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Cheap flights from Ontario to North America from $53

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 4/16. 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
6:05 am - 9:25 am
ONT
-
DEN
2h 20mnonstop
Frontier Logo
10:29 pm - 11:59 pm
DEN
-
ONT
2h 30mnonstop
$78Frontier
Thu, Mar 5 - Sun, Mar 8
Frontier Logo
6:05 am - 9:25 am
ONT
-
DEN
2h 20mnonstop
Frontier Logo
10:29 pm - 11:59 pm
DEN
-
ONT
2h 30mnonstop
$79Frontier
Thu, Mar 5 - Thu, Mar 12
Frontier Logo
6:05 am - 9:25 am
ONT
-
DEN
2h 20mnonstop
Frontier Logo
10:29 pm - 11:59 pm
DEN
-
ONT
2h 30mnonstop
$80Frontier
Thu, Mar 5 - Mon, Mar 9
Delta Logo
11:04 pm - 9:17 am
ONT
-
HOU
8h 13m
1 stop
Delta Logo
1:16 pm - 9:54 pm
HOU
-
ONT
10h 38m
1 stop
$237Delta
Sat, May 9 - Tue, May 12
United Airlines Logo
6:10 am - 4:55 pm
ONT
-
EWR
7h 45m
1 stop
United Airlines Logo
2:00 pm - 8:50 pm
EWR
-
ONT
9h 50m
1 stop
$257United Airlines
Tue, Mar 3 - Wed, Mar 11
American Airlines Logo
6:15 am - 9:00 pm
ONT
-
EWR
11h 45m
2 stops
American Airlines Logo
1:30 pm - 9:24 pm
EWR
-
ONT
10h 54m
1 stop
$262American Airlines
Tue, Mar 3 - Wed, Mar 11
Delta Logo
10:20 pm - 4:02 pm
ONT
-
EWR
14h 42m
2 stops
Delta Logo
2:30 pm - 11:51 pm
EWR
-
ONT
12h 21m
2 stops
$267Delta
Tue, Mar 3 - Wed, Mar 11
Southwest Logo
6:10 am - 5:40 pm
ONT
-
HNL
14h 30m
1 stop
Southwest Logo
8:15 am - 9:35 pm
HNL
-
ONT
10h 20m
1 stop
$306Southwest
Mon, Apr 27 - Thu, Apr 30
American Airlines Logo
7:00 am - 7:50 pm
ONT
-
HOU
10h 50m
1 stop
American Airlines Logo
8:20 pm - 11:59 pm
HOU
-
ONT
5h 39m
1 stop
$311American Airlines
Sat, Mar 7 - Mon, Mar 9
Southwest Logo
1:20 pm - 6:15 pm
ONT
-
HOU
2h 55mnonstop
Southwest Logo
9:00 am - 2:00 pm
HOU
-
ONT
7h 00m
1 stop
$327Southwest
Tue, Mar 24 - Tue, Mar 31

United Airlines flights from Ontario to North America

Our best United Airlines deals on Ontario to North America flight tickets
United Airlines
Mar 7
ONT1:40 pmOntario
1h 33m
SFO3:13 pmSan Francisco
Mar 7
SFO9:30 pmSan Francisco
1h 27m
ONT10:57 pmOntario
$171
United Airlines
Apr 24
ONT6:45 pmOntario
4h 45m
1 stop
SEA11:30 pmSeattle/Tacoma Intl
May 2
SEA5:05 amSeattle/Tacoma Intl
12h 47m
2 stops
ONT5:52 pmOntario
$199
United Airlines
Apr 16
ONT1:34 pmOntario
5h 46m
1 stop
ORD9:20 pmChicago O'Hare Intl
Apr 20
ORD8:00 pmChicago O'Hare Intl
4h 26m
ONT10:26 pmOntario
$247

Delta flights from Ontario to North America

Our best Delta deals on Ontario to North America flight tickets
Delta
Apr 17
ONT2:20 pmOntario
3h 04m
SEA5:24 pmSeattle/Tacoma Intl
Apr 19
SEA10:54 amSeattle/Tacoma Intl
2h 45m
ONT1:39 pmOntario
$177
Delta
Mar 9
ONT6:00 amOntario
2h 54m
SEA8:54 amSeattle/Tacoma Intl
Mar 10
SEA8:30 amSeattle/Tacoma Intl
2h 47m
ONT11:17 amOntario
$197
Delta
Mar 20
ONT6:00 amOntario
2h 55m
SEA8:55 amSeattle/Tacoma Intl
Mar 23
SEA7:50 pmSeattle/Tacoma Intl
2h 44m
ONT10:34 pmOntario
$208

