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Cheap flights from Ontario to North America from $34

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 1/9. 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

Enter your travel dates to find the best prices.
Frontier Logo
3:22 pm - 4:34 pmONT-LAS
1h 12mnonstop
Frontier Logo
6:45 pm - 7:53 pmLAS-ONT
1h 08mnonstop
$53Frontier
Find Deal
Thu, Feb 5 - Thu, Feb 5
Frontier Logo
6:15 am - 7:22 amONT-LAS
1h 07mnonstop
Frontier Logo
8:13 pm - 9:17 pmLAS-ONT
1h 04mnonstop
$56Frontier
Find Deal
Tue, Dec 16 - Wed, Dec 17
Delta Logo
6:00 am - 12:57 pmONT-SEA
6h 57m1 stop
Delta Logo
8:15 am - 11:02 amSEA-ONT
2h 47mnonstop
$129Delta
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Tue, Dec 16 - Sun, Jan 4
Alaska Airlines Logo
6:00 am - 8:57 amONT-SEA
2h 57mnonstop
Alaska Airlines Logo
12:31 pm - 3:08 pmSEA-ONT
2h 37mnonstop
$137Alaska Airlines
Find Deal
Fri, Dec 19 - Mon, Jan 12
Alaska Airlines Logo
12:02 pm - 2:52 pmONT-SEA
2h 50mnonstop
Alaska Airlines Logo
8:56 pm - 11:32 pmSEA-ONT
2h 36mnonstop
$138Alaska Airlines
Find Deal
Sat, Feb 14 - Fri, Feb 20
Delta Logo
6:00 am - 12:33 pmONT-SEA
6h 33m1 stop
Delta Logo
5:30 am - 12:16 pmSEA-ONT
6h 46m1 stop
$139Delta
Find Deal
Sat, Jan 24 - Tue, Jan 27
American Airlines Logo
11:59 pm - 11:25 amONT-LGA
8h 26m1 stop
American Airlines Logo
10:35 am - 6:45 pmLGA-ONT
11h 10m1 stop
$193American Airlines
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Fri, Jan 30 - Tue, Feb 3
American Airlines Logo
11:59 pm - 11:55 amONT-LGA
8h 56m2 stops
American Airlines Logo
4:05 pm - 10:48 pmLGA-ONT
9h 43m1 stop
$198American Airlines
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Fri, Jan 30 - Tue, Feb 3
United Airlines Logo
6:39 pm - 5:59 amONT-EWR
8h 20m1 stop
United Airlines Logo
2:07 pm - 8:58 pmEWR-ONT
9h 51m1 stop
$292United Airlines
Find Deal
Fri, Jan 9 - Tue, Jan 13
United Airlines Logo
5:05 am - 5:30 pmONT-EWR
9h 25m1 stop
United Airlines Logo
4:40 pm - 10:53 pmEWR-ONT
9h 13m1 stop
$295United Airlines
Find Deal
Sun, Dec 7 - Sat, Jan 17

Southwest flights from Ontario to North America

Our best Southwest deals on Ontario to North America flight tickets
Southwest
Dec 25
ONT3:10 pmOntario
7h 20m
1 stop
SEA10:30 pmSeattle/Tacoma Intl
Jan 3
SEA7:05 amSeattle/Tacoma Intl
6h 55m
1 stop
ONT2:00 pmOntario
$151
Find similar
Southwest
Dec 13
ONT5:30 amOntario
6h 30m
1 stop
SFO12:00 pmSan Francisco
Dec 15
SFO5:20 amSan Francisco
4h 15m
1 stop
ONT9:35 amOntario
$154
Find similar
Southwest
Dec 9
ONT5:55 amOntario
5h 35m
1 stop
SFO11:30 amSan Francisco
Dec 10
SFO9:25 amSan Francisco
5h 55m
1 stop
ONT3:20 pmOntario
$157
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Frontier flights from Ontario to North America

