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Ontario

$159+ Cheap flights from Greenville to Ontario (GSP - ONT)

GSP — ONT
Nov 25 — Dec 21
Wed 11/25
Wed 12/2
1 adult, Economy
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Cheap flight deals from Greenville to Ontario

Cheapest flights from Greenville to Ontario

Fri 11/137:46 pm -
1 stop7h 00m
Wed 11/187:00 am -
1 stop6h 27m
Deal found 10/23$404
Tue 11/105:12 pm -
1 stop7h 28m
Wed 11/115:00 am -
1 stop7h 03m
Deal found 10/21$447
Thu 11/194:29 pm -
1 stop7h 22m
Thu 11/265:00 am -
1 stop7h 03m
Deal found 10/22$468
Sat 11/75:16 pm -
1 stop7h 56m
Wed 11/1112:42 pm -
1 stop6h 16m
Deal found 10/23$477
Sat 11/710:26 am -
2 stops12h 49m
Wed 11/115:00 am -
1 stop7h 03m
Deal found 10/23$482
Wed 11/114:29 pm -
1 stop7h 22m
Tue 11/176:00 am -
1 stop6h 14m
Deal found 10/23$489
Mon 12/74:18 pm -
1 stop7h 53m
Sun 12/135:00 am -
1 stop7h 12m
Deal found 10/22$514
Sat 11/214:29 pm -
1 stop7h 22m
Tue 12/15:00 am -
1 stop7h 12m
Deal found 10/26$515

Find flight deals from Greenville to Ontario

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$317
(Delta)

One-way from

$159
(American Airlines)

Popular in

April

Cheapest in

January

Average price

$504
Provider with most accurate pricing for Greenville-Ontario flight deals.
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Provider most trusted by Cheapflights users for Greenville-Ontario flights.
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From Greenville to Ontario
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One-way flight from Greenville to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($34 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Cheapflights Fare Finder

 
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

Price

Cheapest round-trip

GreenvilleOntario

GSP Greenville - ONT Ontario

GSPONT

Greenville

Tue 2/9

5:15 pm-10:15 pm

1 stop8h 00m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$245

GreenvilleOntario

GSP Greenville - ONT Ontario

GSPONT

Greenville

Sat 11/21

4:29 pm-8:51 pm

1 stop7h 22m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$258

GreenvilleOntario

GSP Greenville - ONT Ontario

GSPONT

Greenville

Wed 11/11

4:29 pm-8:51 pm

1 stop7h 22m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$266

GreenvilleOntario

GSP Greenville - ONT Ontario

GSPONT

Greenville

Fri 11/6

4:29 pm-8:51 pm

1 stop7h 22m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$384

GreenvilleOntario

GSP Greenville - ONT Ontario

GSPONT

Greenville

Sat 2/6

5:15 pm-10:15 pm

1 stop8h 00m

Ontario

Sat 2/13

5:00 am-9:14 pm

2 stops13h 14m

$390

GreenvilleOntario

GSP Greenville - ONT Ontario

GSPONT

Greenville

Fri 11/20

4:29 pm-8:51 pm

1 stop7h 22m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$400

GreenvilleOntario

GSP Greenville - ONT Ontario

GSPONT

Greenville

Tue 2/23

5:40 am-11:27 am

1 stop8h 47m

Ontario

Tue 3/2

12:00 pm-11:37 pm

1 stop8h 37m

$412

GreenvilleOntario

GSP Greenville - ONT Ontario

GSPONT

Greenville

Tue 2/16

5:05 pm-9:59 pm

1 stop7h 54m

Ontario

Sat 2/20

5:00 am-9:14 pm

2 stops13h 14m

$433

GreenvilleOntario

GSP Greenville - ONT Ontario

GSPONT

Greenville

Tue 11/10

5:12 pm-9:40 pm

1 stop7h 28m

Ontario

Wed 11/11

5:00 am-3:03 pm

1 stop7h 03m

$447

GreenvilleOntario

GSP Greenville - ONT Ontario

GSPONT

Greenville

Thu 11/19

7:01 am-6:17 pm

2 stops14h 16m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$455

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/22

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Compare providers for flights from Greenville to Ontario

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Greenville to Ontario in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Greenville to Ontario

How much does it cost to fly round-trip from Greenville to Ontario?

Airfare is below average for this route at the moment.

Greenville to Ontario flights typically cost between $500 and $602 in February.
The cheapest round-trip price found within the last 5 days was $317 on Delta (Feb 6-Feb 13).

Reviews of airlines servicing Ontario

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.
Delta
7.8
Good
8,676 reviews

Entertainment

7.8

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.8
Good
8,676 reviews
Delta
7.8
Good
8,676 reviews

Entertainment

7.8

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.0
Good
12,187 reviews
Delta
7.8
Good
8,676 reviews

Entertainment

7.8

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

  • How long is the flight from Greenville to Ontario?

    United Airlines and Delta can get you from Greenville to Ontario in just under 8h. Your travel time can differ by up to 47m. Airlines will cover a distance of 2004 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Greenville to Ontario round-trip?

    Our cheapest airline available from Greenville to Ontario is Delta. Our recent data shows that you can find tickets from as low as $351 on this airline. An additional option worth looking into is American Airlines, starting at $368. Users have found that Delta is 38% cheaper than the other options available to this destination.

  • Can I find deals for flights from Greenville to Ontario that include hotel bookings?

    Yes. In addition to deals on Greenville to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Greenville to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Greenville to Ontario.

  • Can I find deals for business class flights from Greenville to Ontario?

    Yes. Cheapflights offers flight deals from Greenville to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Top 2 airlines flying from Greenville to Ontario

AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$351Average$429FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$368Average$494FlexibilityNo cancel feeOn-time71%

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