$370 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 8/23. 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
Athens1 stop$814
Thera
Thera2 stops$1,049
Athens
Athens1 stop$814
Thera
Thera2 stops$1,049

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

Sun, Aug 30 - Wed, Sep 16
Delta Logo
7:05 am - 11:00 am
ONT
-
ATH
17h 55m
1 stop
Delta Logo
9:45 am - 9:56 pm
ATH
-
ONT
22h 11m
1 stop
$814Delta
Wed, Aug 12 - Wed, Sep 2
British Airways Logo
7:06 am - 11:45 am
ONT
-
ATH
18h 39m
1 stop
British Airways Logo
2:00 pm - 10:58 pm
ATH
-
ONT
18h 58m
1 stop
$820British Airways
Wed, Oct 7 - Wed, Oct 21
United Airlines Logo
7:00 am - 10:35 am
ONT
-
ATH
17h 35m
1 stop
United Airlines Logo
1:10 pm - 10:59 pm
ATH
-
ONT
43h 49m
2 stops
$824United Airlines
Mon, Sep 14 - Fri, Sep 25
Air Canada Logo
5:00 am - 11:10 am
ONT
-
ATH
20h 10m
2 stops
Air Canada Logo
12:10 pm - 8:52 pm
ATH
-
ONT
42h 42m
2 stops
$833Air Canada
Mon, Sep 14 - Tue, Sep 29
United Airlines Logo
7:00 am - 6:40 pm
ONT
-
ATH
25h 40m
2 stops
United Airlines Logo
1:10 pm - 10:26 pm
ATH
-
ONT
43h 16m
2 stops
$837United Airlines
Sun, Oct 11 - Wed, Oct 21
United Airlines Logo
7:00 am - 10:35 am
ONT
-
ATH
17h 35m
1 stop
United Airlines Logo
12:35 pm - 10:26 pm
ATH
-
ONT
19h 51m
1 stop
$844United Airlines
Tue, Sep 8 - Tue, Sep 29
Turkish Airlines Logo
11:50 pm - 8:45 am
ONT
-
SKG
22h 55m
2 stops
Turkish Airlines Logo
9:15 pm - 8:13 pm
SKG
-
ONT
32h 58m
2 stops
$1,126Turkish Airlines
Tue, Sep 1 - Thu, Sep 10
Turkish Airlines Logo
11:50 pm - 8:45 am
ONT
-
SKG
22h 55m
2 stops
Turkish Airlines Logo
9:35 am - 8:13 pm
SKG
-
ONT
44h 38m
2 stops
$1,235Turkish Airlines
Mon, Aug 24 - Tue, Sep 22
Air Serbia Logo
11:50 pm - 3:25 pm
ONT
-
SKG
29h 35m
2 stops
Air Serbia Logo
4:10 pm - 8:13 pm
SKG
-
ONT
38h 03m
2 stops
$1,454Air Serbia
Sun, Aug 30 - Tue, Sep 22
Air Serbia Logo
11:50 pm - 3:25 pm
ONT
-
SKG
29h 35m
2 stops
Air Serbia Logo
4:10 pm - 8:13 pm
SKG
-
ONT
38h 03m
2 stops
$1,519Air Serbia
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.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Greece, 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 Greece is January, when tickets cost $0 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $1,048 and $823 respectively.

Good to know

Low seasonFebruary
Cheapest flight$370
Best time to beat the crowds with an average 32% drop in price.
Most popular time to fly and prices are also 15% 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 9701 reviews
7.1Entertainment
7.3Comfort
6.6Food
7.7Boarding
8.1Crew
Airline reviews

No screens or meal options. Freezing cold. Dirty seats. Left late.

4.0 OkayMaya, May 2026
SFO - IAH
Read more United Airlines reviews

No screens or meal options. Freezing cold. Dirty seats. Left late.

I liked that my son and I were reseated next to each other (we had different bookings). I liked that it was a directg flight and mostly on time. I liked that you provided pillows and blankets. Flight attendants were generally courteous. The messaging through wifi did not work well. The food was not good. Seats are very narrow and I felt slightly claustraphobic in the window seat.

Some crew were unfriendly or in some cases just straight up rude.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

Flight itself excellent, but delayed so missed connection & got to destination 2 hrs later

Due to cancellation of connecting flight (Lufthansa) I didn’t fly with United

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

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

Information on your arrival and departure airports