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 February 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

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Thu 3/5

6:05 am-9:25 am

Nonstop2h 20m

Denver Intl

Sun 3/8

10:29 pm-11:59 pm

Nonstop2h 30m

$78

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Thu 3/5

6:05 am-9:25 am

Nonstop2h 20m

Denver Intl

Thu 3/12

10:29 pm-11:59 pm

Nonstop2h 30m

$79

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Thu 3/5

6:05 am-9:25 am

Nonstop2h 20m

Denver Intl

Mon 3/9

10:29 pm-11:59 pm

Nonstop2h 30m

$80

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Sat 5/9

11:04 pm-9:17 am

1 stop8h 13m

Houston Hobby

Tue 5/12

1:16 pm-9:54 pm

1 stop10h 38m

$237

OntarioNewark

ONT - EWR

ONTEWR

Ontario

Tue 3/3

6:10 am-4:55 pm

1 stop7h 45m

Newark

Wed 3/11

2:00 pm-8:50 pm

1 stop9h 50m

$257

OntarioNewark

ONT - EWR

ONTEWR

Ontario

Tue 3/3

6:15 am-9:00 pm

2 stops11h 45m

Newark

Wed 3/11

1:30 pm-9:24 pm

1 stop10h 54m

$262

OntarioNewark

ONT - EWR

ONTEWR

Ontario

Tue 3/3

10:20 pm-4:02 pm

2 stops14h 42m

Newark

Wed 3/11

2:30 pm-11:51 pm

2 stops12h 21m

$267

OntarioHonolulu

ONT - HNL

ONTHNL

Ontario

Mon 4/27

6:10 am-5:40 pm

1 stop14h 30m

Honolulu

Thu 4/30

8:15 am-9:35 pm

1 stop10h 20m

$306

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Sat 3/7

7:00 am-7:50 pm

1 stop10h 50m

Houston Hobby

Mon 3/9

8:20 pm-11:59 pm

1 stop5h 39m

$311

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Tue 3/24

1:20 pm-6:15 pm

Nonstop2h 55m

Houston Hobby

Tue 3/31

9:00 am-2:00 pm

1 stop7h 00m

$327

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 February is, on average, the cheapest month to fly to North America from Ontario, with most prices found around $267. If you are unable to visit North America during the month of February, then departing from Ontario during the month January is also very affordable. Most momondo users find prices during this month for around $272.

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 Sunday. Travelers who choose to depart for North America on a Sunday will often find tickets for as low as $336. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to North America on Thursday is $386.

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 $333 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 $267 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

Fastest flight time

1h 05m

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 $43. The best round-trip flight deal from Ontario to North America found on momondo in the last 72 hours is $95.
The fastest flight from Ontario to North America takes 1h 05m
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 San Francisco (SFO).
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
8,430 reviews
Search Spirit Airlines flights
FrontierPriceFrom $31Free CancellationRating
5.7
3,052 reviews
Search Frontier flights
United AirlinesPriceFrom $58Free CancellationRating
7.4
9,254 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $67Free CancellationRating
8.0
11,850 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $97Free CancellationRating
8.0
4,280 reviews
Search Southwest flights
JetBluePriceFrom $155Free CancellationRating
7.2
2,896 reviews
Search JetBlue flights
DeltaPriceFrom $178Free CancellationRating
7.9
8,172 reviews
Search Delta flights
American AirlinesPriceFrom $190Free CancellationRating
7.2
11,249 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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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
Flights to New Yorkfrom $49
Flights to Los Angelesfrom $49
Flights to Miamifrom $27
Flights to Chicagofrom $50
Flights to Orlandofrom $27
Flights to San Franciscofrom $68
Flights to Las Vegasfrom $48
Flights to Washington, D.C.from $56
Flights to Bostonfrom $50
Flights to Atlantafrom $49
Flights to Dallasfrom $50
Flights to Seattlefrom $65