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Cheap flights from Missouri to Los Angeles from $78

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 8/4. 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
1 adult, Economy, 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
3:41 pm - 8:37 am
STL
-
ONT
18h 56m
1 stop
Frontier Logo
6:00 am - 7:23 pm
ONT
-
STL
11h 23m
1 stop
$191Frontier
Tue, Jul 21 - Wed, Jul 29
Frontier Logo
3:41 pm - 12:53 pm
STL
-
ONT
23h 12m
2 stops
Frontier Logo
6:00 am - 7:23 pm
ONT
-
STL
11h 23m
1 stop
$226Frontier
Tue, Jul 21 - Wed, Jul 29
Frontier Logo
8:08 pm - 10:05 am
STL
-
ONT
15h 57m
1 stop
Frontier Logo
10:50 am - 7:23 pm
ONT
-
STL
6h 33m
1 stop
$243Frontier
Wed, Aug 26 - Mon, Aug 31
Frontier Logo
8:08 pm - 10:05 am
STL
-
ONT
15h 57m
1 stop
Frontier Logo
10:50 am - 7:23 pm
ONT
-
STL
6h 33m
1 stop
$245Frontier
Wed, Aug 26 - Sat, Aug 29
Multiple Airlines Logo
2:51 pm - 7:51 pm
SGF
-
ONT
7h 00m
1 stop
Multiple Airlines Logo
1:38 pm - 2:01 pm
ONT
-
SGF
22h 23m
1 stop
$305Multiple Airlines
Wed, Jul 1 - Tue, Jul 7
American Airlines Logo
6:30 am - 11:49 am
SGF
-
ONT
7h 19m
1 stop
American Airlines Logo
11:59 pm - 10:12 am
ONT
-
SGF
8h 13m
1 stop
$329American Airlines
Tue, Jun 30 - Mon, Jul 6
American Airlines Logo
6:44 pm - 10:58 pm
SGF
-
ONT
6h 14m
1 stop
American Airlines Logo
10:25 am - 7:06 pm
ONT
-
SGF
6h 41m
1 stop
$352American Airlines
Tue, Sep 1 - Wed, Sep 9
Multiple Airlines Logo
2:51 pm - 7:51 pm
SGF
-
ONT
7h 00m
1 stop
Multiple Airlines Logo
8:58 am - 2:01 pm
ONT
-
SGF
27h 03m
2 stops
$395Multiple Airlines
Wed, Jul 1 - Tue, Jul 7
United Airlines Logo
9:14 am - 12:47 pm
COU
-
ONT
5h 33m
1 stop
United Airlines Logo
1:18 pm - 8:39 pm
ONT
-
COU
5h 21m
1 stop
$399United Airlines
Wed, Jul 1 - Tue, Jul 7
United Airlines Logo
4:49 pm - 9:55 pm
SGF
-
ONT
7h 06m
1 stop
United Airlines Logo
5:45 am - 2:18 pm
ONT
-
SGF
6h 33m
1 stop
$408United Airlines
Tue, Jun 23 - Sun, Jun 28

American Airlines flights from Missouri to Ontario

Our best American Airlines deals on Missouri to Ontario flight tickets
American Airlines
Jun 30
SGF6:30 amSpringfield-Branson
7h 19m
1 stop
ONT11:49 amOntario
Jul 6
ONT11:59 pmOntario
8h 13m
1 stop
SGF10:12 amSpringfield-Branson
$329
American Airlines
Sep 1
SGF6:44 pmSpringfield-Branson
6h 14m
1 stop
ONT10:58 pmOntario
Sep 9
ONT10:25 amOntario
6h 41m
1 stop
SGF7:06 pmSpringfield-Branson
$352
American Airlines
Jun 29
SGF7:30 pmSpringfield-Branson
6h 29m
1 stop
ONT11:59 pmOntario
Jul 6
ONT11:59 pmOntario
8h 13m
1 stop
SGF10:12 amSpringfield-Branson
$359

