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$148+ Cheap flights from Greenville (GSP) to Ontario

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 4/10. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — YYZ
Mar 17 — Mar 241
Tue 3/17
Tue 3/24
1 adult, Economy
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Cheap flight deals from Greenville to Ontario

Cheapest flights from Greenville to Ontario
Explore the most affordable flight options available from Greenville to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 15, 2026.

This United Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:12 am
GSP
-
YOW
1 stop7h 22m
United Airlines
Mon 3/25:48 pm
YOW
-
GSP
1 stop6h 11m
United Airlines
Deal found 2/11$355
This Kiwi.com deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/299:46 pm
GSP
-
YYZ
2 stops26h 28m
Multiple Airlines
Sun 4/53:40 pm
YYZ
-
GSP
1 stop26h 03m
Multiple Airlines
Deal found 2/11$364
This Kiwi.com deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/14:55 pm
GSP
-
YUL
1 stop22h 10m
Multiple Airlines
Sun 3/88:00 am
YUL
-
GSP
1 stop7h 51m
Multiple Airlines
Deal found 2/15$399
This Kiwi.com deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:05 pm
GSP
-
YYZ
1 stop23h 50m
Multiple Airlines
Sun 6/75:45 pm
YYZ
-
GSP
1 stop21h 58m
Multiple Airlines
Deal found 2/12$413
This American Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/318:17 pm
GSP
-
YUL
1 stop18h 41m
American Airlines
Tue 4/712:30 pm
YUL
-
GSP
1 stop10h 33m
American Airlines
Deal found 2/13$418
This American Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/257:07 am
GSP
-
YYZ
1 stop9h 34m
American Airlines
Fri 3/2710:58 am
YYZ
-
GSP
1 stop8h 09m
American Airlines
Deal found 2/13$436
This American Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/38:14 pm
GSP
-
YUL
1 stop15h 30m
American Airlines
Sat 5/912:30 pm
YUL
-
GSP
1 stop10h 33m
American Airlines
Deal found 2/13$438
This American Airlines deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/28:16 pm
GSP
-
YUL
1 stop15h 28m
American Airlines
Sat 5/912:30 pm
YUL
-
GSP
1 stop10h 33m
American Airlines
Deal found 2/15$440
This Kiwi.com deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/294:55 pm
GSP
-
YUL
1 stop22h 10m
Multiple Airlines
Sun 4/56:45 am
YUL
-
GSP
1 stop9h 02m
Multiple Airlines
Deal found 2/12$441
This American Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/257:07 am
GSP
-
YYZ
1 stop9h 34m
American Airlines
Sun 3/2911:00 am
YYZ
-
GSP
1 stop11h 05m
American Airlines
Deal found 2/13$445
This Air Canada deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:12 am
GSP
-
YOW
2 stops11h 06m
Air Canada
Mon 3/25:48 pm
YOW
-
GSP
1 stop6h 11m
Air Canada
Deal found 2/12$445
This Kiwi.com deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/299:46 pm
GSP
-
YOW
2 stops19h 19m
Multiple Airlines
Sun 4/54:15 pm
YOW
-
GSP
1 stop25h 28m
Multiple Airlines
Deal found 2/12$448

Find flight deals from Greenville to Ontario

Keep the following information in mind while searching for Greenville to Ontario flight deals. Data was last updated February 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$355
(United Airlines)

One-way from

$148
(Kiwi.com)

Popular in

October

Cheapest in

January
Provider with most accurate pricing for Greenville-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Greenville-Toronto (YTO) flights.
Search Deals
From Greenville to Ontario
Search Deals
One-way flight from Greenville to Ontario
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($89 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Greenville 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 2,558,603 searches. Data last updated February 15, 2026.
Use the filters below to find and compare flights from Greenville to Ontario that are best for you.

