be found for as low as $261. Flights from Ontario to Missouri on a Sunday will generally be more expensive and average around $417. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Missouri?

According to our data, the cheapest time of day to fly to Missouri is in the evening. momondo users have found flights departing from Ontario to Missouri in the evening for as low as $189. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Missouri are more costly in the afternoon, with an average ticket price of $461. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to Missouri?

You are more likely to see cheaper flights to Missouri from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Missouri for around $358 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Missouri from Ontario for as low as $278 on momondo.

Cheap Ontario to Missouri flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Missouri

Direct flights

None
There are no direct flights from Ontario to Missouri. There are no popular flight routes from Ontario to Missouri.
Search flight deals

  • When did momondo last update prices for flights from Ontario Airport to Missouri?

    Prices for flights from Ontario Airport to Missouri were last updated today.

  • How many operators does momondo search for flights from Ontario Airport to Missouri?

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

    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 Ontario Airport to Missouri.

  • What documentation or ID do you need to fly to Missouri?

    The travel and health documents required for your trip to Missouri 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 Missouri. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Ontario to Missouri

Compare and see reviews for airlines that fly from Ontario to Missouri with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $122Free CancellationRating
5.8
3,163 reviews
Search Frontier flights
DeltaPriceFrom $134Free CancellationRating
7.9
7,973 reviews
Search Delta flights
SouthwestPriceFrom $247Free CancellationRating
8.0
4,244 reviews
Search Southwest flights
American AirlinesPriceFrom $268Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $278Free CancellationRating
7.4
8,928 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Missouri?

Finding the right flight to Missouri from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Missouri quick and easy, saving you time and money.

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

momondo does allow users to show only those flights to Missouri 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 Missouri?

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 Ontario to Missouri.

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

Yes. momondo can track prices for Ontario to Missouri flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Missouri trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
vie. 10/24
vie. 10/31
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Missouri

Popular cities in Missouri

Popular flights according to clicks in the last 7 days on momondo
Flights to New Yorkfrom $50
Flights to Los Angelesfrom $44
Flights to Miamifrom $49
Flights to Chicagofrom $65
Flights to Orlandofrom $56
Flights to Las Vegasfrom $44
Flights to San Franciscofrom $60
Flights to Washington, D.C.from $56
Flights to Bostonfrom $68
Flights to Atlantafrom $51
Flights to Dallasfrom $60
Flights to Seattlefrom $86