$178 Find Cheap Flights from Greenville to Ontario - Compare and Save

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 7/13. 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

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Book Cheap Greenville to Ontario Plane Tickets

 
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

Sun, Aug 23 - Mon, Aug 31
Multiple Airlines Logo
8:37 am - 5:09 pm
GSP
-
YYZ
32h 32m
2 stops
Multiple Airlines Logo
9:30 am - 4:44 pm
YYZ
-
GSP
7h 14m
1 stop
$308Multiple Airlines
Sun, Aug 23 - Mon, Aug 31
Multiple Airlines Logo
8:37 am - 5:09 pm
GSP
-
YYZ
32h 32m
2 stops
Multiple Airlines Logo
9:30 am - 4:44 pm
YYZ
-
GSP
7h 14m
1 stop
$313Multiple Airlines
Wed, Jul 29 - Mon, Aug 3
United Airlines Logo
6:10 am - 1:59 pm
GSP
-
YOW
7h 49m
1 stop
United Airlines Logo
3:10 pm - 11:00 pm
YOW
-
GSP
7h 50m
1 stop
$603United Airlines
Thu, Aug 13 - Thu, Aug 20
United Airlines Logo
7:47 pm - 11:54 pm
GSP
-
YOW
4h 07m
1 stop
United Airlines Logo
6:00 am - 5:02 pm
YOW
-
GSP
11h 02m
3 stops
$613United Airlines
Thu, Dec 24 - Thu, Dec 24
American Airlines Logo
8:00 am - 1:46 pm
GSP
-
YUL
5h 46m
1 stop
American Airlines Logo
3:59 pm - 8:39 pm
YUL
-
GSP
4h 40m
1 stop
$630American Airlines
Sat, Oct 31 - Mon, Nov 2
Delta Logo
3:42 pm - 11:59 pm
GSP
-
YUL
8h 17m
1 stop
Delta Logo
9:28 am - 5:30 pm
YUL
-
GSP
8h 02m
1 stop
$638Delta
Sat, Oct 31 - Mon, Nov 2
American Airlines Logo
8:59 am - 3:27 pm
GSP
-
YUL
6h 28m
2 stops
American Airlines Logo
3:59 pm - 8:54 pm
YUL
-
GSP
4h 55m
1 stop
$648American Airlines
Sat, Oct 31 - Mon, Nov 2
Delta Logo
6:00 am - 1:36 pm
GSP
-
YUL
7h 36m
1 stop
Delta Logo
9:28 am - 5:30 pm
YUL
-
GSP
8h 02m
1 stop
$662Delta
Wed, Jul 29 - Mon, Aug 3
Air Canada Logo
6:10 am - 3:10 pm
GSP
-
YOW
9h 00m
2 stops
Air Canada Logo
3:10 pm - 11:00 pm
YOW
-
GSP
7h 50m
1 stop
$702Air Canada
Fri, Jul 31 - Sat, Aug 8
Air Canada Logo
7:40 pm - 11:54 pm
GSP
-
YOW
4h 14m
1 stop
Air Canada Logo
7:00 am - 5:00 pm
YOW
-
GSP
10h 00m
2 stops
$729Air Canada
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.

What is the cheapest month to fly from Greenville to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Greenville to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Greenville to Ontario is May, when tickets cost $0 (return) on average. On the other hand, the most expensive months are September and March, when the average cost of round-trip tickets is $947 and $737 respectively.

Good to know

Cheapest flight$178
Flight from Greenville to Toronto

FAQs - booking Ontario flights

  • 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 from Greenville to Ontario 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 from Greenville to Ontario with an airline and back with another airline.

  • 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 from Greenville to Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving 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.
7.8
DeltaOverall score based on 8453 reviews
8.5Crew
7.8Comfort
7.8Entertainment
8.1Boarding
7.2Food
Airline reviews

This wasn't my experience with Delta. It was just the Pegasus flight. Seats were very hard. Staff was kinda rough. Not very nice. Charged me for snacks. For a 4 hour flight I would've expected more.

