$197+ Cheap flights from Greenville to Ontario (GSP - ONT)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/17. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — ONT
Dec 11 — Dec 181
Round-trip
1 adult, Economy
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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
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Cheapest flights from Greenville to OntarioExplore 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 November 11, 2026.
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 November 11, 2026.
This United Airlines deal was found by Cheapflights users on 11/6. 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 12/24:18 pm -
1 stop7h 53m
Wed 12/96:00 am -
2 stops11h 59m
Deal found 11/6![United Airlines logo]()
$398
This Delta deal was found by Cheapflights users on 11/10. 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 12/87:00 am -
1 stop7h 07m
Tue 12/1512:20 pm -
1 stop7h 02m
Deal found 11/10![Delta logo]()
$403
This United Airlines deal was found by Cheapflights users on 11/10. 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 12/86:00 am -
2 stops12h 35m
Tue 12/157:00 am -
1 stop6h 53m
Deal found 11/10![United Airlines logo]()
$408
This Southwest deal was found by Cheapflights users on 11/10. 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 12/87:05 am -
2 stops10h 35m
Tue 12/158:40 am -
2 stops9h 10m
Deal found 11/10![Southwest logo]()
$413
This Southwest deal was found by Cheapflights users on 11/6. 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 12/27:05 am -
2 stops10h 25m
Wed 12/910:05 am -
2 stops7h 45m
Deal found 11/6![Southwest logo]()
$418
This Delta deal was found by Cheapflights users on 11/10. 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 12/35:40 am -
1 stop8h 27m
Tue 12/87:05 am -
1 stop8h 15m
Deal found 11/10![Delta logo]()
$423
This Southwest deal was found by Cheapflights users on 11/10. 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 12/77:05 am -
2 stops10h 35m
Wed 12/911:25 am -
1 stop6h 25m
Deal found 11/10![Southwest logo]()
$428
This Delta deal was found by Cheapflights users on 11/7. 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 12/45:40 am -
1 stop8h 27m
Mon 12/711:08 pm -
1 stop9h 05m
Deal found 11/7![Delta logo]()
$433
This Delta deal was found by Cheapflights users on 11/10. 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.
Fri 12/45:40 am -
1 stop8h 27m
Tue 12/812:20 pm -
1 stop7h 02m
Deal found 11/10![Delta logo]()
$438
This Delta deal was found by Cheapflights users on 11/10. 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 12/312:18 pm -
1 stop9h 20m
Mon 12/711:08 pm -
1 stop7h 32m
Deal found 11/10![Delta logo]()
$443
This Southwest deal was found by Cheapflights users on 11/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/47:05 am -
1 stop11h 05m
Mon 12/78:40 am -
2 stops9h 10m
Deal found 11/7![Southwest logo]()
$444
This Southwest deal was found by Cheapflights users on 11/10. 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.
Thu 12/37:05 am -
2 stops10h 35m
Mon 12/711:25 am -
1 stop6h 25m
Deal found 11/10![Southwest logo]()
$448
Best flights from Greenville to OntarioDiscover carefully curated flight deals from Greenville to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 11, 2026.
Discover carefully curated flight deals from Greenville to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 11, 2026.
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Wed 1/65:15 pm -
1 stop8h 00m
Tue 1/126:00 am -
1 stop7h 18m
Deal found 11/10![United Airlines logo]()
$403
This Southwest deal was found by Cheapflights users on 11/6. 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 1/511:20 am -
1 stop6h 50m
Tue 1/128:10 am -
2 stops9h 50m
Deal found 11/6![Southwest logo]()
$413
This Delta deal was found by Cheapflights users on 11/7. 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 12/45:40 am -
1 stop8h 27m
Mon 12/711:08 pm -
1 stop9h 05m
Deal found 11/7![Delta logo]()
$433
This Southwest deal was found by Cheapflights users on 11/6. 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 12/27:05 am -
2 stops10h 25m
Wed 12/910:05 am -
2 stops7h 45m
Deal found 11/6![Southwest logo]()
$418
This Southwest deal was found by Cheapflights users on 11/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/47:05 am -
1 stop11h 05m
Mon 12/78:40 am -
2 stops9h 10m
Deal found 11/7![Southwest logo]()
$444
This Delta deal was found by Cheapflights users on 11/9. 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.
Thu 4/155:05 pm -
1 stop8h 09m
Thu 4/2210:59 pm -
1 stop7h 26m
Deal found 11/9![Delta logo]()
$503
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Wed 12/24:18 pm -
1 stop7h 53m
Tue 12/85:45 am -
2 stops12h 14m
Deal found 11/10![United Airlines logo]()
$538
This Delta deal was found by Cheapflights users on 11/9. 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.
