$192+ 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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — ONT
Jun 4 — Jun 111
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
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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
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 May 5, 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 May 5, 2026.
This Delta deal was found by Cheapflights users on 5/4. 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 6/25:40 am
GSP
- ONT
1 stop8h 17m
Delta
Sat 6/610:00 pm
ONT
- GSP
1 stop8h 18m
Delta
Deal found 5/4![Delta logo]()
$396
This American Airlines deal was found by Cheapflights users on 5/2. 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 6/45:25 pm
GSP
- ONT
1 stop9h 34m
American Airlines
Tue 6/910:00 pm
ONT
- GSP
1 stop7h 18m
American Airlines
Deal found 5/2![American Airlines logo]()
$421
This United Airlines deal was found by Cheapflights users on 5/3. 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.
Fri 5/294:15 pm
GSP
- ONT
1 stop7h 27m
United Airlines
Sat 5/305:00 am
ONT
- GSP
1 stop7h 19m
United Airlines
Deal found 5/3![United Airlines logo]()
$438
This Delta deal was found by Cheapflights users on 5/3. 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.
Fri 5/295:05 pm
GSP
- ONT
2 stops9h 29m
Delta
Sat 5/3010:00 pm
ONT
- GSP
1 stop8h 04m
Delta
Deal found 5/3![Delta logo]()
$443
This United Airlines deal was found by Cheapflights users on 5/1. 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.
Mon 6/84:15 pm
GSP
- ONT
1 stop7h 31m
United Airlines
Mon 6/156:30 pm
ONT
- GSP
2 stops12h 25m
United Airlines
Deal found 5/1![United Airlines logo]()
$466
This Delta deal was found by Cheapflights users on 5/1. 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 7/175:44 am
GSP
- ONT
1 stop7h 54m
Delta
Tue 7/2811:48 am
ONT
- GSP
1 stop8h 07m
Delta
Deal found 5/1![Delta logo]()
$467
This United Airlines deal was found by Cheapflights users on 4/30. 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 10/61:10 pm
GSP
- ONT
2 stops11h 48m
United Airlines
Sat 10/107:00 am
ONT
- GSP
1 stop7h 00m
United Airlines
Deal found 4/30![United Airlines logo]()
$472
This Delta deal was found by Cheapflights users on 4/30. 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 10/65:05 pm
GSP
- ONT
2 stops9h 43m
Delta
Sat 10/107:00 am
ONT
- GSP
2 stops11h 58m
Delta
Deal found 4/30![Delta logo]()
$477
This Southwest deal was found by Cheapflights users on 5/4. 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 7/271:55 pm
GSP
- ONT
1 stop11h 30m
Southwest
Fri 7/315:15 am
ONT
- GSP
2 stops10h 00m
Southwest
Deal found 5/4![Southwest logo]()
$478
This United Airlines deal was found by Cheapflights users on 4/30. 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 9/110:46 am
GSP
- ONT
1 stop10h 33m
United Airlines
Wed 9/25:00 am
ONT
- GSP
1 stop7h 10m
United Airlines
Deal found 4/30![United Airlines logo]()
$493
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 May 5, 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 May 5, 2026.
This Delta deal was found by Cheapflights users on 5/4. 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 5/295:40 am
GSP
- ONT
1 stop8h 17m
Delta
Sat 5/3010:00 pm
ONT
- GSP
1 stop8h 04m
Delta
Deal found 5/4![Delta logo]()
$438
This Southwest deal was found by Cheapflights users on 5/4. 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 7/277:05 am
GSP
- ONT
2 stops11h 20m
Southwest
Fri 7/315:15 am
ONT
- GSP
2 stops10h 00m
Southwest
Deal found 5/4![Southwest logo]()
$493
This United Airlines deal was found by Cheapflights users on 5/4. 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 9/110:46 am
GSP
- ONT
2 stops12h 18m
United Airlines
Wed 9/25:00 am
ONT
- GSP
1 stop7h 10m
United Airlines
Deal found 5/4![United Airlines logo]()
$498
This Delta deal was found by Cheapflights users on 5/1. 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.
