$42 Find deals on international flights to Ontario - Compare and Save

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 8/12. 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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Flight 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

Sat, Jul 4 - Mon, Jul 6
Volaris Logo
4:32 pm - 11:05 pm
CUN
-
ONT
8h 33m
1 stop
Volaris Logo
12:55 am - 3:28 pm
ONT
-
CUN
12h 33m
1 stop
$298Volaris
Wed, Aug 5 - Sat, Aug 8
Multiple Airlines Logo
8:45 am - 11:50 pm
YYC
-
ONT
16h 05m
1 stop
Multiple Airlines Logo
6:00 am - 2:45 pm
ONT
-
YYC
7h 45m
1 stop
$308Multiple Airlines
Tue, Oct 6 - Tue, Oct 20
Frontier Logo
11:55 am - 8:54 pm
MEX
-
ONT
9h 59m
1 stop
Frontier Logo
6:00 am - 5:30 pm
ONT
-
MEX
10h 30m
1 stop
$311Frontier
Thu, Jul 2 - Tue, Jul 7
Volaris Logo
4:32 pm - 11:05 pm
CUN
-
ONT
8h 33m
1 stop
Volaris Logo
9:36 pm - 9:55 am
ONT
-
CUN
10h 19m
1 stop
$313Volaris
Thu, Jul 2 - Mon, Jul 6
Volaris Logo
12:00 pm - 11:05 pm
MEX
-
ONT
12h 05m
1 stop
Volaris Logo
12:55 am - 9:45 am
ONT
-
MEX
7h 50m
1 stop
$313Volaris
Sat, Oct 17 - Wed, Oct 21
Frontier Logo
8:46 am - 4:10 pm
GDL
-
ONT
8h 24m
1 stop
Frontier Logo
6:00 am - 4:25 pm
ONT
-
GDL
9h 25m
1 stop
$314Frontier
Fri, Aug 28 - Tue, Sep 1
United Airlines Logo
1:41 pm - 6:11 pm
YYC
-
ONT
5h 30m
1 stop
United Airlines Logo
6:08 am - 12:30 pm
ONT
-
YYC
5h 22m
1 stop
$345United Airlines
Wed, Sep 2 - Sat, Sep 12
Southwest Logo
1:40 pm - 10:05 pm
SJO
-
ONT
9h 25m
1 stop
Southwest Logo
6:55 am - 6:00 pm
ONT
-
SJO
10h 05m
2 stops
$483Southwest
Sun, Sep 13 - Fri, Sep 18
United Airlines Logo
6:15 am - 9:59 pm
GUA
-
ONT
16h 44m
1 stop
United Airlines Logo
6:00 am - 6:49 pm
ONT
-
GUA
11h 49m
1 stop
$519United Airlines
Thu, Aug 20 - Sat, Aug 29
JetBlue Logo
11:30 am - 10:35 pm
DUB
-
ONT
19h 05m
1 stop
JetBlue Logo
11:24 pm - 9:00 am
ONT
-
DUB
25h 36m
1 stop
$666JetBlue
Booking Insights

KAYAK's insights & trends for flights to Ontario

Get data-powered insights and trends for flights to Ontario to help you find the cheapest flights, the best time to fly and much more.

What are the most popular airlines flying to Ontario?

The most popular airline among KAYAK users flying to Ontario is Frontier, followed by United Airlines and Alaska Airlines.

Frontier
Frontier
#1 most popular
United Airlines
United Airlines
#2 most popular
Alaska Airlines
Alaska Airlines
#3 most popular
American Airlines
American Airlines
#4 most popular
Find deals

Good to know

Low seasonJanuary
Cheapest flight$42
Best time to beat the crowds but there is an average 2% increase in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from Denver 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

Ontario (ONT)