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

The cheapest airline one-way is Flair Airlines, with whom users have recently found tickets for as low as C$ 118. However, be on the lookout for offers from Porter Airlines and WestJet, as they are both options that can get you from Region of Ontario to USA for a low price.

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

To save on the cost of your flight from Region of Ontario to USA, book at least 43 days before your planned departure. Booking around this time can save you about 23% on the cost of this flight compared to booking a flight leaving this week. We have found prices from C$ 302 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as C$ 378.

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

Our data shows that January tends to be the cheapest month to fly to USA from Region of Ontario. Users have commonly found prices around C$ 332 for the month, but tickets can be as low as C$ 167. Due to multiple factors, prepare for potentially higher prices in December.

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

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

How can I find direct flights from Ontario to USA?

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

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

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

C$ 193+ Flights from Ontario to the United States

Cheap flight deals from Ontario to USA

Round-trip from	C$ 150
One-way from	C$ 118
Popular in	December
Cheapest in	January
Average price	C$ 313
Good round-trip deal	C$ 127 or less
Good one-way deal	C$ 85 or less

WestJet
30/5-6/6
2 total stops
21h 15m total
Ontario to USA

Search Deals

Flair Airlines
23/4
Nonstop
3h 20m total
Ontario to USA

Search Deals

Highest demand for flights based on searches. 3% potential increase in price (C$ 14 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 13 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from Ontario to USA.

Search Deals

Price to beat on a one-way flight from Ontario to USA.

Search Deals

Find flight deals from Ontario to USA

Cheapest flights from Ontario to USA
Explore the most affordable flight options available from Ontario to USA. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 April 2025.

Fri 30/512:00 p.m.YYZ - LAS

1 stop11h 21mWestJet

Fri 6/68:00 a.m.LAS - YYZ

1 stop9h 54mWestJet

Deal found 15/4C$ 150

Sun 1/66:30 a.m.YYZ - FLL

Nonstop3h 20mFlair Airlines

Tue 3/610:50 a.m.FLL - YYZ

Nonstop3h 15mFlair Airlines

Deal found 14/4C$ 167

Sat 26/47:25 p.m.YYZ - LAS

Nonstop5h 03mPorter Airlines

Fri 2/59:55 a.m.LAS - YYZ

Nonstop4h 25mPorter Airlines

Deal found 15/4C$ 181

Fri 9/57:00 a.m.YUL - FLL

2 stops12h 35mPorter Airlines

Tue 13/51:50 p.m.FLL - YUL

2 stops8h 25mPorter Airlines

Deal found 15/4C$ 182

Wed 23/47:25 p.m.YYZ - LAS

Nonstop5h 03mMultiple Airlines

Fri 2/511:30 a.m.LAS - YYZ

1 stop9h 56mMultiple Airlines

Deal found 14/4C$ 184

Tue 24/66:30 a.m.YYZ - LAX

1 stop10h 42mWestJet

Wed 2/73:00 p.m.LAX - YYZ

2 stops11h 51mWestJet

Deal found 15/4C$ 189

Thu 1/57:55 a.m.YYZ - JFK

Nonstop2h 05mFlair Airlines

Sun 4/510:45 a.m.JFK - YYZ

Nonstop1h 45mFlair Airlines

Deal found 15/4C$ 196

Tue 6/51:30 p.m.YYZ - FLL

Nonstop3h 16mWestJet

Tue 13/55:40 p.m.FLL - YYZ

Nonstop3h 20mWestJet

Deal found 14/4C$ 199

Sun 25/511:00 a.m.YYZ - FLL

1 stop8h 31mMultiple Airlines

Tue 3/610:50 a.m.FLL - YYZ

Nonstop3h 15mMultiple Airlines

Deal found 14/4C$ 204

Thu 1/57:25 p.m.YYZ - LGA

Nonstop1h 40mPorter Airlines

Sun 11/59:55 a.m.LGA - YYZ

Nonstop1h 40mPorter Airlines

Deal found 15/4C$ 209

Sun 22/610:40 a.m.YYZ - LAX

Nonstop5h 25mMultiple Airlines

Tue 1/712:35 p.m.LAX - YYZ

1 stop9h 09mMultiple Airlines

Deal found 15/4C$ 216

Tue 6/59:35 a.m.YYZ - FLL

Nonstop3h 13mPorter Airlines

Tue 13/58:35 p.m.FLL - YYZ

Nonstop3h 20mPorter Airlines

Deal found 14/4C$ 216

Best flights from Ontario to USA
Discover carefully curated flight deals from Ontario to USA that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 15 April 2025.

