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

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

What airlines fly to Ontario?

American Airlines, Spirit Airlines and Delta 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 73% 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 August 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.

$117 Cheap Flights from Greenville to Ontario in 2025

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Find the cheapest flights from Greenville to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

5:20 pm - 9:24 pmGSP-ONT

7h 04m1 stop

10:35 pm - 8:57 amONT-GSP

7h 22m1 stop

$275American Airlines

Find Deal

Wed, Sep 3 - Wed, Sep 10

7:15 am - 1:54 pmGSP-ONT

9h 39m1 stop

10:53 am - 11:56 pmONT-GSP

10h 03m2 stops

$280American Airlines

Find Deal

Wed, Sep 3 - Wed, Sep 10

5:30 am - 10:35 amGSP-ONT

8h 05m1 stop

7:05 am - 7:00 pmONT-GSP

8h 55m1 stop

$297Delta

Find Deal

Thu, Aug 28 - Sat, Aug 30

5:30 am - 10:35 amGSP-ONT

8h 05m1 stop

10:00 pm - 10:44 amONT-GSP

9h 44m2 stops

$302Delta

Find Deal

Thu, Sep 4 - Thu, Sep 11

11:30 am - 10:49 pmGSP-ONT

14h 19m2 stops

5:50 pm - 10:48 amONT-GSP

13h 58m2 stops

$307Delta

Find Deal

Sat, Oct 18 - Sat, Oct 25

7:24 am - 11:58 amGSP-ONT

7h 34m1 stop

6:10 am - 5:05 pmONT-GSP

7h 55m1 stop

$313American Airlines

Find Deal

Thu, Oct 16 - Tue, Oct 21

4:59 pm - 9:25 pmGSP-ONT

7h 26m1 stop

6:50 pm - 8:51 amONT-GSP

11h 01m2 stops

$318United Airlines

Find Deal

Fri, Aug 29 - Sat, Aug 30

4:59 pm - 9:25 pmGSP-ONT

7h 26m1 stop

6:38 pm - 8:51 amONT-GSP

11h 13m2 stops

$348United Airlines

Find Deal

Thu, Aug 28 - Fri, Aug 29

1:50 pm - 10:30 pmGSP-ONT

11h 40m2 stops

7:00 am - 9:00 pmONT-GSP

11h 00m2 stops

$368Southwest

Find Deal

Thu, Sep 4 - Thu, Sep 11

1:50 pm - 10:00 pmGSP-ONT

11h 10m2 stops

1:55 pm - 10:35 amONT-GSP

17h 40m2 stops

$401Southwest

Find Deal

Thu, Aug 28 - Sat, Aug 30

American Airlines flights from Greenville to Ontario

Our best American Airlines deals on Greenville to Ontario flight tickets

American Airlines

Sep 3

GSP5:20 pmGreenville

7h 04m

1 stop

ONT9:24 pmOntario

Sep 10

ONT10:35 pmOntario

7h 22m

1 stop

GSP8:57 amGreenville

$275

Find similar

American Airlines

Sep 3

GSP7:15 amGreenville

9h 39m

1 stop

ONT1:54 pmOntario

Sep 10

ONT10:53 amOntario

10h 03m

2 stops

GSP11:56 pmGreenville

$280

Find similar

American Airlines

Oct 16

GSP7:24 amGreenville

7h 34m

1 stop

ONT11:58 amOntario

Oct 21

ONT6:10 amOntario

7h 55m

1 stop

GSP5:05 pmGreenville

$313

Find similar

Delta flights from Greenville to Ontario

Our best Delta deals on Greenville to Ontario flight tickets

Delta

Aug 28

GSP5:30 amGreenville

8h 05m

1 stop

ONT10:35 amOntario

Aug 30

ONT7:05 amOntario

8h 55m

1 stop

GSP7:00 pmGreenville

$297

Find similar

Delta

Sep 4

GSP5:30 amGreenville

8h 05m

1 stop

ONT10:35 amOntario

Sep 11

ONT10:00 pmOntario

9h 44m

2 stops

GSP10:44 amGreenville

$302

Find similar

Delta

Oct 18

GSP11:30 amGreenville

14h 19m

2 stops

ONT10:49 pmOntario

Oct 25

ONT5:50 pmOntario

13h 58m

2 stops

GSP10:48 amGreenville

$307

Find similar

Fly from

Fly to

Route

Depart

Return

Price

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Wed 9/3

5:20 pm-9:24 pm

1 stop7h 04m

Ontario

Wed 9/10

10:35 pm-8:57 am

1 stop7h 22m

$275

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Wed 9/3

7:15 am-1:54 pm

1 stop9h 39m

Ontario

Wed 9/10

10:53 am-11:56 pm

2 stops10h 03m

$280

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Thu 8/28

5:30 am-10:35 am

1 stop8h 05m

Ontario

Sat 8/30

7:05 am-7:00 pm

1 stop8h 55m

$297

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Thu 9/4

5:30 am-10:35 am

1 stop8h 05m

Ontario

Thu 9/11

10:00 pm-10:44 am

2 stops9h 44m

$302

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Sat 10/18

11:30 am-10:49 pm

2 stops14h 19m

Ontario

Sat 10/25

5:50 pm-10:48 am

2 stops13h 58m

$307

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Thu 10/16

7:24 am-11:58 am

1 stop7h 34m

Ontario

Tue 10/21

6:10 am-5:05 pm

1 stop7h 55m

$313

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Fri 8/29

4:59 pm-9:25 pm

1 stop7h 26m

Ontario

Sat 8/30

6:50 pm-8:51 am

2 stops11h 01m

$318

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Thu 8/28

4:59 pm-9:25 pm

1 stop7h 26m

Ontario

Fri 8/29

6:38 pm-8:51 am

2 stops11h 13m

$348

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Thu 9/4

1:50 pm-10:30 pm

2 stops11h 40m

Ontario

Thu 9/11

7:00 am-9:00 pm

2 stops11h 00m

$368

GreenvilleOntario

GSP - ONT

GSPONT

Greenville

Thu 8/28

1:50 pm-10:00 pm

2 stops11h 10m

Ontario

Sat 8/30

1:55 pm-10:35 am

2 stops17h 40m

$401

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 $373. 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

Best Price Found	$117
Fastest flight time	6h 55m
Direct flights	None
Airports in Ontario	1 airport

The best one-way flight to Ontario from Greenville in the past 72 hours is $117. The best round-trip flight deal from Greenville to Ontario found on momondo in the last 72 hours is $275.

The fastest flight from Greenville to Ontario takes 6h 55m

There are no direct flights from Greenville to Ontario. Popular non-direct route for this connection is Greenville Airport - Ontario Airport.

There is 1 airport near Ontario: Ontario (ONT)

Search flight deals

How far is Greenville to Ontario by plane?
The distance between Greenville and Ontario is about 1997.5 mi. 6h 55m 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 August 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 66% of the total bookings. Other popular airlines include Delta with 34%.

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 8.0 7,985 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.