$150+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — GSP
Jul 12 — Jul 191
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Greenville with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Greenville
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Cheapest flights from Ontario to GreenvilleExplore 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 June 12, 2026.
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 June 12, 2026.
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/17:05 am
ONT
- GSP
1 stop8h 40m
Delta
Wed 9/96:45 am
GSP
- ONT
1 stop7h 19m
Delta
Deal found 6/10![Delta logo]()
$299
This Southwest deal was found by Cheapflights users on 6/10. 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.
Tue 9/17:25 am
ONT
- GSP
1 stop6h 20m
Southwest
Wed 9/97:00 am
GSP
- ONT
2 stops8h 30m
Southwest
Deal found 6/10![Southwest logo]()
$306
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:05 am
ONT
- GSP
1 stop8h 40m
Delta
Tue 8/186:55 am
GSP
- ONT
1 stop6h 47m
Delta
Deal found 6/10![Delta logo]()
$359
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1710:00 pm
ONT
- GSP
1 stop8h 18m
Delta
Sat 8/226:00 am
GSP
- ONT
1 stop7h 42m
Delta
Deal found 6/11![Delta logo]()
$363
This Southwest deal was found by Cheapflights users on 6/10. 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.
Mon 8/1710:00 am
ONT
- GSP
1 stop8h 35m
Southwest
Sat 8/2212:55 pm
GSP
- ONT
2 stops10h 55m
Southwest
Deal found 6/10![Southwest logo]()
$368
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2310:00 pm
ONT
- GSP
1 stop8h 18m
Delta
Wed 8/265:46 am
GSP
- ONT
1 stop7h 56m
Delta
Deal found 6/12![Delta logo]()
$383
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/27:05 am
ONT
- GSP
1 stop8h 40m
Delta
Tue 9/86:45 am
GSP
- ONT
1 stop7h 19m
Delta
Deal found 6/10![Delta logo]()
$389
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Mon 8/1712:33 pm
ONT
- GSP
1 stop6h 44m
American Airlines
Sat 8/227:00 am
GSP
- ONT
1 stop7h 43m
American Airlines
Deal found 6/11![American Airlines logo]()
$391
This Southwest deal was found by Cheapflights users on 6/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2311:55 pm
ONT
- GSP
2 stops9h 35m
Southwest
Wed 8/267:00 am
GSP
- ONT
2 stops10h 05m
Southwest
Deal found 6/12![Southwest logo]()
$394
This Southwest deal was found by Cheapflights users on 6/10. 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.
Wed 9/28:25 am
ONT
- GSP
2 stops9h 30m
Southwest
Tue 9/811:00 am
GSP
- ONT
1 stop10h 55m
Southwest
Deal found 6/10![Southwest logo]()
$395
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Tue 7/712:35 pm
ONT
- GSP
1 stop7h 41m
American Airlines
Tue 7/145:28 pm
GSP
- ONT
1 stop9h 31m
American Airlines
Deal found 6/11![American Airlines logo]()
$403
Best flights from Ontario to GreenvilleDiscover carefully curated flight deals from Ontario to Greenville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2026.
Discover carefully curated flight deals from Ontario to Greenville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2026.
This Southwest deal was found by Cheapflights users on 6/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2311:55 pm
ONT
- GSP
2 stops9h 35m
Southwest
Wed 8/267:00 am
GSP
- ONT
2 stops10h 05m
Southwest
Deal found 6/12![Southwest logo]()
$394
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Sat 8/85:45 am
ONT
- GSP
1 stop7h 14m
United Airlines
Wed 8/124:33 pm
GSP
- ONT
1 stop7h 20m
United Airlines
Deal found 6/8![United Airlines logo]()
$473
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/911:48 am
ONT
- GSP
1 stop9h 06m
Delta
Sun 7/125:16 pm
GSP
- ONT
1 stop7h 34m
Delta
Deal found 6/10![Delta logo]()
$502
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:45 am
ONT
- GSP
2 stops10h 15m
Southwest
Tue 7/147:00 am
GSP
- ONT
2 stops10h 05m
Southwest
Deal found 6/11![Southwest logo]()
$505
This United Airlines deal was found by Cheapflights users on 6/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/155:00 am
ONT
- GSP
1 stop7h 14m
United Airlines
Thu 9/244:25 pm
GSP
- ONT
1 stop7h 33m
United Airlines
Deal found 6/12![United Airlines logo]()
$553
This United Airlines deal was found by Cheapflights users on 6/7. 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.