Our best Frontier deals on Ontario to North America flight tickets
Frontier
Feb 5
ONT3:22 pmOntario
1h 12m
LAS4:34 pmLas Vegas Harry Reid Intl
Feb 5
LAS6:45 pmLas Vegas Harry Reid Intl
1h 08m
ONT7:53 pmOntario
$53
Find similar
Frontier
Dec 16
ONT6:15 amOntario
1h 07m
LAS7:22 amLas Vegas Harry Reid Intl
Dec 17
LAS8:13 pmLas Vegas Harry Reid Intl
1h 04m
ONT9:17 pmOntario
$56
Find similar
Frontier
Dec 16
ONT6:15 amOntario
1h 07m
LAS7:22 amLas Vegas Harry Reid Intl
Dec 16
LAS8:13 pmLas Vegas Harry Reid Intl
1h 04m
ONT9:17 pmOntario
$57
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 November 26, 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

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Thu 2/5

3:22 pm-4:34 pm

Nonstop1h 12m

Las Vegas Harry Reid Intl

Thu 2/5

6:45 pm-7:53 pm

Nonstop1h 08m

$53

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 12/16

6:15 am-7:22 am

Nonstop1h 07m

Las Vegas Harry Reid Intl

Wed 12/17

8:13 pm-9:17 pm

Nonstop1h 04m

$56

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Tue 12/16

6:00 am-12:57 pm

1 stop6h 57m

Seattle/Tacoma Intl

Sun 1/4

8:15 am-11:02 am

Nonstop2h 47m

$129

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Fri 12/19

6:00 am-8:57 am

Nonstop2h 57m

Seattle/Tacoma Intl

Mon 1/12

12:31 pm-3:08 pm

Nonstop2h 37m

$137

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 2/14

12:02 pm-2:52 pm

Nonstop2h 50m

Seattle/Tacoma Intl

Fri 2/20

8:56 pm-11:32 pm

Nonstop2h 36m

$138

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 1/24

6:00 am-12:33 pm

1 stop6h 33m

Seattle/Tacoma Intl

Tue 1/27

5:30 am-12:16 pm

1 stop6h 46m

$139

OntarioNew York

ONT - LGA

ONTLGA

Ontario

Fri 1/30

11:59 pm-11:25 am

1 stop8h 26m

New York LaGuardia

Tue 2/3

10:35 am-6:45 pm

1 stop11h 10m

$193

OntarioNew York

ONT - LGA

ONTLGA

Ontario

Fri 1/30

11:59 pm-11:55 am

2 stops8h 56m

New York LaGuardia

Tue 2/3

4:05 pm-10:48 pm

1 stop9h 43m

$198

OntarioNewark

ONT - EWR

ONTEWR

Ontario

Fri 1/9

6:39 pm-5:59 am

1 stop8h 20m

Newark

Tue 1/13

2:07 pm-8:58 pm

1 stop9h 51m

$292

OntarioNewark

ONT - EWR

ONTEWR

Ontario

Sun 12/7

5:05 am-5:30 pm

1 stop9h 25m

Newark

Sat 1/17

4:40 pm-10:53 pm

1 stop9h 13m

$295

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 $256. If you are unable to visit North America during the month of January, then departing from Ontario during the month February is also very affordable. Most momondo users find prices during this month for around $312.

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 Saturday. Travelers who choose to depart for North America on a Saturday will often find tickets for as low as $335. 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 $387.

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 $359. 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 San Francisco 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 $349 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 $272 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

$43

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 $43. The best round-trip flight deal from Ontario to North America found on momondo in the last 72 hours is $135.
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 $24Free CancellationRating
6.3
8,156 reviews
Search Spirit Airlines flights
FrontierPriceFrom $36Free CancellationRating
5.8
3,101 reviews
Search Frontier flights
United AirlinesPriceFrom $58Free CancellationRating
7.4
9,050 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $67Free CancellationRating
8.0
11,363 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $97Free CancellationRating
8.0
4,254 reviews
Search Southwest flights
DeltaPriceFrom $178Free CancellationRating
7.9
8,004 reviews
Search Delta flights
VivaPriceFrom $228Free CancellationRating
7.0
789 reviews
Search Viva flights
JetBluePriceFrom $237Free CancellationRating
7.2
2,904 reviews
Search JetBlue flights
American AirlinesPriceFrom $242Free CancellationRating
7.2
11,037 reviews
Search American Airlines flights
VolarisPriceFrom $273Free CancellationRating
6.7
1,154 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

Popular cities in North America

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