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Cheap flights from Missouri to Los Angeles from $62

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Missouri to Los Angeles departing on 2/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:45 pm - 11:11 amSTL-ONT
17h 26m1 stop
Frontier Logo
12:58 am - 10:02 amONT-STL
7h 04m1 stop
$134Frontier
Find Deal
Wed, Nov 19 - Thu, Nov 27
Frontier Logo
8:46 pm - 11:59 pmMCI-ONT
5h 13m1 stop
Frontier Logo
6:00 am - 7:51 pmONT-MCI
11h 51m1 stop
$134Frontier
Find Deal
Thu, Jan 8 - Fri, Jan 9
Multiple Airlines Logo
8:46 pm - 10:40 pmMCI-ONT
27h 54m1 stop
Multiple Airlines Logo
6:30 am - 11:33 pmONT-MCI
15h 03m1 stop
$170Multiple Airlines
Find Deal
Fri, Jan 9 - Mon, Jan 12
Multiple Airlines Logo
7:31 pm - 6:35 pmMCI-ONT
25h 04m2 stops
Multiple Airlines Logo
6:15 am - 8:44 pmONT-MCI
12h 29m1 stop
$209Multiple Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
United Airlines Logo
9:00 am - 12:32 pmCOU-ONT
5h 32m1 stop
United Airlines Logo
5:05 am - 5:11 pmONT-COU
10h 06m2 stops
$264United Airlines
Find Deal
Sat, Dec 6 - Sat, Dec 13
United Airlines Logo
9:00 am - 5:37 pmCOU-ONT
10h 37m2 stops
United Airlines Logo
5:05 am - 5:11 pmONT-COU
10h 06m2 stops
$269United Airlines
Find Deal
Sat, Dec 6 - Sat, Dec 13
American Airlines Logo
5:32 am - 9:57 amSGF-ONT
6h 25m1 stop
American Airlines Logo
9:59 am - 8:46 pmONT-SGF
8h 47m2 stops
$359American Airlines
Find Deal
Tue, Nov 25 - Tue, Dec 2
American Airlines Logo
8:00 am - 2:02 pmSGF-ONT
8h 02m1 stop
American Airlines Logo
11:59 pm - 8:55 amONT-SGF
6h 56m1 stop
$374American Airlines
Find Deal
Mon, Nov 17 - Sat, Nov 22
Alaska Airlines Logo
10:34 am - 7:47 pmSGF-ONT
11h 13m2 stops
Alaska Airlines Logo
6:00 am - 8:13 pmONT-SGF
12h 13m2 stops
$489Alaska Airlines
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Wed, Mar 4 - Thu, Mar 12
Alaska Airlines Logo
12:06 pm - 11:29 pmSGF-ONT
13h 23m2 stops
Alaska Airlines Logo
7:33 pm - 9:46 amONT-SGF
12h 13m2 stops
$619Alaska Airlines
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Thu, Dec 4 - Thu, Dec 11

Frontier flights from Missouri to Ontario

Our best Frontier deals on Missouri to Ontario flight tickets
Frontier
Nov 19
STL7:45 pmLambert-St Louis
17h 26m
1 stop
ONT11:11 amOntario
Nov 27
ONT12:58 amOntario
7h 04m
1 stop
STL10:02 amLambert-St Louis
$134
Find similar
Frontier
Nov 19
MCI6:49 pmKansas City
18h 22m
1 stop
ONT11:11 amOntario
Nov 24
ONT12:58 amOntario
16h 36m
1 stop
MCI7:34 pmKansas City
$135
Find similar
Frontier
Nov 19
STL7:45 pmLambert-St Louis
17h 26m
1 stop
ONT11:11 amOntario
Nov 22
ONT12:58 amOntario
16h 00m
1 stop
STL6:58 pmLambert-St Louis
$137
Find similar

