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Cheap flights from Ontario to North America from $35

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 1/8. 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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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
4:04 pm - 5:11 pm
ONT
-
LAS
1h 07mnonstop
Frontier Logo
4:45 pm - 5:54 pm
LAS
-
ONT
1h 09mnonstop
$57Frontier
Tue, Jan 6 - Tue, Jan 13
Frontier Logo
7:52 am - 9:00 am
ONT
-
LAS
1h 08mnonstop
Frontier Logo
2:00 pm - 3:09 pm
LAS
-
ONT
1h 09mnonstop
$58Frontier
Tue, Jan 6 - Tue, Jan 6
Frontier Logo
7:52 am - 9:00 am
ONT
-
LAS
1h 08mnonstop
Frontier Logo
8:45 am - 9:50 am
LAS
-
ONT
1h 05mnonstop
$59Frontier
Tue, Jan 6 - Wed, Jan 7
Delta Logo
3:30 pm - 6:35 pm
ONT
-
SEA
3h 05mnonstop
Delta Logo
5:00 am - 12:16 pm
SEA
-
ONT
7h 16m1 stop
$129Delta
Wed, Jan 21 - Sat, Jan 24
Alaska Airlines Logo
11:53 am - 2:44 pm
ONT
-
SEA
2h 51mnonstop
Alaska Airlines Logo
8:15 am - 10:59 am
SEA
-
ONT
2h 44mnonstop
$138Alaska Airlines
Tue, Jan 20 - Sun, Jan 25
Delta Logo
5:07 pm - 11:22 pm
ONT
-
SEA
6h 15m1 stop
Delta Logo
5:25 am - 12:16 pm
SEA
-
ONT
6h 51m1 stop
$139Delta
Fri, Jan 9 - Sun, Jan 11
Southwest Logo
5:15 am - 10:15 am
ONT
-
HOU
3h 00mnonstop
Southwest Logo
3:35 pm - 5:10 pm
HOU
-
ONT
3h 35mnonstop
$333Southwest
Thu, Jan 29 - Thu, Jan 29
Southwest Logo
6:00 am - 12:45 pm
ONT
-
HOU
4h 45m1 stop
Southwest Logo
9:30 pm - 11:05 pm
HOU
-
ONT
3h 35mnonstop
$339Southwest
Wed, Mar 18 - Wed, Mar 18
American Airlines Logo
7:10 am - 3:50 pm
ONT
-
HOU
6h 40m1 stop
American Airlines Logo
12:17 pm - 4:24 pm
HOU
-
ONT
6h 07m1 stop
$353American Airlines
Sat, Feb 14 - Tue, Feb 17
American Airlines Logo
6:00 am - 6:06 pm
ONT
-
HOU
10h 06m1 stop
American Airlines Logo
6:36 pm - 10:48 pm
HOU
-
ONT
6h 12m1 stop
$359American Airlines
Sun, Jan 18 - Mon, Jan 26

Delta flights from Ontario to North America

Our best Delta deals on Ontario to North America flight tickets
Delta
Jan 21
ONT5:10 pmOntario
6h 59m
1 stop
SEA12:09 amSeattle/Tacoma Intl
Jan 25
SEA11:15 amSeattle/Tacoma Intl
2h 41m
ONT1:56 pmOntario
$129
Find similar
Delta
Feb 26
ONT6:00 amOntario
6h 33m
1 stop
SEA12:33 pmSeattle/Tacoma Intl
Feb 28
SEA5:30 amSeattle/Tacoma Intl
6h 37m
1 stop
ONT12:07 pmOntario
$139
Find similar
Delta
Jan 18
ONT7:30 amOntario
3h 06m
SEA10:36 amSeattle/Tacoma Intl
Jan 22
SEA8:07 pmSeattle/Tacoma Intl
2h 44m
ONT10:51 pmOntario
$159
Find similar

