Cheap flights from Missouri to Ontario (ONT) from $55

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 5/16. 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.
STL — ONT
Apr 2 — Apr 91

How far in advance should I book a flight from Missouri to Ontario?

Travelers have found it’s best to book a flight 58 days in advance to save up to 30% 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 58 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 Missouri to Ontario 1-2 weeks in advance for as low as $477, or $754 for flights within the next 24 hours.

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

The best pricing can be found in the month of January. Prices to Ontario from Missouri average $446. You can even find prices in January for less than $446, as users have found deals to Ontario from as low as $177. The month of March appears to be one of the more expensive times to travel to Ontario from Missouri. Flying in the targeted month can save you up to 11%.

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

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

Cheap Frontier flights from Missouri to Ontario

Explore cheap flight options specifically provided by Frontier for the route between Missouri and Ontario. 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 3,228,805 searches. Data last updated March 28, 2024.
Check out some of the cheapest Frontier flights we've come across from Missouri to Ontario. Make sure to double check the flight details before booking.
Wed 5/18:04 pmSTL - ONT
1 stop5h 55mFrontier
Mon 5/2011:22 pmONT - STL
1 stop8h 56mFrontier
Deal found 3/26$75
Wed 5/158:04 pmSTL - ONT
1 stop5h 55mFrontier
Fri 5/1712:59 amONT - STL
1 stop6h 26mFrontier
Deal found 3/27$76
Wed 4/248:04 pmSTL - ONT
1 stop12h 22mFrontier
Wed 5/110:49 pmONT - STL
1 stop9h 29mFrontier
Deal found 3/27$90
Sat 4/2012:59 pmSTL - ONT
1 stop6h 00mFrontier
Fri 4/2612:55 amONT - STL
1 stop6h 52mFrontier
Deal found 3/27$91
Sat 4/2012:59 pmSTL - ONT
1 stop6h 00mFrontier
Mon 4/2212:59 amONT - STL
1 stop12h 51mFrontier
Deal found 3/28$98
Thu 4/2511:38 amSTL - ONT
1 stop20h 48mFrontier
Mon 4/2910:59 pmONT - STL
1 stop9h 19mFrontier
Deal found 3/27$99
Sat 4/2012:59 pmSTL - ONT
1 stop6h 00mFrontier
Mon 4/2212:59 amONT - STL
1 stop12h 51mFrontier
Deal found 3/27$100
Thu 5/27:07 pmMCI - ONT
1 stop6h 49mFrontier
Sat 5/47:26 amONT - MCI
1 stop23h 58mFrontier
Deal found 3/27$104
Wed 5/18:04 pmSTL - ONT
1 stop5h 55mFrontier
Fri 5/1010:59 pmONT - STL
1 stop9h 19mFrontier
Deal found 3/28$107

Cheap United Airlines flights from Missouri to Ontario

Explore cheap flight options specifically provided by United Airlines for the route between Missouri and Ontario. 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 3,228,805 searches. Data last updated March 28, 2024.
Browse through some of the cheapest United Airlines flights traveling from Missouri to Ontario. Check back soon if you're not seeing flights that suit your needs.
Sat 9/73:10 pmSGF - ONT
1 stop8h 11mUnited Airlines
Tue 9/106:02 amONT - SGF
1 stop5h 38mUnited Airlines
Deal found 3/26$367
Wed 4/175:07 pmMCI - ONT
1 stop5h 33mUnited Airlines
Sat 4/2010:45 amONT - MCI
1 stop9h 21mUnited Airlines
Deal found 3/27$378
Fri 5/36:05 amMCI - ONT
2 stops18h 59mUnited Airlines
Sat 5/45:15 amONT - MCI
1 stop5h 26mUnited Airlines
Deal found 3/27$412
Sat 5/255:26 pmMCI - ONT
1 stop5h 12mUnited Airlines
Tue 5/285:15 amONT - MCI
1 stop5h 22mUnited Airlines
Deal found 3/27$534
Mon 8/125:13 pmMCI - ONT
1 stop5h 35mUnited Airlines
Wed 8/145:20 amONT - MCI
1 stop8h 51mUnited Airlines
Deal found 3/27$556
Sat 5/255:26 pmMCI - ONT
1 stop5h 12mUnited Airlines
Mon 5/275:15 amONT - MCI
1 stop5h 22mUnited Airlines
Deal found 3/26$564
Wed 4/38:47 amSTL - ONT
2 stops16h 17mUnited Airlines
Wed 4/105:15 amONT - STL
1 stop14h 37mUnited Airlines
Deal found 3/27$571
Sat 5/185:07 pmMCI - ONT
1 stop5h 46mUnited Airlines
Fri 5/241:50 pmONT - MCI
1 stop8h 45mUnited Airlines
Deal found 3/28$576
Mon 6/35:25 pmMCI - ONT
1 stop5h 23mUnited Airlines
Sun 6/95:15 amONT - MCI
1 stop5h 22mUnited Airlines
Deal found 3/27$606

