ONT - GSO

$149 Find Cheap Flights from Ontario to Greensboro

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Greensboro departing on 5/31. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Greensboro, 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 Ontario to Greensboro, as well as popular online travel agencies
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Cheap Flights from Ontario to Greensboro

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Greensboro 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.

Recent round-trip flight deals from Ontario to Greensboro

KAYAK's recommended round-trip deals from the most popular airlines that fly from Ontario to Greensboro.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
Delta Logo
10:05 pm - 9:36 amONT-GSO
8h 31m1 stop
Delta Logo
5:15 pm - 10:29 pmGSO-ONT
8h 14m1 stop
$309Delta
Find Deal
Mon, Jun 30 - Fri, Jul 11
American Airlines Logo
12:45 pm - 10:28 pmONT-GSO
6h 43m1 stop
American Airlines Logo
2:59 pm - 9:58 pmGSO-ONT
9h 59m2 stops
$314American Airlines
Find Deal
Thu, May 29 - Tue, Jun 3
Delta Logo
10:05 pm - 9:36 amONT-GSO
8h 31m1 stop
Delta Logo
6:55 pm - 10:29 pmGSO-ONT
6h 34m1 stop
$366Delta
Find Deal
Mon, Jun 30 - Mon, Jul 7
American Airlines Logo
6:15 am - 4:49 pmONT-GSO
7h 34m1 stop
American Airlines Logo
2:59 pm - 9:05 pmGSO-ONT
9h 06m1 stop
$369American Airlines
Find Deal
Wed, May 7 - Mon, May 12
Delta Logo
10:05 pm - 9:36 amONT-GSO
8h 31m1 stop
Delta Logo
6:55 am - 11:07 amGSO-ONT
7h 12m1 stop
$374Delta
Find Deal
Sun, Jun 29 - Tue, Jul 8
American Airlines Logo
7:05 pm - 8:33 amONT-GSO
10h 28m2 stops
American Airlines Logo
5:39 am - 12:00 pmGSO-ONT
9h 21m2 stops
$384American Airlines
Find Deal
Mon, Jul 21 - Tue, Jul 29
United Airlines Logo
6:00 am - 10:55 pmONT-GSO
13h 55m2 stops
United Airlines Logo
5:32 pm - 10:26 pmGSO-ONT
7h 54m1 stop
$414United Airlines
Find Deal
Wed, May 14 - Wed, May 28
United Airlines Logo
6:00 am - 10:55 pmONT-GSO
13h 55m2 stops
United Airlines Logo
10:33 am - 9:10 pmGSO-ONT
13h 37m2 stops
$419United Airlines
Find Deal
Wed, May 14 - Wed, May 28
Alaska Airlines Logo
7:30 am - 10:28 pmONT-GSO
11h 58m2 stops
Alaska Airlines Logo
6:25 am - 3:50 pmGSO-ONT
12h 25m2 stops
$651Alaska Airlines
Find Deal
Thu, May 29 - Tue, Jun 3
Alaska Airlines Logo
7:17 pm - 10:56 amONT-GSO
12h 39m2 stops
Alaska Airlines Logo
12:02 pm - 11:59 pmGSO-ONT
14h 57m2 stops
$658Alaska Airlines
Find Deal
Fri, Sep 19 - Sun, Sep 21

KAYAK's insights & trends for Ontario to Greensboro flights

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

What’s the cheapest day of the week to fly from Ontario to Greensboro?

The average price of all round-trip flights from Ontario to Greensboro clicked on KAYAK for each day over the last 12 months.
When flying from Ontario to Greensboro, you should consider leaving on a Wednesday and avoid Thursdays if you are looking for the best rates. For your return to Ontario, you’ll find the best rates on Thursdays and the most expensive ones on Saturdays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Greensboro, 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 Ontario to Greensboro is November, where tickets cost $338 (return) on average. On the other hand, the most expensive months are December and September, where the average cost of round-trip tickets is $673 and $558 respectively.

