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Cheap flights from Ontario to North America from $31

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 3/4. 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
8:48 pm - 9:56 pm
ONT
-
LAS
1h 08mnonstop
Frontier Logo
8:15 am - 9:23 am
LAS
-
ONT
1h 08mnonstop
$59Frontier
Thu, Jan 29 - Fri, Jan 30
Frontier Logo
3:07 pm - 4:19 pm
ONT
-
LAS
1h 12mnonstop
Frontier Logo
6:45 pm - 7:53 pm
LAS
-
ONT
1h 08mnonstop
$60Frontier
Tue, Jan 27 - Thu, Jan 29
Delta Logo
5:10 pm - 12:09 am
ONT
-
SEA
6h 59m1 stop
Delta Logo
4:55 pm - 11:58 pm
SEA
-
ONT
7h 03m1 stop
$119Delta
Thu, Jan 29 - Tue, Feb 3
Delta Logo
1:11 pm - 6:29 pm
ONT
-
SEA
5h 18m1 stop
Delta Logo
7:00 pm - 11:58 pm
SEA
-
ONT
4h 58m1 stop
$120Delta
Thu, Jan 29 - Mon, Feb 2
Southwest Logo
10:00 am - 3:40 pm
ONT
-
SEA
5h 40m1 stop
Southwest Logo
11:20 am - 4:25 pm
SEA
-
ONT
5h 05m1 stop
$121Southwest
Wed, Feb 4 - Tue, Feb 10
Alaska Airlines Logo
4:03 pm - 6:54 pm
ONT
-
SEA
2h 51mnonstop
Alaska Airlines Logo
8:15 am - 10:59 am
SEA
-
ONT
2h 44mnonstop
$123Alaska Airlines
Thu, Jan 29 - Sun, Feb 1
Alaska Airlines Logo
4:02 pm - 6:52 pm
ONT
-
SEA
2h 50mnonstop
Alaska Airlines Logo
8:56 pm - 11:32 pm
SEA
-
ONT
2h 36mnonstop
$128Alaska Airlines
Sat, Mar 7 - Sat, Mar 14
Southwest Logo
5:35 pm - 9:50 pm
ONT
-
SEA
4h 15m1 stop
Southwest Logo
2:15 pm - 10:20 pm
SEA
-
ONT
8h 05m1 stop
$131Southwest
Tue, Feb 3 - Thu, Feb 5
American Airlines Logo
6:00 am - 5:17 pm
ONT
-
JFK
8h 17m1 stop
American Airlines Logo
6:30 am - 12:03 pm
JFK
-
ONT
8h 33m1 stop
$177American Airlines
Tue, Feb 3 - Wed, Feb 4
American Airlines Logo
7:30 pm - 6:30 am
ONT
-
JFK
8h 00m1 stop
American Airlines Logo
8:25 am - 4:05 pm
JFK
-
ONT
10h 40m1 stop
$180American Airlines
Thu, Feb 5 - Mon, Feb 9

American Airlines flights from Ontario to North America

Our best American Airlines deals on Ontario to North America flight tickets
American Airlines
Feb 3
ONT4:45 pmOntario
1h 21m
PHX7:06 pmPhoenix Sky Harbor Intl
Feb 10
PHX8:48 amPhoenix Sky Harbor Intl
1h 20m
ONT9:08 amOntario
$171
American Airlines
Feb 3
ONT6:00 amOntario
8h 17m
1 stop
JFK5:17 pmNew York John F Kennedy Intl
Feb 4
JFK6:30 amNew York John F Kennedy Intl
8h 33m
1 stop
ONT12:03 pmOntario
$177
American Airlines
Feb 5
ONT7:30 pmOntario
8h 00m
1 stop
JFK6:30 amNew York John F Kennedy Intl
Feb 9
JFK8:25 amNew York John F Kennedy Intl
10h 40m
1 stop
ONT4:05 pmOntario
$180

