GSP - ONT

$184 Find Cheap Flights from Greenville to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Greenville to Ontario departing on 5/28. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Greenville to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Greenville to Ontario, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$383
Typical prices: $727-$574
Delta
Wed 4/29Tue 5/19
GSP - ONT • 1 stop
Cheapest one-way
$184
Typical prices: $219-$278
Multiple Airlines
Thu 5/28
GSP - ONT • 2 stops
Top airlines
Cheapest • from $383 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Greenville and Ontario. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $507 (round-trip)
Shortest trip • 6h 55m (one-way)
Insights
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Greenville to Ontario (GSP-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Greenville to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Greenville to Ontario

Wed, Apr 29 - Tue, May 19
Delta Logo
5:42 am - 11:36 am
GSP
-
ONT
8h 54m
1 stop
Delta Logo
10:00 pm - 9:04 am
ONT
-
GSP
8h 04m
1 stop
$383Delta
Wed, Jun 10 - Tue, Jun 16
United Airlines Logo
5:41 pm - 10:46 pm
GSP
-
ONT
8h 05m
1 stop
United Airlines Logo
6:30 pm - 9:55 am
ONT
-
GSP
12h 25m
2 stops
$388United Airlines
Tue, May 12 - Tue, Aug 11
Southwest Logo
1:55 pm - 9:50 pm
GSP
-
ONT
10h 55m
2 stops
Southwest Logo
8:25 am - 8:55 pm
ONT
-
GSP
9h 30m
2 stops
$393Southwest
Thu, Apr 30 - Wed, May 6
Delta Logo
5:42 am - 11:36 am
GSP
-
ONT
8h 54m
1 stop
Delta Logo
10:15 pm - 9:04 am
ONT
-
GSP
7h 49m
1 stop
$396Delta
Sat, May 16 - Tue, May 19
Delta Logo
5:40 am - 10:57 am
GSP
-
ONT
8h 17m
1 stop
Delta Logo
9:50 am - 11:43 pm
ONT
-
GSP
10h 53m
2 stops
$401Delta
Sat, May 16 - Sat, May 16
Delta Logo
5:40 am - 10:57 am
GSP
-
ONT
8h 17m
1 stop
Delta Logo
10:00 pm - 9:04 am
ONT
-
GSP
8h 04m
1 stop
$409Delta
Thu, Apr 30 - Mon, May 4
Delta Logo
6:51 am - 11:36 am
GSP
-
ONT
7h 45m
1 stop
Delta Logo
5:55 pm - 9:09 am
ONT
-
GSP
12h 14m
2 stops
$414Delta
Thu, Jun 4 - Mon, Jun 8
Southwest Logo
12:55 pm - 4:00 pm
GSP
-
ONT
6h 05m
1 stop
Southwest Logo
9:40 pm - 12:15 pm
ONT
-
GSP
11h 35m
2 stops
$420Southwest
Wed, Apr 29 - Mon, May 18
Delta Logo
6:51 am - 11:36 am
GSP
-
ONT
7h 45m
1 stop
Delta Logo
10:00 pm - 9:04 am
ONT
-
GSP
8h 04m
1 stop
$421Delta
Thu, Jun 4 - Mon, Jun 8
Southwest Logo
12:55 pm - 6:55 pm
GSP
-
ONT
9h 00m
2 stops
Southwest Logo
9:40 pm - 12:15 pm
ONT
-
GSP
11h 35m
2 stops
$425Southwest
Booking Insights

KAYAK's insights & trends for Greenville to Ontario flights

Get data-powered insights and trends into flights from Greenville to Ontario to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Greenville to Ontario?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Greenville to Ontario departing in April.

Good to know

Cheapest flight$184
Most popular time to fly and prices are also 5% lower on average.
Flight from Greenville to Ontario

When to book flights from Greenville to Ontario

Are your dates flexible? Find out the best times to travel from Greenville to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Greenville to Ontario

  • What is the cheapest flight from Greenville to Ontario?

    In the last 3 days, the lowest price for a flight from Greenville to Ontario was $184 for a one-way ticket and $383 for a round-trip.

