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$54+ Cheap flights from Ontario (ONT) to Missouri

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — STL
Dec 29 — Jan 51
Sun 12/29
Sun 1/5
1 adult, Economy
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Cheap flight deals from Ontario to Missouri

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Missouri (USMO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 24, 2024.

Round-trip from

$108
(Frontier)

One-way from

$54
(Cheapflightsfares)
From Ontario to Missouri
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One-way flight from Ontario to Missouri
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Find flight deals from Ontario to Missouri

Cheapest flights from Ontario to Missouri
Explore the most affordable flight options available from Ontario to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 24, 2024.

This FlightHub deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/252:33 pmONT - STL
1 stop18h 37mFrontier
Thu 1/210:09 pmSTL - ONT
1 stop27h 50mFrontier
Deal found 12/22$140
This Gotogate deal was found by Cheapflights users on 12/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3112:59 amONT - MCI
1 stop10h 39mFrontier
Sun 1/58:28 pmMCI - ONT
1 stop16h 32mFrontier
Deal found 12/23$328
This Delta deal was found by Cheapflights users on 12/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/315:30 amONT - STL
1 stop5h 50mDelta
Wed 1/85:00 pmSTL - ONT
1 stop8h 53mDelta
Deal found 12/23$336
This United Airlines deal was found by Cheapflights users on 12/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/306:10 amONT - SGF
1 stop5h 50mUnited Airlines
Mon 1/64:55 pmSGF - ONT
1 stop7h 34mUnited Airlines
Deal found 12/23$431
This American Airlines deal was found by Cheapflights users on 12/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2912:59 amONT - SGF
1 stop6h 53mAmerican Airlines
Mon 1/65:16 amSGF - ONT
1 stop8h 30mAmerican Airlines
Deal found 12/23$461
This United Airlines deal was found by Cheapflights users on 12/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/316:00 amONT - MCI
1 stop6h 51mUnited Airlines
Thu 1/25:20 amMCI - ONT
2 stops9h 56mUnited Airlines
Deal found 12/23$606
This Southwest deal was found by Cheapflights users on 12/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/316:45 amONT - STL
2 stops8h 20mSouthwest
Sat 1/41:40 pmSTL - ONT
1 stop6h 25mSouthwest
Deal found 12/23$637
This United Airlines deal was found by Cheapflights users on 12/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/305:05 amONT - STL
2 stops31h 19mUnited Airlines
Wed 1/18:35 amSTL - ONT
1 stop6h 05mUnited Airlines
Deal found 12/23$671
This Delta deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2811:56 amONT - MCI
1 stop10h 00mDelta
Wed 1/112:34 pmMCI - ONT
1 stop9h 07mDelta
Deal found 12/24$701
This American Airlines deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2912:59 amONT - MCI
1 stop6h 47mAmerican Airlines
Wed 1/15:12 amMCI - ONT
2 stops8h 50mAmerican Airlines
Deal found 12/24$752
This Alaska Airlines deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3110:40 amONT - STL
2 stops24h 47mAlaska Airlines
Sat 1/42:23 pmSTL - ONT
1 stop31h 14mAlaska Airlines
Deal found 12/24$852
This Alaska Airlines deal was found by Cheapflights users on 12/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2410:40 amONT - MCI
2 stops25h 12mAlaska Airlines
Thu 1/27:00 amMCI - ONT
1 stop7h 33mAlaska Airlines
Deal found 12/23$929

Find flights from Ontario to Missouri within your budget

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, Cheapflights users made 2,558,603 searches. Data last updated December 24, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioSt. Louis

