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Cheap flights from the United States to Ontario from C$ 120

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
28 Nov — 5 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from USA to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from USA to Ontario
Explore the most affordable flight options available from USA to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 October 2025.

Sat 6/126:04 a.m.ORD - YYZ
1 stop4h 52mAmerican Airlines
Sun 7/126:24 p.m.YYZ - ORD
Nonstop2h 00mAmerican Airlines
Deal found 27/10C$ 271
Thu 4/126:05 a.m.LGA - YYZ
Nonstop1h 43mAir Canada
Sun 7/122:00 p.m.YYZ - LGA
Nonstop1h 38mAir Canada
Deal found 27/10C$ 272
Fri 5/128:10 a.m.ORD - YYZ
Nonstop1h 46mAmerican Airlines
Mon 8/124:13 p.m.YYZ - ORD
1 stop7h 41mAmerican Airlines
Deal found 27/10C$ 279
Fri 12/1210:30 a.m.EWR - YYZ
1 stop6h 10mAir Canada
Fri 19/124:30 p.m.YYZ - EWR
Nonstop1h 33mAir Canada
Deal found 28/10C$ 284
Fri 5/128:15 p.m.ORD - YYZ
Nonstop1h 39mAir Canada
Sun 7/127:00 a.m.YYZ - ORD
1 stop5h 18mAir Canada
Deal found 29/10C$ 284
Thu 4/128:00 a.m.ORD - YYZ
Nonstop1h 40mAir Canada
Sun 7/127:00 a.m.YYZ - ORD
1 stop5h 18mAir Canada
Deal found 29/10C$ 285
Thu 11/126:55 p.m.EWR - YYZ
Nonstop1h 47mAir Canada
Thu 18/122:05 p.m.YYZ - EWR
Nonstop1h 38mAir Canada
Deal found 27/10C$ 286
Sun 7/128:50 a.m.LGA - YYZ
Nonstop1h 43mAir Canada
Tue 9/128:55 p.m.YYZ - LGA
Nonstop1h 38mAir Canada
Deal found 28/10C$ 289
Sun 7/126:55 a.m.EWR - YYZ
1 stop4h 45mAir Canada
Tue 9/129:10 p.m.YYZ - EWR
Nonstop1h 38mAir Canada
Deal found 28/10C$ 291
Wed 26/118:00 a.m.ORD - YYZ
Nonstop1h 40mAir Canada
Fri 28/112:15 p.m.YYZ - ORD
Nonstop1h 55mAir Canada
Deal found 29/10C$ 291
Fri 28/117:50 p.m.LGA - YYZ
Nonstop1h 43mAir Canada
Fri 5/128:55 p.m.YYZ - LGA
Nonstop1h 38mAir Canada
Deal found 29/10C$ 292
Tue 2/126:06 a.m.ORD - YYZ
1 stop4h 48mAmerican Airlines
Thu 4/1211:51 a.m.YYZ - ORD
1 stop5h 19mAmerican Airlines
Deal found 27/10C$ 292

Cheap flight deals from USA to Ontario

Keep the following information in mind while searching for USA to Ontario flight deals. Data was last updated 29 October 2025.

Round-trip from

C$ 267

One-way from

C$ 120

Popular in

July

Cheapest in

January

Average price

C$ 326

Good round-trip deal

C$ 109 or less

Good one-way deal

C$ 96 or less
Air Canada
  • Air Canada
  • 26/3-30/3
  • 2 total stops
  • 11h 43m total
  • USA to Ontario
Search Deals
American Airlines
  • American Airlines
  • 8/12
  • 1 total stop
  • 4h 52m total
  • USA to Ontario
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (C$ 82 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from USA to Ontario.
Search Deals
Price to beat on a one-way flight from USA to Ontario.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from USA to Ontario 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, Cheapflights users made 629,999 searches. Data last updated 29 October 2025.
Use the filters below to find and compare flights from the United States to Ontario that are best for you.

Fly from

USA

Fly to

Ontario

Route

Depart

Return

Price

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Tue 16/12

6:00 a.m.-11:48 a.m.

1 stop4h 48m

Toronto Pearson Intl

Fri 16/1

5:30 p.m.-6:50 p.m.

Nonstop2h 20m

C$ 307

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Fri 27/2

12:45 p.m.-7:17 p.m.

1 stop5h 32m

Toronto Pearson Intl

Sun 1/3

8:55 a.m.-10:02 a.m.

Nonstop2h 07m

C$ 307

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Tue 16/12

8:45 a.m.-2:14 p.m.

1 stop4h 29m

Toronto Pearson Intl

Sat 17/1

8:55 a.m.-10:01 a.m.

Nonstop2h 06m

C$ 307

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Wed 17/12

8:45 a.m.-2:14 p.m.

1 stop4h 29m

Toronto Pearson Intl

Tue 13/1

5:30 p.m.-6:50 p.m.