Fri 30/512:00 p.m.YYZ - LAS

1 stop11h 21mWestJet

Fri 6/68:00 a.m.LAS - YYZ

1 stop9h 54mWestJet

Deal found 15/4C$ 150

Sun 25/56:30 a.m.YYZ - FLL

Nonstop3h 20mFlair Airlines

Tue 3/610:50 a.m.FLL - YYZ

Nonstop3h 15mFlair Airlines

Deal found 15/4C$ 165

Tue 29/45:50 p.m.YYZ - LAS

Nonstop5h 03mMultiple Airlines

Fri 2/511:30 a.m.LAS - YYZ

1 stop9h 56mMultiple Airlines

Deal found 15/4C$ 174

Sat 3/58:35 p.m.YYZ - LAS

Nonstop4h 55mAir Canada

Mon 12/511:30 p.m.LAS - YYZ

Nonstop4h 19mAir Canada

Deal found 15/4C$ 175

Thu 1/57:00 a.m.YUL - FLL

2 stops12h 35mPorter Airlines

Thu 8/51:50 p.m.FLL - YUL

2 stops8h 25mPorter Airlines

Deal found 14/4C$ 182

Sat 31/59:00 a.m.YYZ - LAS

2 stops15h 52mUnited Airlines

Sat 7/66:00 a.m.LAS - YYZ

1 stop13h 48mUnited Airlines

Deal found 15/4C$ 232

Sat 26/47:47 a.m.YUL - FLL

2 stops10h 50mAmerican Airlines

Fri 2/56:00 a.m.FLL - YUL

1 stop7h 39mAmerican Airlines

Deal found 14/4C$ 271

Tue 29/47:55 a.m.YYZ - LGA

Nonstop1h 39mDelta

Sun 4/57:45 a.m.LGA - YYZ

Nonstop1h 45mDelta

Deal found 14/4C$ 289

Thu 3/76:45 a.m.YUL - FLL

Nonstop3h 35mAir Transat

Mon 7/711:25 a.m.FLL - YUL

Nonstop3h 25mAir Transat

Deal found 14/4C$ 328

Sat 24/57:55 a.m.YYZ - JFK

Nonstop2h 05mFlair Airlines

Sat 31/510:45 a.m.JFK - YYZ

Nonstop1h 45mFlair Airlines

Deal found 15/4C$ 165

Tue 24/66:30 a.m.YYZ - LAX

1 stop10h 42mWestJet

Wed 2/73:00 p.m.LAX - YYZ

2 stops11h 51mWestJet

Deal found 15/4C$ 189

Sun 25/58:00 a.m.YYZ - FLL

1 stop6h 51mMultiple Airlines

Tue 3/610:50 a.m.FLL - YYZ

Nonstop3h 15mMultiple Airlines

Deal found 15/4C$ 192

Direct flights from Ontario to USA
Explore direct flight options from Ontario to USA based on user searches, and compare prices and availability for your desired travel dates. Data last updated 15 April 2025.