Wed 4/287:45 am -
1 stop6h 42m
Thu 5/612:00 pm -
1 stop6h 21m
Deal found 11/9![Delta logo]()
$503
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Thu 12/36:30 am -
2 stops12h 05m
Tue 12/85:45 am -
2 stops12h 14m
Deal found 11/10![United Airlines logo]()
$563
This Delta deal was found by Cheapflights users on 11/10. 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 12/312:18 pm -
1 stop9h 20m
Sun 12/612:20 pm -
1 stop8h 27m
Deal found 11/10![Delta logo]()
$515
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Fri 12/46:30 am -
2 stops14h 06m
Mon 12/76:40 pm -
2 stops12h 12m
Deal found 11/8![United Airlines logo]()
$573
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Mon 1/114:10 pm -
1 stop7h 50m
Fri 1/156:37 pm -
2 stops12h 24m
Deal found 11/10![United Airlines logo]()
$593
Last-minute flights from Greenville to OntarioDiscover last-minute flight deals from Greenville to Ontario. Data last updated November 11, 2026 and is based on user searches.
Discover last-minute flight deals from Greenville to Ontario. Data last updated November 11, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 11/6. 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 12/24:18 pm -
1 stop7h 53m
Wed 12/96:00 am -
2 stops11h 59m
Deal found 11/6![United Airlines logo]()
$398
This Southwest deal was found by Cheapflights users on 11/6. 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 12/27:05 am -
2 stops10h 25m
Wed 12/910:05 am -
2 stops7h 45m
Deal found 11/6![Southwest logo]()
$418
This Delta deal was found by Cheapflights users on 11/10. 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 12/35:40 am -
1 stop8h 27m
Tue 12/87:05 am -
1 stop8h 15m
Deal found 11/10![Delta logo]()
$423
This Delta deal was found by Cheapflights users on 11/10. 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 12/312:18 pm -
1 stop9h 20m
Mon 12/711:08 pm -
1 stop7h 32m
Deal found 11/10![Delta logo]()
$443
This Southwest deal was found by Cheapflights users on 11/10. 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.
Thu 12/37:05 am -
2 stops10h 35m
Mon 12/711:25 am -
1 stop6h 25m
Deal found 11/10![Southwest logo]()
$448
This Delta deal was found by Cheapflights users on 11/7. 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 12/45:40 am -
1 stop8h 27m
Mon 12/711:08 pm -
1 stop9h 05m
Deal found 11/7![Delta logo]()
$433
This Delta deal was found by Cheapflights users on 11/10. 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.
Fri 12/45:40 am -
1 stop8h 27m
Tue 12/812:20 pm -
1 stop7h 02m
Deal found 11/10![Delta logo]()
$438
This Southwest deal was found by Cheapflights users on 11/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/47:05 am -
1 stop11h 05m
Mon 12/78:40 am -
2 stops9h 10m
Deal found 11/7![Southwest logo]()
$444
This Southwest deal was found by Cheapflights users on 11/10. 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 12/77:05 am -
2 stops10h 35m
Wed 12/911:25 am -
1 stop6h 25m
Deal found 11/10![Southwest logo]()
$428
This Delta deal was found by Cheapflights users on 11/10. 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 12/87:00 am -
1 stop7h 07m
Tue 12/1512:20 pm -
1 stop7h 02m
Deal found 11/10![Delta logo]()
$403
This United Airlines deal was found by Cheapflights users on 11/10. 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 12/86:00 am -
2 stops12h 35m
Tue 12/157:00 am -
1 stop6h 53m
Deal found 11/10![United Airlines logo]()
$408
One-way flights from Greenville to OntarioSearch for one-way flight options from Greenville to Ontario. Find affordable one-way fares based on user searches. Data last updated November 11, 2026.
Search for one-way flight options from Greenville to Ontario. Find affordable one-way fares based on user searches. Data last updated November 11, 2026.
This Delta deal was found by Cheapflights users on 11/9. 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.
Wed 2/175:37 am -
1 stop9h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Delta logo]()
$197
This Delta deal was found by Cheapflights users on 11/9. 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.
Thu 2/185:30 pm -
1 stop7h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Delta logo]()
$212
This Delta deal was found by Cheapflights users on 11/9. 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.
Fri 2/195:37 am -
1 stop9h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Delta logo]()
$222
This American Airlines deal was found by Cheapflights users on 11/9. 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.
