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$60+ 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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — STL
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
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 November 21, 2024.

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 November 21, 2024.

This CheapOair deal was found by Cheapflights users on 11/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/410:11 pmONT - STL
1 stop19h 23mFrontier
Sat 12/76:46 pmSTL - ONT
1 stop6h 58mFrontier
Deal found 11/19$118
This Booking.com deal was found by Cheapflights users on 11/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/124:08 pmONT - MCI
1 stop23h 27mFrontier
Mon 12/166:25 pmMCI - ONT
1 stop19h 07mFrontier
Deal found 11/21$163
This United Airlines deal was found by Cheapflights users on 11/21. 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.
Sun 12/85:05 amONT - SGF
1 stop5h 46mUnited Airlines
Sat 12/145:06 pmSGF - ONT
1 stop5h 41mUnited Airlines
Deal found 11/21$313
This Alaska Airlines deal was found by Cheapflights users on 11/21. 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.
Thu 12/127:00 amONT - MCI
2 stops14h 59mAlaska Airlines
Mon 12/162:27 pmMCI - ONT
1 stop11h 32mAlaska Airlines
Deal found 11/21$327
This Delta deal was found by Cheapflights users on 11/20. 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 12/1012:11 pmONT - MCI
1 stop9h 44mDelta
Wed 12/116:30 amMCI - ONT
2 stops12h 24mDelta
Deal found 11/20$341
This American Airlines deal was found by Cheapflights users on 11/21. 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.
Thu 12/57:16 amONT - SGF
1 stop8h 17mAmerican Airlines
Thu 12/129:19 amSGF - ONT
1 stop6h 34mAmerican Airlines
Deal found 11/21$348
This Delta deal was found by Cheapflights users on 11/20. 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.
Wed 12/186:00 amONT - STL
1 stop5h 30mDelta
Wed 12/257:10 amSTL - ONT
1 stop6h 58mDelta
Deal found 11/20$361
This Southwest deal was found by Cheapflights users on 11/21. 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.
Thu 12/191:45 pmONT - MCI
1 stop8h 30mSouthwest
Sun 12/296:45 pmMCI - ONT
1 stop7h 25mSouthwest
Deal found 11/21$392
This American Airlines deal was found by Cheapflights users on 11/20. 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.
Wed 12/186:05 amONT - STL
1 stop8h 29mAmerican Airlines
Wed 12/255:21 amSTL - ONT
2 stops8h 41mAmerican Airlines
Deal found 11/20$401
This Alaska Airlines deal was found by Cheapflights users on 11/21. 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.
Sun 12/157:00 amONT - STL
2 stops14h 59mAlaska Airlines
Tue 12/177:00 amSTL - ONT
1 stop7h 58mAlaska Airlines
Deal found 11/21$407
This United Airlines deal was found by Cheapflights users on 11/20. 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.
Wed 12/116:10 amONT - STL
1 stop8h 28mUnited Airlines
Thu 12/124:31 pmSTL - ONT
1 stop6h 16mUnited Airlines
Deal found 11/20$416
This KAYAK deal was found by Cheapflights users on 11/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/106:45 amONT - STL
1 stop6h 30mSouthwest
Thu 12/126:35 amSTL - ONT
1 stop11h 20mSouthwest
Deal found 11/20$428

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 2,612,795 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioSt. Louis

ONT - STL

ONTSTL

Ontario

Thu 2/6

6:45 am-9:16 am

1 stop24h 31m

Lambert-St Louis

Sat 2/8

7:09 pm-11:47 pm

1 stop6h 38m

$117

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

Thu 12/12

4:08 pm-5:35 pm

1 stop23h 27m

Kansas City

Mon 12/16

6:25 pm-11:32 am

1 stop19h 07m

$163

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

Fri 2/7

10:40 am-5:49 pm

1 stop5h 09m

Kansas City

Mon 2/10

2:59 pm-10:39 pm

1 stop9h 40m

$230

OntarioSpringfield

ONT - SGF

ONTSGF

Ontario

Fri 3/7

1:31 am-8:39 am

1 stop5h 08m

Springfield-Branson

Tue 3/11

8:13 pm-11:51 pm

1 stop5h 38m

$268

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

Fri 1/31

11:33 am-11:59 pm

1 stop10h 26m

Kansas City

Mon 2/3

2:59 pm-10:49 am

1 stop21h 50m

$282

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

Tue 1/7

6:00 am-1:24 pm

1 stop5h 24m

Kansas City

Wed 1/8

6:45 am-3:25 pm

1 stop10h 40m

$285

OntarioSt. Louis

ONT - STL

ONTSTL

Ontario

Sat 1/18

6:00 am-1:18 pm

1 stop5h 18m

Lambert-St Louis

Tue 1/21

7:40 am-12:26 pm

1 stop6h 46m

$306

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

Mon 1/6

4:25 pm-11:59 pm

1 stop5h 34m

Kansas City

Thu 1/9

5:13 am-9:56 am

1 stop6h 43m

$306

OntarioSt. Louis

ONT - STL

ONTSTL

Ontario

Sat 1/18

6:10 am-7:23 pm

2 stops11h 13m

Lambert-St Louis

Tue 1/21

7:00 am-1:51 pm

1 stop8h 51m

$311

OntarioSpringfield

ONT - SGF

ONTSGF

Ontario

Sun 12/8

5:05 am-12:51 pm

1 stop5h 46m

Springfield-Branson

Sat 12/14

5:06 pm-8:47 pm

1 stop5h 41m

$313

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/21

Showing 1-10 of 38 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, September is the cheapest month in which you can book a flight from Ontario to Missouri (average of $308). Flying from Ontario to Missouri in March is currently the most expensive (average of $357). 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 November 21, 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 November 21, 2024.
Read reviews from past customers who have flown Delta, American Airlines and Southwest 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
5,005 reviews

Boarding

8.2

Entertainment

7.7

Food

7.2

Comfort

8.1

Overall

8.1

Crew

8.7

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
5,005 reviews
Southwest
8.1
Very good
5,005 reviews

Boarding

8.2

Entertainment

7.7

Food

7.2

Comfort

8.1

Overall

8.1

Crew

8.7

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
9,464 reviews
Southwest
8.1
Very good
5,005 reviews

Boarding

8.2

Entertainment

7.7

Food

7.2

Comfort

8.1

Overall

8.1

Crew

8.7

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
8,755 reviews
Southwest
8.1
Very good
5,005 reviews

Boarding

8.2

Entertainment

7.7

Food

7.2

Comfort

8.1

Overall

8.1

Crew

8.7

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
9,172 reviews
Southwest
8.1
Very good
5,005 reviews

Boarding

8.2

Entertainment

7.7

Food

7.2

Comfort

8.1

Overall

8.1

Crew

8.7

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
5,005 reviews

Boarding

8.2

Entertainment

7.7

Food

7.2

Comfort

8.1

Overall

8.1

Crew

8.7

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 $60. Users have also found prices from $137 and $142 on Delta and Alaska Airlines, 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, September is the cheapest month in which you can book a flight from Ontario to Missouri (average of $308). Flying from Ontario to Missouri in March is currently the most expensive (average of $357). 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 2,612,795 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$97Average$176FlexibilityNo cancel feeOn-time65%
FrontierCheapest$105Average$205FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$266Average$487FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$268Average$574FlexibilityNo cancel feeOn-time71%
DeltaCheapest$276Average$369FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$324Average$411FlexibilityNo cancel feeOn-time63%
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