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

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

What airlines fly to Greenville?

American Airlines, Delta and Frontier are the top three most popular airlines that fly to Greenville from Ontario according to our data. American Airlines is the first choice among our users, with 75% of people opting to fly with this airline when traveling to Greenville. Keep in mind that there are 7 different airlines that fly to Greenville on a routine basis, so you have a few additional options to choose from.

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

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

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

As of October 2026, there are 4 operators available to choose from for flights from Ontario Airport to Greenville Airport.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Greenville Airport.

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

The necessary travel and health documents for your Greenville Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$182 Cheap Flights from Ontario to Greenville in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Greenville

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 4:27 pmONT Ontario-GSP Greenville

7h 27m1 stop Dallas/Fort Worth

5:17 pm - 11:59 pmGSP Greenville-ONT Ontario

9h 42m1 stop Dallas/Fort Worth

$384American Airlines

Wed, Nov 18 - Mon, Nov 23

12:42 pm - 9:58 pmONT Ontario-GSP Greenville

6h 16m1 stop Dallas/Fort Worth

5:17 pm - 11:59 pmGSP Greenville-ONT Ontario

9h 42m1 stop Dallas/Fort Worth

$384American Airlines

Sat, Nov 14 - Mon, Nov 23

10:05 am - 8:50 pmONT Ontario-GSP Greenville

7h 45m2 stops Denver Intl Nashville Intl

4:55 pm - 11:15 pmGSP Greenville-ONT Ontario

9h 20m2 stops Nashville Intl Phoenix Sky Harbor Intl

$417Southwest

Tue, Nov 17 - Sat, Nov 21

10:05 am - 8:50 pmONT Ontario-GSP Greenville

7h 45m2 stops Denver Intl Nashville Intl

4:55 pm - 9:50 pmGSP Greenville-ONT Ontario

7h 55m1 stop Nashville Intl

$435Southwest

Tue, Nov 17 - Sat, Nov 21

7:00 am - 4:09 pmONT Ontario-GSP Greenville

6h 09m1 stop Atlanta Hartsfield-Jackson

7:00 am - 11:27 amGSP Greenville-ONT Ontario

7h 27m1 stop Atlanta Hartsfield-Jackson

$438Delta

Wed, Jan 6 - Wed, Jan 13

7:00 am - 4:09 pmONT Ontario-GSP Greenville

6h 09m1 stop Atlanta Hartsfield-Jackson

5:05 pm - 10:14 pmGSP Greenville-ONT Ontario

8h 09m1 stop Atlanta Hartsfield-Jackson

$438Delta

Fri, Jan 8 - Mon, Jan 11

6:00 am - 3:14 pmONT Ontario-GSP Greenville

6h 14m1 stop Houston George Bush Intcntl

4:29 pm - 8:51 pmGSP Greenville-ONT Ontario

7h 22m1 stop Denver Intl

$447United Airlines

Sat, Nov 14 - Wed, Nov 18

7:00 am - 4:56 pmONT Ontario-GSP Greenville

6h 56m1 stop Chicago O'Hare Intl

5:12 pm - 9:40 pmGSP Greenville-ONT Ontario

7h 28m1 stop Houston George Bush Intcntl

$447United Airlines

Sat, Nov 14 - Wed, Nov 18

6:00 am - 9:59 pmONT Ontario-GSP Greenville

12h 59m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

11:37 am - 11:31 pmGSP Greenville-ONT Ontario

14h 54m2 stops Chicago O'Hare Intl Seattle/Tacoma Intl

$2,144Alaska Airlines

Fri, Nov 20 - Sun, Nov 22

6:00 am - 9:59 pmONT Ontario-GSP Greenville

12h 59m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

11:37 am - 11:31 pmGSP Greenville-ONT Ontario

14h 54m2 stops Chicago O'Hare Intl Seattle/Tacoma Intl

$2,438Alaska Airlines

Fri, Nov 27 - Sat, Nov 28

Cheap last minute flights

Enter your travel dates to find the best prices.

