$234+ Cheap flights from Greenville to Ontario (GSP - ONT)
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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — ONT
Aug 5 — Aug 121
Round-trip
1 adult, Economy
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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
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Best
Last-minute
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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 July 6, 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 July 6, 2026.
This American Airlines deal was found by Cheapflights users on 7/2. 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 8/125:28 pm
GSP
- ONT
1 stop8h 31m
American Airlines
Wed 8/196:00 am
ONT
- GSP
1 stop7h 38m
American Airlines
Deal found 7/2![American Airlines logo]()
$363
This Southwest deal was found by Cheapflights users on 7/2. 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 8/127:00 am
GSP
- ONT
2 stops8h 30m
Southwest
Wed 8/197:25 am
ONT
- GSP
1 stop6h 20m
Southwest
Deal found 7/2![Southwest logo]()
$368
This American Airlines deal was found by Cheapflights users on 7/1. 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 8/185:28 pm
GSP
- ONT
1 stop8h 31m
American Airlines
Sat 8/296:15 am
ONT
- GSP
2 stops12h 35m
American Airlines
Deal found 7/1![American Airlines logo]()
$381
This Delta deal was found by Cheapflights users on 7/1. 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 10/103:42 pm
GSP
- ONT
1 stop6h 50m
Delta
Mon 10/1912:18 pm
ONT
- GSP
1 stop6h 03m
Delta
Deal found 7/1![Delta logo]()
$391
This Delta deal was found by Cheapflights users on 7/1. 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 10/103:42 pm
GSP
- ONT
1 stop6h 50m
Delta
Fri 10/1611:15 pm
ONT
- GSP
1 stop7h 10m
Delta
Deal found 7/1![Delta logo]()
$415
This Delta deal was found by Cheapflights users on 7/1. 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 10/123:42 pm
GSP
- ONT
1 stop9h 19m
Delta
Mon 10/1911:15 pm
ONT
- GSP
1 stop8h 43m
Delta
Deal found 7/1![Delta logo]()
$469
This United Airlines deal was found by Cheapflights users on 7/5. 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 9/296:20 am
GSP
- ONT
2 stops11h 51m
United Airlines
Tue 10/66:00 am
ONT
- GSP
1 stop6h 49m
United Airlines
Deal found 7/5![United Airlines logo]()
$472
This United Airlines deal was found by Cheapflights users on 7/2. 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 11/174:29 pm
GSP
- ONT
1 stop7h 27m
United Airlines
Wed 11/185:00 am
ONT
- GSP
1 stop6h 48m
United Airlines
Deal found 7/2![United Airlines logo]()
$473
This Southwest deal was found by Cheapflights users on 7/5. 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 9/287:00 am
GSP
- ONT
2 stops8h 00m
Southwest
Thu 10/811:00 am
ONT
- GSP
2 stops8h 45m
Southwest
Deal found 7/5![Southwest logo]()
$477
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 July 6, 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 July 6, 2026.
This United Airlines deal was found by Cheapflights users on 7/1. 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 8/1810:25 am
GSP
- ONT
2 stops12h 36m
United Airlines
Sat 8/297:00 am
ONT
- GSP
1 stop7h 02m
United Airlines
Deal found 7/1![United Airlines logo]()
$368
This Southwest deal was found by Cheapflights users on 7/1. 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 8/187:00 am
GSP
- ONT
2 stops10h 05m
Southwest
Sat 8/297:05 am
ONT
- GSP
2 stops7h 25m
Southwest
Deal found 7/1![Southwest logo]()
$373
This American Airlines deal was found by Cheapflights users on 7/3. 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 1/12:31 pm
GSP
- ONT
1 stop9h 27m
American Airlines
Fri 1/811:59 pm
ONT
- GSP
2 stops12h 20m
American Airlines
Deal found 7/3![American Airlines logo]()
$533
This Delta deal was found by Cheapflights users on 7/2. 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 7/165:44 am
GSP
- ONT
1 stop7h 54m
Delta
Sun 7/2610:00 pm
ONT
- GSP
1 stop8h 13m
Delta
Deal found 7/2![Delta logo]()
$562
This Southwest deal was found by Cheapflights users on 7/2. 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.