How far in advance should I book a flight from Ontario to Greensboro?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Greensboro, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.
To get a below average price on the flight from Ontario to Greensboro, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

Good to know

Low season

January

High season

August

Cheapest flight

$149
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly and prices are also 16% lower on average.
Flight from Ontario to Greensboro

When to book flights from Ontario to Greensboro

Are your dates flexible? Find out the best times to travel from Ontario to Greensboro 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 Ontario to Greensboro

  • What is the cheapest flight from Ontario to Greensboro?

    In the last 3 days, the lowest price for a flight from Ontario to Greensboro was $149 for a one-way ticket and $309 for a round-trip.

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

    No, a passport isn't needed to fly from Ontario to Greensboro. However, local authorities might ask for an official ID.

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

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

  • Which airline alliances offer flights from Ontario to Greensboro?

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

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

    The two airlines most popular with KAYAK users for flights from Ontario to Greensboro are Delta and American Airlines. With an average price for the route of $422 and an overall rating of 8.0, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $443 and an overall rating of 7.2.

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

    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 Ontario to Greensboro.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Greensboro from 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 Ontario to Greensboro?

    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 Greensboro with an airline and back to Ontario with another airline. Booking your flights between Ontario and GSO 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 Ontario to Greensboro?

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

See more FAQs

Top airlines flying from Ontario to Greensboro

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Greensboro. 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 Ontario to Greensboro? 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.
8.0
DeltaOverall score based on 7920 reviews
8.2Boarding
8.5Crew
7.9Entertainment
7.9Comfort
7.3Food
Airline reviews

Delta flight was on time, seats were comfortable, and crew was nice.

8.0 ExcellentAnonymous, Apr 2025LAX - DEN
Read more Delta reviews

Delta flight was on time, seats were comfortable, and crew was nice.

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

Customer service at the gate in the flight was exceptional. On time. Aircraft and seat was decent. Thanks Delta. 💗

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

New boarding doesn't make sense. Filling front first is slow.

Delta flight was great from the check in all the way to arrival. However, I had a very bad experience. I requested a wheelchair and the wheelchair employee that went to pick me up from the plane in Boston to bring me to the baggage claims told me I have to pay him. I was under the impression that it was a free service and I usually give tips but the person forced me to pay and since I said no because I was upset with his demand when my daughter walked in to pick me up he demanded payment from my daughter who paid him thinking maybe now it is a charged service.

Horrible. Grateful to be alive but spent 13 hours at airport only to return back to my familys house and flight changed to next day. They tried to fix a part on plane, had no back up plane and after 10 hours , reattempted the flight and it STILL wasn't fixed. We got a meal voucher and rescheduled flight but there should be some other compensation for the 15 hours spent in airport

We missed our flight. The boarding pass had the wrong gate and by the time we received the text from Kayak, our flight was already gone. I’ll never use Kayak again and will go direct to the airlines in the future.

There were five broken seats on the plane. The crew was very rude in telling people they had to get off the plane and get a flight the next day. No call for volunteers, but telling people they had to get off. One woman was flying with her elderly mother and daughter and was told she had to leave or all three had to leave. Fortunately, a volunteer offered to stay. The situation was handled poorly.

They lost my luggage and it didn’t get delivered until the next day.

3 hours late. Not even water offered on a 2.25 hour flight.

I have long legs, my foot was out in the aisle and when a flight attendant came walking by and I didn't notice, instead of saying "excuse me" or anything like that, she kicked my foot. Extremely rude

Cabin was roomy enough to easily slide my carry on under the seat in front of me!

Good experience but the snacks are not gluten free, so I cannot eat them.

I didn’t like anything, being platinum pro get you absolutely nowhere and does not increase the customer service treatment whatsoever anymore. My flight was canceled and they put me on a flight eight hours later that would’ve got me back in the middle of the night. They could’ve easily move me up to an hour Prior on an earlier flight. My second flight was unreasonable to take, the third flight was also canceled due to mechanical issues like the first flight. I don’t know what’s going on with American, but they are falling apart, after seven flight changes I finally got home, Unreasonable.

They have lost any customer service care and support. Terrible airline now and been for awhile.

The flight was delayed leaving Miami. When we arrived in Charlotte, we were unable to park at our scheduled gate. We had to wait another 30-45 minutes before we could park at a different gate. All in all, we were delayed by almost two hours arriving in Charlotte.

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

Information on your arrival and departure airports

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