$185+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — ONT
Sep 25 — Oct 21
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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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 August 26, 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 August 26, 2026.
This Delta deal was found by Cheapflights users on 8/22. 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 12/25:40 am -
1 stop8h 28m
Mon 12/1412:20 pm -
1 stop8h 27m
Deal found 8/22![Delta logo]()
$369
This United Airlines deal was found by Cheapflights users on 8/22. 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 10/3110:42 am -
2 stops12h 33m
Sat 11/75:00 am -
1 stop7h 03m
Deal found 8/22![United Airlines logo]()
$374
This Delta deal was found by Cheapflights users on 8/21. 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 10/25:45 am -
1 stop8h 24m
Mon 10/510:00 pm -
1 stop8h 23m
Deal found 8/21![Delta logo]()
$379
This Delta deal was found by Cheapflights users on 8/22. 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 12/42:07 pm -
1 stop7h 32m
Fri 12/1111:08 pm -
1 stop8h 08m
Deal found 8/22![Delta logo]()
$389
This American Airlines deal was found by Cheapflights users on 8/22. 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 10/305:25 pm -
1 stop9h 27m
Sat 11/76:30 am -
2 stops12h 28m
Deal found 8/22![American Airlines logo]()
$392
This American Airlines deal was found by Cheapflights users on 8/22. 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 10/318:59 am -
2 stops12h 44m
Sat 11/76:30 am -
2 stops12h 28m
Deal found 8/22![American Airlines logo]()
$395
This Southwest deal was found by Cheapflights users on 8/21. 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 12/296:45 am -
2 stops10h 10m
Wed 1/67:50 am -
2 stops10h 10m
Deal found 8/21![Southwest logo]()
$421
This Delta deal was found by Cheapflights users on 8/23. 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 10/115:40 am -
1 stop8h 26m
Mon 10/1911:08 pm -
1 stop7h 15m
Deal found 8/23![Delta logo]()
$423
This Delta deal was found by Cheapflights users on 8/23. 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
Tue 10/207:07 am -
1 stop8h 02m
Deal found 8/23![Delta logo]()
$424
This Southwest deal was found by Cheapflights users on 8/21. 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 10/287:00 am -
2 stops10h 45m
Sun 11/19:00 am -
2 stops8h 10m
Deal found 8/21![Southwest logo]()
$433
This United Airlines deal was found by Cheapflights users on 8/22. 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
Sun 10/115:00 am -
1 stop7h 08m
Deal found 8/22![United Airlines logo]()
$443
This United Airlines deal was found by Cheapflights users on 8/24. 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 10/24:25 pm -
1 stop7h 33m
Sat 10/106:00 am -
2 stops11h 58m
Deal found 8/24![United Airlines logo]()
$445
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 August 26, 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 August 26, 2026.
This Delta deal was found by Cheapflights users on 8/22. 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 28m
Thu 12/1712:20 pm -
1 stop7h 02m
Deal found 8/22![Delta logo]()
$379
This United Airlines deal was found by Cheapflights users on 8/21. 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 9/156:10 pm -
1 stop7h 49m
Tue 9/225:00 am -
1 stop7h 14m
Deal found 8/21![United Airlines logo]()
$479
This Southwest deal was found by Cheapflights users on 8/24. 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 1/17:05 am -
2 stops10h 35m
Fri 1/87:50 am -
2 stops10h 10m
Deal found 8/24![Southwest logo]()
$487
This Delta deal was found by Cheapflights users on 8/24. 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 1/43:42 pm -
1 stop9h 32m
Fri 1/157:00 am -
1 stop6h 09m
Deal found 8/24![Delta logo]()
$433
This United Airlines deal was found by Cheapflights users on 8/22. 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 12/56:30 am -
2 stops9h 04m
Mon 12/145:00 am -
1 stop7h 18m
Deal found 8/22![United Airlines logo]()
$484
This Delta deal was found by Cheapflights users on 8/25. 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 10/147:00 am -
1 stop7h 06m
Mon 10/196:00 am -
2 stops24h 23m
Deal found 8/25![Delta logo]()
$492
This United Airlines deal was found by Cheapflights users on 8/25. 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 11/106:20 am -
2 stops14h 41m
Wed 11/115:00 am -
1 stop7h 03m
Deal found 8/25![United Airlines logo]()
$516
This Delta deal was found by Cheapflights users on 8/25. 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 10/127:00 am -
1 stop17h 54m
Tue 10/2012:16 pm -
1 stop7h 35m
Deal found 8/25![Delta logo]()
$523
This United Airlines deal was found by Cheapflights users on 8/21. 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 9/156:30 am -
2 stops10h 31m
Mon 9/216:08 am -
2 stops24h 27m
Deal found 8/21![United Airlines logo]()
$552
This Delta deal was found by Cheapflights users on 8/25. 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 10/117:00 am -
2 stops19h 55m
Tue 10/2012:16 pm -
1 stop7h 35m
Deal found 8/25![Delta logo]()
$528
Last-minute flights from Greenville to OntarioDiscover last-minute flight deals from Greenville to Ontario. Data last updated August 26, 2026 and is based on user searches.
