$208+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — ONT
Oct 17 — Oct 241
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Greenville to Ontario 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 Greenville to Ontario
Cheapest
Best
Last-minute
One-way
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 September 17, 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 September 17, 2026.
This American Airlines deal was found by Cheapflights users on 9/16. 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 10/245:25 pm -
1 stop6h 56m
Sat 10/3111:45 pm -
1 stop8h 42m
Deal found 9/16![American Airlines logo]()
$305
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/244:25 pm -
1 stop7h 33m
Sat 10/316:00 am -
2 stops11h 58m
Deal found 9/16![United Airlines logo]()
$310
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/175:25 pm -
1 stop6h 46m
Sat 10/247:00 am -
1 stop6h 35m
Deal found 9/15![American Airlines logo]()
$348
This Delta deal was found by Cheapflights users on 9/14. 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 12/55:40 am -
1 stop8h 28m
Mon 12/1412:20 pm -
1 stop7h 02m
Deal found 9/14![Delta logo]()
$349
This Delta deal was found by Cheapflights users on 9/14. 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 12/412:18 pm -
1 stop9h 21m
Mon 12/1412:20 pm -
1 stop7h 02m
Deal found 9/14![Delta logo]()
$370
This Southwest deal was found by Cheapflights users on 9/16. 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 10/236:25 am -
2 stops11h 00m
Mon 10/2611:55 pm -
2 stops9h 45m
Deal found 9/16![Southwest logo]()
$381
This Delta deal was found by Cheapflights users on 9/16. 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 10/233:39 pm -
1 stop9h 15m
Mon 10/2611:15 pm -
1 stop7h 08m
Deal found 9/16![Delta logo]()
$391
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/175:12 pm -
1 stop7h 28m
Wed 11/185:00 am -
1 stop7h 03m
Deal found 9/15![United Airlines logo]()
$415
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/245:29 pm -
1 stop8h 12m
Mon 1/46:27 pm -
2 stops12h 24m
Deal found 9/15![United Airlines logo]()
$418
This Delta deal was found by Cheapflights users on 9/14. 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 12/55:40 am -
1 stop8h 28m
Sun 12/1311:08 pm -
1 stop7h 32m
Deal found 9/14![Delta logo]()
$423
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 September 17, 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 September 17, 2026.
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/242:16 pm -
2 stops9h 42m
Sat 10/316:00 am -
2 stops11h 58m
Deal found 9/16![United Airlines logo]()
$358
This Delta deal was found by Cheapflights users on 9/14. 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 10/316:00 am -
1 stop8h 06m
Fri 11/612:16 pm -
1 stop7h 35m
Deal found 9/14![Delta logo]()
$477
This United Airlines deal was found by Cheapflights users on 9/16. 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 11/175:12 pm -
1 stop7h 28m
Wed 11/185:00 am -
1 stop7h 03m
Deal found 9/16![United Airlines logo]()
$415
This Delta deal was found by Cheapflights users on 9/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/135:40 am -
1 stop8h 26m
Sat 10/177:07 am -
1 stop8h 02m
Deal found 9/13![Delta logo]()
$487
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/34:25 pm -
1 stop7h 33m
Tue 10/66:00 am -
2 stops14h 13m
Deal found 9/16![United Airlines logo]()
$466
This Delta deal was found by Cheapflights users on 9/12. 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.
Wed 10/145:40 am -
1 stop8h 26m
Sat 10/177:07 am -
1 stop8h 02m
Deal found 9/12![Delta logo]()
$518
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/105:46 pm -
1 stop8h 03m
Wed 10/145:00 am -
1 stop7h 08m
Deal found 9/16![United Airlines logo]()
$529
This Delta deal was found by Cheapflights users on 9/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:00 am -
1 stop8h 06m
Tue 11/312:16 pm -
1 stop7h 35m
Deal found 9/13![Delta logo]()
$541
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/44:29 pm -
1 stop7h 22m
Fri 11/65:00 am -
1 stop7h 03m
Deal found 9/15![United Airlines logo]()
$536
Last-minute flights from Greenville to OntarioDiscover last-minute flight deals from Greenville to Ontario. Data last updated September 17, 2026 and is based on user searches.