Sat 8/1511:05 am
GSP
- ONT
2 stops9h 55m
Southwest
Sat 8/227:05 am
ONT
- GSP
2 stops7h 25m
Southwest
Deal found 7/2![Southwest logo]()
$373
This United Airlines deal was found by Cheapflights users on 7/2. 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 11/1710:33 am
GSP
- ONT
2 stops13h 23m
United Airlines
Wed 11/186:00 am
ONT
- GSP
2 stops13h 46m
United Airlines
Deal found 7/2![United Airlines logo]()
$483
This Southwest deal was found by Cheapflights users on 7/5. 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 9/287:00 am
GSP
- ONT
2 stops8h 00m
Southwest
Thu 10/811:00 am
ONT
- GSP
2 stops8h 45m
Southwest
Deal found 7/5![Southwest logo]()
$477
This United Airlines deal was found by Cheapflights users on 7/5. 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
GSP
- ONT
1 stop7h 33m
United Airlines
Tue 10/276:00 am
ONT
- GSP
1 stop7h 31m
United Airlines
Deal found 7/5![United Airlines logo]()
$577
Last-minute flights from Greenville to OntarioDiscover last-minute flight deals from Greenville to Ontario. Data last updated July 6, 2026 and is based on user searches.
Discover last-minute flight deals from Greenville to Ontario. Data last updated July 6, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 7/2. 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 7/306:18 pm
GSP
- ONT
1 stop7h 16m
American Airlines
Mon 8/310:10 pm
ONT
- GSP
1 stop9h 02m
American Airlines
Deal found 7/2![American Airlines logo]()
$502
This Southwest deal was found by Cheapflights users on 7/2. 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 7/307:05 am
GSP
- ONT
2 stops8h 05m
Southwest
Mon 8/39:40 pm
ONT
- GSP
1 stop9h 35m
Southwest
Deal found 7/2![Southwest logo]()
$507
This Delta deal was found by Cheapflights users on 7/2. 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 8/115:46 am
GSP
- ONT
1 stop7h 56m
Delta
Fri 8/1410:00 pm
ONT
- GSP
1 stop9h 02m
Delta
Deal found 7/2![Delta logo]()
$415
This American Airlines deal was found by Cheapflights users on 7/2. 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 8/125:28 pm
GSP
- ONT
1 stop8h 31m
American Airlines
Wed 8/196:00 am
ONT
- GSP
1 stop7h 38m
American Airlines
Deal found 7/2![American Airlines logo]()
$363
This Southwest deal was found by Cheapflights users on 7/2. 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 8/127:00 am
GSP
- ONT
2 stops8h 30m
Southwest
Wed 8/197:25 am
ONT
- GSP
1 stop6h 20m
Southwest
Deal found 7/2![Southwest logo]()
$368
This American Airlines deal was found by Cheapflights users on 7/1. 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 8/185:28 pm
GSP
- ONT
1 stop8h 31m
American Airlines
Sat 8/296:15 am
ONT
- GSP
2 stops12h 35m
American Airlines
Deal found 7/1![American Airlines logo]()
$381
This Delta deal was found by Cheapflights users on 7/1. 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 8/215:20 pm
GSP
- ONT
1 stop7h 32m
Delta
Sun 8/2310:00 pm
ONT
- GSP
1 stop8h 18m
Delta
Deal found 7/1![Delta logo]()
$533
This United Airlines deal was found by Cheapflights users on 7/3. 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 8/255:43 pm
GSP
- ONT
1 stop7h 52m
United Airlines
Sat 8/297:00 am
ONT
- GSP
1 stop7h 02m
United Airlines
Deal found 7/3![United Airlines logo]()
$529
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 July 6, 2026.
Search for one-way flight options from Greenville to Ontario. Find affordable one-way fares based on user searches. Data last updated July 6, 2026.
This Delta deal was found by Cheapflights users on 7/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/103:42 pm
GSP
- ONT
1 stop6h 50m
Delta
Deal found 7/6![Delta logo]()
$234
This Southwest deal was found by Cheapflights users on 7/6. 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.
Sat 10/1011:20 am
GSP
- ONT
2 stops9h 35m
Southwest
Deal found 7/6![Southwest logo]()
$239
This Delta deal was found by Cheapflights users on 7/2. 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 7/225:16 pm
GSP
- ONT
1 stop7h 34m
Delta
Deal found 7/2![Delta logo]()
$240
This United Airlines deal was found by Cheapflights users on 7/2. 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 8/135:43 pm
GSP
- ONT
1 stop7h 52m
United Airlines
Deal found 7/2![United Airlines logo]()
$265
This Delta deal was found by Cheapflights users on 7/3. 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 7/275:16 pm
GSP
- ONT
1 stop7h 34m
Delta
Deal found 7/3![Delta logo]()
$269
This Kiwi.com deal was found by Cheapflights users on 7/5. 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 7/246:19 pm
GSP
- ONT
2 stops32h 31m
Multiple Airlines
Deal found 7/5![Multiple Airlines logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 7/5. 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.
