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Greenville

$141+ 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 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — GSP
ene. 11 — ene. 181
dom. 1/11
dom. 1/18
1 adult, Economy
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Cheap 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 diciembre 12, 2025.

This Delta deal was found by Cheapflights users on 12/9. 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.
jue. 12/2511:15 amONT - GSP
1 stop8h 15mDelta
jue. 1/16:15 amGSP - ONT
1 stop6h 45mDelta
Deal found 12/9$503
This American Airlines deal was found by Cheapflights users on 12/11. 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.
mar. 12/302:49 pmONT - GSP
1 stop6h 03mAmerican Airlines
mar. 1/64:40 pmGSP - ONT
1 stop9h 08mAmerican Airlines
Deal found 12/11$504
This Delta deal was found by Cheapflights users on 12/9. 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.
jue. 12/2511:15 amONT - GSP
1 stop8h 15mDelta
mié. 12/315:45 pmGSP - ONT
1 stop29h 05mDelta
Deal found 12/9$527
This United Airlines deal was found by Cheapflights users on 12/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/2411:59 pmONT - GSP
2 stops11h 16mUnited Airlines
jue. 1/15:36 pmGSP - ONT
1 stop7h 49mUnited Airlines
Deal found 12/9$557
This American Airlines deal was found by Cheapflights users on 12/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/2512:55 pmONT - GSP
2 stops7h 57mAmerican Airlines
jue. 1/12:33 pmGSP - ONT
1 stop9h 25mAmerican Airlines
Deal found 12/9$572
This United Airlines deal was found by Cheapflights users on 12/11. 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.
mié. 12/3111:59 pmONT - GSP
1 stop7h 57mUnited Airlines
dom. 1/45:36 pmGSP - ONT
1 stop7h 49mUnited Airlines
Deal found 12/11$582
This American Airlines deal was found by Cheapflights users on 12/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/2412:55 pmONT - GSP
2 stops18h 16mAmerican Airlines
jue. 1/14:23 pmGSP - ONT
1 stop8h 51mAmerican Airlines
Deal found 12/9$597
This United Airlines deal was found by Cheapflights users on 12/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/2411:59 pmONT - GSP
2 stops11h 16mUnited Airlines
mié. 12/315:36 pmGSP - ONT
1 stop7h 49mUnited Airlines
Deal found 12/9$612

Find 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 diciembre 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$380
(Delta)

One-way from

$141
(Kiwi.com)

Popular in

February

Cheapest in

October

Average price

$554
Provider with most accurate pricing for Ontario-Greenville flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Greenville flights.
Search Deals
From Ontario to Greenville
Search Deals
One-way flight from Ontario to Greenville
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 diciembre 12, 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

jue. 1/22

6:00 am-3:50 pm

1 stop6h 50m

Greenville

dom. 1/25

4:40 pm-10:48 pm

1 stop9h 08m

$420

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

jue. 1/22

10:30 pm-9:19 am

1 stop7h 49m

Greenville

dom. 1/25

5:40 am-11:31 am

1 stop8h 51m

$420

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

mar. 3/10

10:30 pm-9:26 am

1 stop7h 56m

Greenville

mar. 3/17

5:40 am-11:35 am

1 stop8h 55m

$447

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

jue. 1/15

5:05 am-3:20 pm

1 stop7h 15m

Greenville

dom. 1/18

10:51 am-9:58 pm

2 stops14h 07m

$478

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

vie. 1/16

6:00 am-3:35 pm

1 stop6h 35m

Greenville

dom. 1/18

10:51 am-9:58 pm

2 stops14h 07m

$482

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

jue. 1/8

5:05 am-3:20 pm

1 stop7h 15m

Greenville

lun. 1/12

4:50 pm-9:58 pm

1 stop8h 08m

$493

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

mié. 1/21

7:15 am-8:58 am

3 stops46h 43m

$141

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

mié. 1/21

12:41 pm-11:50 pm

1 stop8h 09m

$184

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

vie. 1/23

6:00 am-3:35 pm

1 stop6h 35m

$224

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

jue. 4/9

7:00 am-4:54 pm

1 stop6h 54m

$224

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 18 results
1
2

Compare providers for flights from Ontario to Greenville

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Greenville in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Greenville flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Greenville flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Greenville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Greenville flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Greenville flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, January is the cheapest month in which you can book a flight from Ontario to Greenville (average of $42). Flying from Ontario to Greenville in December is currently the most expensive (average of $228). 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 diciembre 12, 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
7.9
Good
8,008 reviews

Food

7.3

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.9

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
7.9
Good
8,008 reviews
Delta
7.9
Good
8,008 reviews

Food

7.3

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.9

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
11,050 reviews
Delta
7.9
Good
8,008 reviews

Food

7.3

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.9

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 6h 50m. 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, Delta ($253), and American Airlines ($302) offers the cheapest pricing from Ontario to Greenville. These flights start at 40% lower than the current average price 3 months from now.

  • 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, January is the cheapest month in which you can book a flight from Ontario to Greenville (average of $42). Flying from Ontario to Greenville in December is currently the most expensive (average of $228). 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
Greer
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 diciembre 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$253Average$496FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$302Average$404FlexibilityNo cancel feeOn-time71%

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