Wed 8/55:00 am
ONT
- GSP
1 stop7h 19m
United Airlines
Sat 8/85:43 pm
GSP
- ONT
1 stop8h 08m
United Airlines
Deal found 6/7![United Airlines logo]()
$577
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1211:55 am
ONT
- GSP
2 stops8h 30m
Southwest
Wed 7/157:00 am
GSP
- ONT
2 stops8h 40m
Southwest
Deal found 6/11![Southwest logo]()
$597
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Tue 8/111:56 pm
ONT
- GSP
2 stops16h 40m
United Airlines
Tue 8/1810:33 am
GSP
- ONT
2 stops12h 28m
United Airlines
Deal found 6/10![United Airlines logo]()
$583
This United Airlines deal was found by Cheapflights users on 6/7. 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.
Tue 10/275:00 am
ONT
- GSP
2 stops13h 11m
United Airlines
Wed 10/282:23 pm
GSP
- ONT
2 stops11h 43m
United Airlines
Deal found 6/7![United Airlines logo]()
$587
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Mon 6/295:00 am
ONT
- GSP
1 stop7h 19m
United Airlines
Fri 7/35:43 pm
GSP
- ONT
1 stop8h 08m
United Airlines
Deal found 6/8![United Airlines logo]()
$647
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Sat 7/46:10 am
ONT
- GSP
1 stop7h 50m
United Airlines
Sun 7/124:15 pm
GSP
- ONT
1 stop7h 27m
United Airlines
Deal found 6/11![United Airlines logo]()
$694
Last-minute flights from Ontario to GreenvilleDiscover last-minute flight deals from Ontario to Greenville. Data last updated June 12, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Greenville. Data last updated June 12, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/3012:41 pm
ONT
- GSP
1 stop7h 15m
American Airlines
Wed 7/295:28 pm
GSP
- ONT
1 stop9h 31m
American Airlines
Deal found 6/10![American Airlines logo]()
$495
This American Airlines deal was found by Cheapflights users on 6/9. 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.
Fri 7/312:35 pm
ONT
- GSP
1 stop7h 41m
American Airlines
Wed 7/85:28 pm
GSP
- ONT
1 stop9h 31m
American Airlines
Deal found 6/9![American Airlines logo]()
$470
This American Airlines deal was found by Cheapflights users on 6/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/712:35 pm
ONT
- GSP
1 stop7h 41m
American Airlines
Tue 7/148:01 pm
GSP
- ONT
1 stop6h 58m
American Airlines
Deal found 6/12![American Airlines logo]()
$363
This Southwest deal was found by Cheapflights users on 6/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/79:45 am
ONT
- GSP
2 stops9h 20m
Southwest
Tue 7/147:00 am
GSP
- ONT
2 stops8h 40m
Southwest
Deal found 6/12![Southwest logo]()
$498
This American Airlines deal was found by Cheapflights users on 6/8. 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.
Fri 7/107:00 am
ONT
- GSP
1 stop6h 36m
American Airlines
Fri 7/178:01 pm
GSP
- ONT
1 stop6h 58m
American Airlines
Deal found 6/8![American Airlines logo]()
$464
This Delta deal was found by Cheapflights users on 6/7. 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.
Fri 7/1710:00 pm
ONT
- GSP
1 stop8h 18m
Delta
Wed 7/293:06 pm
GSP
- ONT
1 stop6h 24m
Delta
Deal found 6/7![Delta logo]()
$467
This American Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2010:10 pm
ONT
- GSP
1 stop9h 02m
American Airlines
Wed 7/225:28 pm
GSP
- ONT
1 stop9h 31m
American Airlines
Deal found 6/10![American Airlines logo]()
$435
This Southwest deal was found by Cheapflights users on 6/10. 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.
Mon 7/209:40 pm
ONT
- GSP
1 stop12h 30m
Southwest
Wed 7/227:00 am
GSP
- ONT
2 stops10h 05m
Southwest
Deal found 6/10![Southwest logo]()
$446
One-way flights from Ontario to GreenvilleSearch for one-way flight options from Ontario to Greenville. Find affordable one-way fares based on user searches. Data last updated June 12, 2026.
Search for one-way flight options from Ontario to Greenville. Find affordable one-way fares based on user searches. Data last updated June 12, 2026.
This American Airlines deal was found by Cheapflights users on 6/9. 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.
Tue 9/2212:37 pm
ONT
- GSP
1 stop6h 34m
American Airlines
Deal found 6/9![American Airlines logo]()
$150
This United Airlines deal was found by Cheapflights users on 6/9. 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.
Tue 9/226:00 am
ONT
- GSP
2 stops14h 15m
United Airlines
Deal found 6/9![United Airlines logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/156:00 am
ONT
- GSP
3 stops53h 41m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$197
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1410:00 pm
ONT
- GSP
1 stop8h 13m
Delta
Deal found 6/10![Delta logo]()
$202
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Tue 8/255:00 am
ONT
- GSP
1 stop7h 15m
United Airlines
Deal found 6/11![United Airlines logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/143:40 pm
ONT
- GSP
2 stops36h 55m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$208
This Delta deal was found by Cheapflights users on 6/8. 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.
