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Cheap flights from the United States to Ontario from C$ 154

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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
27 Aug — 3 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap 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 28 July 2026.

Mon 7/96:59 a.m.
DCA
-
YYZ
Nonstop1h 36m
Air Canada
Mon 14/96:25 p.m.
YYZ
-
DCA
Nonstop1h 34m
Air Canada
Deal found 24/7C$ 314
Wed 28/109:40 a.m.
LGA
-
YYZ
Nonstop1h 42m
Porter Airlines
Tue 3/117:00 a.m.
YYZ
-
LGA
Nonstop1h 40m
Porter Airlines
Deal found 26/7C$ 317
Wed 19/812:40 p.m.
DCA
-
YYZ
1 stop4h 28m
Air Canada
Wed 19/88:55 p.m.
YYZ
-
DCA
Nonstop1h 36m
Air Canada
Deal found 26/7C$ 319
Thu 27/88:40 p.m.
DCA
-
YYZ
Nonstop1h 31m
Air Canada
Mon 31/88:00 a.m.
YYZ
-
DCA
1 stop4h 00m
Air Canada
Deal found 27/7C$ 320
Thu 20/812:40 p.m.
DCA
-
YYZ
1 stop6h 32m
Air Canada
Fri 21/88:00 a.m.
YYZ
-
DCA
1 stop4h 00m
Air Canada
Deal found 27/7C$ 323
Tue 25/89:55 a.m.
IAD
-
YYZ
Nonstop1h 26m
Air Canada
Tue 25/82:00 p.m.
YYZ
-
IAD
1 stop5h 01m
Air Canada
Deal found 23/7C$ 323
Wed 9/912:55 p.m.
DCA
-
YYZ
1 stop4h 12m
Air Canada
Wed 16/95:30 p.m.
YYZ
-
DCA
1 stop4h 20m
Air Canada
Deal found 26/7C$ 324
Wed 9/94:00 p.m.
IAD
-
YYZ
Nonstop1h 25m
Air Canada
Wed 16/910:30 a.m.
YYZ
-
IAD
1 stop4h 30m
Air Canada
Deal found 26/7C$ 324
Thu 24/95:55 p.m.
LGA
-
YYZ
Nonstop1h 40m
Porter Airlines
Sat 26/97:20 a.m.
YYZ
-
LGA
Nonstop1h 35m
Porter Airlines
Deal found 27/7C$ 326
Tue 29/98:30 p.m.
LGA
-
YYZ
Nonstop1h 40m
Porter Airlines
Thu 1/107:20 a.m.
YYZ
-
LGA
Nonstop1h 35m
Porter Airlines
Deal found 25/7C$ 329
Wed 26/86:25 a.m.
EWR
-
YUL
1 stop5h 45m
Porter Airlines
Wed 26/83:15 p.m.
YUL
-
EWR
Nonstop1h 40m
Porter Airlines
Deal found 27/7C$ 329
Tue 1/96:00 a.m.
DCA
-
YYZ
1 stop4h 35m
Air Canada
Tue 1/95:30 p.m.
YYZ
-
DCA
1 stop4h 18m
Air Canada
Deal found 24/7C$ 329

Find flight deals from USA to Ontario

Keep the following information in mind while searching for USA to Ontario flight deals. Data was last updated 28 July 2026.

Round-trip from

C$ 314

One-way from

C$ 154

Popular in

February

Cheapest in

October

Average price

C$ 489

Good round-trip deal

C$ 117 or less

Good one-way deal

C$ 136 or less
Air Canada
  • Air Canada
  • 7/9-14/9
  • Nonstop
  • 3h 10m total
  • USA to Ontario
Search Deals
Air Canada
  • Air Canada
  • 10/8
  • 2 total stops
  • 7h 08m total
  • USA to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
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 28 July 2026.
Use the filters below to find and compare flights from the United States to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Toronto

DCA - YYZ

DCAYYZ

Washington, D.C. Reagan-National

Tue 18/8

6:20 a.m.-1:41 p.m.

1 stop7h 21m

Toronto Pearson Intl

Sat 22/8

9:45 a.m.-5:27 p.m.

1 stop7h 42m

C$ 381

Washington, D.C.Toronto

DCA - YYZ

DCAYYZ

Washington, D.C. Reagan-National

Thu 20/8

9:39 a.m.-1:34 p.m.

1 stop3h 55m

Toronto Pearson Intl

Thu 27/8

6:10 a.m.-11:28 a.m.

1 stop5h 18m

C$ 381

Washington, D.C.Toronto

DCA - YYZ

DCAYYZ

Washington, D.C. Reagan-National

Sat 19/9

6:10 a.m.-11:18 a.m.

1 stop5h 08m

Toronto Pearson Intl

Mon 21/9

6:25 p.m.-10:59 p.m.

