How many flights depart from Ontario to North America on average per week?

As of September 2026, 324 flights take off from Ontario and land in North America each week. The most common flight departure day for this route is Mon, with 23% of weekly flights taking off on this day.

What is the cheapest airline that flies from Ontario to North America?

United Airlines, Southwest, and Alaska Airlines are the most popular carriers operating from Ontario to North America

How many flights depart from Ontario to North America on average per day?

As of September 2026, there are 46 flights per day flying from Ontario to North America. The most common time of day flights depart is 12:00PM, with 48% of flights taking off at noon.

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 28% of people opting to fly with this airline when traveling to North America. Keep in mind that there are 12 different airlines that fly to North America on a routine basis, so you have a few additional options to choose from.

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 September 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.

$29 Cheap Flights from Ontario to North America in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to North America

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:01 pm - 1:32 pmONT Ontario-SFO San Francisco

1h 31mnonstop

6:02 pm - 7:28 pmSFO San Francisco-ONT Ontario

1h 26mnonstop

$60Frontier

Fri, Oct 23 - Fri, Oct 30

12:01 pm - 1:32 pmONT Ontario-SFO San Francisco

1h 31mnonstop

6:02 pm - 7:40 pmSFO San Francisco-ONT Ontario

1h 38mnonstop

$61Frontier

Fri, Oct 23 - Mon, Oct 26

1:52 pm - 3:21 pmONT Ontario-SFO San Francisco

1h 29mnonstop

9:25 pm - 10:51 pmSFO San Francisco-ONT Ontario

1h 26mnonstop

$117United Airlines

Sat, Oct 24 - Sat, Oct 24

6:07 am - 7:33 amONT Ontario-SFO San Francisco

1h 26mnonstop

9:25 pm - 10:51 pmSFO San Francisco-ONT Ontario

1h 26mnonstop

$117United Airlines

Thu, Oct 15 - Sat, Oct 17

11:52 am - 3:18 pmONT Ontario-DEN Denver Intl

2h 26mnonstop

7:07 am - 1:16 pmDEN Denver Intl-ONT Ontario

7h 09m1 stop Seattle/Tacoma Intl

$122Multiple Airlines

Thu, Oct 22 - Sat, Oct 31

6:25 am - 9:46 amONT Ontario-DEN Denver Intl

2h 21mnonstop

6:37 pm - 11:18 amDEN Denver Intl-ONT Ontario

17h 41m1 stop Seattle/Tacoma Intl

$128Multiple Airlines

Thu, Oct 29 - Mon, Nov 2

1:30 pm - 5:35 pmONT Ontario-SFO San Francisco

4h 05m1 stop Las Vegas Harry Reid Intl

5:00 am - 8:45 amSFO San Francisco-ONT Ontario

3h 45m1 stop Las Vegas Harry Reid Intl

$151Southwest

Thu, Oct 15 - Sat, Oct 17

6:50 pm - 12:05 amONT Ontario-SFO San Francisco

5h 15m1 stop Las Vegas Harry Reid Intl

4:15 pm - 10:55 pmSFO San Francisco-ONT Ontario

6h 40m1 stop Phoenix Sky Harbor Intl

$151Southwest

Thu, Nov 5 - Mon, Nov 9

2:13 pm - 4:56 pmONT Ontario-SEA Seattle/Tacoma Intl

2h 43mnonstop

7:30 am - 10:17 amSEA Seattle/Tacoma Intl-ONT Ontario

2h 47mnonstop

$157Alaska Airlines

Sat, Oct 17 - Wed, Oct 21

6:02 am - 8:49 amONT Ontario-SEA Seattle/Tacoma Intl

2h 47mnonstop

3:28 pm - 6:00 pmSEA Seattle/Tacoma Intl-ONT Ontario

2h 32mnonstop

$157Alaska Airlines

Sat, Oct 10 - Sat, Oct 24

Cheap last minute flights

Enter your travel dates to find the best prices.

