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Greenville

$224+ Cheap flights from Ontario to Greenville (ONT - GSP)

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 12/29. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — GSP
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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Cheap flight deals from Ontario to Greenville

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Greenville (GSP). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated septiembre 11, 2025.

Round-trip from

$254
(United Airlines)

One-way from

$224
(Delta)

Popular in

February

Cheapest in

June

Average price

$342
From Ontario to Greenville
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One-way flight from Ontario to Greenville
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Highest demand for flights based on searches. 9% potential increase in price ($45 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Greenville

Cheapest flights from Ontario to Greenville
Explore the most affordable flight options available from Ontario to Greenville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/10. 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.
mié. 10/15:05 amONT - GSP
1 stop7h 03mUnited Airlines
sáb. 10/46:05 amGSP - ONT
2 stops15h 01mUnited Airlines
Deal found 9/10$254
This Southwest deal was found by Cheapflights users on 9/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/15:25 amONT - GSP
1 stop6h 15mSouthwest
sáb. 10/410:30 amGSP - ONT
1 stop10h 45mSouthwest
Deal found 9/10$356
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/312:45 pmONT - GSP
1 stop6h 05mAmerican Airlines
vie. 10/108:01 pmGSP - ONT
1 stop6h 58mAmerican Airlines
Deal found 9/11$371
This Southwest deal was found by Cheapflights users on 9/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/55:25 amONT - GSP
1 stop6h 05mSouthwest
dom. 12/78:00 amGSP - ONT
1 stop12h 15mSouthwest
Deal found 9/9$407
This United Airlines deal was found by Cheapflights users on 9/11. 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.
jue. 10/305:05 amONT - GSP
1 stop6h 54mUnited Airlines
dom. 11/24:17 pmGSP - ONT
1 stop7h 27mUnited Airlines
Deal found 9/11$472
This United Airlines deal was found by Cheapflights users on 9/10. 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.
jue. 10/97:02 amONT - GSP
1 stop6h 51mUnited Airlines
mar. 10/145:34 pmGSP - ONT
1 stop7h 56mUnited Airlines
Deal found 9/10$478
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/207:05 amONT - GSP
1 stop6h 11mDelta
mar. 9/232:33 pmGSP - ONT
1 stop7h 42mDelta
Deal found 9/9$487

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Greenville 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 septiembre 11, 2025.
Use the filters below to find and compare flights from Ontario to Greenville that are best for you.

Fly from

Ontario

Fly to

Greenville

Route

Depart

Return

Price

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

mié. 10/1

5:05 am-3:08 pm

1 stop7h 03m

Greenville

sáb. 10/4

6:05 am-6:06 pm

2 stops15h 01m

$254

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

jue. 1/22

6:37 am-3:31 pm

1 stop5h 54m

Greenville

dom. 1/25

7:15 am-1:48 pm

1 stop9h 33m

$326

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

mar. 3/3

11:05 am-9:41 pm

1 stop7h 36m

Greenville

mié. 3/4

2:32 pm-8:24 pm

1 stop8h 52m

$349

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

mié. 10/1

5:25 am-2:40 pm

1 stop6h 15m

Greenville

sáb. 10/4

10:30 am-6:15 pm

1 stop10h 45m

$356

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

vie. 12/5

5:25 am-2:30 pm

1 stop6h 05m

Greenville

dom. 12/7

8:00 am-5:15 pm

1 stop12h 15m

$407

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

lun. 12/29

10:29 pm-9:18 am

1 stop7h 49m

$224

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

lun. 10/27

5:05 am-2:59 pm

1 stop6h 54m

$228

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

lun. 12/29

7:18 pm-8:36 am

2 stops10h 18m

$229

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

lun. 11/24

5:05 am-4:53 pm

2 stops8h 48m

$233

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

mié. 9/24

5:10 am-4:53 pm

2 stops8h 43m

$299

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 13 results
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Best time to book a flight from Ontario to Greenville

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

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

Currently, August is the cheapest month in which you can book a flight from Ontario to Greenville (average of $322). Flying from Ontario to Greenville in March is currently the most expensive (average of $386). 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 Greenville

Get insights into the airlines that provide service to Greenville. 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 Greenville. Reviews last updated septiembre 11, 2025.
Peruse reviews from past customers who have flown with Delta and American Airlines from Ontario to Greenville to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Related info for your journey

Find useful and relevant information for your journey from Ontario to Greenville. 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 Ontario to Greenville?

    Departing from Ontario to Greenville will take you 5h 54m. The distance between Ontario and Greenville is about 2004 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Ontario to Greenville round-trip?

    According to our current data, American Airlines ($302), and Delta ($395) offers the cheapest pricing from Ontario to Greenville. These flights start at 28% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Ontario to Greenville one-way?

    One-way options have recently been found by users for as low as $224 on Delta. Other airlines that offer cheap prices include United Airlines from $228 and American Airlines from $229 one-way.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Ontario to Greenville (average of $322). Flying from Ontario to Greenville in March is currently the most expensive (average of $386). 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

Traveling to a place near Greenville?

Book flights to Greenville if you plan to visit one of these locations
Simpsonville
Duncan
Seneca
Anderson

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Top 2 airlines flying from Ontario to Greenville

Discover the top 2 airlines that operate flights from Ontario to Greenville. 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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$302Average$400FlexibilityNo cancel feeOn-time71%
DeltaCheapest$395Average$512FlexibilityNo cancel feeOn-timeN/A

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