Wed 2/175:12 pm -
1 stop7h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![American Airlines logo]()
$262
This American Airlines deal was found by Cheapflights users on 11/9. 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.
Thu 2/182:23 pm -
1 stop7h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![American Airlines logo]()
$277
This American Airlines deal was found by Cheapflights users on 11/9. 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 2/192:23 pm -
1 stop7h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![American Airlines logo]()
$287
This Delta deal was found by Cheapflights users on 11/10. 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.
Fri 11/275:40 am -
1 stop8h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![Delta logo]()
$324
This Delta deal was found by Cheapflights users on 11/8. 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.
Sat 1/27:41 pm -
1 stop6h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Delta logo]()
$388
This United Airlines deal was found by Cheapflights users on 11/7. 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 12/14:18 pm -
1 stop7h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![United Airlines logo]()
$389
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Fri 11/279:23 am -
2 stops13h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![United Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 11/6. 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 12/104:18 pm -
2 stops20h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![United Airlines logo]()
$436
This United Airlines deal was found by Cheapflights users on 11/9. 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 2/187:00 am -
2 stops17h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![United Airlines logo]()
$474
Find flight deals from Greenville to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Greenville (GSP) to Ontario (ONT). 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 November 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $393 (Delta) |
One-way from | $197 (Delta) |
Popular in | April |
Cheapest in | January |
Average price | $617 |
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 7,457,451 searches. Data last updated November 11, 2026.
Use the filters below to find and compare flights from Greenville to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Thu 2/18
5:30 pm-9:44 pm
1 stop7h 14m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$212
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Wed 2/17
5:12 pm-10:06 pm
1 stop7h 54m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$262
Quickest round-trip
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Sat 1/2
7:41 pm-11:40 pm
1 stop6h 59m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$388
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Wed 1/6
5:15 pm-10:15 pm
1 stop8h 00m
Ontario
Tue 1/12
6:00 am-4:18 pm
1 stop7h 18m
$403
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Tue 1/5
11:20 am-3:10 pm
1 stop6h 50m
Ontario
Tue 1/12
8:10 am-9:00 pm
2 stops9h 50m
$413
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Wed 12/2
7:05 am-2:30 pm
2 stops10h 25m
Ontario
Wed 12/9
10:05 am-8:50 pm
2 stops7h 45m
$418
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Fri 12/4
5:40 am-11:07 am
1 stop8h 27m
Ontario
Mon 12/7
11:08 pm-11:13 am
1 stop9h 05m
$433
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Thu 12/10
4:18 pm-9:38 am
2 stops20h 20m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$436
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Fri 12/4
7:05 am-3:10 pm
1 stop11h 05m
Ontario
Mon 12/7
8:40 am-8:50 pm
2 stops9h 10m
$444
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Thu 2/18
7:00 am-9:17 pm
2 stops17h 17m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$474
Showing 1-10 of 19 resultsSorted by cheapest first
Compare providers for flights from Greenville to Ontario
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 Greenville to Ontario in November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Greenville-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Greenville-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Greenville-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Greenville-Ontario 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 Greenville-Ontario 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 Greenville to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Greenville with our price prediction graph.
GSP-ONT
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
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 November 11, 2026.
Peruse reviews from past customers who have flown with Delta and American Airlines from Greenville to Ontario 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.
Entertainment
7.8
Food
7.2
Comfort
7.8
Boarding
8.1
Overall
7.8
Crew
8.5
Reviews
1 / 20
8.0
ExcellentMatthew,Oct 2025
GSP - ATL
Entertainment
7.8
Food
7.2
Comfort
7.8
Boarding
8.1
Overall
7.8
Crew
8.5
Reviews
1 / 20
8.0
ExcellentMatthew,Oct 2025
GSP - ATL
Entertainment
7.8
Food
7.2
Comfort
7.8
Boarding
8.1
Overall
7.8
Crew
8.5
Reviews
1 / 20
8.0
ExcellentMatthew,Oct 2025
GSP - ATL
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.
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Alternative routes for Greenville to Ontario
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Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
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Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on November 11, 2026.
Greenville and Ontario flights
Browse other Greenville and Ontario flight options. Last updated on November 11, 2026.
Other flights from Greenville
Browse through other flights departing from Greenville. Flights are based on user searches made on Cheapflights and were last updated on November 11, 2026.
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Top 2 airlines flying from Greenville to Ontario
Discover the top 2 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 7,457,451 searches. Data last updated November 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$367 | Average$446 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$368 | Average$494 | FlexibilityNo cancel fee | On-time71% |