Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Ontario to Greenville from $177

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 9/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Greenville

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
12:33 pm - 10:17 pm
ONT
-
GSP
6h 44m
1 stop
American Airlines Logo
2:11 pm - 6:53 pm
GSP
-
ONT
7h 42m
1 stop
$368American Airlines
Tue, Sep 8 - Tue, Sep 15
Delta Logo
12:00 pm - 10:59 pm
ONT
-
GSP
7h 59m
1 stop
Delta Logo
6:55 am - 10:42 am
GSP
-
ONT
6h 47m
1 stop
$369Delta
Mon, Aug 17 - Wed, Aug 26
American Airlines Logo
12:43 pm - 10:11 pm
ONT
-
GSP
6h 28m
1 stop
American Airlines Logo
7:46 am - 1:31 pm
GSP
-
ONT
8h 45m
1 stop
$369American Airlines
Sat, Oct 31 - Sat, Nov 7
Delta Logo
10:00 pm - 9:18 am
ONT
-
GSP
8h 18m
1 stop
Delta Logo
6:00 am - 10:42 am
GSP
-
ONT
7h 42m
1 stop
$369Delta
Mon, Aug 17 - Sat, Aug 22
United Airlines Logo
5:00 am - 3:03 pm
ONT
-
GSP
7h 03m
1 stop
United Airlines Logo
10:26 am - 6:47 pm
GSP
-
ONT
11h 21m
2 stops
$374United Airlines
Sat, Oct 31 - Sat, Nov 7
United Airlines Logo
9:25 am - 10:59 pm
ONT
-
GSP
10h 34m
2 stops
United Airlines Logo
1:56 pm - 8:51 pm
GSP
-
ONT
9h 55m
2 stops
$380United Airlines
Sat, Oct 31 - Sat, Nov 7
Southwest Logo
8:30 am - 8:55 pm
ONT
-
GSP
9h 25m
2 stops
Southwest Logo
7:00 am - 2:05 pm
GSP
-
ONT
10h 05m
2 stops
$384Southwest
Tue, Aug 18 - Tue, Aug 25
Southwest Logo
11:55 pm - 12:25 pm
ONT
-
GSP
9h 30m
2 stops
Southwest Logo
7:00 am - 2:05 pm
GSP
-
ONT
10h 05m
2 stops
$411Southwest
Tue, Sep 8 - Tue, Sep 15
Alaska Airlines Logo
6:56 pm - 11:08 am
ONT
-
GSP
13h 12m
2 stops
Alaska Airlines Logo
6:01 am - 6:00 pm
GSP
-
ONT
14h 59m
2 stops
$789Alaska Airlines
Thu, Oct 15 - Sat, Oct 17
Alaska Airlines Logo
6:02 am - 11:25 pm
ONT
-
GSP
14h 23m
2 stops
Alaska Airlines Logo
11:42 am - 10:54 pm
GSP
-
ONT
14h 12m
2 stops
$1,002Alaska Airlines
Thu, Aug 13 - Wed, Nov 18

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

American Airlines flights from Ontario to Greenville

Our best American Airlines deals on Ontario to Greenville flight tickets
American Airlines
Sep 8
ONT12:33 pmOntario
6h 44m
1 stop
GSP10:17 pmGreenville
Sep 15
GSP2:11 pmGreenville
7h 42m
1 stop
ONT6:53 pmOntario
$368
American Airlines
Aug 17
ONT10:29 amOntario
8h 48m
1 stop
GSP10:17 pmGreenville
Aug 22
GSP7:00 amGreenville
14h 15m
2 stops
ONT6:15 pmOntario
$383
American Airlines
Aug 22
ONT6:15 amOntario
13h 02m
2 stops
GSP10:17 pmGreenville
Aug 25
GSP7:00 amGreenville
14h 15m
2 stops
ONT6:15 pmOntario
$397