Discover last-minute flight deals from Greenville to Ontario. Data last updated September 17, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/175:25 pm -
1 stop6h 46m
Sat 10/247:00 am -
1 stop6h 35m
Deal found 9/15![American Airlines logo]()
$348
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/214:25 pm -
1 stop7h 33m
Sat 10/245:00 am -
1 stop7h 08m
Deal found 9/15![United Airlines logo]()
$415
This Southwest deal was found by Cheapflights users on 9/16. 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 10/236:25 am -
2 stops11h 00m
Mon 10/2611:55 pm -
2 stops9h 45m
Deal found 9/16![Southwest logo]()
$381
This Delta deal was found by Cheapflights users on 9/16. 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 10/233:39 pm -
1 stop9h 15m
Mon 10/2611:15 pm -
1 stop7h 08m
Deal found 9/16![Delta logo]()
$391
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/234:25 pm -
1 stop7h 33m
Wed 10/285:00 am -
1 stop7h 03m
Deal found 9/15![United Airlines logo]()
$458
This Delta deal was found by Cheapflights users on 9/16. 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 10/237:00 am -
1 stop7h 06m
Sun 10/2511:15 pm -
1 stop7h 08m
Deal found 9/16![Delta logo]()
$465
This American Airlines deal was found by Cheapflights users on 9/16. 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 10/245:25 pm -
1 stop6h 56m
Sat 10/3111:45 pm -
1 stop8h 42m
Deal found 9/16![American Airlines logo]()
$305
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/244:25 pm -
1 stop7h 33m
Sat 10/316:00 am -
2 stops11h 58m
Deal found 9/16![United Airlines logo]()
$310
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/284:29 pm -
1 stop7h 22m
Sat 10/315:00 am -
2 stops12h 58m
Deal found 9/15![United Airlines logo]()
$463
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 September 17, 2026.
Search for one-way flight options from Greenville to Ontario. Find affordable one-way fares based on user searches. Data last updated September 17, 2026.
This American Airlines deal was found by Cheapflights users on 9/16. 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 10/65:25 pm -
1 stop9h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![American Airlines logo]()
$208
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/66:20 am -
2 stops12h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![United Airlines logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/512:11 pm -
3 stops49h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Multiple Airlines logo]()
$218
This Delta deal was found by Cheapflights users on 9/14. 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 3/125:40 am -
1 stop8h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Delta logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/612:29 pm -
3 stops23h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Multiple Airlines logo]()
$251
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Sat 10/38:24 pm -
3 stops48h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Multiple Airlines logo]()
$257
This American Airlines deal was found by Cheapflights users on 9/16. 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 10/57:45 pm -
1 stop7h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![American Airlines logo]()
$279
This American Airlines deal was found by Cheapflights users on 9/12. 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.
Sat 10/38:01 am -
1 stop8h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![American Airlines logo]()
$284
This American Airlines deal was found by Cheapflights users on 9/14. 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 3/155:23 pm -
1 stop7h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![American Airlines logo]()
$294
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Fri 10/28:32 pm -
2 stops16h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Multiple Airlines logo]()
$303
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 September 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $348 (American Airlines) |
One-way from | $208 (American Airlines) |
Popular in | April |
Cheapest in | January |
Average price | $507 |
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 September 17, 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
Tue 10/6
6:20 am-3:22 pm
2 stops12h 02m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$213
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Sat 3/13
5:40 am-11:27 am
1 stop8h 47m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$249
Quickest round-trip
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Tue 3/16
6:45 am-11:27 am
1 stop7h 42m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$249
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Sat 10/3
8:01 am-1:25 pm
1 stop8h 24m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$284
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Fri 10/16
5:15 pm-9:59 pm
1 stop7h 44m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$304
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Sat 10/3
6:00 am-11:07 am
1 stop8h 07m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$309
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Wed 9/30
5:45 am-11:09 am
1 stop8h 24m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$309
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Thu 10/1
4:02 pm-11:47 pm
2 stops34h 45m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$352
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Sat 10/24
2:16 pm-8:58 pm
2 stops9h 42m
Ontario
Sat 10/31
6:00 am-8:58 pm
2 stops11h 58m
$358
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Tue 11/17
5:12 pm-9:40 pm
1 stop7h 28m
Ontario
Wed 11/18
5:00 am-3:03 pm
1 stop7h 03m
$415
Showing 1-10 of 17 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 September.
| 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 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.
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 September 17, 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.
Food
7.2
Crew
8.5
Entertainment
7.8
Boarding
8.1
Overall
7.8
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentMatthew,Oct 2025
GSP - ATL
Food
7.2
Crew
8.5
Entertainment
7.8
Boarding
8.1
Overall
7.8
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentMatthew,Oct 2025
GSP - ATL
Food
7.2
Crew
8.5
Entertainment
7.8
Boarding
8.1
Overall
7.8
Comfort
7.8
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.
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.
Alternative routes
Complete your trip
Flights by cabin class
Ontario flight routes
Other flight options
Other flights from Greenville
Popular flights
Alternative routes for Greenville to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Greenville to Ontario by cabin class
Find flights from Greenville to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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 September 17, 2026.
Greenville and Ontario flights
Browse other Greenville and Ontario flight options. Last updated on September 17, 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 September 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 September 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$351 | Average$446 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$368 | Average$494 | FlexibilityNo cancel fee | On-time71% |