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

As of August 2026, 411 flights take off from Ontario and land in North America each week. The most common flight departure day for this route is Fri, with 22% of weekly flights taking off on this day.

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

Frontier, United Airlines, and Southwest 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 August 2026, there are 58 flights per day flying from Ontario to North America. The most common time of day flights depart is 7:00AM, with 44% of flights taking off at noon.

What airlines fly to North America?

Frontier, United Airlines and Delta are the top three most popular airlines that fly to North America from Ontario according to our data. Frontier is the first choice among our users, with 32% of people opting to fly with this airline when traveling to North America. Keep in mind that there are 15 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 8 as of August 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.

$23 Cheap Flights from Ontario to North America in 2026

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.

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

1h 36mnonstop

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

1h 38mnonstop

$64Frontier

Fri, Oct 2 - Thu, Oct 8

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

1h 36mnonstop

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

1h 34mnonstop

$64Frontier

Fri, Oct 2 - Mon, Oct 5

8:00 am - 9:27 amONT Ontario-SFO San Francisco

1h 27mnonstop

6:30 pm - 8:01 pmSFO San Francisco-ONT Ontario

1h 31mnonstop

$117United Airlines

Sat, Sep 12 - Tue, Sep 15

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

1h 27mnonstop

6:30 pm - 8:01 pmSFO San Francisco-ONT Ontario

1h 31mnonstop

$117United Airlines

Thu, Sep 17 - Sat, Sep 19

5:45 am - 11:05 amONT Ontario-SFO San Francisco

5h 20m1 stop Las Vegas Harry Reid Intl

2:35 pm - 9:00 pmSFO San Francisco-ONT Ontario

6h 25m1 stop Phoenix Sky Harbor Intl

$151Southwest

Tue, Sep 29 - Wed, Sep 30

6:40 am - 1:15 pmONT Ontario-SFO San Francisco

6h 35m1 stop Phoenix Sky Harbor Intl

4:40 pm - 9:00 pmSFO San Francisco-ONT Ontario

4h 20m1 stop Las Vegas Harry Reid Intl

$151Southwest

Wed, Sep 30 - Wed, Sep 30

1:23 pm - 7:22 pmONT Ontario-DEN Denver Intl

4h 59m1 stop Phoenix Sky Harbor Intl

6:56 pm - 10:01 pmDEN Denver Intl-ONT Ontario

4h 05m1 stop Phoenix Sky Harbor Intl

$177American Airlines

Wed, Dec 16 - Wed, Jan 6

12:57 pm - 6:06 pmONT Ontario-DEN Denver Intl

4h 09m1 stop Phoenix Sky Harbor Intl

11:43 am - 4:07 pmDEN Denver Intl-ONT Ontario

5h 24m1 stop Phoenix Sky Harbor Intl

$177American Airlines

Thu, Jan 7 - Mon, Jan 11

5:44 pm - 8:40 pmONT Ontario-SEA Seattle/Tacoma Intl

2h 56mnonstop

10:58 am - 5:05 pmSEA Seattle/Tacoma Intl-ONT Ontario

6h 07m1 stop Santa Rosa Sonoma County

$183Multiple Airlines

Mon, Oct 5 - Wed, Oct 7

5:05 pm - 8:01 pmONT Ontario-SEA Seattle/Tacoma Intl

2h 56mnonstop

10:58 am - 5:05 pmSEA Seattle/Tacoma Intl-ONT Ontario

6h 07m1 stop Santa Rosa Sonoma County

$188Multiple Airlines

Tue, Oct 13 - Wed, Oct 14

Cheap last minute flights

Enter your travel dates to find the best prices.