Sun 1/66:30 a.m.YYZ - FLL

Nonstop3h 20mFlair Airlines

Tue 3/610:50 a.m.FLL - YYZ

Nonstop3h 15mFlair Airlines

Deal found 15/4C$ 165

Sat 3/58:35 p.m.YYZ - LAS

Nonstop4h 55mAir Canada

Mon 12/511:30 p.m.LAS - YYZ

Nonstop4h 19mAir Canada

Deal found 15/4C$ 175

Sat 26/47:25 p.m.YYZ - LAS

Nonstop5h 03mPorter Airlines

Fri 2/59:55 a.m.LAS - YYZ

Nonstop4h 25mPorter Airlines

Deal found 15/4C$ 181

Sat 3/57:00 a.m.YYZ - LAS

Nonstop4h 53mMultiple Airlines

Wed 7/512:35 p.m.LAS - YYZ

Nonstop4h 24mMultiple Airlines

Deal found 15/4C$ 185

Thu 1/57:55 a.m.YYZ - JFK

Nonstop2h 05mFlair Airlines

Sun 4/510:45 a.m.JFK - YYZ

Nonstop1h 45mFlair Airlines

Deal found 15/4C$ 196

Fri 6/61:30 p.m.YYZ - FLL

Nonstop3h 16mWestJet

Thu 12/65:40 p.m.FLL - YYZ

Nonstop3h 20mWestJet

Deal found 15/4C$ 199

Tue 6/59:35 a.m.YYZ - FLL

Nonstop3h 13mPorter Airlines

Tue 13/58:35 p.m.FLL - YYZ

Nonstop3h 20mPorter Airlines

Deal found 15/4C$ 203

Thu 1/57:25 p.m.YYZ - LGA

Nonstop1h 40mPorter Airlines

Sun 11/59:55 a.m.LGA - YYZ

Nonstop1h 40mPorter Airlines

Deal found 15/4C$ 209

Thu 24/48:00 p.m.YYZ - LAS

Nonstop5h 13mWestJet

Thu 1/512:35 p.m.LAS - YYZ

Nonstop4h 24mWestJet

Deal found 15/4C$ 209

Tue 13/51:30 p.m.YYZ - FLL

Nonstop3h 16mMultiple Airlines

Sat 17/510:50 a.m.FLL - YYZ

Nonstop3h 15mMultiple Airlines

Deal found 14/4C$ 211

Sun 22/610:40 a.m.YYZ - LAX

Nonstop5h 25mMultiple Airlines

Mon 30/611:10 p.m.LAX - YYZ

Nonstop4h 50mMultiple Airlines

Deal found 15/4C$ 224

Wed 7/58:55 p.m.YYZ - JFK

Nonstop1h 50mMultiple Airlines

Thu 8/510:45 a.m.JFK - YYZ

Nonstop1h 45mMultiple Airlines

Deal found 14/4C$ 227

Last-minute flights from Ontario to USA
Discover last-minute flight deals from Ontario to USA. Data last updated 15 April 2025 and is based on user searches.

Wed 16/49:15 a.m.YUL - FLL

1 stop6h 05mUnited Airlines

Wed 30/46:15 a.m.FLL - YUL

1 stop8h 09mUnited Airlines

Deal found 15/4C$ 243

Mon 21/47:25 p.m.YYZ - LAS

Nonstop5h 03mPorter Airlines

Mon 5/59:55 a.m.LAS - YYZ

Nonstop4h 25mPorter Airlines

Deal found 14/4C$ 204

Tue 22/46:35 p.m.YUL - FLL

Nonstop3h 50mMultiple Airlines

Tue 13/55:40 p.m.FLL - YUL

1 stop6h 57mMultiple Airlines

Deal found 14/4C$ 218

Tue 22/47:10 a.m.YYZ - FLL

1 stop5h 54mPorter Airlines

Mon 28/42:10 p.m.FLL - YYZ

1 stop7h 16mPorter Airlines

Deal found 14/4C$ 231

Tue 22/44:30 p.m.YUL - FLL

Nonstop3h 36mAir Canada

Tue 29/47:28 p.m.FLL - YUL

1 stop15h 00mAir Canada

Deal found 15/4C$ 250

Wed 23/47:25 p.m.YYZ - LAS

Nonstop5h 03mMultiple Airlines

Wed 30/46:20 p.m.LAS - YYZ

1 stop8h 54mMultiple Airlines

Deal found 14/4C$ 184

Wed 23/46:45 a.m.YUL - FLL

1 stop6h 26mPorter Airlines

Wed 14/56:30 p.m.FLL - YUL

1 stop6h 07mPorter Airlines

Deal found 14/4C$ 195

Wed 23/46:30 a.m.YYZ - FLL

Nonstop3h 20mMultiple Airlines

Mon 28/42:10 p.m.FLL - YYZ

1 stop7h 16mMultiple Airlines

Deal found 14/4C$ 235

Wed 23/48:10 p.m.YYZ - LAS

Nonstop4h 57mAir Canada

Mon 5/510:45 p.m.LAS - YYZ

1 stop10h 30mAir Canada

Deal found 14/4C$ 238

Wed 23/43:59 p.m.YYZ - LAS

1 stop10h 16mUnited Airlines

Tue 29/411:53 a.m.LAS - YYZ

1 stop9h 48mUnited Airlines

Deal found 14/4C$ 245

Thu 24/47:55 a.m.YYZ - JFK

Nonstop2h 05mFlair Airlines

Sat 10/510:45 a.m.JFK - YYZ

Nonstop1h 45mFlair Airlines

Deal found 13/4C$ 236

Fri 25/48:00 p.m.YYZ - LAS

Nonstop5h 13mWestJet

Wed 30/46:20 p.m.LAS - YYZ

1 stop8h 54mWestJet

Deal found 14/4C$ 188

One-way flights from Ontario to USA
Search for one-way flight options from Ontario to USA. Find affordable one-way fares based on user searches. Data last updated 15 April 2025.

