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Cheap flights from Ontario to North America from $36

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 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to North America

Cheap round-trip flights

Frontier Logo
8:59 pm - 12:26 amONT-DEN
2h 27mnonstop
Frontier Logo
6:00 am - 7:23 amDEN-ONT
2h 23mnonstop
$66Frontier
Find Deal
Thu, Oct 2 - Sun, Oct 5
Frontier Logo
8:59 pm - 12:26 amONT-DEN
2h 27mnonstop
Frontier Logo
6:00 am - 7:23 amDEN-ONT
2h 23mnonstop
$67Frontier
Find Deal
Fri, Oct 3 - Sun, Oct 5
Southwest Logo
9:35 pm - 10:40 pmONT-LAS
1h 05mnonstop
Southwest Logo
10:00 pm - 11:00 pmLAS-ONT
1h 00mnonstop
$71Southwest
Find Deal
Thu, Oct 9 - Thu, Oct 16
Southwest Logo
9:05 pm - 10:10 pmONT-LAS
1h 05mnonstop
Southwest Logo
7:20 am - 8:25 amLAS-ONT
1h 05mnonstop
$73Southwest
Find Deal
Sun, Oct 5 - Wed, Oct 8
United Airlines Logo
6:00 am - 7:24 amONT-SFO
1h 24mnonstop
United Airlines Logo
9:30 pm - 10:51 pmSFO-ONT
1h 21mnonstop
$77United Airlines
Find Deal
Sat, Nov 1 - Mon, Nov 3
United Airlines Logo
9:36 am - 10:55 amONT-SFO
1h 19mnonstop
United Airlines Logo
10:45 am - 12:13 pmSFO-ONT
1h 28mnonstop
$96United Airlines
Find Deal
Tue, Oct 7 - Tue, Oct 14
Delta Logo
4:35 pm - 10:27 pmONT-PDX
5h 52m1 stop
Delta Logo
5:40 am - 12:14 pmPDX-ONT
6h 34m1 stop
$153Delta
Find Deal
Tue, Oct 28 - Tue, Nov 4
Delta Logo
11:48 am - 7:19 pmONT-PDX
7h 31m1 stop
Delta Logo
5:25 pm - 10:41 pmPDX-ONT
5h 16m1 stop
$165Delta
Find Deal
Sat, Oct 11 - Wed, Oct 15
American Airlines Logo
11:55 pm - 11:23 amONT-EWR
8h 28m1 stop
American Airlines Logo
6:49 pm - 11:43 pmEWR-ONT
7h 54m1 stop
$229American Airlines
Find Deal
Sat, Feb 14 - Sat, Feb 21
American Airlines Logo
6:20 am - 4:55 pmONT-EWR
7h 35m1 stop
American Airlines Logo
6:39 am - 12:03 pmEWR-ONT
8h 24m1 stop
$247American Airlines
Find Deal
Tue, Nov 4 - Wed, Nov 5

Frontier flights from Ontario to North America

Our best Frontier deals on Ontario to North America flight tickets
Frontier
Oct 2
ONT8:59 pmOntario
2h 27m
DEN12:26 amDenver Intl
Oct 5
DEN6:00 amDenver Intl
2h 23m
ONT7:23 amOntario
$66
Find similar
Frontier
Oct 3
ONT8:59 pmOntario
2h 27m
DEN12:26 amDenver Intl
Oct 5
DEN6:00 amDenver Intl
2h 23m
ONT7:23 amOntario
$67
Find similar
Frontier
Nov 1
ONT6:53 amOntario
2h 25m
DEN10:18 amDenver Intl
Nov 1
DEN10:29 pmDenver Intl
2h 21m
ONT11:50 pmOntario
$68
Find similar

United Airlines flights from Ontario to North America

Our best United Airlines deals on Ontario to North America flight tickets
United Airlines
Nov 1
ONT6:00 amOntario
1h 24m
SFO7:24 amSan Francisco
Nov 3
SFO9:30 pmSan Francisco
1h 21m
ONT10:51 pmOntario
$77
Find similar
United Airlines
Oct 7
ONT9:36 amOntario
1h 19m
SFO10:55 amSan Francisco
Oct 14
SFO10:45 amSan Francisco
1h 28m
ONT12:13 pmOntario
$96
Find similar
United Airlines
Oct 6
ONT9:36 amOntario
1h 19m
SFO10:55 amSan Francisco
Nov 10
SFO9:30 pmSan Francisco
1h 21m
ONT10:51 pmOntario
$117
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to North America that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Ontario to North America that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Thu 10/2