12:07 pm - 1:43 pmONT Ontario-SFO San Francisco

1h 36mnonstop

6:02 pm - 7:36 pmSFO San Francisco-ONT Ontario

1h 34mnonstop

$73Frontier

Thu, Sep 17 - Mon, Sep 21

12:07 pm - 1:43 pmONT Ontario-SFO San Francisco

1h 36mnonstop

6:02 pm - 7:36 pmSFO San Francisco-ONT Ontario

1h 34mnonstop

$81Frontier

Thu, Sep 17 - Mon, Sep 21

6:08 am - 7:35 amONT Ontario-SFO San Francisco

1h 27mnonstop

9:25 pm - 10:51 pmSFO San Francisco-ONT Ontario

1h 26mnonstop

$252United Airlines

Sat, Sep 19 - Mon, Oct 5

9:01 am - 10:30 amONT Ontario-SFO San Francisco

1h 29mnonstop

9:17 pm - 10:51 pmSFO San Francisco-ONT Ontario

1h 34mnonstop

$257United Airlines

Wed, Sep 16 - Sun, Sep 20

5:15 am - 10:10 amONT Ontario-SFO San Francisco

4h 55m1 stop Phoenix Sky Harbor Intl

10:40 am - 5:35 pmSFO San Francisco-ONT Ontario

6h 55m1 stop Phoenix Sky Harbor Intl

$277Southwest

Mon, Sep 21 - Tue, Sep 22

2:55 pm - 6:25 pmONT Ontario-SFO San Francisco

3h 30m1 stop Las Vegas Harry Reid Intl

5:40 am - 11:35 amSFO San Francisco-ONT Ontario

5h 55m1 stop Phoenix Sky Harbor Intl

$277Southwest

Sat, Sep 19 - Sun, Sep 20

1:04 pm - 7:11 pmONT Ontario-SFO San Francisco

6h 07m1 stop Phoenix Sky Harbor Intl

8:00 am - 12:06 pmSFO San Francisco-ONT Ontario

4h 06m1 stop Phoenix Sky Harbor Intl

$277American Airlines

Thu, Sep 17 - Tue, Sep 22

1:04 pm - 7:11 pmONT Ontario-SFO San Francisco

6h 07m1 stop Phoenix Sky Harbor Intl

5:50 am - 12:03 pmSFO San Francisco-ONT Ontario

6h 13m1 stop Phoenix Sky Harbor Intl

$277American Airlines

Thu, Sep 17 - Sat, Sep 19

6:00 am - 6:01 pmONT Ontario-ORD Chicago O'Hare Intl

10h 01m1 stop Seattle/Tacoma Intl

7:35 am - 12:36 pmORD Chicago O'Hare Intl-ONT Ontario

7h 01m1 stop Salt Lake City

$277Delta

Thu, Sep 17 - Tue, Oct 6

6:00 am - 8:30 pmONT Ontario-ORD Chicago O'Hare Intl

12h 30m2 stops Seattle/Tacoma Intl Detroit Metropolitan Wayne County

7:15 pm - 11:55 pmORD Chicago O'Hare Intl-ONT Ontario

6h 40m1 stop Salt Lake City

$282Delta

Thu, Sep 17 - Tue, Oct 6

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Frontier flights from Ontario to North America