3:40 pm - 7:56 pmONT Ontario-SFO San Francisco

4h 16m1 stop Las Vegas Harry Reid Intl

9:00 am - 10:29 amSFO San Francisco-ONT Ontario

1h 29mnonstop

$192Frontier

Tue, Aug 18 - Sun, Sep 6

3:13 pm - 4:40 pmONT Ontario-SFO San Francisco

1h 27mnonstop

9:00 am - 10:29 amSFO San Francisco-ONT Ontario

1h 29mnonstop

$192Frontier

Tue, Aug 18 - Sun, Sep 6

9:15 am - 8:05 pmONT Ontario-ORD Chicago O'Hare Intl

8h 50m1 stop Houston George Bush Intcntl

8:06 pm - 10:35 pmORD Chicago O'Hare Intl-ONT Ontario

4h 29mnonstop

$267United Airlines

Tue, Aug 18 - Fri, Aug 21

9:01 am - 6:35 pmONT Ontario-ORD Chicago O'Hare Intl

7h 34m1 stop San Francisco

8:06 pm - 10:35 pmORD Chicago O'Hare Intl-ONT Ontario

4h 29mnonstop

$267United Airlines

Tue, Aug 18 - Tue, Aug 25

9:43 am - 8:30 pmONT Ontario-ORD Chicago O'Hare Intl

8h 47m2 stops Salt Lake City Detroit Metropolitan Wayne County

11:17 am - 8:24 pmORD Chicago O'Hare Intl-ONT Ontario

11h 07m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

$267Delta

Tue, Aug 18 - Wed, Sep 9

11:56 am - 11:29 pmONT Ontario-ORD Chicago O'Hare Intl

9h 33m1 stop Seattle/Tacoma Intl

8:55 am - 8:24 pmORD Chicago O'Hare Intl-ONT Ontario

13h 29m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

$273Delta

Tue, Aug 18 - Wed, Sep 9

6:15 am - 2:22 pmONT Ontario-ORD Chicago O'Hare Intl

6h 07m1 stop Phoenix Sky Harbor Intl

6:00 am - 1:31 pmORD Chicago O'Hare Intl-ONT Ontario

9h 31m1 stop Dallas/Fort Worth

$277American Airlines

Fri, Aug 21 - Sun, Aug 23

12:59 pm - 10:00 pmONT Ontario-ORD Chicago O'Hare Intl

7h 01m1 stop Phoenix Sky Harbor Intl

5:00 am - 9:34 amORD Chicago O'Hare Intl-ONT Ontario

6h 34m1 stop Dallas/Fort Worth

$277American Airlines

Wed, Aug 19 - Thu, Aug 20

5:26 pm - 8:06 pmONT Ontario-SEA Seattle/Tacoma Intl

2h 40mnonstop

8:27 am - 11:08 amSEA Seattle/Tacoma Intl-ONT Ontario

2h 41mnonstop

$337Alaska Airlines

Sun, Aug 16 - Tue, Aug 18

6:02 am - 8:45 amONT Ontario-SEA Seattle/Tacoma Intl

2h 43mnonstop

12:09 pm - 8:24 pmSEA Seattle/Tacoma Intl-ONT Ontario

8h 15m2 stops Pasco Tri Cities Portland

$419Alaska Airlines

Wed, Aug 19 - Wed, Aug 19

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Frontier flights from Ontario to North America