Sun 9/273:39 pm
GSP
- ONT
3 stops49h 18m
Multiple Airlines
Deal found 7/5![Multiple Airlines logo]()
$281
This United Airlines deal was found by Cheapflights users on 7/6. 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.
Mon 8/314:33 pm
GSP
- ONT
1 stop7h 20m
United Airlines
Deal found 7/6![United Airlines logo]()
$289
This Delta deal was found by Cheapflights users on 7/2. 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 7/187:15 am
GSP
- ONT
1 stop6h 23m
Delta
Deal found 7/2![Delta logo]()
$294
This Southwest deal was found by Cheapflights users on 7/5. 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 7/2312:55 pm
GSP
- ONT
2 stops11h 10m
Southwest
Deal found 7/5![Southwest logo]()
$299
This Delta deal was found by Cheapflights users on 7/3. 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 7/257:15 am
GSP
- ONT
1 stop6h 23m
Delta
Deal found 7/3![Delta logo]()
$300
This United Airlines deal was found by Cheapflights users on 7/6. 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 7/304:15 pm
GSP
- ONT
1 stop7h 27m
United Airlines
Deal found 7/6![United Airlines logo]()
$324
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 July 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $363 (American Airlines) |
One-way from | $234 (Delta) |
Popular in | April |
Cheapest in | January |
Average price | $494 |
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 2,558,603 searches. Data last updated July 6, 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 - ONT
GSPONT
Greenville
Tue 8/18
10:25 am-8:01 pm
2 stops12h 36m
Ontario
Sat 8/29
7:00 am-5:02 pm
1 stop7h 02m
$368
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Tue 8/18
7:00 am-2:05 pm
2 stops10h 05m
Ontario
Sat 8/29
7:05 am-5:30 pm
2 stops7h 25m
$373
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Sat 8/15
11:05 am-6:00 pm
2 stops9h 55m
Ontario
Sat 8/22
7:05 am-5:30 pm
2 stops7h 25m
$373
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Mon 9/28
7:00 am-12:00 pm
2 stops8h 00m
Ontario
Thu 10/8
11:00 am-10:45 pm
2 stops8h 45m
$477
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Tue 11/17
10:33 am-8:56 pm
2 stops13h 23m
Ontario
Wed 11/18
6:00 am-10:46 pm
2 stops13h 46m
$483
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Fri 1/1
2:31 pm-8:58 pm
1 stop9h 27m
Ontario
Fri 1/8
11:59 pm-3:19 pm
2 stops12h 20m
$533
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Thu 7/16
5:44 am-10:38 am
1 stop7h 54m
Ontario
Sun 7/26
10:00 pm-9:13 am
1 stop8h 13m
$562
Quickest round-trip
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Fri 10/23
4:25 pm-8:58 pm
1 stop7h 33m
Ontario
Tue 10/27
6:00 am-4:31 pm
1 stop7h 31m
$577
Cheapest one-way
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Sun 9/27
7:00 am-11:07 am
1 stop7h 07m
$234
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Sat 10/10
3:42 pm-7:32 pm
1 stop6h 50m
$234
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 July.
| 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 July 6, 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.
Overall
7.8
Crew
8.5
Food
7.2
Comfort
7.8
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
8.0
ExcellentMatthew,Oct 2025
GSP - ATL
Overall
7.8
Crew
8.5
Food
7.2
Comfort
7.8
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
8.0
ExcellentMatthew,Oct 2025
GSP - ATL
Overall
7.8
Crew
8.5
Food
7.2
Comfort
7.8
Boarding
8.1
Entertainment
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.
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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.
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 July 6, 2026.
Greenville and Ontario flights
Browse other Greenville and Ontario flight options. Last updated on July 6, 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 July 6, 2026.
Popular flight searches
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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 2,558,603 searches. Data last updated July 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$351 | Average$434 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$368 | Average$480 | FlexibilityNo cancel fee | On-time71% |