ONT - STL

ONTSTL

Ontario

Thu 1/30

7:56 am-7:31 pm

1 stop9h 35m

Lambert-St Louis

Wed 2/5

7:09 pm-11:47 pm

1 stop6h 38m

$108

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

Sun 2/23

12:59 am-7:35 pm

1 stop16h 36m

Kansas City

Wed 2/26

8:35 pm-9:31 am

1 stop14h 56m

$138

OntarioSpringfield

ONT - SGF

ONTSGF

Ontario

Tue 1/21

1:00 pm-10:31 pm

1 stop7h 31m

Springfield-Branson

Sat 1/25

6:00 am-11:50 am

1 stop7h 50m

$268

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

Mon 1/27

10:40 am-5:49 pm

1 stop5h 09m

Kansas City

Thu 2/20

2:56 pm-11:24 pm

1 stop10h 28m

$272

OntarioSpringfield

ONT - SGF

ONTSGF

Ontario

Wed 1/8

6:00 am-1:44 pm

1 stop5h 44m

Springfield-Branson

Sat 1/11

2:14 pm-6:37 pm

1 stop6h 23m

$318

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

Wed 1/29

7:05 am-5:39 pm

1 stop8h 34m

Kansas City

Wed 2/5

7:00 am-12:24 pm

1 stop7h 24m

$318

OntarioSt. Louis

ONT - STL

ONTSTL

Ontario

Tue 1/14

10:00 am-10:56 pm

2 stops10h 56m

Lambert-St Louis

Wed 1/15

6:44 am-11:58 am

1 stop7h 14m

$321

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

Wed 1/29

6:10 am-4:28 pm

2 stops8h 18m

Kansas City

Wed 2/5

7:04 am-1:51 pm

1 stop8h 47m

$323

OntarioSt. Louis

ONT - STL

ONTSTL

Ontario

Wed 1/15

1:21 pm-9:33 pm

1 stop6h 12m

Lambert-St Louis

Sun 1/19

7:40 am-12:26 pm

1 stop6h 46m

$327

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

Wed 4/16

6:00 am-6:48 pm

2 stops10h 48m

Kansas City

Wed 4/23

7:00 am-3:32 pm

1 stop10h 32m

$345

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/24

Showing 1-10 of 35 results
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Best time to book a flight from Ontario to Missouri

Have a flexible travel schedule? Discover the best time to fly to Missouri from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Ontario to Missouri

Get recent, data-driven insights about flights from Ontario to Missouri including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Ontario to Missouri?

Currently, August is the cheapest month in which you can book a flight from Ontario to Missouri (average of $311). Flying from Ontario to Missouri in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to MO?

Find hourly flight availability from Ontario to Missouri. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 24, 2024.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Missouri as you normally would.

Rainfall in Missouri by month

Plan your trip to Missouri by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Missouri ranges from 1.1 - 5.2 inches per month. May is typically the wettest month, when rainfall can reach 5.2 in. January is typically the driest time to visit Missouri when rainfall is around 1.1 in.

Temperature in Missouri by month

Plan your trip to Missouri by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Missouri, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 28.4 F).

Reviews of airlines servicing Missouri

Get insights into the airlines that provide service to Missouri. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Missouri. Reviews last updated December 24, 2024.
Read reviews from past customers who have flown Frontier, Southwest and American Airlines from Ontario to Missouri. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,765 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Southwest
8.1
Very good
4,765 reviews
Southwest
8.1
Very good
4,765 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Alaska Airlines
8.0
Very good
9,555 reviews
Southwest
8.1
Very good
4,765 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Delta
8.0
Very good
8,580 reviews
Southwest
8.1
Very good
4,765 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

United Airlines
7.4
Good
9,009 reviews
Southwest
8.1
Very good
4,765 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,765 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Related info for your journey

Find useful and relevant information for your journey from Ontario to Missouri. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Missouri?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Missouri from Ontario.

  • What are the cheapest airlines to fly from Ontario to Missouri one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $54. Users have also found prices from $159 and $169 on Alaska Airlines and Delta, respectively.

  • What are the most popular routes from Ontario to Missouri?

    The most popular route from Ontario to Missouri is Ontario - Kansas City. You may also consider Ontario - Lambert-St Louis or Ontario - Springfield-Branson.

  • Can I find deals for flights from Ontario to Missouri that include hotel bookings?

    Yes. In addition to deals on Ontario to Missouri flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Missouri?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Missouri.

  • Can I find deals for business class flights from Ontario to Missouri?

    Yes. Cheapflights offers flight deals from Ontario to Missouri by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Missouri?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Missouri (average of $311). Flying from Ontario to Missouri in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Ontario to Missouri

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Ontario to Missouri

Discover the top 6 airlines that operate flights from Ontario to Missouri. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 24, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$97Average$177FlexibilityNo cancel feeOn-time65%
FrontierCheapest$104Average$203FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$263Average$490FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$268Average$574FlexibilityNo cancel feeOn-time71%
DeltaCheapest$276Average$382FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$314Average$412FlexibilityNo cancel feeOn-time63%
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