8:35 am - 6:30 pmONT Ontario-GSP Greenville

6h 55m1 stop Nashville Intl

2:10 pm - 6:10 pmGSP Greenville-ONT Ontario

7h 00m1 stop Nashville Intl

$827Southwest

Tue, Oct 27 - Sat, Oct 31

8:35 am - 6:30 pmONT Ontario-GSP Greenville

6h 55m1 stop Nashville Intl

8:30 am - 5:55 pmGSP Greenville-ONT Ontario

12h 25m2 stops Baltimore/Washington Denver Intl

$832Southwest

Tue, Oct 27 - Sat, Oct 31

6:20 am - 6:30 pmONT Ontario-GSP Greenville

9h 10m2 stops San Jose Nashville Intl

8:30 am - 5:55 pmGSP Greenville-ONT Ontario

12h 25m2 stops Baltimore/Washington Denver Intl

$837Southwest

Tue, Oct 27 - Sat, Oct 31

6:59 am - 4:56 pmONT Ontario-GSP Greenville

6h 57m1 stop Chicago O'Hare Intl

5:12 pm - 9:40 pmGSP Greenville-ONT Ontario

7h 28m1 stop Houston George Bush Intcntl

$1,017United Airlines

Mon, Oct 26 - Wed, Oct 28

6:00 am - 8:58 pmONT Ontario-GSP Greenville

11h 58m2 stops Houston George Bush Intcntl Chicago O'Hare Intl

5:12 pm - 9:40 pmGSP Greenville-ONT Ontario

7h 28m1 stop Houston George Bush Intcntl

$1,022United Airlines

Mon, Oct 26 - Wed, Oct 28

6:00 am - 8:58 pmONT Ontario-GSP Greenville

11h 58m2 stops San Francisco Chicago O'Hare Intl

10:42 am - 8:15 pmGSP Greenville-ONT Ontario

12h 33m2 stops Chicago O'Hare Intl San Francisco

$1,027United Airlines

Mon, Oct 26 - Wed, Oct 28

10:10 pm - 8:24 amONT Ontario-GSP Greenville

7h 14m1 stop Charlotte Douglas

8:00 am - 1:30 pmGSP Greenville-ONT Ontario

8h 30m1 stop Dallas/Fort Worth

$1,097American Airlines

Thu, Oct 22 - Thu, Oct 29

10:25 am - 11:21 pmONT Ontario-GSP Greenville

9h 56m2 stops Dallas/Fort Worth Charlotte Douglas

8:00 am - 11:53 amGSP Greenville-ONT Ontario

6h 53m1 stop Dallas/Fort Worth

$1,102American Airlines

Thu, Oct 22 - Thu, Oct 29

7:34 pm - 8:24 amONT Ontario-GSP Greenville

9h 50m2 stops Phoenix Sky Harbor Intl Charlotte Douglas

8:59 am - 3:16 pmGSP Greenville-ONT Ontario

9h 17m2 stops Charlotte Douglas Phoenix Sky Harbor Intl

$1,107American Airlines

Thu, Oct 22 - Thu, Oct 29

6:56 pm - 11:08 amONT Ontario-GSP Greenville

13h 12m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

6:01 am - 6:00 pmGSP Greenville-ONT Ontario

14h 59m2 stops Chicago O'Hare Intl Seattle/Tacoma Intl

$1,187Alaska Airlines

Fri, Oct 23 - Tue, Oct 27

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United Airlines flights from Ontario to Greenville

