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>

$95 CHEAP FLIGHTS from Missouri to Ontario

ONT

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

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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.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Missouri to Ontario

KAYAK's recommended round-trip deals from the most popular airlines that fly from Missouri to Ontario.

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

7:55 pm - 9:15 amSTL-ONT

15h 20m1 stop

12:59 am - 9:12 amONT-STL

6h 13m1 stop

$219Frontier

Find Deal

Sat, May 24 - Sun, Jun 1

7:24 pm - 11:51 pmSTL-ONT

6h 27m1 stop

12:59 am - 9:12 amONT-STL

6h 13m1 stop

$227Frontier

Find Deal

Fri, May 30 - Sun, Jun 1

7:52 pm - 11:50 pmSTL-ONT

5h 58m1 stop

12:59 am - 9:07 amONT-STL

6h 08m1 stop

$237Frontier

Find Deal

Tue, Sep 9 - Mon, Sep 22

6:32 pm - 10:57 pmSGF-ONT

6h 25m1 stop

11:59 pm - 8:45 amONT-SGF

6h 46m1 stop

$269American Airlines

Find Deal

Thu, Jul 31 - Mon, Aug 4

6:12 pm - 10:45 pmMCI-ONT

6h 33m1 stop

6:00 am - 2:15 pmONT-MCI

6h 15m1 stop

$294United Airlines

Find Deal

Tue, Jun 10 - Wed, Jun 11

6:40 am - 12:14 pmMCI-ONT

7h 34m1 stop

5:08 pm - 12:21 amONT-MCI

5h 13m1 stop

$299Delta

Find Deal

Tue, Jul 15 - Wed, Jul 23

2:34 pm - 6:12 pmMCI-ONT

5h 38m1 stop

12:59 am - 8:51 amONT-MCI

5h 52m1 stop

$303American Airlines

Find Deal

Wed, Jun 11 - Mon, Jun 16

3:35 pm - 11:59 pmSTL-ONT

10h 24m1 stop

6:00 am - 5:34 pmONT-STL

9h 34m1 stop

$306Hawaiian Airlines

Find Deal

Tue, Sep 9 - Tue, Sep 23

5:23 pm - 10:27 pmSTL-ONT

7h 04m1 stop

7:00 am - 3:58 pmONT-STL

6h 58m1 stop

$307Delta

Find Deal

Tue, Aug 5 - Sun, Aug 31

3:10 pm - 9:30 pmMCI-ONT

8h 20m1 stop

6:00 am - 4:12 pmONT-MCI

8h 12m2 stops

$323United Airlines

Find Deal

Wed, May 21 - Wed, May 28

Useful Info

Low season	February
High season	May
Cheapest flight	$95

Best time to beat the crowds but there is an average 2% increase in price.

Most popular time to fly and prices are also 7% lower on average.

Flight from St. Louis 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

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)

ONT

$95 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

Good to 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