$19 Find deals on international flights 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 7/8. 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

Book Cheap International Flights Deals to Ontario

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights 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 international flight deals to Ontario

Fri, Sep 12 - Wed, Sep 17
American Airlines Logo
12:30 pm - 9:21 amGUA-ONT
21h 51m2 stops
American Airlines Logo
2:54 pm - 11:26 amONT-GUA
19h 32m2 stops
$227American Airlines
Find Deal
Mon, Jul 21 - Mon, Aug 4
American Airlines Logo
12:40 am - 6:08 pmGUA-ONT
18h 28m2 stops
American Airlines Logo
12:59 am - 7:50 pmONT-GUA
17h 51m2 stops
$232American Airlines
Find Deal
Tue, Jul 22 - Wed, Jul 30
Frontier Logo
3:25 pm - 11:50 pmCUN-ONT
10h 25m1 stop
Frontier Logo
12:59 am - 4:20 pmONT-CUN
13h 21m1 stop
$268Frontier
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Wed, Jul 16 - Mon, Jul 21
United Airlines Logo
6:15 am - 12:32 pmYYC-ONT
7h 17m1 stop
United Airlines Logo
1:19 pm - 10:26 pmONT-YYC
8h 07m1 stop
$271United Airlines
Find Deal
Tue, Jul 22 - Sat, Jul 26
Delta Logo
7:55 am - 4:29 pmYYC-ONT
9h 34m1 stop
Delta Logo
1:15 pm - 10:57 pmONT-YYC
8h 42m1 stop
$272Delta
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Wed, Aug 20 - Fri, Aug 29
Volaris Logo
9:04 pm - 11:07 pmGDL-ONT
3h 03mnonstop
Volaris Logo
9:11 pm - 1:16 amONT-GDL
3h 05mnonstop
$273Volaris
Find Deal
Sat, Aug 16 - Sat, Aug 30
Frontier Logo
5:15 pm - 7:18 pmGDL-ONT
3h 03mnonstop
Frontier Logo
1:09 am - 5:14 amONT-GDL
3h 05mnonstop
$274Frontier
Find Deal
Fri, Aug 15 - Thu, Aug 21
Volaris Logo
9:10 pm - 11:13 pmGDL-ONT
3h 03mnonstop
Volaris Logo
1:09 am - 5:14 amONT-GDL
3h 05mnonstop
$278Volaris
Find Deal
Mon, Aug 25 - Wed, Sep 3
Delta Logo
7:55 am - 4:08 pmYYC-ONT
9h 13m1 stop
Delta Logo
1:15 pm - 10:57 pmONT-YYC
8h 42m1 stop
$287Delta
Find Deal
Fri, Oct 31 - Mon, Nov 10
United Airlines Logo
8:40 am - 5:34 pmSJO-ONT
9h 54m1 stop
United Airlines Logo
6:38 pm - 8:32 amONT-SJO
11h 54m1 stop
$318United Airlines
Find Deal
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Good to know

Low seasonFebruary
High seasonNovember
Cheapest flight$19
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from San Francisco to Ontario

FAQs for booking Worldwide to Ontario flights

  • How does KAYAK find such low prices on flights from Worldwide 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 Worldwide to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Worldwide 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 Worldwide 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 Worldwide with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Worldwide 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 Worldwide 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

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