Our best Frontier deals on Ontario to North America flight tickets

Frontier

Sep 28

ONT12:07 pmOntario

1h 36m

SFO1:43 pmSan Francisco

Oct 5

SFO6:02 pmSan Francisco

1h 34m

ONT7:36 pmOntario

$64

Frontier

Sep 11

ONT12:07 pmOntario

1h 36m

SFO1:43 pmSan Francisco

Sep 11

SFO6:02 pmSan Francisco

1h 34m

ONT7:36 pmOntario

$66

Frontier

Sep 14

ONT12:07 pmOntario

1h 36m

SFO1:43 pmSan Francisco

Sep 21

SFO6:02 pmSan Francisco

1h 34m

ONT7:36 pmOntario

$67

United Airlines flights from Ontario to North America

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

United Airlines

Sep 22

ONT9:01 amOntario

1h 29m

SFO10:30 amSan Francisco

Sep 23

SFO10:37 amSan Francisco

1h 35m

ONT12:12 pmOntario

$117

United Airlines

Aug 26

ONT5:00 amOntario

8h 00m

1 stop

ORD3:00 pmChicago O'Hare Intl

Aug 29

ORD8:06 pmChicago O'Hare Intl

4h 29m

ONT10:35 pmOntario

$267

United Airlines

Sep 21

ONT1:56 pmOntario

9h 03m

1 stop

ORD12:59 amChicago O'Hare Intl

Sep 25

ORD8:20 pmChicago O'Hare Intl

4h 29m

ONT10:49 pmOntario

$270

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Fri 10/2

12:07 pm-1:43 pm

Nonstop1h 36m

San Francisco

Thu 10/8

6:02 pm-7:40 pm

Nonstop1h 38m

$64

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Fri 10/2

12:07 pm-1:43 pm

Nonstop1h 36m

San Francisco

Mon 10/5

6:02 pm-7:36 pm

Nonstop1h 34m

$64

Quickest round-trip

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Sat 9/12

8:00 am-9:27 am

Nonstop1h 27m

San Francisco

Tue 9/15

6:30 pm-8:01 pm

Nonstop1h 31m

$117

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Thu 9/17

6:08 am-7:35 am

Nonstop1h 27m

San Francisco

Sat 9/19

6:30 pm-8:01 pm

Nonstop1h 31m

$117

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Tue 9/29

5:45 am-11:05 am

1 stop5h 20m

San Francisco

Wed 9/30

2:35 pm-9:00 pm

1 stop6h 25m

$151

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Wed 9/30

6:40 am-1:15 pm

1 stop6h 35m

San Francisco

Wed 9/30

4:40 pm-9:00 pm

1 stop4h 20m

$151

OntarioDenver

ONT Ontario - DEN Denver Intl

ONTDEN

Ontario

Wed 12/16

1:23 pm-7:22 pm

1 stop4h 59m

Denver Intl

Wed 1/6

6:56 pm-10:01 pm

1 stop4h 05m

$177

OntarioDenver

ONT Ontario - DEN Denver Intl

ONTDEN

Ontario

Thu 1/7

12:57 pm-6:06 pm

1 stop4h 09m

Denver Intl

Mon 1/11

11:43 am-4:07 pm

1 stop5h 24m

$177

OntarioSeattle

ONT Ontario - SEA Seattle/Tacoma Intl

ONTSEA

Ontario

Mon 10/5

5:44 pm-8:40 pm

Nonstop2h 56m

Seattle/Tacoma Intl

Wed 10/7

10:58 am-5:05 pm

1 stop6h 07m

$183

OntarioSeattle

ONT Ontario - SEA Seattle/Tacoma Intl

ONTSEA

Ontario

Tue 10/13

5:05 pm-8:01 pm

Nonstop2h 56m

Seattle/Tacoma Intl

Wed 10/14

10:58 am-5:05 pm

1 stop6h 07m

$188

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 September is, on average, the cheapest month to fly to North America from Ontario, with most prices found around $315. If you are unable to visit North America during the month of September, then departing from Ontario during the month October is also very affordable. Most momondo users find prices during this month for around $316.

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 Monday. Travelers who choose to depart for North America on a Monday will often find tickets for as low as $399. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to North America on Saturday is $482.

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 $319 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	$63
Fastest flight time	1h 00m
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 $63. The best round-trip flight deal from Ontario to North America found on momondo in the last 72 hours is $154.

The fastest flight from Ontario to North America takes 1h 00m

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 Las Vegas Harry Reid Intl (LAS).

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 8 as of August 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 (15.67% of total bookings). The next most popular plane models are Airbus A321-100/200 (13.09%), Airbus A320neo (13.05%), and Boeing 737 MAX 8 (11.71%).

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 $51	Free Cancellation	Rating 5.6 2,683 reviews	Search Frontier flights
Alaska Airlines	PriceFrom $91	Free Cancellation	Rating 7.9 12,808 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $96	Free Cancellation	Rating 7.4 10,105 reviews	Search United Airlines flights
JetBlue	PriceFrom $120	Free Cancellation	Rating 7.1 3,033 reviews	Search JetBlue flights
Delta	PriceFrom $128	Free Cancellation	Rating 7.8 8,502 reviews	Search Delta flights
Southwest	PriceFrom $133	Free Cancellation	Rating 8.0 4,217 reviews	Search Southwest flights
American Airlines	PriceFrom $200	Free Cancellation	Rating 7.1 11,946 reviews	Search American Airlines 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.

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Popular cities

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Complete your trip

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Popular cities in North America

Flights to New Yorkfrom $73

Flights to Los Angelesfrom $50

Flights to Orlandofrom $40

Flights to Miamifrom $70

Flights to San Franciscofrom $56

Flights to Chicagofrom $56

Flights to Las Vegasfrom $50

Flights to Washington, D.C.from $52

Flights to Bostonfrom $88

Flights to Atlantafrom $42

Flights to Fort Lauderdalefrom $42

Flights to Dallasfrom $50

Cheap flights from Ontario to North America from $23

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 10/1. 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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Cheap round-trip flights

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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