Cheap Missouri to Ontario flights in March & April 2024

Find cheap flight options from Missouri to Ontario specifically for the months of March and April 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,228,805 searches. Prices were last updated on March 28, 2024.
These are some of the best deals we've found on flights to Ontario in 2024 at this time. More deals are always being added, so be sure to check back regularly.
Wed 4/248:04 pmSTL - ONT
1 stop12h 22mFrontier
Wed 5/110:49 pmONT - STL
1 stop9h 29mFrontier
Deal found 3/27$90
Sat 4/2012:59 pmSTL - ONT
1 stop6h 00mFrontier
Fri 4/2612:55 amONT - STL
1 stop6h 52mFrontier
Deal found 3/27$91
Sat 4/2012:59 pmSTL - ONT
1 stop6h 00mFrontier
Mon 4/2212:59 amONT - STL
1 stop12h 51mFrontier
Deal found 3/28$98
Thu 4/2511:38 amSTL - ONT
1 stop20h 48mFrontier
Mon 4/2910:59 pmONT - STL
1 stop9h 19mFrontier
Deal found 3/27$99
Sat 4/2012:59 pmSTL - ONT
1 stop6h 00mFrontier
Mon 4/2212:59 amONT - STL
1 stop12h 51mFrontier
Deal found 3/27$100
Wed 4/178:04 pmSTL - ONT
1 stop12h 22mFrontier
Sat 4/2712:59 amONT - STL
1 stop11h 30mFrontier
Deal found 3/27$114
Fri 4/267:51 pmSTL - ONT
1 stop28h 07mFrontier
Mon 4/2910:59 pmONT - STL
1 stop9h 19mFrontier
Deal found 3/27$117
Tue 4/237:07 pmMCI - ONT
1 stop6h 52mFrontier
Mon 4/2912:59 amONT - MCI
1 stop6h 15mFrontier
Deal found 3/26$118
Thu 4/1810:56 pmSTL - ONT
1 stop10h 12mFrontier
Wed 4/2412:59 amONT - STL
1 stop7h 39mFrontier
Deal found 3/27$120

Missouri to Ontario 2024 flight deals

Discover exclusive flight deals for travel between Missouri and Ontario in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,228,805 searches. Data last updated March 28, 2024.
These are some of the best deals we've found on flights to Ontario in 2024 at this time. More deals are always being added, so be sure to check back regularly.
Wed 5/18:04 pmSTL - ONT
1 stop5h 55mFrontier
Mon 5/2011:22 pmONT - STL
1 stop8h 56mFrontier
Deal found 3/26$75
Wed 5/158:04 pmSTL - ONT
1 stop5h 55mFrontier
Fri 5/1712:59 amONT - STL
1 stop6h 26mFrontier
Deal found 3/27$76
Wed 4/248:04 pmSTL - ONT
1 stop12h 22mFrontier
Wed 5/110:49 pmONT - STL
1 stop9h 29mFrontier
Deal found 3/27$90
Thu 5/27:07 pmMCI - ONT
1 stop6h 49mFrontier
Mon 5/612:59 amONT - MCI
1 stop6h 15mFrontier
Deal found 3/27$90
Sat 4/2012:59 pmSTL - ONT
1 stop6h 00mFrontier
Fri 4/2612:55 amONT - STL
1 stop6h 52mFrontier
Deal found 3/27$91
Sat 4/2012:59 pmSTL - ONT
1 stop6h 00mFrontier
Mon 4/2212:59 amONT - STL
1 stop12h 51mFrontier
Deal found 3/28$98
Thu 4/2511:38 amSTL - ONT
1 stop20h 48mFrontier
Mon 4/2910:59 pmONT - STL
1 stop9h 19mFrontier
Deal found 3/27$99
Sat 4/2012:59 pmSTL - ONT
1 stop6h 00mFrontier
Mon 4/2212:59 amONT - STL
1 stop12h 51mFrontier
Deal found 3/27$100
Thu 5/27:07 pmMCI - ONT
1 stop6h 49mFrontier
Sat 5/47:26 amONT - MCI
1 stop23h 58mFrontier
Deal found 3/27$104

