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Cheap flights from Missouri to Los Angeles from $61

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 4/18. 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 Missouri to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:17 pm - 11:55 pm
STL
-
ONT
29h 38m
1 stop
Frontier Logo
12:59 am - 7:12 pm
ONT
-
STL
16h 13m
1 stop
$158Frontier
Mon, May 4 - Fri, May 8
Frontier Logo
8:16 pm - 11:56 pm
STL
-
ONT
5h 40m
1 stop
Frontier Logo
10:03 pm - 12:19 pm
ONT
-
STL
12h 16m
1 stop
$190Frontier
Wed, Apr 1 - Wed, Apr 8
Frontier Logo
2:15 pm - 11:55 pm
MCI
-
ONT
11h 40m
1 stop
Frontier Logo
12:59 am - 1:30 pm
ONT
-
MCI
10h 31m
1 stop
$190Frontier
Fri, May 1 - Sun, May 3
Frontier Logo
8:06 pm - 7:31 am
STL
-
ONT
13h 25m
1 stop
Frontier Logo
12:59 am - 7:32 pm
ONT
-
STL
16h 33m
1 stop
$196Frontier
Thu, Apr 16 - Sun, Apr 19
Multiple Airlines Logo
2:15 pm - 11:55 pm
MCI
-
ONT
11h 40m
1 stop
Multiple Airlines Logo
7:29 pm - 11:36 pm
ONT
-
MCI
26h 07m
1 stop
$229Multiple Airlines
Fri, May 1 - Tue, May 5
American Airlines Logo
7:34 pm - 11:46 pm
SGF
-
ONT
6h 12m
1 stop
American Airlines Logo
11:59 pm - 9:24 am
ONT
-
SGF
7h 25m
1 stop
$289American Airlines
Wed, Apr 8 - Wed, Apr 29
American Airlines Logo
7:46 pm - 11:59 pm
SGF
-
ONT
6h 13m
1 stop
American Airlines Logo
11:59 pm - 9:24 am
ONT
-
SGF
7h 25m
1 stop
$331American Airlines
Wed, Apr 1 - Tue, Apr 7
Delta Logo
3:22 pm - 9:48 pm
SGF
-
ONT
8h 26m
1 stop
Delta Logo
12:08 pm - 10:19 pm
ONT
-
SGF
8h 11m
1 stop
$354Delta
Thu, May 28 - Wed, Jun 3
United Airlines Logo
11:30 am - 6:19 pm
COU
-
ONT
8h 49m
1 stop
United Airlines Logo
7:00 am - 5:45 pm
ONT
-
COU
8h 45m
1 stop
$358United Airlines
Wed, Aug 12 - Sat, Aug 15
United Airlines Logo
9:02 am - 12:38 pm
COU
-
ONT
5h 36m
1 stop
United Airlines Logo
6:59 pm - 10:57 am
ONT
-
COU
13h 58m
2 stops
$364United Airlines
Tue, Apr 28 - Sat, May 2

Frontier flights from Missouri to Ontario

Our best Frontier deals on Missouri to Ontario flight tickets
Frontier
May 4
STL8:17 pmLambert-St Louis
29h 38m
1 stop
ONT11:55 pmOntario
May 8
ONT12:59 amOntario
16h 13m
1 stop
STL7:12 pmLambert-St Louis
$158
Frontier
Apr 1
STL8:16 pmLambert-St Louis
5h 40m
1 stop
ONT11:56 pmOntario
Apr 8
ONT10:03 pmOntario
12h 16m
1 stop
STL12:19 pmLambert-St Louis
$190
Frontier
Apr 16
STL8:06 pmLambert-St Louis
13h 25m
1 stop
ONT7:31 amOntario
Apr 19
ONT12:59 amOntario
16h 33m
1 stop
STL7:32 pmLambert-St Louis
$196

