HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Greece

$317+ Cheap flights from Ontario (ONT) to Greece

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Jul 20 — Jul 271
Mon 7/20
Mon 7/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Greece with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Greece

Cheapest flights from Ontario to Greece
Explore the most affordable flight options available from Ontario to Greece. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 20, 2026.

This Iberia deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/197:00 am
ONT
-
ATH
1 stop18h 45m
Iberia
Thu 9/32:05 pm
ATH
-
ONT
1 stop18h 54m
Iberia
Deal found 6/19$782
This Delta deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:05 am
ONT
-
ATH
1 stop16h 55m
Delta
Thu 9/176:00 am
ATH
-
ONT
2 stops21h 20m
Delta
Deal found 6/16$786
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/191:50 pm
ONT
-
ATH
3 stops35h 20m
United Airlines
Thu 9/312:35 pm
ATH
-
ONT
1 stop20h 00m
United Airlines
Deal found 6/19$790
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/211:50 pm
ONT
-
ATH
2 stops34h 45m
United Airlines
Thu 9/312:35 pm
ATH
-
ONT
1 stop20h 00m
United Airlines
Deal found 6/19$792
This Travelocity deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/222:43 pm
ONT
-
ATH
1 stop35h 02m
British Airways
Fri 9/42:00 pm
ATH
-
ONT
1 stop29h 34m
British Airways
Deal found 6/16$793
This Travelocity deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/222:43 pm
ONT
-
ATH
1 stop35h 02m
Iberia
Fri 9/46:55 am
ATH
-
ONT
2 stops26h 04m
Iberia
Deal found 6/16$795
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/147:00 am
ONT
-
ATH
1 stop17h 35m
United Airlines
Wed 10/211:10 pm
ATH
-
ONT
2 stops41h 48m
United Airlines
Deal found 6/19$800
This Trip.com deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/267:05 am
ONT
-
ATH
1 stop18h 40m
Iberia
Wed 9/22:00 pm
ATH
-
ONT
1 stop18h 59m
Iberia
Deal found 6/19$803
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/147:00 am
ONT
-
ATH
1 stop17h 35m
United Airlines
Fri 10/2312:10 pm
ATH
-
ONT
2 stops44h 39m
United Airlines
Deal found 6/19$805
This Turkish Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/811:24 pm
ONT
-
SKG
2 stops23h 21m
Turkish Airlines
Fri 9/189:35 am
SKG
-
ONT
2 stops44h 38m
Turkish Airlines
Deal found 6/19$1,163
This Ovago deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:00 am
ONT
-
SKG
2 stops43h 40m
Multiple Airlines
Tue 7/1410:35 am
SKG
-
ONT
2 stops22h 16m
Multiple Airlines
Deal found 6/17$1,271
This Turkish Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:24 pm
ONT
-
SKG
2 stops23h 21m
Turkish Airlines
Mon 9/149:15 pm
SKG
-
ONT
2 stops56h 58m
Turkish Airlines
Deal found 6/15$1,273

Find flight deals from Ontario to Greece

Keep the following information in mind while searching for Ontario to Greece flight deals. Data was last updated June 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$782
(Iberia)

One-way from

$317
(oojo)

Popular in

June

Cheapest in

February

Average price

$1,259
Provider with most accurate pricing for Los Angeles-Athens Eleftherios V. flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Athens Eleftherios V. flights.
Search Deals
From Ontario to Greece
Search Deals
One-way flight from Ontario to Greece
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($283 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Greece that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 20, 2026.
Use the filters below to find and compare flights from Ontario to Greece that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 11/21

1:33 pm-9:05 pm

2 stops45h 32m

Athens Eleftherios V.

Wed 11/25

1:00 pm-10:26 pm

2 stops43h 26m

$825

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 11/24

1:00 pm-1:25 am

2 stops26h 25m

Athens Eleftherios V.

Fri 11/27

6:40 am-5:47 pm

2 stops21h 07m

$836

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 11/21

1:00 pm-4:35 pm

2 stops41h 35m

Athens Eleftherios V.