Missouri to Ontario flights leaving soon

Find last-minute flight options from Missouri to Ontario 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 3,228,805 searches. Data last updated March 28, 2024.
Book one of these great deals on flights from Missouri to Ontario. To prevent any unwanted surprises, users should verify their flight info before booking.
Tue 4/28:40 pmMCI - ONT
1 stop11h 57mFrontier
Mon 4/812:59 amONT - MCI
1 stop5h 34mFrontier
Deal found 3/26$147
Wed 4/38:45 pmSTL - ONT
1 stop11h 52mFrontier
Tue 4/912:59 amONT - STL
1 stop6h 48mFrontier
Deal found 3/27$148
Thu 4/47:37 pmSTL - ONT
1 stop14h 23mFrontier
Thu 4/117:16 amONT - STL
1 stop24h 31mFrontier
Deal found 3/27$188
Thu 4/47:43 pmMCI - ONT
1 stop12h 54mFrontier
Mon 4/812:59 amONT - MCI
1 stop5h 34mFrontier
Deal found 3/26$198
Wed 4/38:45 pmSTL - ONT
1 stop11h 52mFrontier
Sun 4/79:41 pmONT - STL
1 stop10h 42mFrontier
Deal found 3/26$212
Fri 4/57:37 pmSTL - ONT
1 stop18h 28mFrontier
Mon 4/89:55 pmONT - STL
2 stops21h 19mFrontier
Deal found 3/26$213
Fri 4/57:37 pmSTL - ONT
1 stop18h 28mFrontier
Tue 4/97:27 amONT - STL
1 stop24h 20mFrontier
Deal found 3/27$217
Fri 4/57:37 pmSTL - ONT
1 stop18h 28mFrontier
Mon 4/89:55 pmONT - STL
1 stop10h 28mFrontier
Deal found 3/27$222
Sat 4/65:05 pmMCI - ONT
1 stop15h 32mFrontier
Mon 4/812:59 amONT - MCI
1 stop5h 34mFrontier
Deal found 3/27$226

One-way flights to Ontario from Missouri

Search for one-way flight options from Missouri to Ontario. 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 3,228,805 searches. Data last updated March 28, 2024.
Users traveling one-way from Missouri to Ontario can select one of these great deals. Users can also find round-trip Missouri to Ontario flights by using the search form above.
Thu 5/165:01 pmSTL - ONT
1 stop24h 38mFrontier
Deal found 3/27$55
Tue 4/167:07 pmMCI - ONT
1 stop6h 52mFrontier
Deal found 3/27$69
Fri 5/177:45 pmMCI - ONT
1 stop13h 49mFrontier
Deal found 3/27$73
Sat 4/138:04 pmSTL - ONT
1 stop5h 55mFrontier
Deal found 3/27$75
Fri 4/265:35 pmSTL - ONT
1 stop8h 20mFrontier
Deal found 3/28$78
Sat 4/2712:39 pmSTL - ONT
2 stops11h 19mFrontier
Deal found 3/28$80
Thu 4/1110:56 pmSTL - ONT
1 stop10h 12mFrontier
Deal found 3/28$81
Sun 5/1210:59 pmSTL - ONT
1 stop10h 04mFrontier
Deal found 3/28$82
Sun 4/143:29 pmSTL - ONT
1 stop10h 30mFrontier
Deal found 3/27$95

Find flights from Missouri to Ontario within your budget

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, Cheapflights users made 3,228,805 searches. Data last updated March 28, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$75 - $298

Route

Depart

Return

Price

Lambert-St LouisOntario

STL - ONT

STLONT

Lambert-St Louis

Wed 5/1

1 stop5h 55m

Ontario

Mon 5/20

1 stop8h 56m

$75

Lambert-St LouisOntario

STL - ONT

STLONT

Lambert-St Louis

Wed 5/15

1 stop5h 55m

Ontario

Fri 5/17

1 stop6h 26m

$76

Lambert-St LouisOntario

STL - ONT

STLONT

Lambert-St Louis

Wed 4/24

1 stop12h 22m

Ontario

Wed 5/1

1 stop9h 29m

$90

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Thu 5/2

1 stop6h 49m

Ontario

Mon 5/6

1 stop6h 15m

$90

Lambert-St LouisOntario

STL - ONT

STLONT

Lambert-St Louis

Sat 4/20

1 stop6h 00m

Ontario

Fri 4/26

1 stop6h 52m

$91

Lambert-St LouisOntario

STL - ONT

STLONT

Lambert-St Louis

Sat 4/20

1 stop6h 00m

Ontario

Mon 4/22

1 stop12h 51m

$98

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Tue 4/30

1 stop14h 47m

Ontario

Mon 5/6

1 stop6h 15m

$145

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Sat 5/4

1 stop6h 36m

Ontario

Mon 5/6

1 stop6h 15m

$148

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Tue 4/16

1 stop7h 22m

Ontario

Wed 4/17

1 stop5h 26m

$298

Flights are sorted by cheapest first

Deals found on 3/26

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

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated March 28, 2024.
Read reviews from past customers who have flown Frontier, United Airlines and American Airlines from Missouri to Ontario. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
9,127 reviews

Food

7.3

Comfort

7.9

Entertainment

7.4

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

8.1
Very good
9,127 reviews
8.1
Very good
9,127 reviews

Food

7.3

Comfort

7.9

Entertainment

7.4

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

8.1
Very good
11,402 reviews
8.1
Very good
9,127 reviews

Food

7.3

Comfort

7.9

Entertainment

7.4

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

7.4
Good
11,481 reviews
8.1
Very good
9,127 reviews

Food

7.3

Comfort

7.9

Entertainment

7.4

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

7.3
Good
15,181 reviews
8.1
Very good
9,127 reviews

Food

7.3

Comfort

7.9

Entertainment

7.4

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

6.3
Okay
4,263 reviews
8.1
Very good
9,127 reviews

Food

7.3

Comfort

7.9

Entertainment

7.4

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

Related info for your journey

Find useful and relevant information for your journey from Missouri to Ontario. 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 into for flights to Ontario from Missouri?

    For a flight from Missouri to Ontario, you will be flying into Ontario. Ontario (ONT) is just 3.1 mi from the center of the city.

  • Can I find flights from Missouri to Ontario for under $100 on Cheapflights?

    Yes, there are multiple flights from Missouri to Ontario for under $100. The cheapest flight booked recently is on Frontier for just $75, but on average you can expect to pay $107.

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

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

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

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

  • What does STL to ONT mean?

    This is defined as Lambert-St Louis Airport (STL) and Ontario Airport (ONT). Codes like Ontario Airport are often used to just call airports uniquely. Kansas City Airport (MCI), Springfield-Branson Airport (SGF), Columbia Regional Airport (COU), Kansas City Downtown Airport (MKC), Branson Airport (BKG) are other airports near this flight route and their unique identifiers/IATA codes.

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

    The amount of baggage you can bring 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 Missouri to Ontario with specific airlines?

    Yes, Cheapflights allows you to browse and filter 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 Missouri to Ontario that include hotel bookings?

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

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

    After entering your origin and destination, apply the non-stop filter on the search result page to see available direct flights.

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

    Yes. Cheapflights offers flight deals from Missouri to Ontario 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 Missouri to Ontario that allow pets onboard?

    Many airlines do 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.

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

    The Missouri to Ontario flight deals you see on this page were last updated on 3/28.

See more FAQs

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Alternative routes for Missouri to Ontario
See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from Missouri to Ontario

Discover the top 5 airlines that operate flights from Missouri to Ontario. 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 3,228,805 searches. Data last updated March 28, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$118Average$242FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$127Average$231FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
DeltaCheapest$185Average$421FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$267Average$525FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$277Average$565FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Search flights from Missouri to Ontario by cabin class

Find flights from Missouri to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.

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 Missouri to Ontario?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Missouri to Ontario. 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 Missouri to Ontario?

Millions of users choose and trust Cheapflights to book the best flight deals from Missouri to Ontario for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Yes! Cheapflights helps users easily find flights from Missouri to Ontario with no change fees.

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

Not ready to book yet? You can track prices for flights from Missouri to Ontario on Cheapflights with our Price Alert feature and get notified when better prices are available.

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

Yes, you can often find last-minute deals on Missouri to Ontario 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 can I compare prices from different travel booking sites for flights from Missouri to Ontario?

Cheapflights aggregates prices from various travel booking sites. This allows you to compare prices and choose the best deal.

Can I find deals for flights from Missouri to Ontario that offer flexible cancellation policies?

Cancellation policies vary by airline and fare type. After entering your flight details, you can view the cancellation policies for each deal in the search results. Some deals may offer flexibility in terms of cancellation and changes.

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