Wed 7/225:16 pm
GSP
- ONT
1 stop7h 34m
Delta
Tue 7/2810:00 pm
ONT
- GSP
1 stop8h 13m
Delta
Deal found 5/1![Delta logo]()
$467
This Delta deal was found by Cheapflights users on 5/1. 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 7/175:44 am
GSP
- ONT
1 stop7h 54m
Delta
Wed 7/2910:00 pm
ONT
- GSP
1 stop8h 13m
Delta
Deal found 5/1![Delta logo]()
$467
This United Airlines deal was found by Cheapflights users on 5/3. 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 7/285:43 pm
GSP
- ONT
1 stop8h 08m
United Airlines
Tue 8/45:00 am
ONT
- GSP
1 stop7h 19m
United Airlines
Deal found 5/3![United Airlines logo]()
$577
This Delta deal was found by Cheapflights users on 5/1. 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.
Tue 7/75:44 am
GSP
- ONT
1 stop7h 54m
Delta
Fri 7/1710:00 pm
ONT
- GSP
1 stop8h 18m
Delta
Deal found 5/1![Delta logo]()
$522
This Delta deal was found by Cheapflights users on 5/4. 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 6/85:44 am
GSP
- ONT
1 stop7h 56m
Delta
Thu 6/1111:50 am
ONT
- GSP
1 stop9h 09m
Delta
Deal found 5/4![Delta logo]()
$523
Last-minute flights from Greenville to OntarioDiscover last-minute flight deals from Greenville to Ontario. Data last updated May 5, 2026 and is based on user searches.
Discover last-minute flight deals from Greenville to Ontario. Data last updated May 5, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 5/2. 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.
Tue 5/191:44 pm
GSP
- ONT
1 stop9h 43m
American Airlines
Sat 5/235:44 am
ONT
- GSP
1 stop7h 51m
American Airlines
Deal found 5/2![American Airlines logo]()
$498
This United Airlines deal was found by Cheapflights users on 5/3. 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.
Fri 5/294:15 pm
GSP
- ONT
1 stop7h 27m
United Airlines
Sat 5/305:00 am
ONT
- GSP
1 stop7h 19m
United Airlines
Deal found 5/3![United Airlines logo]()
$438
This Delta deal was found by Cheapflights users on 5/3. 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.
Fri 5/295:05 pm
GSP
- ONT
2 stops9h 29m
Delta
Sat 5/3010:00 pm
ONT
- GSP
1 stop8h 04m
Delta
Deal found 5/3![Delta logo]()
$443
This Delta deal was found by Cheapflights users on 5/4. 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 6/25:40 am
GSP
- ONT
1 stop8h 17m
Delta
Sat 6/610:00 pm
ONT
- GSP
1 stop8h 18m
Delta
Deal found 5/4![Delta logo]()
$396
This American Airlines deal was found by Cheapflights users on 5/2. 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 6/45:25 pm
GSP
- ONT
1 stop9h 34m
American Airlines
Tue 6/910:00 pm
ONT
- GSP
1 stop7h 18m
American Airlines
Deal found 5/2![American Airlines logo]()
$421
This Southwest deal was found by Cheapflights users on 5/2. 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 6/412:55 pm
GSP
- ONT
1 stop6h 05m
Southwest
Tue 6/95:45 am
ONT
- GSP
2 stops10h 15m
Southwest
Deal found 5/2![Southwest logo]()
$528
This United Airlines deal was found by Cheapflights users on 5/1. 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.
Mon 6/84:15 pm
GSP
- ONT
1 stop7h 31m
United Airlines
Mon 6/156:30 pm
ONT
- GSP
2 stops12h 25m
United Airlines
Deal found 5/1![United Airlines logo]()
$466
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 May 5, 2026.
Search for one-way flight options from Greenville to Ontario. Find affordable one-way fares based on user searches. Data last updated May 5, 2026.
This Delta deal was found by Cheapflights users on 4/30. 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 6/26:45 am
GSP
- ONT
1 stop7h 12m
Delta
Deal found 4/30![Delta logo]()
$192
This American Airlines deal was found by Cheapflights users on 5/3. 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.
