ONT

$65 Find Cheap Flights from Missouri to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 1/12. 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.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$130
Overall average: $170
Frontier
Sat 2/14Tue 2/17
STL - ONT • 1 stop
Cheapest one-way
$65
Typical prices: $278-$503
Frontier
Mon 1/12
STL - ONT • 1 stop
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Flight Deals
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Flight Deals

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.

Recent round-trip flight deals from Missouri to Ontario

Sat, Feb 14 - Tue, Feb 17
Frontier Logo
7:43 pm - 11:59 pmSTL-ONT
6h 16m1 stop
Frontier Logo
7:00 am - 10:02 amONT-STL
25h 02m1 stop
$130Frontier
Find Deal
Fri, Dec 5 - Wed, Dec 10
Frontier Logo
10:44 pm - 9:17 pmSTL-ONT
24h 33m1 stop
Frontier Logo
6:15 am - 12:12 pmONT-STL
27h 57m1 stop
$134Frontier
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Thu, Dec 11 - Sun, Dec 14
Frontier Logo
8:09 pm - 2:25 pmMCI-ONT
20h 16m1 stop
Frontier Logo
4:01 pm - 7:50 pmONT-MCI
25h 49m1 stop
$134Frontier
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Fri, Dec 5 - Sat, Dec 6
Frontier Logo
1:16 pm - 9:17 pmSTL-ONT
10h 01m1 stop
Frontier Logo
6:15 am - 12:12 pmONT-STL
27h 57m1 stop
$138Frontier
Find Deal
Sat, Jan 31 - Mon, Feb 2
Multiple Airlines Logo
7:00 am - 6:40 pmMCI-ONT
13h 40m1 stop
Multiple Airlines Logo
6:20 am - 7:46 pmONT-MCI
11h 26m1 stop
$177Multiple Airlines
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Fri, Dec 5 - Tue, Dec 9
Multiple Airlines Logo
2:48 pm - 2:25 pmMCI-ONT
25h 37m1 stop
Multiple Airlines Logo
6:15 am - 8:44 pmONT-MCI
12h 29m1 stop
$195Multiple Airlines
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Wed, Nov 26 - Mon, Dec 1
American Airlines Logo
8:25 am - 2:02 pmSGF-ONT
7h 37m1 stop
American Airlines Logo
11:59 pm - 8:55 amONT-SGF
6h 56m1 stop
$339American Airlines
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Sat, Feb 28 - Wed, Mar 4
American Airlines Logo
12:10 pm - 6:40 pmSGF-ONT
8h 30m1 stop
American Airlines Logo
7:10 am - 4:02 pmONT-SGF
6h 52m1 stop
$349American Airlines
Find Deal
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
8:54 am - 8:50 pmJLN-ONT
13h 56m2 stops
United Airlines Logo
1:45 pm - 11:28 pmONT-JLN
7h 43m1 stop
$354United Airlines
Find Deal
Tue, Dec 16 - Mon, Dec 29
United Airlines Logo
2:55 pm - 9:49 pmSGF-ONT
8h 54m1 stop
United Airlines Logo
11:59 pm - 10:49 amONT-SGF
8h 50m1 stop
$379United Airlines
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Useful Info

Good to know

Low seasonFebruary
Cheapest flight$65
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 11% increase in price.
Flight from St. Louis to Ontario

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

Ontario (ONT)