Fri 7/1710:00 pm
ONT
- GSP
1 stop8h 18m
Delta
Deal found 6/8![Delta logo]()
$234
This United Airlines deal was found by Cheapflights users on 6/9. 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.
Thu 8/65:00 am
ONT
- GSP
1 stop7h 19m
United Airlines
Deal found 6/9![United Airlines logo]()
$237
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/1510:00 pm
ONT
- GSP
1 stop8h 13m
Delta
Deal found 6/10![Delta logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/229:49 pm
ONT
- GSP
3 stops38h 00m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$253
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Sat 7/46:10 am
ONT
- GSP
1 stop7h 50m
United Airlines
Deal found 6/11![United Airlines logo]()
$257
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 June 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $299 (Delta) |
One-way from | $150 (American Airlines) |
Popular in | February |
Cheapest in | October |
Average price | $455 |
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 June 12, 2026.
Use the filters below to find and compare flights from Ontario to Greenville that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioGreenville
ONT - GSP
ONTGSP
Ontario
Sun 8/23
11:55 pm-12:30 pm
2 stops9h 35m
Greenville
Wed 8/26
7:00 am-2:05 pm
2 stops10h 05m
$394
Quickest round-trip
OntarioGreenville
ONT - GSP
ONTGSP
Ontario
Sat 8/8
5:45 am-3:59 pm
1 stop7h 14m
Greenville
Wed 8/12
4:33 pm-8:53 pm
1 stop7h 20m
$473
OntarioGreenville
ONT - GSP
ONTGSP
Ontario
Thu 7/9
11:48 am-11:54 pm
1 stop9h 06m
Greenville
Sun 7/12
5:16 pm-9:50 pm
1 stop7h 34m
$502
OntarioGreenville
ONT - GSP
ONTGSP
Ontario
Tue 7/7
5:45 am-7:00 pm
2 stops10h 15m
Greenville
Tue 7/14
7:00 am-2:05 pm
2 stops10h 05m
$505
OntarioGreenville
ONT - GSP
ONTGSP
Ontario
Tue 9/15
5:00 am-3:14 pm
1 stop7h 14m
Greenville
Thu 9/24
4:25 pm-8:58 pm
1 stop7h 33m
$553
OntarioGreenville
ONT - GSP
ONTGSP
Ontario
Wed 8/5
5:00 am-3:19 pm
1 stop7h 19m
Greenville
Sat 8/8
5:43 pm-10:51 pm
1 stop8h 08m
$577
OntarioGreenville
ONT - GSP
ONTGSP
Ontario
Tue 8/11
1:56 pm-9:36 am
2 stops16h 40m
Greenville
Tue 8/18
10:33 am-8:01 pm
2 stops12h 28m
$583
OntarioGreenville
ONT - GSP
ONTGSP
Ontario
Tue 10/27
5:00 am-9:11 pm
2 stops13h 11m
Greenville
Wed 10/28
2:23 pm-11:06 pm
2 stops11h 43m
$587
OntarioGreenville
ONT - GSP
ONTGSP
Ontario
Sun 7/12
11:55 am-11:25 pm
2 stops8h 30m
Greenville
Wed 7/15
7:00 am-12:40 pm
2 stops8h 40m
$597
OntarioGreenville
ONT - GSP
ONTGSP
Ontario
Mon 6/29
5:00 am-3:19 pm
1 stop7h 19m
Greenville
Fri 7/3
5:43 pm-10:51 pm
1 stop8h 08m
$647
Showing 1-10 of 22 resultsSorted by cheapest first
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 June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Greenville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Greenville flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.
ONT-GSP
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, October is the cheapest month in which you can book a flight from Ontario to Greenville (average of $283). Flying from Ontario to Greenville in February is currently the most expensive (average of $886). 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.
How much does it cost to fly round-trip from Ontario to Greenville?
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 June 12, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andUnited 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.
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
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.
Traveling to a place near Greenville?
Book flights to Greenville if you plan to visit one of these locationsGreer
Simpsonville
Greenwood
Duncan
Seneca
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.
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Alternative routes for Ontario to Greenville
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Complete your trip
Complete your trip to Greenville by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Greenville by cabin class
Find flights from Ontario to Greenville, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Greenville
Explore flights to Greenville departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 12, 2026.
Ontario and Greenville flights
Browse other Ontario and Greenville flight options. Last updated on June 12, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on June 12, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from Ontario to Greenville
Discover the top 4 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 June 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$228 | Average$446 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$273 | Average$616 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$274 | Average$437 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$319 | Average$423 | FlexibilityNo cancel fee | On-time63% |