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Cheap flights from Ontario (ONT) to Missouri from $70

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 6/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ONT — MCI
May 9 — May 161
From?
To?
Thu 5/9
Thu 5/16
1 adult, Economy
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How far in advance should I book a flight from Ontario to Missouri?

Travelers have found it’s best to book a flight 48 days in advance to save up to 146% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 48 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Ontario to Missouri 1-2 weeks in advance for as low as $440, or $679 for flights within the next 24 hours.

What is the cheapest month to fly from Ontario to Missouri?

Flights from Ontario to Missouri lean towards being more expensive in July. Prices are generally better when you fly from Ontario to Missouri in January, with the cheapest ticket starting at $215.

When is the cheapest time to fly from Ontario to Missouri (ONT - MO)?

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.

Cheap Delta flights from Ontario to Missouri

Explore cheap flight options specifically provided by Delta for the route between Ontario and Missouri. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,864,334 searches. Data last updated May 4, 2024.
Take a look at some of the lowest-priced Delta flights heading from Ontario to Missouri. Be sure to come back soon if the deals available don't appeal to you at this time.
Wed 7/175:00 pmONT - MCI
1 stop5h 25mDelta
Wed 7/246:20 pmMCI - ONT
1 stop7h 23mDelta
Deal found 5/3$268
Mon 9/1612:45 pmONT - MCI
1 stop7h 14mDelta
Wed 10/26:10 pmMCI - ONT
1 stop7h 41mDelta
Deal found 5/3$288
Tue 7/235:00 pmONT - MCI
1 stop5h 25mDelta
Thu 7/256:20 pmMCI - ONT
1 stop7h 23mDelta
Deal found 5/3$317
Wed 6/55:45 amONT - STL
1 stop5h 47mDelta
Tue 6/117:55 amSTL - ONT
1 stop6h 22mDelta
Deal found 5/3$354
Tue 7/3012:04 pmONT - SGF
1 stop7h 46mDelta
Sat 8/106:00 amSGF - ONT
1 stop7h 10mDelta
Deal found 5/3$357
Fri 7/195:00 pmONT - MCI
1 stop5h 25mDelta
Thu 7/256:20 pmMCI - ONT
1 stop7h 23mDelta
Deal found 5/3$366
Tue 5/146:00 amONT - SGF
1 stop8h 30mDelta
Tue 5/2112:00 pmSGF - ONT
1 stop10h 06mDelta
Deal found 5/3$452
Tue 5/146:00 amONT - SGF
1 stop8h 30mDelta
Fri 5/245:20 pmSGF - ONT
1 stop7h 27mDelta
Deal found 5/3$492
Tue 5/146:00 amONT - SGF
1 stop8h 30mDelta
Wed 5/2212:00 pmSGF - ONT
1 stop10h 06mDelta
Deal found 5/3$532

Cheap United Airlines flights from Ontario to Missouri

Explore cheap flight options specifically provided by United Airlines for the route between Ontario and Missouri. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,864,334 searches. Data last updated May 4, 2024.
Take a gander at the lowest prices we've found on United Airlines flights from Ontario to Missouri. Ensure the flight price, dates, time, and airline match your criteria before you book.
Tue 5/285:15 amONT - MCI
1 stop5h 22mUnited Airlines
Sat 6/15:26 pmMCI - ONT
1 stop5h 12mUnited Airlines
Deal found 5/4$287
Tue 5/285:15 amONT - MCI
1 stop5h 22mUnited Airlines
Thu 5/305:25 pmMCI - ONT
1 stop5h 23mUnited Airlines
Deal found 5/3$348
Sun 5/265:15 amONT - MCI
1 stop5h 22mUnited Airlines
Sat 6/15:26 pmMCI - ONT
1 stop5h 12mUnited Airlines
Deal found 5/3$367
Tue 7/91:47 pmONT - MCI
1 stop8h 42mUnited Airlines
Thu 7/116:00 amMCI - ONT
1 stop8h 15mUnited Airlines
Deal found 5/3$397
Sun 5/265:15 amONT - MCI
1 stop5h 22mUnited Airlines
Sat 6/19:41 amMCI - ONT
2 stops14h 46mUnited Airlines
Deal found 5/3$452
Sat 6/155:15 amONT - MCI
1 stop5h 22mUnited Airlines
Sat 6/155:26 pmMCI - ONT
1 stop5h 12mUnited Airlines
Deal found 5/3$466
Tue 6/185:15 amONT - MCI
1 stop5h 22mUnited Airlines
Tue 6/185:25 pmMCI - ONT
1 stop5h 23mUnited Airlines
Deal found 5/3$488
Tue 5/141:36 pmONT - SGF
1 stop5h 53mUnited Airlines
Sat 5/251:43 pmSGF - ONT
1 stop8h 55mUnited Airlines
Deal found 5/3$513
Sat 5/111:36 pmONT - SGF
1 stop5h 53mUnited Airlines
Sat 5/185:00 pmSGF - ONT
1 stop5h 53mUnited Airlines
Deal found 5/4$552

