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$200+ Cheap flights from Ontario to Greenville (ONT - GSP)

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 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — GSP
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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The best prices from Ontario to Greenville are usually found in April or October, booked 44 days in advance, depart on a Saturday or Wednesday and return on a Friday

Cheap flight deals from Ontario to Greenville

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Greenville (GSP). 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 January 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$347
(Delta)

One-way from

$200
(Delta)

Popular in

January

Cheapest in

April

Average price

$814
Provider with most accurate pricing for Ontario-Greenville flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Greenville flights.
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From Ontario to Greenville
Search Deals
One-way flight from Ontario to Greenville
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($94 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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Find flight deals from Ontario to Greenville

Cheapest flights from Ontario to Greenville
Explore the most affordable flight options available from Ontario to Greenville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This Delta deal was found by Cheapflights users on 1/20. 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 2/251:05 pmONT - GSP
1 stop7h 44mDelta
Tue 3/45:22 pmGSP - ONT
1 stop8h 30mDelta
Deal found 1/20$347
This American Airlines deal was found by Cheapflights users on 1/21. 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.
Thu 2/207:30 pmONT - GSP
2 stops10h 06mAmerican Airlines
Thu 2/272:34 pmGSP - ONT
2 stops10h 30mAmerican Airlines
Deal found 1/21$385
This Southwest deal was found by Cheapflights users on 1/21. 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.
Thu 3/276:30 amONT - GSP
2 stops12h 30mSouthwest
Sun 3/303:25 pmGSP - ONT
2 stops11h 40mSouthwest
Deal found 1/21$477
This United Airlines deal was found by Cheapflights users on 1/19. 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 2/186:00 amONT - GSP
1 stop7h 07mUnited Airlines
Tue 2/254:05 pmGSP - ONT
1 stop7h 47mUnited Airlines
Deal found 1/19$487
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 2/44:06 pmONT - GSP
3 stops27h 24mAlaska Airlines
Fri 2/711:58 amGSP - ONT
2 stops25h 51mAlaska Airlines
Deal found 1/20$663

Find flights from Ontario to Greenville within your budget

Customize your flight search to find flights from Ontario to Greenville 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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Tue 2/25

1:05 pm-11:49 pm

1 stop7h 44m

Greenville

Tue 3/4

5:22 pm-10:52 pm

1 stop8h 30m

$347

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Wed 2/26

10:05 am-10:38 pm

2 stops9h 33m

Greenville

Mon 3/3

2:34 pm-9:02 pm

1 stop9h 28m

$404

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Thu 3/20

7:10 pm-9:55 am

2 stops11h 45m

Greenville

Tue 3/25

11:35 am-3:30 pm

1 stop6h 55m

$444

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Tue 2/18

6:00 am-4:07 pm

1 stop7h 07m

Greenville

Tue 2/25

4:05 pm-8:52 pm

1 stop7h 47m

$487

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Tue 2/4

4:06 pm-10:30 pm

3 stops27h 24m

Greenville

Fri 2/7

11:58 am-10:49 am

2 stops25h 51m

$663

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Tue 2/18

7:05 am-6:32 pm

1 stop8h 27m

$200

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Sat 2/8

6:15 am-10:38 pm

2 stops13h 23m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Compare providers for flights from Ontario to Greenville

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 Ontario to Greenville in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 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 Ontario-Greenville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Greenville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Greenville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Greenville 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 Ontario-Greenville 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 Ontario to Greenville

Have a flexible travel schedule? Discover the best time to fly to Greenville from Ontario with our price prediction graph.
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.

Travel insights for flights from Ontario to Greenville

Get recent, data-driven insights about flights from Ontario to Greenville including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Ontario to Greenville?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Greenville. Price data was last updated on January 17, 2025.

The best time to book flights from Ontario to Greenville is 44 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Ontario to Greenville?

Currently, January is the cheapest month in which you can book a flight from Ontario to Greenville (average of $329). Flying from Ontario to Greenville in March is currently the most expensive (average of $396). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Rainfall in Greenville by month

Plan your trip to Greenville by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Greenville ranges from 3.6 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. November is typically the driest time to visit Greenville when rainfall is around 3.6 in.

Temperature in Greenville by month

Plan your trip to Greenville by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Greenville, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Greenville

Get insights into the airlines that provide service to Greenville. 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 Greenville. Reviews last updated January 21, 2025.
Read through reviews of airlines operating flights from Ontario to Greenville, such as Delta, United Airlines and Alaska Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Southwest
8.1
Very good
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Alaska Airlines
8.0
Very good
9,706 reviews
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

United Airlines
7.4
Good
8,984 reviews
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Related info for your journey

Find useful and relevant information for your journey from Ontario to Greenville. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    According to our current data, Delta ($347), American Airlines ($404), and Southwest ($444) offers the cheapest pricing from Ontario to Greenville. These flights start at 25% lower than the current average price 3 months from now.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Ontario to Greenville?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Greenville (average of $329). Flying from Ontario to Greenville in March is currently the most expensive (average of $396). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
Simpsonville
Seneca
Anderson

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Top 3 airlines flying from Ontario to Greenville

Discover the top 3 airlines that operate flights from Ontario to Greenville. 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$296Average$461FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$342Average$442FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$371Average$457FlexibilityNo cancel feeOn-time69%
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