Our best Frontier deals on Ontario to North America flight tickets

Frontier

Oct 23

ONT12:01 pmOntario

1h 31m

SFO1:32 pmSan Francisco

Oct 30

SFO6:02 pmSan Francisco

1h 26m

ONT7:28 pmOntario

$60

Frontier

Oct 23

ONT12:01 pmOntario

1h 31m

SFO1:32 pmSan Francisco

Oct 26

SFO6:02 pmSan Francisco

1h 38m

ONT7:40 pmOntario

$61

Frontier

Oct 2

ONT12:07 pmOntario

1h 36m

SFO1:43 pmSan Francisco

Oct 5

SFO6:02 pmSan Francisco

1h 34m

ONT7:36 pmOntario

$64

United Airlines flights from Ontario to North America

Our best United Airlines deals on Ontario to North America flight tickets

United Airlines

Oct 15

ONT6:07 amOntario

1h 26m

SFO7:33 amSan Francisco

Oct 17

SFO9:25 pmSan Francisco

1h 26m

ONT10:51 pmOntario

$117

United Airlines

Jan 5

ONT6:53 pmOntario

8h 41m

1 stop

ORD5:34 amChicago O'Hare Intl

Jan 7

ORD12:40 pmChicago O'Hare Intl

7h 07m

1 stop

ONT5:47 pmOntario

$215

United Airlines

Sep 18

ONT1:56 pmOntario

9h 03m

1 stop

ORD12:59 amChicago O'Hare Intl

Oct 6

ORD8:20 pmChicago O'Hare Intl

4h 29m

ONT10:49 pmOntario

$267

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Fri 10/23

12:01 pm-1:32 pm

Nonstop1h 31m

San Francisco

Fri 10/30

6:02 pm-7:28 pm

Nonstop1h 26m

$60

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Fri 10/23

12:01 pm-1:32 pm

Nonstop1h 31m

San Francisco

Mon 10/26

6:02 pm-7:40 pm

Nonstop1h 38m

$61

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Sat 10/24

1:52 pm-3:21 pm

Nonstop1h 29m

San Francisco

Sat 10/24

9:25 pm-10:51 pm

Nonstop1h 26m

$117

Quickest round-trip

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Thu 10/15

6:07 am-7:33 am

Nonstop1h 26m

San Francisco

Sat 10/17

9:25 pm-10:51 pm

Nonstop1h 26m

$117

OntarioDenver

ONT Ontario - DEN Denver Intl

ONTDEN

Ontario

Thu 10/22

11:52 am-3:18 pm

Nonstop2h 26m

Denver Intl

Sat 10/31

7:07 am-1:16 pm

1 stop7h 09m

$122

OntarioDenver

ONT Ontario - DEN Denver Intl

ONTDEN

Ontario

Thu 10/29

6:25 am-9:46 am

Nonstop2h 21m

Denver Intl

Mon 11/2

6:37 pm-11:18 am

1 stop17h 41m

$128

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Thu 10/15

1:30 pm-5:35 pm

1 stop4h 05m

San Francisco

Sat 10/17

5:00 am-8:45 am

1 stop3h 45m

$151

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Thu 11/5

6:50 pm-12:05 am

1 stop5h 15m

San Francisco

Mon 11/9

4:15 pm-10:55 pm

1 stop6h 40m

$151

OntarioSeattle

ONT Ontario - SEA Seattle/Tacoma Intl

ONTSEA

Ontario

Sat 10/17

2:13 pm-4:56 pm

Nonstop2h 43m

Seattle/Tacoma Intl

Wed 10/21

7:30 am-10:17 am

Nonstop2h 47m

$157

OntarioSeattle

ONT Ontario - SEA Seattle/Tacoma Intl

ONTSEA

Ontario

Sat 10/10

6:02 am-8:49 am

Nonstop2h 47m

Seattle/Tacoma Intl

Sat 10/24

3:28 pm-6:00 pm

Nonstop2h 32m

$157

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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 $321. 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 $321.

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 $427. 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 $484.

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 $384 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.

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

Best Price Found	$29
Fastest flight time	1h 02m
Direct flights	Every day
Airports in North America	5,172 airports

The best one-way flight to North America from Ontario in the past 72 hours is $29. The best round-trip flight deal from Ontario to North America found on momondo in the last 72 hours is $60.

The fastest flight from Ontario to North America takes 1h 02m

Direct flights go from Ontario to North America every day.

There are 5,172 airports in North America. From Ontario there are direct flights to San Francisco (SFO).

Search flight deals

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 September 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 (15.66% of total bookings). The next most popular plane models are Airbus A320neo (13.38%), Airbus A321-100/200 (12.35%), and Boeing 737 MAX 8 (11.55%).

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
Frontier	PriceFrom $50	Free Cancellation	Rating 5.6 2,601 reviews	Search Frontier flights
Alaska Airlines	PriceFrom $91	Free Cancellation	Rating 7.9 12,932 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $100	Free Cancellation	Rating 7.4 10,210 reviews	Search United Airlines flights
JetBlue	PriceFrom $120	Free Cancellation	Rating 7.1 3,038 reviews	Search JetBlue flights
Delta	PriceFrom $128	Free Cancellation	Rating 7.8 8,570 reviews	Search Delta flights
Viva	PriceFrom $172	Free Cancellation	Rating 7.0 803 reviews	Search Viva flights
Southwest	PriceFrom $193	Free Cancellation	Rating 8.0 4,189 reviews	Search Southwest flights
American Airlines	PriceFrom $211	Free Cancellation	Rating 7.1 12,062 reviews	Search American Airlines flights
Volaris	PriceFrom $260	Free Cancellation	Rating 6.6 1,140 reviews	Search Volaris flights

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.

An easier way to manage your North America trip

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Popular cities

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Popular cities in North America

Flights to New Yorkfrom $73

Flights to Los Angelesfrom $49

Flights to Orlandofrom $56

Flights to Miamifrom $40

Flights to San Franciscofrom $43

Flights to Chicagofrom $50

Flights to Las Vegasfrom $39

Flights to Washington, D.C.from $40

Flights to Bostonfrom $103

Flights to Fort Lauderdalefrom $40

Flights to Atlantafrom $38

Flights to Dallasfrom $50

Cheap flights from Ontario to North America from $29

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 9/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Ontario to North America

Cheap round-trip flights

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Cheap last minute flights

Cheap direct flights

Big names and deals

Big names and deals

Filter for what you want

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Trusted and free

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Price Alerts

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Frontier flights from Ontario to North America

Our best Frontier deals on Ontario to North America flight tickets

United Airlines flights from Ontario to North America

Our best United Airlines deals on Ontario to North America flight tickets

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Use the filters below to find and compare flights from Ontario to North America that are best for you.

How to get the cheapest flight ticket from Ontario to North America

What is the cheapest month to fly to North America?

What is the cheapest day to depart on your flight to North America?

What is the cheapest Ontario to North America flight route?

How far in advance should I book a flight from Ontario to North America?

What cabin class options are available on Ontario to North America flights?

Can stopping save me money on Ontario to North America flights?

What is the cheapest airline that flies from Ontario to North America?

What airlines fly to North America?

How many flights depart from Ontario to North America on average per day?

How many flights depart from Ontario to North America on average per week?

Cheap Ontario to North America flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Airports in North America

Frequently asked questions about flying from Ontario to North America

Best airlines flying from Ontario to North America

Compare and see reviews for airlines that fly from Ontario to North America with momondo

Why use momondo?

An easier way to manage your North America trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to North America

Popular cities in North America

Popular flights according to clicks in the last 7 days on momondo

Ontario flight routes

According to popular flight searches on momondo this year

North America flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to North America

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to North America

List of cabin classes available on flights landing in North America. Availability may vary depending on flight origin and airline.

Complete your trip to North America

Explore popular destinations other users love

According to popular flight searches on momondo this year