Alaska Airlines flights from Missouri to Ontario

Our best Alaska Airlines deals on Missouri to Ontario flight tickets
Alaska Airlines
Apr 29
MCI7:00 amKansas City
9h 32m
1 stop
ONT2:32 pmOntario
May 2
ONT7:00 amOntario
7h 17m
1 stop
MCI4:17 pmKansas City
$257
Alaska Airlines
Apr 14
MCI6:15 amKansas City
29h 24m
1 stop
ONT9:39 amOntario
Apr 21
ONT6:00 amOntario
15h 59m
1 stop
MCI11:59 pmKansas City
$274
Alaska Airlines
Apr 14
MCI6:15 amKansas City
19h 44m
1 stop
ONT11:59 pmOntario
Apr 25
ONT10:39 amOntario
11h 20m
1 stop
MCI11:59 pmKansas City
$285

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 March 2, 2026.
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

Mon 5/4

8:17 pm-11:55 pm

1 stop29h 38m

Ontario

Fri 5/8

12:59 am-7:12 pm

1 stop16h 13m

$158

St. LouisOntario

STL - ONT

STLONT

Lambert-St Louis

Wed 4/1

8:16 pm-11:56 pm

1 stop5h 40m

Ontario

Wed 4/8

10:03 pm-12:19 pm

1 stop12h 16m

$190

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Fri 5/1

2:15 pm-11:55 pm

1 stop11h 40m

Ontario

Sun 5/3

12:59 am-1:30 pm

1 stop10h 31m

$190

St. LouisOntario

STL - ONT

STLONT

Lambert-St Louis

Thu 4/16

8:06 pm-7:31 am

1 stop13h 25m

Ontario

Sun 4/19

12:59 am-7:32 pm

1 stop16h 33m

$196

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Fri 5/1

2:15 pm-11:55 pm

1 stop11h 40m

Ontario

Tue 5/5

7:29 pm-11:36 pm

1 stop26h 07m

$229

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

Wed 4/8

7:34 pm-11:46 pm

1 stop6h 12m

Ontario

Wed 4/29

11:59 pm-9:24 am

1 stop7h 25m

$289

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

Wed 4/1

7:46 pm-11:59 pm

1 stop6h 13m

Ontario

Tue 4/7

11:59 pm-9:24 am

1 stop7h 25m

$331

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

Thu 5/28

3:22 pm-9:48 pm

1 stop8h 26m

Ontario

Wed 6/3

12:08 pm-10:19 pm

1 stop8h 11m

$354

ColumbiaOntario

COU - ONT

COUONT

Columbia Regional

Wed 8/12

11:30 am-6:19 pm

1 stop8h 49m

Ontario

Sat 8/15

7:00 am-5:45 pm

1 stop8h 45m

$358

ColumbiaOntario

COU - ONT

COUONT

Columbia Regional

Tue 4/28

9:02 am-12:38 pm

1 stop5h 36m

Ontario

Sat 5/2

6:59 pm-10:57 am

2 stops13h 58m

$364

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, November 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 $292. If you aren’t able to travel during the month of November, then book flights to Ontario from Missouri during August instead. Flights to Ontario in August, while not as cheap as those in November, still average around $301.

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 $344 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 $163 on momondo.

Can stopping save me money on Missouri to Ontario flights?

You could potentially save up to 75% 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

Fastest flight time

5h 10m

Direct flights

None
The fastest flight from Missouri to Ontario takes 5h 10m
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 $128Free CancellationRating
5.7
3,040 reviews
Search Frontier flights
DeltaPriceFrom $190Free CancellationRating
7.9
8,237 reviews
Search Delta flights
United AirlinesPriceFrom $253Free CancellationRating
7.4
9,375 reviews
Search United Airlines flights
American AirlinesPriceFrom $265Free CancellationRating
7.1
11,369 reviews
Search American Airlines flights
SouthwestPriceFrom $289Free CancellationRating
8.0
4,306 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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