Wed 23/46:30 a.m.YYZ - FLL

Nonstop3h 20mFlair Airlines

Deal found 15/4C$ 118

Tue 22/46:35 p.m.YUL - FLL

Nonstop3h 50mPorter Airlines

Deal found 15/4C$ 124

Mon 9/610:00 a.m.YYZ - LAS

2 stops12h 38mWestJet

Deal found 15/4C$ 128

Mon 23/67:00 a.m.YYZ - LAS

Nonstop4h 53mPorter Airlines

Deal found 15/4C$ 134

Tue 17/612:00 p.m.YYZ - LAX

1 stop9h 10mWestJet

Deal found 15/4C$ 135

Mon 5/51:30 p.m.YYZ - FLL

Nonstop3h 16mWestJet

Deal found 15/4C$ 135

Wed 23/44:30 p.m.YUL - FLL

Nonstop3h 36mAir Canada

Deal found 14/4C$ 138

Tue 22/46:30 a.m.YUL - FLL

Nonstop3h 50mAir Transat

Deal found 14/4C$ 139

Tue 27/56:55 a.m.YYZ - EWR

1 stop5h 35mPorter Airlines

Deal found 15/4C$ 140

Tue 13/59:35 a.m.YYZ - FLL

Nonstop3h 13mPorter Airlines

Deal found 15/4C$ 142

Sun 20/43:55 p.m.YUL - FLL

Nonstop3h 50mFlair Airlines

Deal found 14/4C$ 143

Fri 2/56:10 a.m.YYZ - LAS

1 stop18h 45mUnited Airlines

Deal found 15/4C$ 145

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to the United States that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Fri 30/5

12:00 p.m.-8:21 p.m.

1 stop11h 21m

Las Vegas Harry Reid Intl

Fri 6/6

8:00 a.m.-8:54 p.m.

1 stop9h 54m

C$ 150

TorontoFort Lauderdale

YYZ - FLL

YYZFLL

Toronto Pearson Intl

Sun 25/5

6:30 a.m.-9:50 a.m.

Nonstop3h 20m

Fort Lauderdale

Tue 3/6

10:50 a.m.-2:05 p.m.

Nonstop3h 15m

C$ 156

TorontoNew York

YYZ - JFK

YYZJFK

Toronto Pearson Intl

Thu 1/5

7:55 a.m.-10:00 a.m.

Nonstop2h 05m

New York John F Kennedy Intl

Sun 4/5

10:45 a.m.-12:30 p.m.

Nonstop1h 45m

C$ 179

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Sat 26/4

7:25 p.m.-9:28 p.m.

Nonstop5h 03m

Las Vegas Harry Reid Intl

Fri 2/5

6:20 p.m.-6:14 a.m.

1 stop8h 54m

C$ 181

MontrealFort Lauderdale

YUL - FLL

YULFLL

Montreal Pierre Elliott Trudeau Intl

Fri 9/5

7:00 a.m.-7:35 p.m.

2 stops12h 35m

Fort Lauderdale

Tue 13/5

1:50 p.m.-10:15 p.m.

2 stops8h 25m

C$ 182

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Tue 29/4

5:50 p.m.-7:53 p.m.

Nonstop5h 03m

Las Vegas Harry Reid Intl

Mon 5/5

11:10 p.m.-6:35 a.m.

Nonstop4h 25m

C$ 182

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Tue 24/6

6:30 a.m.-2:12 p.m.

1 stop10h 42m

Los Angeles

Wed 2/7

3:00 p.m.-5:51 a.m.

2 stops11h 51m

C$ 189

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Fri 2/5

4:30 p.m.-10:19 p.m.

1 stop8h 49m

Las Vegas Harry Reid Intl

Mon 5/5

11:20 p.m.-11:39 a.m.

1 stop9h 19m

C$ 192

TorontoFort Lauderdale

YYZ - FLL

YYZFLL

Toronto Pearson Intl

Sun 25/5

8:00 a.m.-2:51 p.m.

1 stop6h 51m

Fort Lauderdale

Tue 3/6

10:50 a.m.-2:05 p.m.

Nonstop3h 15m

C$ 192

TorontoFort Lauderdale

YYZ - FLL

YYZFLL

Toronto Pearson Intl

Tue 6/5

1:30 p.m.-4:46 p.m.

Nonstop3h 16m

Fort Lauderdale

Tue 13/5

5:40 p.m.-9:00 p.m.

Nonstop3h 20m

C$ 199

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/4

Showing 1-10 of 60 results

...

Best time to book a flight from Ontario to USA

Have a flexible travel schedule? Discover the best time to fly to USA from Ontario 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 Ontario to the United States

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

Currently, September is the cheapest month in which you can book a flight from Region of Ontario to USA (average of C$ 230). Flying from Region of Ontario to USA in July is currently the most expensive (average of C$ 314). 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 ON to US?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to USA as you normally would.