8:59 pm-12:26 am

Nonstop2h 27m

Denver Intl

Sun 10/5

6:00 am-7:23 am

Nonstop2h 23m

$66

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Fri 10/3

8:59 pm-12:26 am

Nonstop2h 27m

Denver Intl

Sun 10/5

6:00 am-7:23 am

Nonstop2h 23m

$67

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Thu 10/9

9:35 pm-10:40 pm

Nonstop1h 05m

Las Vegas Harry Reid Intl

Thu 10/16

10:00 pm-11:00 pm

Nonstop1h 00m

$71

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Sun 10/5

9:05 pm-10:10 pm

Nonstop1h 05m

Las Vegas Harry Reid Intl

Wed 10/8

7:20 am-8:25 am

Nonstop1h 05m

$73

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Sat 11/1

6:00 am-7:24 am

Nonstop1h 24m

San Francisco

Mon 11/3

9:30 pm-10:51 pm

Nonstop1h 21m

$77

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Tue 10/7

9:36 am-10:55 am

Nonstop1h 19m

San Francisco

Tue 10/14

10:45 am-12:13 pm

Nonstop1h 28m

$96

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 10/28

4:35 pm-10:27 pm

1 stop5h 52m

Portland

Tue 11/4

5:40 am-12:14 pm

1 stop6h 34m

$153

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 10/11

11:48 am-7:19 pm

1 stop7h 31m

Portland

Wed 10/15

5:25 pm-10:41 pm

1 stop5h 16m

$165

OntarioNewark

ONT - EWR

ONTEWR

Ontario

Sat 2/14

11:55 pm-11:23 am

1 stop8h 28m

Newark

Sat 2/21

6:49 pm-11:43 pm

1 stop7h 54m

$229

OntarioNewark

ONT - EWR

ONTEWR

Ontario

Tue 11/4

6:20 am-4:55 pm

1 stop7h 35m

Newark

Wed 11/5

6:39 am-12:03 pm

1 stop8h 24m

$247

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 January is, on average, the cheapest month to fly to North America from Ontario, with most prices found around $277. If you are unable to visit North America during the month of January, then departing from Ontario during the month September is also very affordable. Most momondo users find prices during this month for around $297.

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 Friday. Travelers who choose to depart for North America on a Friday will often find tickets for as low as $339. Be sure to avoid booking your departure on a Wednesday as prices are generally higher than usual. According to our data, the average ticket price to North America on Wednesday is $386.

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

The cheapest time of day to fly to North America is in the afternoon when flights can be purchased for as low as $309. Try not to purchase tickets in the evening because they tend to be around $358. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Ontario to North America flight route?

Fly from Ontario to Las Vegas Harry Reid Intl for the best Ontario - North America flight prices

How far in advance should I book a flight 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 $347 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 $279 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

$39

Fastest flight time

1h 00m

Direct flights

Every day

Airports in North America

1 airport
The best one-way flight to North America from Ontario in the past 72 hours is $39. The best round-trip flight deal from Ontario to North America found on momondo in the last 72 hours is $93.
The fastest flight from Ontario to North America takes 1h 00m
Direct flights go from Ontario to North America every day.
There is 1 airport near North America: Las Vegas Harry Reid Intl (LAS)
Search flight deals

  • 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?

  • 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?

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
Spirit AirlinesPriceFrom $22Free CancellationRating
6.3
8,023 reviews
Search Spirit Airlines flights
FrontierPriceFrom $36Free CancellationRating
5.8
3,177 reviews
Search Frontier flights
United AirlinesPriceFrom $58Free CancellationRating
7.4
8,937 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $67Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
DeltaPriceFrom $97Free CancellationRating
7.9
7,960 reviews
Search Delta flights
SouthwestPriceFrom $97Free CancellationRating
8.0
4,248 reviews
Search Southwest flights
JetBluePriceFrom $207Free CancellationRating
7.2
2,913 reviews
Search JetBlue flights
VivaPriceFrom $228Free CancellationRating
7.0
788 reviews
Search Viva flights
American AirlinesPriceFrom $237Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
VolarisPriceFrom $280Free CancellationRating
6.6
1,155 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.

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Find better results for your trip to North America

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