What is the cheapest airline that flies from Greenville to Ontario?

United Airlines and Delta are the most popular carriers operating from Greenville to Ontario

What airlines fly to Ontario?

American Airlines, Delta and Spirit Airlines are the top three most popular airlines that fly to Ontario from Greenville according to our data. American Airlines is the first choice among our users, with 76% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 7 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Greenville Airport to Ontario Airport?

Prices for flights from Greenville Airport to Ontario Airport were last updated today.

How many operators does momondo search for flights from Greenville Airport to Ontario Airport?

As of December 2025, there are 2 operators available to choose from for flights from Greenville Airport to Ontario Airport.

How old do you have to be to fly from Greenville Airport to Ontario Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Greenville Airport to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$224 Cheap Flights from Greenville to Ontario in 2025/26

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Find the cheapest flights from Greenville to Los Angeles

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Cheap round-trip flights

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5:40 am - 12:02 pm

GSP

ONT

9h 22m1 stop

10:20 pm - 9:16 am

ONT

GSP

7h 56m1 stop

$350Delta

Wed, Feb 18 - Mon, Feb 23

4:40 pm - 10:48 pm

GSP

ONT

9h 08m1 stop

10:58 am - 8:56 pm

ONT

GSP

6h 58m1 stop

$374American Airlines

Tue, Jan 6 - Sat, Jan 17

4:40 pm - 10:48 pm

GSP

ONT

9h 08m1 stop

9:59 am - 11:51 pm

ONT

GSP

10h 52m2 stops

$380American Airlines

Tue, Jan 6 - Sat, Jan 17

12:06 pm - 6:20 pm

GSP

ONT

9h 14m2 stops

10:58 am - 8:56 pm

ONT

GSP

6h 58m1 stop

$387American Airlines

Tue, Jan 6 - Sat, Jan 17

12:06 pm - 6:20 pm

GSP

ONT

9h 14m2 stops

9:59 am - 8:56 pm

ONT

GSP

7h 57m2 stops

$392American Airlines

Tue, Jan 6 - Sat, Jan 17

6:25 am - 4:05 pm

GSP

ONT

12h 40m2 stops

10:58 am - 8:56 pm

ONT

GSP

6h 58m1 stop

$399American Airlines

Tue, Jan 6 - Sat, Jan 17

6:25 am - 4:05 pm

GSP

ONT

12h 40m2 stops

6:27 am - 8:48 pm

ONT

GSP

11h 21m2 stops

$404American Airlines

Tue, Jan 6 - Sat, Jan 17

7:03 am - 4:05 pm

GSP

ONT

12h 02m2 stops

10:58 am - 11:51 pm

ONT

GSP

9h 53m2 stops

$405American Airlines

Tue, Jan 6 - Sat, Jan 17

4:40 pm - 10:48 pm

GSP

ONT

9h 08m1 stop

10:58 am - 8:56 pm

ONT

GSP

6h 58m1 stop

$407American Airlines

Tue, Feb 3 - Sun, Feb 8

4:15 pm - 8:58 pm

GSP

ONT

7h 43m1 stop

6:10 am - 11:48 pm

ONT

GSP

14h 38m2 stops

$412United Airlines

Tue, Feb 3 - Sun, Feb 8

Southwest flights from Greenville to Ontario

Our best Southwest deals on Greenville to Ontario flight tickets

Southwest

Feb 3

GSP11:15 amGreenville

10h 25m

2 stops

ONT6:40 pmOntario

Feb 8

ONT5:45 pmOntario

13h 25m

2 stops

GSP10:10 amGreenville

$417

Find similar

Southwest

Mar 22

GSP12:30 pmGreenville

11h 10m

1 stop

ONT8:40 pmOntario

Mar 28

ONT9:45 pmOntario

11h 10m

2 stops

GSP11:55 amGreenville

$513

Find similar

Southwest

Dec 24

GSP3:05 pmGreenville

7h 10m

1 stop

ONT7:15 pmOntario

Jan 4

ONT5:10 amOntario

7h 30m

2 stops

GSP3:40 pmGreenville

$537

Find similar

United Airlines flights from Greenville to Ontario

Our best United Airlines deals on Greenville to Ontario flight tickets

United Airlines

Feb 3

GSP4:15 pmGreenville

7h 43m

1 stop

ONT8:58 pmOntario

Feb 8

ONT6:10 amOntario

14h 38m

2 stops

GSP11:48 pmGreenville

$412

Find similar

United Airlines

Jan 9

GSP10:00 amGreenville

10h 43m

2 stops

ONT5:43 pmOntario

Jan 16

ONT6:39 pmOntario

12h 37m

2 stops

GSP10:16 amGreenville

$457

Find similar

United Airlines

Feb 18

GSP10:00 amGreenville

15h 57m

2 stops

ONT10:57 pmOntario

Feb 23

ONT6:37 pmOntario

13h 44m

2 stops

GSP11:21 amGreenville

$460

Find similar

Fly from

Fly to

Route

Depart

Return

Price

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Wed 2/18

5:40 am-12:02 pm

1 stop9h 22m

Ontario

Mon 2/23

10:20 pm-9:16 am

1 stop7h 56m

$350

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Tue 1/6

4:40 pm-10:48 pm

1 stop9h 08m

Ontario

Sat 1/17

10:58 am-8:56 pm

1 stop6h 58m

$374

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Tue 1/6

4:40 pm-10:48 pm

1 stop9h 08m

Ontario

Sat 1/17

9:59 am-11:51 pm

2 stops10h 52m

$380

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Tue 1/6

12:06 pm-6:20 pm

2 stops9h 14m

Ontario

Sat 1/17

10:58 am-8:56 pm