Frontier flights from Missouri to Ontario

Our best Frontier deals on Missouri to Ontario flight tickets
Frontier
Jul 21
STL3:41 pmLambert-St Louis
18h 56m
1 stop
ONT8:37 amOntario
Jul 29
ONT6:00 amOntario
11h 23m
1 stop
STL7:23 pmLambert-St Louis
$191
Frontier
Jul 21
STL3:41 pmLambert-St Louis
23h 12m
2 stops
ONT12:53 pmOntario
Jul 29
ONT6:00 amOntario
11h 23m
1 stop
STL7:23 pmLambert-St Louis
$226
Frontier
Aug 26
STL8:08 pmLambert-St Louis
15h 57m
1 stop
ONT10:05 amOntario
Aug 31
ONT10:50 amOntario
6h 33m
1 stop
STL7:23 pmLambert-St Louis
$243

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 June 4, 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

Cheapest round-trip

St. LouisOntario

STL - ONT

STLONT

Lambert-St Louis

Tue 7/21

3:41 pm-8:37 am

1 stop18h 56m

Ontario

Wed 7/29

6:00 am-7:23 pm

1 stop11h 23m

$191

St. LouisOntario

STL - ONT

STLONT

Lambert-St Louis

Tue 7/21

3:41 pm-12:53 pm

2 stops23h 12m

Ontario

Wed 7/29

6:00 am-7:23 pm

1 stop11h 23m

$226

St. LouisOntario

STL - ONT

STLONT

Lambert-St Louis

Wed 8/26

8:08 pm-10:05 am

1 stop15h 57m

Ontario

Mon 8/31

10:50 am-7:23 pm

1 stop6h 33m

$243

St. LouisOntario

STL - ONT

STLONT

Lambert-St Louis

Wed 8/26

8:08 pm-10:05 am

1 stop15h 57m

Ontario

Sat 8/29

10:50 am-7:23 pm

1 stop6h 33m

$245

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

Wed 7/1

2:51 pm-7:51 pm

1 stop7h 00m

Ontario

Tue 7/7

1:38 pm-2:01 pm

1 stop22h 23m

$305

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

Tue 6/30

6:30 am-11:49 am

1 stop7h 19m

Ontario

Mon 7/6

11:59 pm-10:12 am

1 stop8h 13m

$329

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

Tue 9/1

6:44 pm-10:58 pm

1 stop6h 14m

Ontario

Wed 9/9

10:25 am-7:06 pm

1 stop6h 41m

$352

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

Wed 7/1

2:51 pm-7:51 pm

1 stop7h 00m

Ontario

Tue 7/7

8:58 am-2:01 pm

2 stops27h 03m

$395
Quickest round-trip

ColumbiaOntario

COU - ONT

COUONT

Columbia Regional

Wed 7/1

9:14 am-12:47 pm

1 stop5h 33m

Ontario

Tue 7/7

1:18 pm-8:39 pm

1 stop5h 21m

$399

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

Tue 6/23

4:49 pm-9:55 pm

1 stop7h 06m

Ontario

Sun 6/28

5:45 am-2:18 pm

1 stop6h 33m

$408

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Los Angeles from

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, August 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 $61. If you aren’t able to travel during the month of August, then book flights to Ontario from Missouri during November instead. Flights to Ontario in November, while not as cheap as those in August, still average around $67.

Can stopping save me money on Missouri to Ontario flights?

You could potentially save up to 67% 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 20m

Direct flights

None
The fastest flight from Missouri to Ontario takes 5h 20m
There are no direct flights from Missouri to Ontario. There are no popular flight routes from Missouri to Ontario.
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Frequently asked questions about flying from Missouri to Ontario

  • 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 $94Free CancellationRating
5.6
2,914 reviews
Search Frontier flights
United AirlinesPriceFrom $201Free CancellationRating
7.4
9,774 reviews
Search United Airlines flights
American AirlinesPriceFrom $247Free CancellationRating
7.1
11,640 reviews
Search American Airlines flights
SouthwestPriceFrom $269Free CancellationRating
8.0
4,255 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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Sat 7/4
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