4.0 OkayAnonymous, Apr 2026
MYR - ATL
Read more Delta reviews

This wasn't my experience with Delta. It was just the Pegasus flight. Seats were very hard. Staff was kinda rough. Not very nice. Charged me for snacks. For a 4 hour flight I would've expected more.

I had a flight cancel and had it rerouted. When the rerouted they put me at a window seat instead of an isle. It was hard sitting by the window because the couple with masks on were making out. I get motion sickness which is why I need to have the isle seat.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

After a 5 hour delay waiting at the gate (3 delays adding up) with no clear reason provided, we finally boarded flew 3/4 of the way to Toronto then were turned back to New York. As we neared New York, the pilot declared that it was his fault, something to do with timing and him not being allowed into the country???? How could the airline let his happen? They had hours to prepare and make sure they had a crew available for the flight! We ended up in Toronto a day late with no sleep.

The plane was old with small storage areas that had problems closing/latching and not enough storage for everyone, and worn, damaged seats. Service was great but feel a little unsafe on such well used planes.

Rode in a smaller plane and short trip meant no snacks, no free wifi or tv. It was only 30min flight so honestly wasn’t a big deal to lack these items.

We were forced to wait nearly 50 additional minutes before leaving the terminal.

I appreciated friendly service from check-in, to boarding, to in-flight amenities! Attendants were accommodating and helpful. Thank you! Elaine

I just can’t understand why are you sell to many tickets ???? We had to wait 2 hours before 13 people from our flight take money and go to next day flight!

The only real hiccups in the flight were things beyond Delta’s control - turbulence which delayed food service and a departure delay caused by some VIP plane which stopped all departures and landings for 30 minutes - and was never explained to us by the crew. Otherwise good flight. I would fly Delta again.

Even through the flight was delayed due to storms near IAH The flight was great! The crew was so hospitable and professional

Entertainment kept turning itself off. Gave up on watching a movie.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Not United Airlines' fault. It's ORL airport's fault.

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

Very nice flight love the small aircraft. We had a wonderful flight attendant. Nice to see someone that really enjoys her job. Don't have her name but had a southern accent.

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

Not the fault of United—weather, reroute around weather, time sitting on tarmac, arrived couple hours late, too late for train into city necessitating a much pricier cab but weather…can’t be helped.

I had no checked baggage but was required to hand over carry on baggage at the door of the plane. There was a lot of overboard space in the plane and I was one of the last ones. I ran to get my carry on but it was gone. I was given back at the plane door in Toronto, so the wait was not as long as it would have been at the carousel.

The flight and boarding were easy peasy. I was traveling with my 4-year-old, so a smooth boarding experience was especially appreciated. My only piece of feedback is really about where our gate was in O'Hare. They've shoved four gates into a tiny corner of the B terminal and there isn't early enough room or seating for everyone. Not United's problem, but did dent the overall experience.

Very good I can’t complain one bit. Thank you American Airlines for making my flight enjoyable and safe!

Flight was fine, but not having WiFi was a major negative

Everything was excellent and I enjoyed myself. Thank for everything

One of our group members was struggling to walk. In Charlotte we asked for a wheelchair and she was accompanied by Desmond. I was impressed by his patience and attention. In Boston she received the same service. I didn’t get the name of the helper but she went above and beyond in assisting us. A great AA service

I was trying to take 2 one and a half hour one way trips and I experienced almost 20 delays over the course of those two trips. Only a few of them were due to weather the rest was disorganization

Flight was late and boarding was confusing because gate changed and I didn’t get a notification

Was a normal flight but it was delayed, and there wasn't an explanation.

Would have thought that they would gas up plane before everyone got on board

When my flight was delayed due to weather, I was rebooked to another flight since it showed that I would miss my connection. It was a lot of work to get back onto my originally connecting flight which was also delayed. That part caused a lot of stress and frustration. The ticketing agent at the desk was not very helpful.

Boarding was disorganized and delayed because they overbooked and wanted people to give up seats then further delayed due to an issue with the plane. They did not load my bag and it took a day for them to return it. Flight attendant was lovely and the only positive thing about this trip.

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

Information on your arrival and departure airports