Cheap Ontario to Missouri flights in May & June 2024

Find cheap flight options from Ontario to Missouri specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,864,334 searches. Prices were last updated on May 4, 2024.
Check out some of the best flight deals from Ontario to Missouri in 2024. Check back in a little while for more flight options.
Wed 5/2911:30 pmONT - STL
1 stop8h 43mFrontier
Fri 6/75:36 pmSTL - ONT
1 stop5h 47mFrontier
Deal found 5/3$119
Sun 5/2611:30 pmONT - STL
1 stop8h 43mFrontier
Mon 6/38:04 pmSTL - ONT
1 stop5h 55mFrontier
Deal found 5/3$125
Fri 5/1711:04 pmONT - STL
1 stop9h 09mFrontier
Mon 5/208:04 pmSTL - ONT
1 stop5h 55mFrontier
Deal found 5/3$128
Sat 5/2510:10 pmONT - STL
1 stop10h 03mFrontier
Fri 5/318:45 pmSTL - ONT
1 stop12h 54mFrontier
Deal found 5/3$137
Wed 5/2211:30 pmONT - STL
1 stop8h 43mFrontier
Thu 5/305:01 pmSTL - ONT
1 stop18h 23mFrontier
Deal found 5/3$138
Fri 5/1010:59 pmONT - STL
1 stop9h 19mFrontier
Tue 5/1410:59 pmSTL - ONT
1 stop10h 09mFrontier
Deal found 5/3$139
Tue 5/2812:59 amONT - STL
1 stop6h 37mFrontier
Tue 6/410:44 pmSTL - ONT
1 stop10h 18mFrontier
Deal found 5/3$140
Sat 5/1112:59 amONT - STL
1 stop11h 30mFrontier
Thu 5/167:23 pmSTL - ONT
1 stop25h 00mFrontier
Deal found 5/3$141
Fri 6/712:48 amONT - STL
1 stop6h 41mFrontier
Fri 6/145:36 pmSTL - ONT
1 stop5h 47mFrontier
Deal found 5/3$143

Ontario to Missouri 2024 flight deals

Discover exclusive flight deals for travel between Ontario and Missouri in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,864,334 searches. Data last updated May 4, 2024.
Check out some of the best flight deals from Ontario to Missouri in 2024. Check back in a little while for more flight options.
Wed 5/2911:30 pmONT - STL
1 stop8h 43mFrontier
Fri 6/75:36 pmSTL - ONT
1 stop5h 47mFrontier
Deal found 5/3$119
Sun 5/2611:30 pmONT - STL
1 stop8h 43mFrontier
Mon 6/38:04 pmSTL - ONT
1 stop5h 55mFrontier
Deal found 5/3$125
Fri 5/1711:04 pmONT - STL
1 stop9h 09mFrontier
Mon 5/208:04 pmSTL - ONT
1 stop5h 55mFrontier
Deal found 5/3$128
Sat 5/2510:10 pmONT - STL
1 stop10h 03mFrontier
Fri 5/318:45 pmSTL - ONT
1 stop12h 54mFrontier
Deal found 5/3$137
Wed 5/2211:30 pmONT - STL
1 stop8h 43mFrontier
Thu 5/305:01 pmSTL - ONT
1 stop18h 23mFrontier
Deal found 5/3$138
Fri 5/1010:59 pmONT - STL
1 stop9h 19mFrontier
Tue 5/1410:59 pmSTL - ONT
1 stop10h 09mFrontier
Deal found 5/3$139
Tue 5/2812:59 amONT - STL
1 stop6h 37mFrontier
Tue 6/410:44 pmSTL - ONT
1 stop10h 18mFrontier
Deal found 5/3$140
Sat 5/1112:59 amONT - STL
1 stop11h 30mFrontier
Thu 5/167:23 pmSTL - ONT
1 stop25h 00mFrontier
Deal found 5/3$141
Fri 6/712:48 amONT - STL
1 stop6h 41mFrontier
Fri 6/145:36 pmSTL - ONT
1 stop5h 47mFrontier
Deal found 5/3$143

