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

United Airlines and Southwest 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 74% 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 September 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

Round-trip

One-way

Last minute

Cheap round-trip flights

7:19 am - 1:43 pmGSP-ONT

9h 24m1 stop

10:57 am - 10:38 pmONT-GSP

8h 41m1 stop

$363American Airlines

Find Deal

Wed, Oct 22 - Wed, Oct 29

4:29 pm - 8:24 pmGSP-ONT

6h 55m1 stop

5:05 am - 9:59 pmONT-GSP

13h 54m2 stops

$368United Airlines

Find Deal

Wed, Oct 22 - Wed, Oct 29

5:30 am - 10:26 amGSP-ONT

7h 56m1 stop

11:36 am - 10:18 pmONT-GSP

7h 42m1 stop

$370Delta

Find Deal

Tue, Nov 4 - Sat, Nov 8

11:29 am - 10:22 pmGSP-ONT

13h 53m2 stops

7:35 am - 11:55 pmONT-GSP

13h 20m2 stops

$373Delta

Find Deal

Wed, Oct 22 - Wed, Oct 29

5:30 am - 10:26 amGSP-ONT

7h 56m1 stop

9:50 am - 11:55 pmONT-GSP

11h 05m2 stops

$375Delta

Find Deal

Tue, Nov 4 - Sat, Nov 8

5:30 am - 12:14 pmGSP-ONT

9h 44m2 stops

6:00 am - 5:41 pmONT-GSP

8h 41m2 stops

$380Delta

Find Deal

Tue, Nov 4 - Sat, Nov 8

5:34 pm - 10:26 pmGSP-ONT

7h 52m1 stop

7:00 am - 4:52 pmONT-GSP

6h 52m1 stop

$463United Airlines

Find Deal

Wed, Jan 21 - Wed, Feb 4

4:17 pm - 8:44 pmGSP-ONT

7h 27m1 stop

5:05 am - 2:59 pmONT-GSP

6h 54m1 stop

$470United Airlines

Find Deal

Sat, Nov 8 - Mon, Nov 10

7:40 am - 6:05 pmGSP-ONT

13h 25m1 stop

5:10 am - 3:40 pmONT-GSP

7h 30m2 stops

$684Southwest

Find Deal

Fri, Dec 26 - Fri, Jan 2

7:40 am - 4:45 pmGSP-ONT

12h 05m2 stops

5:10 am - 3:40 pmONT-GSP

7h 30m2 stops

$778Southwest

Find Deal

Fri, Dec 26 - Fri, Jan 2

Southwest flights from Greenville to Ontario

Our best Southwest deals on Greenville to Ontario flight tickets

Southwest

Dec 26

GSP7:40 amGreenville

13h 25m

1 stop

ONT6:05 pmOntario

Jan 2

ONT5:10 amOntario

7h 30m

2 stops

GSP3:40 pmGreenville

$684

Find similar

Southwest

Dec 26

GSP7:40 amGreenville

12h 05m

2 stops

ONT4:45 pmOntario

Jan 2

ONT5:10 amOntario

7h 30m

2 stops

GSP3:40 pmGreenville

$778

Find similar

American Airlines flights from Greenville to Ontario

Our best American Airlines deals on Greenville to Ontario flight tickets

American Airlines

Oct 22

GSP7:19 amGreenville

9h 24m

1 stop

ONT1:43 pmOntario

Oct 29

ONT10:57 amOntario

8h 41m

1 stop

GSP10:38 pmGreenville

$363

Find similar

American Airlines

Dec 30

GSP6:00 amGreenville

8h 53m

1 stop

ONT11:53 amOntario

Jan 2

ONT10:40 pmOntario

6h 56m

1 stop

GSP8:36 amGreenville

$473

Find similar

American Airlines

Dec 30

GSP6:00 amGreenville

8h 53m

1 stop

ONT11:53 amOntario

Jan 2

ONT10:40 pmOntario

6h 56m

1 stop

GSP8:36 amGreenville

$499

Find similar

Fly from

Fly to

Route

Depart

Return

Price

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Wed 10/22

7:19 am-1:43 pm

1 stop9h 24m

Ontario

Wed 10/29

10:57 am-10:38 pm

1 stop8h 41m

$363

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Wed 10/22

4:29 pm-8:24 pm

1 stop6h 55m

Ontario

Wed 10/29

5:05 am-9:59 pm

2 stops13h 54m

$368

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Tue 11/4

5:30 am-10:26 am

1 stop7h 56m

Ontario

Sat 11/8

11:36 am-10:18 pm

1 stop7h 42m

$370

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Wed 10/22

11:29 am-10:22 pm

2 stops13h 53m

Ontario

Wed 10/29

7:35 am-11:55 pm

2 stops13h 20m

$373

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Tue 11/4

5:30 am-10:26 am

1 stop7h 56m

Ontario

Sat 11/8

9:50 am-11:55 pm

2 stops11h 05m

$375

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Tue 11/4

5:30 am-12:14 pm

2 stops9h 44m

Ontario

Sat 11/8

6:00 am-5:41 pm

2 stops8h 41m

$380

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Wed 1/21

5:34 pm-10:26 pm

1 stop7h 52m

Ontario

Wed 2/4

7:00 am-4:52 pm

1 stop6h 52m

$463

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Sat 11/8

4:17 pm-8:44 pm

1 stop7h 27m

Ontario

Mon 11/10

5:05 am-2:59 pm

1 stop6h 54m

$470

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Fri 12/26

7:40 am-6:05 pm

1 stop13h 25m

Ontario

Fri 1/2

5:10 am-3:40 pm

2 stops7h 30m

$684

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Fri 12/26

7:40 am-4:45 pm

2 stops12h 05m

Ontario

Fri 1/2

5:10 am-3:40 pm

2 stops7h 30m

$778

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, October 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 $387. If you aren’t able to travel during the month of October, then book flights to Ontario from Greenville during February instead. Flights to Ontario in February, while not as cheap as those in October, still average around $388.

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

Direct flights	None

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 51m 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 September 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 65% of the total bookings. Other popular airlines include Delta with 35%.

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 10,000 reviews		Search American Airlines flights
Delta	PriceFrom $328	Free Cancellation	Rating 7.9 7,973 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.