Weekly flight availability from Region of Ontario to USA

The most flights from CAON to US0 are scheduled on a Monday (19 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (14 on average).

Rainfall in USA by month

In terms of precipitation, rainfall in USA ranges from 61.0 - 221.0 mm per month. June is typically the wettest month, when rainfall can reach 221.0 mm. November is typically the driest time to visit USA when rainfall is around 61.0 mm.

Temperature in USA by month

If weather is an important factor for your trip to USA, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 16.0 C).

Reviews of airlines servicing USA

Read reviews from past customers who have flown Delta, Alaska Airlines and Porter Airlines from Ontario to USA. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very good

7,917 reviews

Delta

8.0

Very good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Alaska Airlines

8.0

Very good

9,876 reviews

Delta

8.0

Very good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Porter Airlines

8.0

Very good

281 reviews

Delta

8.0

Very good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,323 reviews

Delta

8.0

Very good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air Transat

7.8

Good

385 reviews

Delta

8.0

Very good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What are the cheapest airlines to fly from Region of Ontario to USA one-way?
The cheapest airline one-way is Flair Airlines, with whom users have recently found tickets for as low as C$ 118. However, be on the lookout for offers from Porter Airlines and WestJet, as they are both options that can get you from Region of Ontario to USA for a low price.
Can I find deals for flights from Ontario to USA that include hotel bookings?
Yes. In addition to deals on Ontario to USA flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to USA?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to USA.
Can I find deals for business class flights from Ontario to USA?
Yes. Cheapflights offers flight deals from Ontario to USA 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 Region of Ontario to USA?
Currently, September is the cheapest month in which you can book a flight from Region of Ontario to USA (average of C$ 230). Flying from Region of Ontario to USA in July is currently the most expensive (average of C$ 314). 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

Top 10 airlines flying from Ontario to USA

Airline	Cheapest	Average	Flexibility	On-time
Frontier	CheapestC$ 115	AverageC$ 253	FlexibilityNo cancel fee	On-time62%	Search Frontier flights
Flair Airlines	CheapestC$ 136	AverageC$ 314	FlexibilityNo cancel fee	On-timeN/A	Search Flair Airlines flights
WestJet	CheapestC$ 167	AverageC$ 473	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Porter Airlines	CheapestC$ 178	AverageC$ 443	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
Delta	CheapestC$ 179	AverageC$ 500	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Air Transat	CheapestC$ 209	AverageC$ 423	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
Air Canada	CheapestC$ 210	AverageC$ 575	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
American Airlines	CheapestC$ 227	AverageC$ 530	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
United Airlines	CheapestC$ 242	AverageC$ 573	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Canada Jetlines	CheapestC$ 281	AverageC$ 387	FlexibilityNo cancel fee	On-time58%	Search Canada Jetlines flights

Fly with Cheapflights

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

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

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

Yes! Cheapflights helps users easily find flights from Ontario to USA with no change fees.

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Not ready to book yet? You can track prices for flights from Ontario to USA on Cheapflights with our Price Alert feature and get notified when better prices are available.

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Cheap flights from Ontario to the United States from C$ 118

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 23/4. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ontario to USA

Keep the following information in mind while searching for Ontario to USA flight deals. Data was last updated 15 April 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Ontario to USA

Cheapest flights from Ontario to USAExplore the most affordable flight options available from Ontario to USA. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 April 2025.

Explore the most affordable flight options available from Ontario to USA. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 April 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to the United States that are best for you.

Best time to book a flight from Ontario to USA

Have a flexible travel schedule? Discover the best time to fly to USA from Ontario with our price prediction graph.

Cheapflights Insights

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

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

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

Find hourly flight availability from Ontario to USA. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 April 2025.

Weekly flight availability from Region of Ontario to USA

Explore weekly flight availability from Ontario to USA. 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 15 April 2025.

Rainfall in USA by month

Plan your trip to USA by taking into account the average rainfall totals by month.

Temperature in USA by month

Plan your trip to USA by taking into account the average temperature totals by month.

Reviews of airlines servicing USA

Get insights into the airlines that provide service to USA. 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 USA. Reviews last updated 15 April 2025.

Read reviews from past customers who have flown Delta, Alaska Airlines and Porter Airlines from Ontario to USA. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

How can I find direct flights from Ontario to USA?

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

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

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Alternative routes for Ontario to USA

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Top 10 airlines flying from Ontario to USA

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Cheapest flights from Ontario to USA
Explore the most affordable flight options available from Ontario to USA. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 April 2025.