Our best United Airlines deals on Ontario to Greenville flight tickets

United Airlines

Nov 14

ONT6:00 amOntario

6h 14m

1 stop

GSP3:14 pmGreenville

Nov 18

GSP6:20 amGreenville

12h 13m

2 stops

ONT3:33 pmOntario

$452

United Airlines

Nov 14

ONT6:00 amOntario

11h 58m

2 stops

GSP8:58 pmGreenville

Nov 18

GSP10:42 amGreenville

12h 33m

2 stops

ONT8:15 pmOntario

$458

United Airlines

Nov 18

ONT5:00 amOntario

7h 03m

1 stop

GSP3:03 pmGreenville

Nov 23

GSP6:20 amGreenville

14h 36m

2 stops

ONT5:56 pmOntario

$473

Southwest flights from Ontario to Greenville

Our best Southwest deals on Ontario to Greenville flight tickets

Southwest

Nov 17

ONT10:05 amOntario

7h 45m

2 stops

GSP8:50 pmGreenville

Nov 21

GSP4:55 pmGreenville

9h 20m

2 stops

ONT11:15 pmOntario

$417

Southwest

Nov 17

ONT10:05 amOntario

7h 45m

2 stops

GSP8:50 pmGreenville

Nov 21

GSP4:55 pmGreenville

7h 55m

1 stop

ONT9:50 pmOntario

$435

Southwest

Dec 24

ONT11:25 amOntario

6h 25m

1 stop

GSP8:50 pmGreenville

Jan 1

GSP7:05 amGreenville

10h 35m

2 stops

ONT2:40 pmOntario

$502

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioGreenville

ONT Ontario - GSP Greenville

ONTGSP

Ontario

Wed 11/18

6:00 am-4:27 pm

1 stop7h 27m

Greenville

Mon 11/23

5:17 pm-11:59 pm

1 stop9h 42m

$384

OntarioGreenville

ONT Ontario - GSP Greenville

ONTGSP

Ontario

Sat 11/14

12:42 pm-9:58 pm

1 stop6h 16m

Greenville

Mon 11/23

5:17 pm-11:59 pm

1 stop9h 42m

$384

OntarioGreenville

ONT Ontario - GSP Greenville

ONTGSP

Ontario

Tue 11/17

10:05 am-8:50 pm

2 stops7h 45m

Greenville

Sat 11/21

4:55 pm-11:15 pm

2 stops9h 20m

$417

OntarioGreenville

ONT Ontario - GSP Greenville

ONTGSP

Ontario

Tue 11/17

10:05 am-8:50 pm

2 stops7h 45m

Greenville

Sat 11/21

4:55 pm-9:50 pm

1 stop7h 55m

$435

Quickest round-trip

OntarioGreenville

ONT Ontario - GSP Greenville

ONTGSP

Ontario

Wed 1/6

7:00 am-4:09 pm

1 stop6h 09m

Greenville

Wed 1/13

7:00 am-11:27 am

1 stop7h 27m

$438

OntarioGreenville

ONT Ontario - GSP Greenville

ONTGSP

Ontario

Fri 1/8

7:00 am-4:09 pm

1 stop6h 09m

Greenville

Mon 1/11

5:05 pm-10:14 pm

1 stop8h 09m

$438

OntarioGreenville

ONT Ontario - GSP Greenville

ONTGSP

Ontario

Sat 11/14

6:00 am-3:14 pm

1 stop6h 14m

Greenville

Wed 11/18

4:29 pm-8:51 pm

1 stop7h 22m

$447

OntarioGreenville

ONT Ontario - GSP Greenville

ONTGSP

Ontario

Sat 11/14

7:00 am-4:56 pm

1 stop6h 56m

Greenville

Wed 11/18

5:12 pm-9:40 pm

1 stop7h 28m

$447

OntarioGreenville

ONT Ontario - GSP Greenville

ONTGSP

Ontario

Fri 11/20

6:00 am-9:59 pm

2 stops12h 59m

Greenville

Sun 11/22

11:37 am-11:31 pm

2 stops14h 54m

$2,144

OntarioGreenville

ONT Ontario - GSP Greenville

ONTGSP

Ontario

Fri 11/27

6:00 am-9:59 pm

2 stops12h 59m

Greenville

Sat 11/28

11:37 am-11:31 pm

2 stops14h 54m

$2,438

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 Ontario to Greenville

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 typical price of a round-trip flight between Ontario and Greenville?

Prices are currently low for flights on this route.