Ontario to Missouri flights leaving soon

Find last-minute flight options from Ontario to Missouri for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,864,334 searches. Data last updated May 4, 2024.
Consider one of these great deals we found on last-minute flights from Ontario to Missouri. Users should be sure to double check the price, date, and time of their last-minute flight.
Fri 5/1010:59 pmONT - STL
1 stop9h 19mFrontier
Tue 5/1410:59 pmSTL - ONT
1 stop10h 09mFrontier
Deal found 5/3$139
Fri 5/1010:29 pmONT - STL
1 stop11h 10mFrontier
Sat 5/1811:41 pmSTL - ONT
1 stop8h 36mFrontier
Deal found 5/3$140
Sat 5/1112:59 amONT - STL
1 stop11h 30mFrontier
Thu 5/167:23 pmSTL - ONT
1 stop25h 00mFrontier
Deal found 5/3$141
Fri 5/1010:29 pmONT - STL
1 stop11h 10mFrontier
Mon 5/137:51 pmSTL - ONT
1 stop28h 06mFrontier
Deal found 5/2$154
Fri 5/1010:29 pmONT - STL
1 stop11h 10mFrontier
Fri 5/178:45 pmSTL - ONT
1 stop12h 49mFrontier
Deal found 5/3$159
Sun 5/1212:59 amONT - STL
1 stop6h 48mFrontier
Fri 5/176:40 pmSTL - ONT
1 stop16h 24mFrontier
Deal found 5/3$168
Fri 5/1010:29 pmONT - STL
1 stop11h 10mFrontier
Mon 5/137:51 pmSTL - ONT
1 stop28h 06mFrontier
Deal found 5/3$171
Sat 5/1112:59 amONT - STL
1 stop11h 30mFrontier
Mon 5/208:04 pmSTL - ONT
1 stop5h 55mFrontier
Deal found 5/3$172
Fri 5/1010:59 pmONT - STL
1 stop9h 19mFrontier
Sun 5/1911:22 pmSTL - ONT
1 stop10h 43mFrontier
Deal found 5/3$179

One-way flights to Missouri from Ontario

Search for one-way flight options from Ontario to Missouri. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,864,334 searches. Data last updated May 4, 2024.
Some of the best available deals we've found on one-way flights from Ontario to Missouri. Those seeking round-trip flights from Ontario to Missouri should utilize the search form at the the top of the page.
Tue 6/412:59 amONT - STL
1 stop6h 30mFrontier
Deal found 5/3$70
Fri 6/712:48 amONT - MCI
1 stop4h 53mFrontier
Deal found 5/3$70
Wed 5/2912:59 amONT - MCI
1 stop5h 16mFrontier
Deal found 5/3$74
Mon 5/1312:59 amONT - MCI
1 stop6h 15mFrontier
Deal found 5/3$75
Fri 5/3111:04 pmONT - STL
1 stop9h 09mFrontier
Deal found 5/3$76
Wed 6/128:03 amONT - MCI
1 stop9h 13mFrontier
Deal found 5/3$76
Thu 6/612:44 amONT - STL
1 stop6h 56mFrontier
Deal found 5/4$77
Wed 6/58:03 amONT - STL
1 stop28h 29mFrontier
Deal found 5/3$80
Fri 5/2411:04 pmONT - STL
1 stop9h 09mFrontier
Deal found 5/3$82

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 2,864,334 searches. Data last updated May 4, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$119 - $290

Route

Depart

Return

Price

OntarioLambert-St Louis

ONT - STL

ONTSTL

Ontario

Wed 5/29

1 stop8h 43m

Lambert-St Louis

Fri 6/7

1 stop5h 47m

$119

OntarioLambert-St Louis

ONT - STL

ONTSTL

Ontario

Sun 5/26

1 stop8h 43m

Lambert-St Louis

Mon 6/3

1 stop5h 55m

$125

OntarioLambert-St Louis

ONT - STL

ONTSTL

Ontario

Fri 5/17

1 stop9h 09m

Lambert-St Louis

Mon 5/20

1 stop5h 55m

$128

OntarioLambert-St Louis

ONT - STL

ONTSTL

Ontario

Sat 5/25

1 stop10h 03m

Lambert-St Louis

Fri 5/31

1 stop12h 54m

$137

OntarioLambert-St Louis

ONT - STL

ONTSTL

Ontario

Wed 5/22

1 stop8h 43m

Lambert-St Louis

Thu 5/30

1 stop18h 23m

$138

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

Wed 7/17

1 stop5h 25m

Kansas City

Wed 7/24

1 stop7h 23m

$268

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

Tue 5/28

1 stop5h 22m

Kansas City

Sat 6/1

1 stop5h 12m

$287

OntarioSpringfield-Branson

ONT - SGF

ONTSGF

Ontario

Mon 7/29

1 stop9h 41m

Springfield-Branson

Thu 8/8

1 stop8h 27m

$290

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

Mon 5/27

1 stop5h 16m

Kansas City

Sat 6/1

1 stop14h 14m

$290

Flights are sorted by cheapest first

Deals found on 5/3

No data available for this route at this time. Please check back soon.