Fri 11/27

6:05 am-4:12 pm

2 stops20h 07m

$838

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 8/22

1:56 pm-10:35 am

2 stops34h 39m

Athens Eleftherios V.

Fri 9/4

12:10 pm-8:01 pm

2 stops41h 51m

$841

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 8/11

7:05 am-11:45 am

1 stop18h 40m

Athens Eleftherios V.

Wed 8/19

2:00 pm-10:59 pm

1 stop18h 59m

$853

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 9/29

7:00 am-10:35 am

1 stop17h 35m

Athens Eleftherios V.

Sat 10/10

6:25 am-10:49 pm

2 stops26h 24m

$878

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 8/14

7:05 am-11:00 am

1 stop17h 55m

Athens Eleftherios V.

Thu 8/27

12:10 pm-9:52 pm

1 stop19h 42m

$887

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 12/3

6:53 pm-1:25 am

2 stops20h 32m

Athens Eleftherios V.

Sun 12/13

12:50 pm-11:06 pm

2 stops20h 16m

$938

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 11/23

6:53 pm-1:25 am

2 stops20h 32m

Athens Eleftherios V.

Sat 11/28

12:50 pm-11:06 pm

2 stops20h 16m

$966

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 8/18

7:00 am-10:35 am

1 stop17h 35m

Athens Eleftherios V.

Tue 10/27

6:40 am-5:47 pm

2 stops20h 07m

$1,054

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/17

Showing 1-10 of 37 resultsSorted by cheapest first
1
2
3
4

Best time to book a flight from Ontario to Greece

Have a flexible travel schedule? Discover the best time to fly to Greece from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Greece
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Greece. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Greece?

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Greece. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

  • How long is the flight from Ontario to Greece?

    A quick flight from Ontario to Greece can take about 16h 55m. KLM provides one of the quickest options available for as low as $786. The distance from Ontario to Greece is about 6879 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Ontario to Greece that include hotel bookings?

    Yes. In addition to deals on Ontario to Greece flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Greece?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Greece.

  • Can I find deals for business class flights from Ontario to Greece?

    Yes. Cheapflights offers flight deals from Ontario to Greece by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Greece

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Heathrow flights
Los Angeles to Charles de Gaulle flights
Los Angeles to Leonardo da Vinci/Fiumicino flights
San Francisco to Heathrow flights
San Francisco to Charles de Gaulle flights
San Francisco to Leonardo da Vinci/Fiumicino flights
San Francisco to Barcelona-El Prat flights
Los Angeles to Gatwick flights
Los Angeles to Stansted flights
Los Angeles to Madrid flights
Los Angeles to London City flights
Los Angeles to Istanbul flights
San Francisco to Istanbul flights
Los Angeles to Barcelona-El Prat flights
Los Angeles to Frankfurt flights
San Francisco to Gatwick flights
San Francisco to London City flights
Los Angeles to Amsterdam flights
San Francisco to Stansted flights
Los Angeles to Orly flights
Los Angeles to Dublin flights
San Francisco to Frankfurt flights
Los Angeles to Athens flights
San Francisco to Dublin flights
Ontario to Heathrow flights
San Diego to Heathrow flights
Los Angeles to Zurich flights
San Francisco to Zurich flights
San Francisco to Amsterdam flights
Los Angeles to Lisbon flights
San Francisco to Athens flights
Los Angeles to Luton flights
Los Angeles to Frederic Chopin flights
San Francisco to Munich flights
Ontario to Leonardo da Vinci/Fiumicino flights
Los Angeles to Edinburgh flights
San Francisco to Madrid flights
San Francisco to Malpensa flights
San Francisco to Lisbon flights
Los Angeles to Malpensa flights
Las Vegas to Heathrow flights
Los Angeles to Munich flights
Los Angeles to Copenhagen flights
San Francisco to Linate flights
San Francisco to Edinburgh flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights