How does KAYAK find such low prices on flights from Missouri to Ontario?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Missouri to Ontario. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Missouri to Ontario?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Missouri is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Missouri to Ontario?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Missouri with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Missouri to Ontario?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Missouri up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$72 CHEAP FLIGHTS from Missouri to Ontario

ONT

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Cheap Flights from Missouri to Ontario

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Missouri to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Missouri to Ontario

Mon, Oct 27 - Mon, Nov 3

12:38 pm - 10:05 pmSTL-ONT

11h 27m1 stop

4:05 pm - 9:07 amONT-STL

15h 02m1 stop

$144Frontier

Find Deal

Sat, Oct 18 - Tue, Oct 21

4:51 pm - 8:42 pmSTL-ONT

5h 51m1 stop

7:04 am - 9:07 amONT-STL

24h 03m1 stop

$145Frontier

Find Deal

Tue, Oct 14 - Wed, Oct 22

7:52 pm - 11:50 pmSTL-ONT

5h 58m1 stop

1:31 pm - 12:03 amONT-STL

8h 32m1 stop

$216Multiple Airlines

Find Deal

Fri, Dec 12 - Mon, Dec 15

7:00 am - 1:31 pmMCI-ONT

8h 31m1 stop

4:51 pm - 12:40 amONT-MCI

5h 49m1 stop

$241Multiple Airlines

Find Deal

Wed, Oct 29 - Wed, Nov 5

7:05 am - 9:55 amMCI-ONT

4h 50m1 stop

5:45 am - 1:00 pmONT-MCI

5h 15m1 stop

$268Southwest

Find Deal

Wed, Nov 12 - Tue, Nov 18

7:00 am - 3:17 pmMCI-ONT

10h 17m1 stop

7:20 am - 3:54 pmONT-MCI

6h 34m1 stop

$273Alaska Airlines

Find Deal

Wed, Oct 29 - Wed, Nov 5

7:05 am - 9:55 amMCI-ONT

4h 50m1 stop

8:40 am - 5:20 pmONT-MCI

6h 40m2 stops

$274Southwest

Find Deal

Thu, Oct 23 - Tue, Oct 28

5:57 pm - 11:51 pmMCI-ONT

7h 54m1 stop

11:59 am - 2:02 pmONT-MCI

24h 03m1 stop

$291Alaska Airlines

Find Deal

Thu, Oct 23 - Tue, Oct 28

3:03 pm - 9:24 pmMCI-ONT

8h 21m1 stop

6:38 pm - 8:56 amONT-MCI

12h 18m2 stops

$297United Airlines

Find Deal

Wed, Oct 15 - Sun, Oct 19

7:45 am - 5:23 pmSGF-ONT

11h 38m2 stops

7:02 am - 5:45 pmONT-SGF

8h 43m1 stop

$363United Airlines

Find Deal

Cheapest round-trip

$144

Overall average: $346

Frontier

Mon 10/27Mon 11/3

STL - ONT • 1 stop

Cheapest one-way

$72

Typical prices: $65-240

Frontier

Fri 11/7

STL - ONT • 1 stop

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Ontario!

Useful Info

How does KAYAK find such low prices on flights from Missouri to Ontario?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Missouri to Ontario.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Missouri to Ontario?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Missouri is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Missouri to Ontario?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Missouri with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Missouri to Ontario?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Missouri up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight to Ontario

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Ontario

Ontario (ONT)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.

ONT

$72 Find Cheap Flights from Missouri to Ontario

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

Cheap Flights from Missouri to Ontario

Recent round-trip flight deals from Missouri to Ontario

Recent one-way flight deals from Missouri to Ontario

Recent last minute flight deals from Missouri to Ontario

Everything you should know

FAQs for booking flights from Missouri to Ontario

How does KAYAK find such low prices on flights from Missouri to Ontario?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Missouri to Ontario.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Missouri to Ontario?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Missouri is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Missouri to Ontario?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Missouri with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Missouri to Ontario?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Missouri up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

Cabin class types available on flights to Missouri

Complete your trip to Ontario with a hotel stay or car rental

Find direct flights for Ontario

Flights to other popular destinations

Flights from domestic origins to Ontario

Choose which airport to fly into in Ontario

Find deals for your return flight