$341 Find Cheap Flights from Ontario to Greece

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 Greece departing on 7/26. 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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Cheap Flights from Ontario to Greece

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Athens
Athens2 stops$777
Thera
Thera2 stops$923
Athens
Athens2 stops$777
Thera
Thera2 stops$923

Book Cheap Ontario to Greece Plane Tickets

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

Tue, Sep 22 - Thu, Oct 8
Delta Logo
7:00 am - 10:55 pm
ONT
-
ATH
29h 55m
2 stops
Delta Logo
6:00 am - 11:16 am
ATH
-
ONT
39h 16m
2 stops
$777Delta
Tue, Sep 22 - Fri, Oct 9
Delta Logo
7:00 am - 10:55 pm
ONT
-
ATH
29h 55m
2 stops
Delta Logo
6:35 am - 4:12 pm
ATH
-
ONT
19h 37m
2 stops
$779Delta
Thu, Aug 20 - Thu, Sep 3
KLM Logo
7:00 am - 10:00 am
ONT
-
ATH
17h 00m
1 stop
KLM Logo
12:10 pm - 9:56 pm
ATH
-
ONT
19h 46m
1 stop
$785KLM
Tue, Apr 21 - Tue, Apr 28
United Airlines Logo
7:00 am - 10:35 am
ONT
-
ATH
17h 35m
1 stop
United Airlines Logo
12:35 pm - 10:31 pm
ATH
-
ONT
19h 56m
1 stop
$787United Airlines
Tue, Sep 22 - Mon, Oct 12
Delta Logo
11:55 am - 10:55 pm
ONT
-
ATH
25h 00m
2 stops
Delta Logo
2:40 pm - 4:12 pm
ATH
-
ONT
35h 32m
2 stops
$792Delta
Tue, May 5 - Thu, May 14
KLM Logo
10:15 pm - 11:00 am
ONT
-
ATH
26h 45m
1 stop
KLM Logo
9:45 am - 9:48 pm
ATH
-
ONT
22h 03m
1 stop
$794KLM
Tue, May 5 - Thu, May 14
Delta Logo
10:15 pm - 1:20 pm
ONT
-
ATH
29h 05m
2 stops
Delta Logo
10:05 am - 9:48 pm
ATH
-
ONT
21h 43m
2 stops
$798Delta
Tue, May 5 - Thu, May 14
Iberia Logo
7:30 am - 12:40 am
ONT
-
ATH
31h 10m
2 stops
Iberia Logo
6:55 am - 11:46 pm
ATH
-
ONT
26h 51m
2 stops
$810Iberia
Wed, May 6 - Wed, May 13
British Airways Logo
4:52 pm - 2:25 am
ONT
-
ATH
23h 33m
2 stops
British Airways Logo
7:00 pm - 6:38 pm
ATH
-
ONT
33h 38m
2 stops
$811British Airways
Sun, Sep 6 - Wed, Sep 30
British Airways Logo
4:54 pm - 2:15 am
ONT
-
ATH
23h 21m
2 stops
British Airways Logo
8:00 pm - 5:48 pm
ATH
-
ONT
31h 48m
2 stops
$812British Airways
Booking Insights

KAYAK's insights & trends for Ontario to Greece flights

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

Which airlines provide the cheapest flights from Ontario to Greece?

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 Ontario to Greece were found on Delta ($777) and KLM ($785).

Find deals

Good to know

Low seasonFebruary
Cheapest flight$341
Best time to beat the crowds with an average 36% drop in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Ontario to Athens

FAQs - booking Greece flights

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

    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 Greece.

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

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

    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 Ontario to Greece 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 Ontario to Greece?

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

Reviews of the top airline flying from Ontario to Greece

 
Need help choosing which airline to fly with from Ontario to Greece? 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.
7.4
United AirlinesOverall score based on 9491 reviews
6.6Food
7.3Comfort
8.1Crew
7.1Entertainment
7.7Boarding
Airline reviews

They delayed the flight from 9:00 to 11:55 At 11:45 they canceled the flight. I paid a premium price for the tickets with poor service

2.0 MediocreDale, Mar 2026
SFO - TPA
Read more United Airlines reviews

They delayed the flight from 9:00 to 11:55 At 11:45 they canceled the flight. I paid a premium price for the tickets with poor service

My flight was canceled a few hours before boarding. I was rebooked on Copa airlines and missed an important meeting .

Business class seats felt very cramped compared to other airlines.

OK, we were delayed and had to de plane and reboard.

The 777’s economy seat’s legroom was more tolerable than expected. I appreciate the reclining mechanism which slides the seat forward to minimize cannibalizing the space behind. The food was terrible: very salty.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

We had turbulence ever 1/2 hr or so and the captains announcements were SOOOO LOUD

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

Information on your arrival and departure airports

Ontario (ONT)