1 stop4h 34m

C$ 381

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Mon 10/8

6:10 a.m.-1:34 p.m.

1 stop7h 24m

Toronto Pearson Intl

Wed 12/8

6:00 a.m.-11:49 a.m.

1 stop5h 49m

C$ 381

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Sun 18/10

6:05 a.m.-11:19 a.m.

1 stop5h 14m

Toronto Pearson Intl

Tue 20/10

2:26 p.m.-11:16 p.m.

1 stop8h 50m

C$ 381

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Fri 28/8

6:10 a.m.-1:34 p.m.

1 stop7h 24m

Toronto Pearson Intl

Tue 8/9

6:00 a.m.-10:21 a.m.

1 stop4h 21m

C$ 381

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Thu 17/9

6:10 a.m.-1:34 p.m.

1 stop7h 24m

Toronto Pearson Intl

Fri 18/9

2:24 p.m.-11:14 p.m.

1 stop8h 50m

C$ 381

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Sun 11/10

6:05 a.m.-1:36 p.m.

1 stop7h 31m

Toronto Pearson Intl

Thu 15/10

6:00 a.m.-10:12 a.m.

1 stop4h 12m

C$ 381

New YorkToronto

LGA - YYZ

LGAYYZ

New York LaGuardia

Fri 11/12

7:20 a.m.-9:12 a.m.

Nonstop1h 52m

Toronto Pearson Intl

Sun 13/12

6:45 p.m.-8:31 p.m.

Nonstop1h 46m

C$ 399

NewarkMontreal

EWR - YUL

EWRYUL

Newark

Wed 26/8

2:34 p.m.-4:10 p.m.

Nonstop1h 36m

Montreal Pierre Elliott Trudeau Intl

Sat 29/8

6:00 a.m.-7:38 a.m.

Nonstop1h 38m

C$ 403

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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, January is the cheapest month in which you can book a flight from USA to Region of Ontario (average of C$ 470). Flying from USA to Region of Ontario in July is currently the most expensive (average of C$ 570). 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 28 July 2026.

It’s typically best to fly out from USA to Region of Ontario in the afternoon. Doing so could potentially save you 22% on the flight price compared to flying at noon, which is usually more expensive.

Weekly flight availability from USA to Region of Ontario

Explore weekly flight availability from USA to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 28 July 2026.

The most flights from US0 to CAON are scheduled on a Monday (20 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 on average).

How far ahead should I book a flight from USA to Region of Ontario?

Booking 30 days in advance of your planned departure date is, on average, the best time to get cheap flights from USA to Region of Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 25 July 2026.

Travelers seeking maximum savings on their USA to Region of Ontario flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday 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 28 July 2026.
See what other customers who have flown with Porter Airlines,Delta, andUnited Airlines 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
449 reviews
Check prices

Food

7.5

Overall

8.0

Entertainment

6.9

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Porter Airlines
8.0
Very good
449 reviews
Porter Airlines
8.0
Very good
449 reviews
Check prices

Food

7.5

Overall

8.0

Entertainment

6.9

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Delta
7.8
Good
8,483 reviews
Porter Airlines
8.0
Very good
449 reviews
Check prices

Food

7.5

Overall

8.0

Entertainment

6.9

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
United Airlines
7.4
Good
10,048 reviews
Porter Airlines
8.0
Very good
449 reviews
Check prices

Food

7.5

Overall

8.0

Entertainment

6.9

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
WestJet
7.2
Good
3,415 reviews
Porter Airlines
8.0
Very good
449 reviews
Check prices

Food

7.5

Overall

8.0

Entertainment

6.9

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Air Canada
7.1
Good
11,401 reviews
Porter Airlines
8.0
Very good
449 reviews
Check prices

Food

7.5

Overall

8.0

Entertainment

6.9

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

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$ 403, Delta can have you in Region of Ontario from USA in 1h 36m. The distance between USA and Region of Ontario is about 531 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$ 37 on Flair Airlines. Other airlines that offer cheap prices include WestJet from C$ 75 and Porter Airlines from C$ 77 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, January is the cheapest month in which you can book a flight from USA to Region of Ontario (average of C$ 470). Flying from USA to Region of Ontario in July is currently the most expensive (average of C$ 570). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 28 July 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 144AverageC$ 657FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air TransatCheapestC$ 149AverageC$ 660FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Porter AirlinesCheapestC$ 162AverageC$ 500FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 166AverageC$ 608FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Flair AirlinesCheapestC$ 169AverageC$ 361FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
DeltaCheapestC$ 179AverageC$ 384FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapestC$ 181AverageC$ 563FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 230AverageC$ 919FlexibilityNo cancel feeOn-time69%
Search United Airlines 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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