Alaska Airlines flights from Ontario to North America

Our best Alaska Airlines deals on Ontario to North America flight tickets
Alaska Airlines
Jan 29
ONT4:03 pmOntario
2h 51m
SEA6:54 pmSeattle/Tacoma Intl
Feb 1
SEA8:15 amSeattle/Tacoma Intl
2h 44m
ONT10:59 amOntario
$123
Alaska Airlines
Mar 7
ONT4:02 pmOntario
2h 50m
SEA6:52 pmSeattle/Tacoma Intl
Mar 10
SEA8:05 pmSeattle/Tacoma Intl
2h 39m
ONT10:44 pmOntario
$128
Alaska Airlines
Feb 19
ONT6:14 amOntario
2h 55m
SEA9:09 amSeattle/Tacoma Intl
Feb 24
SEA12:30 pmSeattle/Tacoma Intl
2h 38m
ONT3:08 pmOntario
$129

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 January 8, 2026.
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 1/29

8:48 pm-9:56 pm

Nonstop1h 08m

Las Vegas Harry Reid Intl

Fri 1/30

8:15 am-9:23 am

Nonstop1h 08m

$59

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 1/27

3:07 pm-4:19 pm

Nonstop1h 12m

Las Vegas Harry Reid Intl

Thu 1/29

6:45 pm-7:53 pm

Nonstop1h 08m

$60

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Thu 1/29

5:10 pm-12:09 am

1 stop6h 59m

Seattle/Tacoma Intl

Tue 2/3

4:55 pm-11:58 pm

1 stop7h 03m

$119

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Thu 1/29

1:11 pm-6:29 pm

1 stop5h 18m

Seattle/Tacoma Intl

Mon 2/2

7:00 pm-11:58 pm

1 stop4h 58m

$120

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Wed 2/4

10:00 am-3:40 pm

1 stop5h 40m

Seattle/Tacoma Intl

Tue 2/10

11:20 am-4:25 pm

1 stop5h 05m

$121

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Thu 1/29

4:03 pm-6:54 pm

Nonstop2h 51m

Seattle/Tacoma Intl

Sun 2/1

8:15 am-10:59 am

Nonstop2h 44m

$123

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 3/7

4:02 pm-6:52 pm

Nonstop2h 50m

Seattle/Tacoma Intl

Sat 3/14

8:56 pm-11:32 pm

Nonstop2h 36m

$128

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Tue 2/3

5:35 pm-9:50 pm

1 stop4h 15m

Seattle/Tacoma Intl

Thu 2/5

2:15 pm-10:20 pm

1 stop8h 05m

$131

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Tue 2/3

6:00 am-5:17 pm

1 stop8h 17m

New York John F Kennedy Intl

Wed 2/4

6:30 am-12:03 pm

1 stop8h 33m

$177

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Thu 2/5

7:30 pm-6:30 am

1 stop8h 00m

New York John F Kennedy Intl

Mon 2/9

8:25 am-4:05 pm

1 stop10h 40m

$180

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 $250. 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 $286.

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 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 $341 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 $274 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

$44

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 $44. The best round-trip flight deal from Ontario to North America found on momondo in the last 72 hours is $99.
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 $27Free CancellationRating
6.3
8,289 reviews
Search Spirit Airlines flights
FrontierPriceFrom $36Free CancellationRating
5.7
3,061 reviews
Search Frontier flights
United AirlinesPriceFrom $59Free CancellationRating
7.4
9,143 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $67Free CancellationRating
8.0
11,671 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $97Free CancellationRating
8.0
4,250 reviews
Search Southwest flights
DeltaPriceFrom $178Free CancellationRating
7.9
8,032 reviews
Search Delta flights
American AirlinesPriceFrom $190Free CancellationRating
7.2
11,097 reviews
Search American Airlines flights
JetBluePriceFrom $223Free CancellationRating
7.2
2,892 reviews
Search JetBlue 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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