Frontier flights from Ontario to North America

Our best Frontier deals on Ontario to North America flight tickets
Frontier
Jan 6
ONT4:04 pmOntario
1h 07m
LAS5:11 pmLas Vegas Harry Reid Intl
Jan 13
LAS4:45 pmLas Vegas Harry Reid Intl
1h 09m
ONT5:54 pmOntario
$57
Find similar
Frontier
Jan 6
ONT7:52 amOntario
1h 08m
LAS9:00 amLas Vegas Harry Reid Intl
Jan 6
LAS2:00 pmLas Vegas Harry Reid Intl
1h 09m
ONT3:09 pmOntario
$58
Find similar
Frontier
Jan 6
ONT7:52 amOntario
1h 08m
LAS9:00 amLas Vegas Harry Reid Intl
Jan 7
LAS8:45 amLas Vegas Harry Reid Intl
1h 05m
ONT9:50 amOntario
$59
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 December 18, 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

Tue 1/6

4:04 pm-5:11 pm

Nonstop1h 07m

Las Vegas Harry Reid Intl

Tue 1/13

4:45 pm-5:54 pm

Nonstop1h 09m

$57

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 1/6

7:52 am-9:00 am

Nonstop1h 08m

Las Vegas Harry Reid Intl

Tue 1/6

2:00 pm-3:09 pm

Nonstop1h 09m

$58

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 1/6

7:52 am-9:00 am

Nonstop1h 08m

Las Vegas Harry Reid Intl

Wed 1/7

8:45 am-9:50 am

Nonstop1h 05m

$59

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Wed 1/21

3:30 pm-6:35 pm

Nonstop3h 05m

Seattle/Tacoma Intl

Sat 1/24

5:00 am-12:16 pm

1 stop7h 16m

$129

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Tue 1/20

11:53 am-2:44 pm

Nonstop2h 51m

Seattle/Tacoma Intl

Sun 1/25

8:15 am-10:59 am

Nonstop2h 44m

$138

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Fri 1/9

5:07 pm-11:22 pm

1 stop6h 15m

Seattle/Tacoma Intl

Sun 1/11

5:25 am-12:16 pm

1 stop6h 51m

$139

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Thu 1/29

5:15 am-10:15 am

Nonstop3h 00m

Houston Hobby

Thu 1/29

3:35 pm-5:10 pm

Nonstop3h 35m

$333

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Wed 3/18

6:00 am-12:45 pm

1 stop4h 45m

Houston Hobby

Wed 3/18

9:30 pm-11:05 pm

Nonstop3h 35m

$339

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Sat 2/14

7:10 am-3:50 pm

1 stop6h 40m

Houston Hobby

Tue 2/17

12:17 pm-4:24 pm

1 stop6h 07m

$353

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Sun 1/18

6:00 am-6:06 pm

1 stop10h 06m

Houston Hobby

Mon 1/26

6:36 pm-10:48 pm

1 stop6h 12m

$359

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 $258. 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 $292.

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 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 $346 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

$41

Direct flights

Every day

Airports in North America

5,162 airports
The best one-way flight to North America from Ontario in the past 72 hours is $41. The best round-trip flight deal from Ontario to North America found on momondo in the last 72 hours is $118.
Direct flights go from Ontario to North America every day.
There are 5,162 airports in North America. From Ontario there are direct flights to 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
8,190 reviews
Search Spirit Airlines flights
FrontierPriceFrom $34Free CancellationRating
5.8
3,081 reviews
Search Frontier flights
United AirlinesPriceFrom $58Free CancellationRating
7.4
9,091 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $67Free CancellationRating
8.0
11,477 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $97Free CancellationRating
7.9
4,250 reviews
Search Southwest flights
DeltaPriceFrom $153Free CancellationRating
7.9
8,005 reviews
Search Delta flights
American AirlinesPriceFrom $183Free CancellationRating
7.2
11,054 reviews
Search American Airlines flights
JetBluePriceFrom $223Free CancellationRating
7.2
2,897 reviews
Search JetBlue flights
VivaPriceFrom $228Free CancellationRating
7.0
797 reviews
Search Viva flights
VolarisPriceFrom $276Free CancellationRating
6.6
1,156 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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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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