ONT

$83 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 9/11. 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

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Flights 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

Wed, Aug 13 - Tue, Aug 19
Frontier Logo
7:29 pm - 11:50 pmSTL-ONT
6h 21m1 stop
Frontier Logo
12:59 am - 9:11 amONT-STL
6h 12m1 stop
$138Frontier
Find Deal
Fri, Aug 15 - Sun, Aug 17
Frontier Logo
7:29 pm - 11:50 pmSTL-ONT
6h 21m1 stop
Frontier Logo
12:59 am - 9:11 amONT-STL
6h 12m1 stop
$171Frontier
Find Deal
Thu, Aug 28 - Tue, Sep 2
Alaska Airlines Logo
4:55 pm - 11:53 pmMCI-ONT
8h 58m1 stop
Alaska Airlines Logo
5:49 pm - 4:01 pmONT-MCI
20h 12m1 stop
$204Alaska Airlines
Find Deal
Thu, Aug 21 - Mon, Aug 25
American Airlines Logo
2:51 pm - 6:17 pmMCI-ONT
5h 26m1 stop
American Airlines Logo
4:54 pm - 11:59 pmONT-MCI
5h 05m1 stop
$205American Airlines
Find Deal
Thu, Sep 4 - Tue, Sep 9
Southwest Logo
11:20 am - 2:15 pmMCI-ONT
4h 55m1 stop
Southwest Logo
10:00 am - 8:20 pmONT-MCI
8h 20m2 stops
$210Southwest
Find Deal
Thu, Sep 4 - Tue, Sep 9
American Airlines Logo
10:46 am - 6:16 pmMCI-ONT
9h 30m2 stops
American Airlines Logo
6:10 am - 5:25 pmONT-MCI
9h 15m2 stops
$215American Airlines
Find Deal
Tue, Aug 5 - Thu, Aug 14
Alaska Airlines Logo
3:34 pm - 12:15 amMCI-ONT
10h 41m1 stop
Alaska Airlines Logo
2:21 pm - 11:35 pmONT-MCI
7h 14m1 stop
$242Alaska Airlines
Find Deal
Mon, Aug 4 - Wed, Aug 13
Delta Logo
5:45 am - 8:47 amMCI-ONT
5h 02m1 stop
Delta Logo
6:05 am - 1:18 pmONT-MCI
5h 13m1 stop
$257Delta
Find Deal
Sat, Aug 9 - Wed, Aug 13
Delta Logo
6:40 am - 12:14 pmMCI-ONT
7h 34m1 stop
Delta Logo
4:50 pm - 11:59 pmONT-MCI
5h 09m1 stop
$273Delta
Find Deal
Wed, Nov 19 - Mon, Nov 24
Southwest Logo
5:50 am - 9:15 amMCI-ONT
5h 25m1 stop
Southwest Logo
6:00 am - 2:40 pmONT-MCI
6h 40m1 stop
$306Southwest
Find Deal
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Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$83
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 5% lower on average.
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)

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