1 stop6h 58m

$387

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Tue 1/6

12:06 pm-6:20 pm

2 stops9h 14m

Ontario

Sat 1/17

9:59 am-8:56 pm

2 stops7h 57m

$392

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Tue 1/6

6:25 am-4:05 pm

2 stops12h 40m

Ontario

Sat 1/17

10:58 am-8:56 pm

1 stop6h 58m

$399

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Tue 1/6

6:25 am-4:05 pm

2 stops12h 40m

Ontario

Sat 1/17

6:27 am-8:48 pm

2 stops11h 21m

$404

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Tue 1/6

7:03 am-4:05 pm

2 stops12h 02m

Ontario

Sat 1/17

10:58 am-11:51 pm

2 stops9h 53m

$405

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Tue 2/3

4:40 pm-10:48 pm

1 stop9h 08m

Ontario

Sun 2/8

10:58 am-8:56 pm

1 stop6h 58m

$407

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Tue 2/3

4:15 pm-8:58 pm

1 stop7h 43m

Ontario

Sun 2/8

6:10 am-11:48 pm

2 stops14h 38m

$412

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Greenville to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Ontario?

In general, January is the cheapest month to fly from Greenville to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $368. If you aren’t able to travel during the month of January, then book flights to Ontario from Greenville during October instead. Flights to Ontario in October, while not as cheap as those in January, still average around $387.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Friday when prices can be found for as low as $428. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Greenville to Ontario for around $578.

What is the cheapest time of day to depart on your flight to Ontario?

In the evening is the cheapest time of day to fly from Greenville to Ontario when you can find flight prices for as low as $439. Flying to Ontario in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $610 on average. Flights to Ontario from Greenville at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How have Greenville to Ontario flight prices changed over time?

When to book flights from Greenville to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Greenville to Ontario according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Greenville to Ontario (GSP to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Greenville to Ontario

Fastest flight time	6h 45m
Direct flights	None

The fastest flight from Greenville to Ontario takes 6h 45m

There are no direct flights from Greenville to Ontario. There are no popular flight routes from Greenville to Ontario.

Search flight deals

How far is Greenville to Ontario by plane?
The distance between Greenville and Ontario is about 1997.5 mi. 6h 45m is a normal flight duration for this route.
When did momondo last update prices for flights from Greenville Airport to Ontario Airport?
Prices for flights from Greenville Airport to Ontario Airport were last updated today.
How many operators does momondo search for flights from Greenville Airport to Ontario Airport?
As of December 2025, there are 2 operators available to choose from for flights from Greenville Airport to Ontario Airport.
How old do you have to be to fly from Greenville Airport to Ontario Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Greenville Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Greenville to Ontario?
Based on momondo bookings for flights between Greenville and Ontario, the leading airline is American Airlines, making up 62% of the total bookings. Other popular airlines include Delta with 38%.

Best airlines flying from Greenville to Ontario

Compare and see reviews for airlines that fly from Greenville to Ontario with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $312	Free Cancellation	Rating 7.2 11,050 reviews		Search American Airlines flights
Delta	PriceFrom $346	Free Cancellation	Rating 7.9 8,007 reviews		Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Greenville to Ontario?

It is quick and easy to find Greenville to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

Can I find flights from Greenville to Ontario with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Greenville to Ontario flights to just show those with flexible booking policies.

How can momondo help me find flights from Greenville to Ontario?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ontario from Greenville.

I’m not ready to book a flight from Greenville to Ontario right now. Can momondo alert me if prices change?

Price alerts on flights to Ontario from Greenville are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.