Tue 6/24:06 pm
GSP
- ONT
2 stops10h 53m
American Airlines
Deal found 5/3![American Airlines logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/149:33 am
GSP
- ONT
2 stops49h 47m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/18:28 pm
GSP
- ONT
3 stops22h 16m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$200
This Delta deal was found by Cheapflights users on 5/3. 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 6/15:05 pm
GSP
- ONT
1 stop7h 43m
Delta
Deal found 5/3![Delta logo]()
$205
This Delta deal was found by Cheapflights users on 5/4. 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 5/245:40 am
GSP
- ONT
1 stop8h 17m
Delta
Deal found 5/4![Delta logo]()
$234
This Southwest deal was found by Cheapflights users on 5/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:25 am
GSP
- ONT
2 stops11h 00m
Southwest
Deal found 5/3![Southwest logo]()
$235
This Southwest deal was found by Cheapflights users on 5/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/2512:55 pm
GSP
- ONT
2 stops11h 10m
Southwest
Deal found 5/3![Southwest logo]()
$239
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/313:27 pm
GSP
- ONT
3 stops45h 38m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$243
This United Airlines deal was found by Cheapflights users on 5/3. 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.
Wed 5/275:41 pm
GSP
- ONT
1 stop8h 10m
United Airlines
Deal found 5/3![United Airlines logo]()
$247
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 May 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $396 (Delta) |
One-way from | $192 (Delta) |
Popular in | April |
Cheapest in | January |
Average price | $472 |
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 May 5, 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
Fri 5/29
5:40 am-10:57 am
1 stop8h 17m
Ontario
Sat 5/30
10:00 pm-9:04 am
1 stop8h 04m
$438
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Wed 7/22
5:16 pm-9:50 pm
1 stop7h 34m
Ontario
Tue 7/28
10:00 pm-9:13 am
1 stop8h 13m
$467
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Fri 7/17
5:44 am-10:38 am
1 stop7h 54m
Ontario
Wed 7/29
10:00 pm-9:13 am
1 stop8h 13m
$467
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Mon 7/27
7:05 am-3:25 pm
2 stops11h 20m
Ontario
Fri 7/31
5:15 am-6:15 pm
2 stops10h 00m
$493
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Tue 9/1
10:46 am-8:04 pm
2 stops12h 18m
Ontario
Wed 9/2
5:00 am-3:10 pm
1 stop7h 10m
$498
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Tue 7/7
5:44 am-10:38 am
1 stop7h 54m
Ontario
Fri 7/17
10:00 pm-9:18 am
1 stop8h 18m
$522
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Mon 6/8
5:44 am-10:40 am
1 stop7h 56m
Ontario
Thu 6/11
11:50 am-11:59 pm
1 stop9h 09m
$523
Quickest round-trip
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Tue 7/28
5:43 pm-10:51 pm
1 stop8h 08m
Ontario
Tue 8/4
5:00 am-3:19 pm
1 stop7h 19m
$577
Cheapest one-way
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Tue 6/2
6:45 am-10:57 am
1 stop7h 12m
$192
Quickest one-way
GreenvilleOntario
GSP - ONT
GSPONT
Greenville
Mon 6/1
7:54 pm-11:59 pm
1 stop7h 05m
$205
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 May.
| 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.
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 May 5, 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.
Boarding
8.1
Crew
8.5
Entertainment
7.8
Overall
7.9
Comfort
7.9
Food
7.2
Reviews
1 / 20
8.0
ExcellentMatthew,Oct 2025
GSP - ATL
Boarding
8.1
Crew
8.5
Entertainment
7.8
Overall
7.9
Comfort
7.9
Food
7.2
Reviews
1 / 20
8.0
ExcellentMatthew,Oct 2025
GSP - ATL
Boarding
8.1
Crew
8.5
Entertainment
7.8
Overall
7.9
Comfort
7.9
Food
7.2
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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Complete your trip
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Ontario flight routes
Other flight options
Other flights from Greenville
Popular flights
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 May 5, 2026.
Greenville and Ontario flights
Browse other Greenville and Ontario flight options. Last updated on May 5, 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 May 5, 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 2,558,603 searches. Data last updated May 5, 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% |