$148 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 4/10. 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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Flight Deals

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

Mon, Feb 23 - Thu, Feb 26
Multiple Airlines Logo
8:18 pm - 12:14 am
GSP
-
YYZ
27h 56m
1 stop
Multiple Airlines Logo
7:40 am - 4:23 pm
YYZ
-
GSP
8h 43m
1 stop
$322Multiple Airlines
Thu, Feb 26 - Mon, Mar 2
United Airlines Logo
6:12 am - 1:34 pm
GSP
-
YOW
7h 22m
1 stop
United Airlines Logo
5:48 pm - 11:59 pm
YOW
-
GSP
6h 11m
1 stop
$355United Airlines
Thu, Feb 26 - Mon, Mar 2
United Airlines Logo
6:12 am - 1:34 pm
GSP
-
YOW
7h 22m
1 stop
United Airlines Logo
5:48 pm - 11:59 pm
YOW
-
GSP
6h 11m
1 stop
$356United Airlines
Mon, Feb 23 - Thu, Feb 26
Multiple Airlines Logo
6:22 pm - 8:54 pm
GSP
-
YYZ
26h 32m
2 stops
Multiple Airlines Logo
7:40 am - 4:23 pm
YYZ
-
GSP
8h 43m
1 stop
$357Multiple Airlines
Sun, Mar 29 - Sun, Apr 5
Multiple Airlines Logo
9:46 pm - 12:14 am
GSP
-
YYZ
26h 28m
2 stops
Multiple Airlines Logo
3:40 pm - 5:43 pm
YYZ
-
GSP
26h 03m
1 stop
$364Multiple Airlines
Tue, Mar 10 - Tue, Mar 17
American Airlines Logo
7:07 am - 4:41 pm
GSP
-
YYZ
9h 34m
1 stop
American Airlines Logo
10:58 am - 10:05 pm
YYZ
-
GSP
11h 07m
1 stop
$406American Airlines
Sat, Mar 28 - Sat, Apr 4
Air Canada Logo
6:23 am - 9:56 pm
GSP
-
YOW
15h 33m
1 stop
Air Canada Logo
10:00 am - 2:12 pm
YOW
-
GSP
4h 12m
1 stop
$431Air Canada
Wed, Mar 25 - Fri, Mar 27
American Airlines Logo
7:07 am - 4:41 pm
GSP
-
YYZ
9h 34m
1 stop
American Airlines Logo
10:58 am - 7:07 pm
YYZ
-
GSP
8h 09m
1 stop
$436American Airlines
Thu, Feb 26 - Mon, Mar 2
Air Canada Logo
6:12 am - 5:18 pm
GSP
-
YOW
11h 06m
2 stops
Air Canada Logo
5:48 pm - 11:59 pm
YOW
-
GSP
6h 11m
1 stop
$445Air Canada
Sun, Mar 29 - Sun, Apr 5
Delta Logo
2:30 pm - 12:39 am
GSP
-
YOW
10h 09m
2 stops
Delta Logo
5:40 am - 5:29 pm
YOW
-
GSP
11h 49m
2 stops
$543Delta
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.

Which airlines provide the cheapest flights from Greenville to Ontario?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Greenville to Ontario were found on United Airlines ($355) and American Airlines ($406).

Good to know

Cheapest flight$148
Most popular time to fly with an average 21% increase in price.
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.
7.9
DeltaOverall score based on 8203 reviews
7.2Food
7.9Comfort
7.8Entertainment
8.1Boarding
8.5Crew
Airline reviews

Excellent!!! Aeromexico is a great airline. What was not that good is the service provided by Kayak. It is never clear and not easy to manage.

10.0 ExcellentEdgar Otto Enrique, Feb 2026
BOS - MEX
Read more Delta reviews

Excellent!!! Aeromexico is a great airline. What was not that good is the service provided by Kayak. It is never clear and not easy to manage.

Flight delay was frustrating, also you cannot checkin online without delta app, web browser check-in throw errors

The gate agent was most helpful in getting me on to fly standby. I greatly appreciate it.

bulkhead seat had very little legroom - even in bsiness class.

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Sorry I didn't realize I was writing a review for each leg. Please see my previous review - it applies to the entire flight, not just a single leg.

This is the first time I've been disappointed with Delta. I was called by Delta to see if I would volunteer to change flights since my original flight home was overbooked. I accepted. The modified booking only provided me a 35 minute layover - when you subtract the fact that boarding closes for a flight 15 minutes early, that gave me 20 minutes to run for one end of the airport to the other. I barely made it. On the 2.5 hour flight to Tampa, the crew repeatedly let us know over the intercom that they cannot serve drinks or snacks due to safety/turbulence. I would have accepted this reason if they did not CONTINUALLY SERVE DRINKS AND COOKED FOOD to First class. If safety is the excuse then the entire plane should be strapped in for safety. On top of this the air conditioning vents were not working correctly and the plane was uncomfortably warm. I love Delta and am a loyal Delta traveler, and I have never had an experience like this. I don't know if there's a disconnect between availability among third-party sites like KAYAK and the airlines or what, but when overbooking causes issues like this for travelers it should be reviewed and changes to the booking process should be made. I blame BOTH KAYAK and Delta for this terrible experience.

boarded at 5:30 pm, pushed away from gate at 6pm ... takeoff was not until ~6:45pm; disappointing

Smooth boarding, pleasant and professional lady checking us in. Crew service was excellent, again pleasant, but professional. Nice touch-down on landing! Thank you Delta. 💗

Originally, I was booked in economy. I paid several hundred additional dollars to upgrade to first class. Then I paid several more hundred dollars to change my flight to a slightly earlier flight. I asked if the changed flight would also seat me in first class, and I was told that it would. When I boarded the plane, however, I was seated in economy. So, I paid $500-600 more than I paid for my original ticket for an upgrade and a changed flight - received the changed flight (which was nice), but did not receive the upgrade. So, I was not completely satisfied.

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

United Airlines is my preferred airlines and I am thankful for Gary who also help support me on the phone to switch my flight literally last min.

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

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

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.

Flight was good but there are way to many announcements for credit cards etc.

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.

I was on a small regional flight from Detroit to Philadelphia. When we landed the outside cruise needed to turn something off with the engine, which took quite a long time. Then, when they allowed us to get off the plane it was outside. They took their time, unloading all the luggage and waited till they unloaded all the luggage before they brought it over to us. It was 9 o’clock at night freezing cold out, and there was no proactive hustle to try to get people their luggage. It was really one of the worst experiences I think I’ve ever had with American until a manager came over. I don’t think they were going to even consider pulling the luggage over to the people that had been waiting outside for at least 10 minutes in the freezing cold.

The flight was fine, once we got underway. It was more than hour delayed

Beverage service was not good. Also just one service in 5 hr 30 min flight. No ask fir water ir anything beside one time beverage service.

Waited for oxygen tanks for 30 minutes after boarding was complete.

The seats are too uncomfortable for anyone over 5ft 8in. I'm 5'10" with a back and hip issue and I was in pai for the full duration of the flight.

The flight was on time/early, attentive crew, and everything overall went smoothly. Disappointed that WIFI was not working for the flight.

One day, I do so hope for a gluten free snack! Seems like with the rest of the world FINALLY figuring out what gluten free is, American Airlines would too. Fingers crossed!!

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.

Flight was on time and the meal and service were good.

The accessible bathroom should be visible to people in Economy class.

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

Information on your arrival and departure airports