United Airlines flights from Ontario to Greenville

Our best United Airlines deals on Ontario to Greenville flight tickets
United Airlines
Oct 31
ONT5:00 amOntario
7h 03m
1 stop
GSP3:03 pmGreenville
Nov 7
GSP10:26 amGreenville
11h 21m
2 stops
ONT6:47 pmOntario
$374
United Airlines
Oct 31
ONT9:25 amOntario
10h 34m
2 stops
GSP10:59 pmGreenville
Nov 7
GSP1:56 pmGreenville
9h 55m
2 stops
ONT8:51 pmOntario
$380
United Airlines
Aug 19
ONT5:00 amOntario
6h 48m
1 stop
GSP2:48 pmGreenville
Aug 24
GSP5:43 pmGreenville
7h 52m
1 stop
ONT10:35 pmOntario
$479

momondo Fare Finder

 
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, momondo users made 832,500 searches. Data last updated July 30, 2026.
Use the filters below to find and compare flights from Ontario to Greenville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Tue 9/8

12:33 pm-10:17 pm

1 stop6h 44m

Greenville

Tue 9/15

2:11 pm-6:53 pm

1 stop7h 42m

$368

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Mon 8/17

12:00 pm-10:59 pm

1 stop7h 59m

Greenville

Wed 8/26

6:55 am-10:42 am

1 stop6h 47m

$369

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Sat 10/31

12:43 pm-10:11 pm

1 stop6h 28m

Greenville

Sat 11/7

7:46 am-1:31 pm

1 stop8h 45m

$369

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Mon 8/17

10:00 pm-9:18 am

1 stop8h 18m

Greenville

Sat 8/22

6:00 am-10:42 am

1 stop7h 42m

$369

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Sat 10/31

5:00 am-3:03 pm

1 stop7h 03m

Greenville

Sat 11/7

10:26 am-6:47 pm

2 stops11h 21m

$374

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Sat 10/31

9:25 am-10:59 pm

2 stops10h 34m

Greenville

Sat 11/7

1:56 pm-8:51 pm

2 stops9h 55m

$380

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Tue 8/18

8:30 am-8:55 pm

2 stops9h 25m

Greenville

Tue 8/25

7:00 am-2:05 pm

2 stops10h 05m

$384

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Tue 9/8

11:55 pm-12:25 pm

2 stops9h 30m

Greenville

Tue 9/15

7:00 am-2:05 pm

2 stops10h 05m

$411

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Thu 10/15

6:56 pm-11:08 am

2 stops13h 12m

Greenville

Sat 10/17

6:01 am-6:00 pm

2 stops14h 59m

$789

OntarioGreenville

ONT - GSP

ONTGSP

Ontario

Thu 8/13

6:02 am-11:25 pm

2 stops14h 23m

Greenville

Wed 11/18

11:42 am-10:54 pm

2 stops14h 12m

$1,002

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Greenville from

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

What is the cheapest month to fly to Greenville?

The month of April is another great option to travel to Greenville, with average flight prices from Ontario averaging around $423.

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 $125. 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 Monday because tickets tend to average around $345. 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 $295. Flights to Greenville are more costly at noon, with an average ticket price of $306. 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?

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

Fastest flight time

6h 48m

Direct flights

None
The fastest flight from Ontario to Greenville takes 6h 48m
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 48m.

  • 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?

  • 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?

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
DeltaPriceFrom $228Free CancellationRating
7.8
8,487 reviews
Search Delta flights
United AirlinesPriceFrom $273Free CancellationRating
7.4
10,046 reviews
Search United Airlines flights
American AirlinesPriceFrom $312Free CancellationRating
7.1
11,841 reviews
Search American Airlines flights
SouthwestPriceFrom $319Free CancellationRating
8.0
4,227 reviews
Search Southwest flights

Traveling to a place near Greenville?

Book flights to Greenville if you plan to visit one of these locations
Anderson
Simpsonville
Greenwood
Greer
Seneca
Duncan

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

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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 8/29
Sat 9/5
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States