Nonstop2h 20m

C$ 307

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Wed 17/12

4:25 p.m.-11:20 p.m.

1 stop5h 55m

Toronto Pearson Intl

Sat 17/1

3:30 p.m.-4:40 p.m.

Nonstop2h 10m

C$ 307

NewarkToronto

EWR - YTZ

EWRYTZ

Newark

Sun 30/11

10:55 a.m.-3:58 p.m.

1 stop5h 03m

Toronto Island

Tue 2/12

7:40 p.m.-9:10 p.m.

Nonstop1h 30m

C$ 326

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Mon 2/3

1:35 p.m.-11:02 p.m.

1 stop8h 27m

Toronto Pearson Intl

Sat 7/3

1:00 p.m.-8:38 p.m.

1 stop8h 38m

C$ 326

NewarkToronto

EWR - YTZ

EWRYTZ

Newark

Wed 26/11

10:55 a.m.-5:43 p.m.

1 stop6h 48m

Toronto Island

Wed 3/12

8:40 a.m.-10:10 a.m.

Nonstop1h 30m

C$ 326

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Sat 13/12

6:45 a.m.-11:25 a.m.

1 stop3h 40m

Toronto Pearson Intl

Sun 14/12

3:38 p.m.-6:27 p.m.

1 stop3h 49m

C$ 326

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Fri 21/11

6:00 a.m.-4:02 p.m.

1 stop9h 02m

Toronto Pearson Intl

Mon 24/11

6:05 a.m.-1:55 p.m.

1 stop8h 50m

C$ 326

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/10

Showing 1-10 of 60 results
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Best time to book a flight from USA to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from USA with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from the United States to Ontario

What is the cheapest month to book a flight from USA to Region of Ontario?

Currently, March is the cheapest month in which you can book a flight from USA to Region of Ontario (average of C$ 74). Flying from USA to Region of Ontario in August is currently the most expensive (average of C$ 159). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from US to ON?

Find hourly flight availability from USA to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 October 2025.

It’s typically best to fly out from USA to Region of Ontario in the evening. Doing so could potentially save you 25% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from USA to Region of Ontario?

Use this chart to determine the cheapest time to fly round-trip from USA to Ontario. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their USA to Region of Ontario flight should consider departing on Monday evenings when fares are most often at their lowest. Wednesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 29 October 2025.
See what other customers who have flown with Porter Airlines,United Airlines, andWestJet from the United States to Ontario have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
384 reviews
Check prices

Crew

8.6

Food

7.6

Boarding

8.2

Entertainment

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Porter Airlines
8.0
Very good
384 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Crew

8.6

Food

7.6

Boarding

8.2

Entertainment

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
United Airlines
7.4
Good
9,001 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Crew

8.6

Food

7.6

Boarding

8.2

Entertainment

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
WestJet
7.2
Good
3,148 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Crew

8.6

Food

7.6

Boarding

8.2

Entertainment

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Canada
7.1
Good
10,371 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Crew

8.6

Food

7.6

Boarding

8.2

Entertainment

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Flair Airlines
6.0
Okay
251 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Crew

8.6

Food

7.6

Boarding

8.2

Entertainment

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

Related info for your journey

Find useful and relevant information for your journey from USA to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from USA to Region of Ontario?

    For as low as C$ 429, United Airlines can have you in Region of Ontario from USA in 1h 52m. The distance between USA and Region of Ontario is about 573 km. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from USA to Region of Ontario one-way?

    One-way options have recently been found by users for as low as C$ 124 on Delta. Other airlines that offer cheap prices include Porter Airlines from C$ 145 and Air Canada from C$ 151 one-way.

  • Can I find deals for flights from USA to Ontario that include hotel bookings?

    Yes. In addition to deals on USA to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from USA to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from USA to Ontario.

  • Can I find deals for business class flights from USA to Ontario?

    Yes. Cheapflights offers flight deals from USA to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from USA to Region of Ontario?

    Currently, March is the cheapest month in which you can book a flight from USA to Region of Ontario (average of C$ 74). Flying from USA to Region of Ontario in August is currently the most expensive (average of C$ 159). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for USA to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from USA to Ontario

Discover the top 8 airlines that operate flights from USA to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 29 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 130AverageC$ 281FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
Air CanadaCheapestC$ 140AverageC$ 545FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 148AverageC$ 452FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
DeltaCheapestC$ 149AverageC$ 336FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 164AverageC$ 575FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 179AverageC$ 369FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 189AverageC$ 476FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air TransatCheapestC$ 303AverageC$ 737FlexibilityNo cancel feeOn-time50%
Search Air Transat flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from USA to Ontario?

Deals for USA to Ontario flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from USA to Ontario?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario from USA.

Can Cheapflights find flights from USA to Ontario with no change fees?

Need flexible booking options for your flight to Ontario from USA? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from USA to Ontario become cheaper?

Yes, Cheapflights offers price alerts on USA to Ontario flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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