Cheap flights from Ontario to North America from $33
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to North America departing on 2/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Fly from
Fly to
Route
Depart
Return
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Mon 11/9
12:01 pm-1:36 pm
Nonstop1h 35m
San Francisco
Mon 11/23
10:59 pm-12:24 am
Nonstop1h 25m
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Thu 11/12
12:01 pm-1:36 pm
Nonstop1h 35m
San Francisco
Fri 11/13
6:04 pm-7:30 pm
Nonstop1h 26m
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Sat 11/14
1:35 pm-3:05 pm
Nonstop1h 30m
San Francisco
Sat 11/14
6:50 pm-8:15 pm
Nonstop1h 25m
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Wed 11/11
1:35 pm-3:05 pm
Nonstop1h 30m
San Francisco
Wed 11/11
6:50 pm-8:15 pm
Nonstop1h 25m
OntarioDenver
ONT Ontario - DEN Denver Intl
ONTDEN
Ontario
Wed 10/28
7:25 am-2:32 pm
1 stop6h 07m
Denver Intl
Sat 10/31
9:17 am-10:42 am
Nonstop2h 25m
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Sat 11/7
5:45 am-9:25 am
1 stop3h 40m
San Francisco
Tue 11/10
10:25 am-4:10 pm
1 stop5h 45m
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Sat 11/7
5:45 am-9:25 am
1 stop3h 40m
San Francisco
Wed 11/11
5:05 am-12:10 pm
1 stop7h 05m
OntarioSeattle
ONT Ontario - SEA Seattle/Tacoma Intl
ONTSEA
Ontario
Sat 12/5
6:39 am-9:45 am
Nonstop3h 06m
Seattle/Tacoma Intl
Tue 12/8
8:37 am-11:13 am
Nonstop2h 36m
OntarioSeattle
ONT Ontario - SEA Seattle/Tacoma Intl
ONTSEA
Ontario
Mon 12/21
8:59 pm-11:51 pm
Nonstop2h 52m
Seattle/Tacoma Intl
Tue 1/5
8:05 pm-10:41 pm
Nonstop2h 36m
OntarioSeattle
ONT Ontario - SEA Seattle/Tacoma Intl
ONTSEA
Ontario
Sun 12/20
8:59 pm-11:51 pm
Nonstop2h 52m
Seattle/Tacoma Intl
Thu 1/7
8:05 pm-10:41 pm
Nonstop2h 36m
How to get the cheapest flight ticket from Ontario to North America
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to North America?
The month of February is, on average, the cheapest month to fly to North America from Ontario, with most prices found around $322. If you are unable to visit North America during the month of February, then departing from Ontario during the month January is also very affordable. Most momondo users find prices during this month for around $325.
What is the cheapest day to depart on your flight to North America?
The cheapest day to depart from Ontario to North America is on a Tuesday. Travelers who choose to depart for North America on a Tuesday will often find tickets for as low as $431. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to North America on Sunday is $487.
What is the cheapest Ontario to North America flight route?
Fly from Ontario to San Francisco for the best Ontario - North America flight prices
How far in advance should I book a flight from Ontario to North America?
You are more likely to see cheaper flights to North America from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to North America for around $396 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to North America from Ontario for as low as $270 on momondo.
What cabin class options are available on Ontario to North America flights?
There are 4 cabin classes available to choose from on Ontario to North America flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Can stopping save me money on Ontario to North America flights?
No. A direct flight is the cheapest option for a flight between Ontario to North America.
What is the cheapest airline that flies from Ontario to North America?
Southwest, Alaska Airlines, and Frontier are the most popular carriers operating from Ontario to North America
What airlines fly to North America?
American Airlines, United Airlines and Delta are the top three most popular airlines that fly to North America from Ontario according to our data. American Airlines is the first choice among our users, with 29% of people opting to fly with this airline when traveling to North America. Keep in mind that there are 17 different airlines that fly to North America on a routine basis, so you have a few additional options to choose from.
How many flights depart from Ontario to North America on average per day?
As of October 2026, there are 64 flights per day flying from Ontario to North America. The most common time of day flights depart is 12:00PM, with 44% of flights taking off in the afternoon.
How many flights depart from Ontario to North America on average per week?
As of October 2026, 448 flights take off from Ontario and land in North America each week. The most common flight departure day for this route is Tue, with 19% of weekly flights taking off on this day.
Cheap Ontario to North America flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to North America
Frequently asked questions about flying from Ontario to North America
When did momondo last update prices for flights from Ontario Airport to North America?
Prices for flights from Ontario Airport to North America are updated daily.
How many operators does momondo search for flights from Ontario Airport to North America?
The number of operators available for flights from Ontario Airport to North America is 10 as of October 2026.
How old do you have to be to fly from Ontario Airport to North America?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to North America.
What documentation or ID do you need to fly to North America?
The travel and health documents you'll need for your trip to North America may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at North America. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Ontario to North America?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Ontario to North America is Airbus A321neo (15.08% of total bookings). The next most popular plane models are Airbus A320neo (13.63%), Boeing 737 MAX 8 (11.73%), and Airbus A321-100/200 (11.54%).
Best airlines flying from Ontario to North America
Compare and see reviews for airlines that fly from Ontario to North America with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $50 | Free Cancellation | Rating 5.5 2,553 reviews | |||
| PriceFrom $91 | Free Cancellation | Rating 7.9 13,031 reviews | |||
| PriceFrom $117 | Free Cancellation | Rating 7.4 10,302 reviews | |||
| PriceFrom $120 | Free Cancellation | Rating 7.1 3,046 reviews | |||
| PriceFrom $128 | Free Cancellation | Rating 7.8 8,633 reviews | |||
| PriceFrom $172 | Free Cancellation | Rating 7.0 801 reviews | |||
| PriceFrom $204 | Free Cancellation | Rating 7.9 4,214 reviews | |||
| PriceFrom $224 | Free Cancellation | Rating 7.0 12,130 reviews | |||
| PriceFrom $259 | Free Cancellation | Rating 6.6 1,129 reviews | |||
| PriceFrom $313 | Free Cancellation | Rating 7.1 11,732 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Ontario to North America?
It is quick and easy to find Ontario to North America flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to North America that suits you.
Can I find flights from Ontario to North America with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to North America from Ontario with this policy.
How can momondo help me find flights from Ontario to North America?
momondo provides multiple filters to help you find the best flight to North America from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Ontario to North America right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Ontario to North America flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.