United Airlines flights from Missouri to Ontario

Our best United Airlines deals on Missouri to Ontario flight tickets
United Airlines
Dec 6
COU9:00 amColumbia Regional
5h 32m
1 stop
ONT12:32 pmOntario
Dec 13
ONT5:05 amOntario
10h 06m
2 stops
COU5:11 pmColumbia Regional
$264
Find similar
United Airlines
Dec 6
COU9:00 amColumbia Regional
10h 37m
2 stops
ONT5:37 pmOntario
Dec 13
ONT5:05 amOntario
10h 06m
2 stops
COU5:11 pmColumbia Regional
$269
Find similar
United Airlines
Dec 6
COU9:00 amColumbia Regional
5h 32m
1 stop
ONT12:32 pmOntario
Dec 13
ONT1:34 pmOntario
4h 55m
1 stop
COU8:29 pmColumbia Regional
$292
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Missouri to Ontario 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 November 6, 2025.
Use the filters below to find and compare flights from Missouri to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisOntario

STL - ONT

STLONT

Lambert-St Louis

Wed 11/19

7:45 pm-11:11 am

1 stop17h 26m

Ontario

Thu 11/27

12:58 am-10:02 am

1 stop7h 04m

$134

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Thu 1/8

8:46 pm-11:59 pm

1 stop5h 13m

Ontario

Fri 1/9

6:00 am-7:51 pm

1 stop11h 51m

$134

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Fri 1/9

8:46 pm-10:40 pm

1 stop27h 54m

Ontario

Mon 1/12

6:30 am-11:33 pm

1 stop15h 03m

$170

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 12/3

7:31 pm-6:35 pm

2 stops25h 04m

Ontario

Wed 12/10

6:15 am-8:44 pm

1 stop12h 29m

$209

ColumbiaOntario

COU - ONT

COUONT

Columbia Regional

Sat 12/6

9:00 am-12:32 pm

1 stop5h 32m

Ontario

Sat 12/13

5:05 am-5:11 pm

2 stops10h 06m

$264

ColumbiaOntario

COU - ONT

COUONT

Columbia Regional

Sat 12/6

9:00 am-5:37 pm

2 stops10h 37m

Ontario

Sat 12/13

5:05 am-5:11 pm

2 stops10h 06m

$269

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

Tue 11/25

5:32 am-9:57 am

1 stop6h 25m

Ontario

Tue 12/2

9:59 am-8:46 pm

2 stops8h 47m

$359

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

Mon 11/17

8:00 am-2:02 pm

1 stop8h 02m

Ontario

Sat 11/22

11:59 pm-8:55 am

1 stop6h 56m

$374

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

Wed 3/4

10:34 am-7:47 pm

2 stops11h 13m

Ontario

Thu 3/12

6:00 am-8:13 pm

2 stops12h 13m

$489

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

Thu 12/4

12:06 pm-11:29 pm

2 stops13h 23m

Ontario

Thu 12/11

7:33 pm-9:46 am

2 stops12h 13m

$619

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Missouri to Ontario

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 Ontario?

In general, February is the cheapest month to fly from Missouri to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $213. If you aren’t able to travel during the month of February, then book flights to Ontario from Missouri during November instead. Flights to Ontario in November, while not as cheap as those in February, still average around $298.

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

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $291. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Missouri to Ontario for around $376.

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

In the afternoon is the cheapest time of day to fly from Missouri to Ontario when you can find flight prices for as low as $361. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $442 on average. Flights to Ontario from Missouri in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You are more likely to see cheaper flights to Ontario from Missouri when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $355 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Missouri for as low as $130 on momondo.

Can stopping save me money on Missouri to Ontario flights?

You could potentially save up to 86% on your flight if you consider stops on a Missouri to Ontario flight.

Cheap Missouri to Ontario flight deals and tips

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

Direct flights

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

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

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

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Missouri to Ontario Airport.

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

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

Best airlines flying from Missouri to Ontario

Compare and see reviews for airlines that fly from Missouri to Ontario with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $108Free CancellationRating
5.8
3,115 reviews
Search Frontier flights
DeltaPriceFrom $171Free CancellationRating
7.9
8,001 reviews
Search Delta flights
American AirlinesPriceFrom $264Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights
United AirlinesPriceFrom $284Free CancellationRating
7.4
9,007 reviews
Search United Airlines flights
SouthwestPriceFrom $290Free CancellationRating
8.0
4,241 reviews
Search Southwest flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Missouri to Ontario for you.

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

All flight searches from Missouri to Ontario on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search for Missouri to Ontario 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 Missouri to Ontario right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Missouri to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ontario and let you know when they change.

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