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 May 4, 2024.
Read reviews from past customers who have flown Delta, United Airlines and Frontier 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
8.2
Very good
6,099 reviews
Check prices

Comfort

8.1

Crew

8.7

Overall

8.2

Food

7.3

Entertainment

7.8

Boarding

8.3

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

Southwest
8.2
Very good
6,099 reviews
Southwest
8.2
Very good
6,099 reviews
Check prices

Comfort

8.1

Crew

8.7

Overall

8.2

Food

7.3

Entertainment

7.8

Boarding

8.3

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

Alaska Airlines
8.1
Very good
9,137 reviews
Southwest
8.2
Very good
6,099 reviews
Check prices

Comfort

8.1

Crew

8.7

Overall

8.2

Food

7.3

Entertainment

7.8

Boarding

8.3

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

Delta
8.1
Very good
10,838 reviews
Southwest
8.2
Very good
6,099 reviews
Check prices

Comfort

8.1

Crew

8.7

Overall

8.2

Food

7.3

Entertainment

7.8

Boarding

8.3

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

Avianca
7.5
Good
3,859 reviews
Southwest
8.2
Very good
6,099 reviews
Check prices

Comfort

8.1

Crew

8.7

Overall

8.2

Food

7.3

Entertainment

7.8

Boarding

8.3

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

American Airlines
7.3
Good
14,728 reviews
Southwest
8.2
Very good
6,099 reviews
Check prices

Comfort

8.1

Crew

8.7

Overall

8.2

Food

7.3

Entertainment

7.8

Boarding

8.3

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

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.

  • Can I find flights from Ontario to Missouri for under $200 on Cheapflights?

    Yes, there are multiple flights from Ontario to Missouri for under $200. The cheapest flight booked recently is on Frontier for just $119, but on average you can expect to pay $142.

  • Are there last-minute flights available from Ontario to Missouri for under $200?

    There are currently 20+ open flights from Ontario to Missouri within the next 7 days for less than $200.

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

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

  • What are the most popular airlines that fly from Ontario to Missouri?

    American Airlines, Delta and Frontier are the most popular airlines when flying from Ontario to Missouri.

  • What does ONT to MCI mean?

    ONT stands for Ontario Airport, while MCI stands for Kansas City Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Lambert-St Louis Airport (STL), Springfield-Branson Airport (SGF), Columbia Regional Airport (COU), Kansas City Downtown Airport (MKC), Branson Airport (BKG) are some additional IATA codes for airports related to your trip.

  • Can I find deals for flights from Ontario to Missouri that include extra baggage allowance?

    The amount of baggage you can bring on your Ontario to Missouri flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Ontario to Missouri with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to Missouri flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • 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.

  • Can I find deals for flights from Ontario to Missouri that allow pets onboard?

    Many airlines flying from Ontario to Missouri offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Ontario to Missouri?

    Yes, you can often find last-minute deals on Ontario to Missouri flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Ontario to Missouri flight deals updated?

    The Ontario to Missouri flight deals you see on this page were last updated on 5/3.

See more FAQs

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Alternative routes for Ontario to Missouri
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Top 5 airlines flying from Ontario to Missouri

Discover the top 5 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 2,864,334 searches. Data last updated May 4, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$104Average$192FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$112Average$247FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
DeltaCheapest$154Average$422FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$277Average$526FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$286Average$556FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
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Search flights from Ontario to Missouri by cabin class

Find flights from Ontario to Missouri, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Hourly flight availability from Ontario to Missouri

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 May 4, 2024.
0%of flight departuresEarly morningMidnight to 6 am
100%of flight departuresMorning6 am to noon
0%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to Missouri?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to Missouri. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Missouri?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ontario to Missouri for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Ontario to Missouri with no change fees?

Certainly. Search results for flights to Missouri from Ontario shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Ontario to Missouri become cheaper?

Yes, Cheapflights offers price alerts on Ontario to Missouri flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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