  • Do I need a passport to fly between Greenville and Ontario?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which aircraft models fly most regularly from Greenville to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Greenville to Ontario?

    oneworld, and SkyTeam are the airline alliances operating flights between Greenville and Ontario, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Greenville to Ontario, Delta or American Airlines?

    The two airlines most popular with KAYAK users for flights from Greenville to Ontario are Delta and American Airlines. With an average price for the route of $434 and an overall rating of 7.9, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $459 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Greenville to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Greenville to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Greenville to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Greenville is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Greenville to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Greenville with another airline. Booking your flights between Greenville and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Greenville to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Greenville up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Greenville to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Greenville to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Greenville to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8399 reviews
8.1Boarding
8.5Crew
7.8Entertainment
7.9Comfort
7.2Food
Airline reviews

WiFi didn’t work most of the time. The usb chargers would work only occasionally for 5 mins and wouldn’t charge after that. Had to keep trying repeatedly at each of the seats in the row.

6.0 GoodLakshmi, Apr 2026
JFK - SFO
Read more Delta reviews

WiFi didn’t work most of the time. The usb chargers would work only occasionally for 5 mins and wouldn’t charge after that. Had to keep trying repeatedly at each of the seats in the row.

The crew bent over backwards to thank us for flying and make us comfortable. The food service was quick and efficient. The Captain communicated and said goodbye and thank you as we departed. They really stood out!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

my mom urmila patel needed a wheelchair which was not available on the curbside. she needed to walk almost 50 meters inside (at the risk of falling) and then had to wait in line to get a wheelchair (this is not ok). Once obtained she had to seat in it for 30-45 minutes for someone to take her in thru the checkin process (which was fairly smooth and easy). the lady who helped her with her checkin process was very courteous and helpful

Staff at the check-in counter were friendly, happy and helpful. They tagged our bags and sent us to “bag drop off” but were not very clear about where that was. The airport was busy we headed off in what we thought was the right direction until a gentleman waved us down and actually came after us. He was the baggage handler for Delta and recognized our “deer in the headlights “ look-he brought us to the right area (which was marked as the Southwest Airlines Drop Off) and sent us on our way. Wonderful guy, low key and working with a big smile on his face. Loved it. Loved him.

Arlene was a great flight attendant. I also liked how one of the other flight attendants gave us a heads up about snacks and asked everyone to remove their headphones when it was their turn to order. Good idea.

I haven’t flown economy in over 20 years but it was not bad. Room by my feet for my bag and seat was roomy enough. Surprised in a good way.

The cabin temperature was nice and cool. The wifi was not working.

As previously noted, this flight was great: departure was timely, the crew was friendly and attentive, and wifi connectivity was seamless. In particular, I appreciated that the flight attendant just told me to stow the laptop right before takeoff/landing, and trusted me to do so (which I did!).

Left a few minutes early. Got in 15 minutes early. Very attentive service on board. Very organized boarding.

Going non stop to lax like I paid for. Not stopping in MCI for gas. Too long of delays

Delayed for mechanical and no updates on what was happening and how long the delay might be.

A first class seat should fit a fat person, and this doesn't. The trays in the armrest are less functional than an ordinary tray in the back of the seat.

The experience at checkin for my American Airlines flight from Sacramento to LAX was very good including the assistance I received in getting my bags checked in and boarding passes printed. Was pleasantly surprised the my bags were checked through all the way to my destination at Clark International Airport in Angeles, Philippines.

Smooth flight. From the early boarding and all were on board before departure time and arrived early in ONT. Great crew. Thank you!!!!

The flight was significantly delayed for 6.5 hours because of snow. There was no communication once the plane returned to the gate regarding when the flight would resume. Other flights were departing while our flight was being unloaded for reasons unknown. Our flight also seemed out of the queue regarding further deicing, refueling, and waiting to Taxi to the runway.

They are always late and seats was also not having working charger

did not have enough meal for first class passengers so offer us snack

Amazing I love American. I’ll never fly anyone else if I can help it.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

Everything you need to know for your flight from Greenville to Ontario

Information on your arrival and departure airports