Discover last-minute flight deals from Greenville to Ontario. Data last updated August 26, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 8/24. 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 9/56:00 am -
1 stop7h 42m
Mon 9/77:05 am -
1 stop6h 10m
Deal found 8/24![Delta logo]()
$483
This Delta deal was found by Cheapflights users on 8/24. 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 9/115:45 am -
1 stop8h 20m
Mon 9/1410:00 pm -
1 stop8h 25m
Deal found 8/24![Delta logo]()
$369
This American Airlines deal was found by Cheapflights users on 8/25. 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 9/118:01 am -
1 stop8h 24m
Mon 9/148:25 am -
2 stops11h 05m
Deal found 8/25![American Airlines logo]()
$488
This United Airlines deal was found by Cheapflights users on 8/21. 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 9/156:10 pm -
1 stop7h 49m
Tue 9/225:00 am -
1 stop7h 14m
Deal found 8/21![United Airlines logo]()
$479
This American Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/155:24 pm -
1 stop8h 13m
Thu 9/1712:37 pm -
1 stop6h 34m
Deal found 8/21![American Airlines logo]()
$504
This United Airlines deal was found by Cheapflights users on 8/21. 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 9/156:10 pm -
1 stop7h 49m
Mon 9/216:08 am -
2 stops32h 06m
Deal found 8/21![United Airlines logo]()
$546
This Southwest deal was found by Cheapflights users on 8/24. 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 9/181:05 pm -
2 stops9h 20m
Sun 9/275:35 am -
2 stops14h 10m
Deal found 8/24![Southwest logo]()
$543
This Delta deal was found by Cheapflights users on 8/24. 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 9/246:25 pm -
1 stop6h 59m
Wed 9/3012:19 pm -
1 stop7h 36m
Deal found 8/24![Delta logo]()
$564
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 August 26, 2026.
Search for one-way flight options from Greenville to Ontario. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.
This Delta deal was found by Cheapflights users on 8/24. 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 9/262:00 pm -
1 stop7h 41m
Deal found 8/24![Delta logo]()
$185
This American Airlines deal was found by Cheapflights users on 8/23. 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 10/35:24 pm -
1 stop8h 13m
Deal found 8/23![American Airlines logo]()
$187
This Delta deal was found by Cheapflights users on 8/24. 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 9/256:25 pm -
1 stop6h 59m
Deal found 8/24![Delta logo]()
$195
This Delta deal was found by Cheapflights users on 8/25. 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 10/117:00 am -
1 stop7h 06m
Deal found 8/25![Delta logo]()
$239
This United Airlines deal was found by Cheapflights users on 8/25. 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 9/94:19 pm -
1 stop7h 34m
Deal found 8/25![United Airlines logo]()
$240
This United Airlines deal was found by Cheapflights users on 8/24. 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 9/285:46 pm -
1 stop8h 03m
Deal found 8/24![United Airlines logo]()
$272
This United Airlines deal was found by Cheapflights users on 8/24. 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 9/255:46 pm -
2 stops32h 13m
Deal found 8/24![United Airlines logo]()
$329
This United Airlines deal was found by Cheapflights users on 8/24. 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 10/15:46 pm -
2 stops21h 32m
Deal found 8/24![United Airlines logo]()
$330
This Alaska Airlines deal was found by Cheapflights users on 8/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:01 am -
2 stops14h 59m
Deal found 8/22![Alaska Airlines logo]()
$334
This United Airlines deal was found by Cheapflights users on 8/22. 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 9/2610:45 am -
2 stops13h 13m
Deal found 8/22![United Airlines logo]()
$373
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 August 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $369 (Delta) |
One-way from | $185 (Delta) |
Popular in | April |
Cheapest in | January |
Average price | $466 |
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 August 26, 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
Fri 12/4
5:40 am-11:08 am
1 stop8h 28m
Ontario
Thu 12/17
12:20 pm-10:22 pm
1 stop7h 02m
$379
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Mon 1/4
3:42 pm-10:14 pm
1 stop9h 32m
Ontario
Fri 1/15
7:00 am-4:09 pm
1 stop6h 09m
$433
Quickest round-trip
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Tue 9/15
6:10 pm-10:59 pm
1 stop7h 49m
Ontario
Tue 9/22
5:00 am-3:14 pm
1 stop7h 14m
$479
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Sat 12/5
6:30 am-12:34 pm
2 stops9h 04m
Ontario
Mon 12/14
5:00 am-3:18 pm
1 stop7h 18m
$484
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Fri 1/1
7:05 am-2:40 pm
2 stops10h 35m
Ontario
Fri 1/8
7:50 am-9:00 pm
2 stops10h 10m
$487
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Wed 10/14
7:00 am-11:06 am
1 stop7h 06m
Ontario
Mon 10/19
6:00 am-9:23 am
2 stops24h 23m
$492
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Tue 11/10
6:20 am-6:01 pm
2 stops14h 41m
Ontario
Wed 11/11
5:00 am-3:03 pm
1 stop7h 03m
$516
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Mon 10/12
7:00 am-9:54 pm
1 stop17h 54m
Ontario
Tue 10/20
12:16 pm-10:51 pm
1 stop7h 35m
$523
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Sun 10/11
7:00 am-11:55 pm
2 stops19h 55m
Ontario
Tue 10/20
12:16 pm-10:51 pm
1 stop7h 35m
$528
GreenvilleOntario
GSP Greenville - ONT Ontario
GSPONT
Greenville
Tue 9/15
6:30 am-2:01 pm
2 stops10h 31m
Ontario
Mon 9/21
6:08 am-9:35 am
2 stops24h 27m
$552
Showing 1-10 of 21 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 August.
| 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 August 26, 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
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentMatthew,Oct 2025
GSP - ATL
Overall
7.8
Crew
8.5
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentMatthew,Oct 2025
GSP - ATL
Overall
7.8
Crew
8.5
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
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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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 August 26, 2026.
Greenville and Ontario flights
Browse other Greenville and Ontario flight options. Last updated on August 26, 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 August 26, 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 August 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$351 | Average$446 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$368 | Average$480 | FlexibilityNo cancel fee | On-time71% |