Fly from

Greenville

Fly to

Ontario

Route

Depart

Return

Price

GreenvilleOttawa

GSP - YOW

GSPYOW

Greenville

Thu 2/26

6:12 am-1:34 pm

1 stop7h 22m

Ottawa

Mon 3/2

5:48 pm-11:59 pm

1 stop6h 11m

$355

GreenvilleOttawa

GSP - YOW

GSPYOW

Greenville

Sun 3/29

6:30 am-9:35 pm

1 stop15h 05m

Ottawa

Sun 4/5

6:10 am-11:14 am

1 stop5h 04m

$356

GreenvilleToronto

GSP - YYZ

GSPYYZ

Greenville

Sun 3/29

9:46 pm-12:14 am

2 stops26h 28m

Toronto Pearson Intl

Sun 4/5

3:40 pm-5:43 pm

1 stop26h 03m

$364

GreenvilleMontreal

GSP - YUL

GSPYUL

Greenville

Sun 3/1

4:55 pm-3:05 pm

1 stop22h 10m

Montreal Pierre Elliott Trudeau Intl

Sun 3/8

8:00 am-3:51 pm

1 stop7h 51m

$399

GreenvilleToronto

GSP - YYZ

GSPYYZ

Greenville

Mon 6/1

5:05 pm-4:55 pm

1 stop23h 50m

Toronto Pearson Intl

Sun 6/7

5:45 pm-3:43 pm

1 stop21h 58m

$413

GreenvilleMontreal

GSP - YUL

GSPYUL

Greenville

Tue 3/31

8:17 pm-2:58 pm

1 stop18h 41m

Montreal Pierre Elliott Trudeau Intl

Tue 4/7

12:30 pm-11:03 pm

1 stop10h 33m

$418

GreenvilleToronto

GSP - YYZ

GSPYYZ

Greenville

Wed 3/25

7:07 am-4:41 pm

1 stop9h 34m

Toronto Pearson Intl

Fri 3/27

10:58 am-7:07 pm

1 stop8h 09m

$436

GreenvilleMontreal

GSP - YUL

GSPYUL

Greenville

Sun 5/3

8:14 pm-11:44 am

1 stop15h 30m

Montreal Pierre Elliott Trudeau Intl

Sat 5/9

12:30 pm-11:03 pm

1 stop10h 33m

$438

GreenvilleMontreal

GSP - YUL

GSPYUL

Greenville

Sat 5/2

8:14 pm-11:44 am

1 stop15h 30m

Montreal Pierre Elliott Trudeau Intl

Sat 5/9

12:30 pm-11:03 pm

1 stop10h 33m

$440

GreenvilleMontreal

GSP - YUL

GSPYUL

Greenville

Sun 3/29

4:55 pm-3:05 pm

1 stop22h 10m

Montreal Pierre Elliott Trudeau Intl

Sun 4/5

6:45 am-3:47 pm

1 stop9h 02m

$441

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/12

Showing 1-10 of 31 results
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Best time to book a flight from Greenville to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Greenville 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 Greenville to Ontario

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

Currently, May is the cheapest month in which you can book a flight from Greenville to Region of Ontario (average of $132). Flying from Greenville to Region of Ontario in July is currently the most expensive (average of $574). 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.

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 February 15, 2026.
Read through reviews of airlines operating flights from Greenville to Ontario, such as Delta, United Airlines, and American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,205 reviews

Food

7.2

Overall

7.9

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,205 reviews
Delta
7.9
Good
8,205 reviews

Food

7.2

Overall

7.9

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,296 reviews
Delta
7.9
Good
8,205 reviews

Food

7.2

Overall

7.9

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,297 reviews
Delta
7.9
Good
8,205 reviews

Food

7.2

Overall

7.9

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

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

  • What airport do you fly from for flights from Greenville to Ontario?

    Greenville (GSP) is the airport you will fly out of if you book a flight from Greenville to Ontario. It is only a 10.4 mi journey to Greenville (GSP) from Greenville’s city center.

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

    Airlines like United Airlines and American Airlines fly from Greenville to Region of Ontario in about 7h 22m. The time it takes to get you to your destination can typically vary by up to 11h 19m. Greenville and Region of Ontario are separated by a distance of 798 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Greenville to Region of Ontario?

    While some choose either Greenville - Montreal Pierre Elliott Trudeau Intl or Greenville - Ottawa, Greenville - Toronto Pearson Intl is the most popular route from Greenville to Region of Ontario.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Greenville 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 Greenville to Region of Ontario?

    Currently, May is the cheapest month in which you can book a flight from Greenville to Region of Ontario (average of $132). Flying from Greenville to Region of Ontario in July is currently the most expensive (average of $574). 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

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Alternative routes for Greenville to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Greenville to Ontario

Discover the top 3 airlines that operate flights from Greenville 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 2,558,603 searches. Data last updated February 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$160Average$433FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$346Average$607FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$348Average$609FlexibilityNo cancel feeOn-time69%

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