Typical prices usually range from $395 to $625.
The lowest price recently found on this route was $384.

What is the cheapest month to fly to Greenville?

The month of March is another great option to travel to Greenville, with average flight prices from Ontario averaging around $431.

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

According to our data, Thursday is the cheapest day to fly to Greenville from Ontario. The lowest ticket price found for a Thursday departure recently was $198. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $415. These prices are subject to change though, so be sure to set up a Price Alert for flights to Greenville.

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

Our most recent data shows that the best time of day to fly to Greenville is in the morning. Flights from Ontario to Greenville during this time can be as low as $360. Flights to Greenville are more costly at noon, with an average ticket price of $388. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

How have Ontario to Greenville flight prices changed over time?

As of October 2026, prices for Ontario to Greenville flights are approximately 10% cheaper when compared to flights at the same time last year.

When to book flights from Ontario to Greenville

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

Estimated round-trip price

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

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

Best Price Found	$182
Fastest flight time	6h 06m
Direct flights	None

The best one-way flight to Greenville from Ontario in the past 72 hours is $182. The best round-trip flight deal from Ontario to Greenville found on momondo in the last 72 hours is $384.

The fastest flight from Ontario to Greenville takes 6h 06m

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

Search flight deals

Frequently asked questions about flying from Ontario to Greenville

How far is Ontario to Greenville by plane?
A flight from Ontario to Greenville will travel around 1997.5 mi. In terms of flight time, this usually takes a little over 6h 06m.
When did momondo last update prices for flights from Ontario Airport to Greenville Airport?
Prices for flights from Ontario Airport to Greenville Airport were last updated today.
How many operators does momondo search for flights from Ontario Airport to Greenville Airport?
As of October 2026, there are 4 operators available to choose from for flights from Ontario Airport to Greenville Airport.
How old do you have to be to fly from Ontario Airport to Greenville Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Greenville Airport.
What documentation or ID do you need to fly to Greenville Airport?
The necessary travel and health documents for your Greenville Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Ontario to Greenville?
momondo data reveals that the most frequently booked airline on the route from Ontario to Greenville is American Airlines, representing 39% of all bookings. The subsequent popular airlines are Delta at 29%, United Airlines at 18%, and Southwest at 13%.

Best airlines flying from Ontario to Greenville

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $228	Free Cancellation	Rating 7.8 8,651 reviews	Search Delta flights
United Airlines	PriceFrom $273	Free Cancellation	Rating 7.4 10,389 reviews	Search United Airlines flights
American Airlines	PriceFrom $336	Free Cancellation	Rating 7.0 12,179 reviews	Search American Airlines flights
Southwest	PriceFrom $423	Free Cancellation	Rating 7.9 4,210 reviews	Search Southwest flights

Anderson

Greenwood

Simpsonville

Greer

Duncan

Seneca

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Greenville. momondo saves you time and could save you money on your trip.

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

All flight searches from Ontario to Greenville on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Ontario and Greenville by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Price alerts on flights to Greenville from Ontario 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.

An easier way to manage your Greenville trip

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Cheap flights from Ontario to Greenville from $182

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Greenville departing on 12/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from Ontario to Greenville

Our best United Airlines deals on Ontario to Greenville flight tickets

Southwest flights from Ontario to Greenville

Our best Southwest deals on Ontario to Greenville flight tickets

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How to get the cheapest flight ticket from Ontario to Greenville

What is the typical price of a round-trip flight between Ontario and Greenville?

What is the cheapest month to fly to Greenville?

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

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

How have Ontario to Greenville flight prices changed over time?

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

What airlines fly to Greenville?

When to book flights from Ontario to Greenville

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Ontario to Greenville

Best airlines flying from Ontario to Greenville

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

Traveling to a place near Greenville?

Why use momondo?

An easier way to manage your Greenville trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing South Carolina

Fly your favorite airline to Greenville

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Greenville

List of cabin classes available on flights landing in Greenville. Availability may vary depending on flight origin and airline.

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Popular flights according to clicks in the last 7 days on momondo

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