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Greece

$316+ 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 15 — Jul 221
Wed 7/15
Wed 7/22
1 adult, Economy
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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 15, 2026.

This oojo deal was found by Cheapflights users on 6/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:00 am
ONT
-
ATH
1 stop19h 45m
British Airways
Tue 9/12:00 pm
ATH
-
ONT
1 stop18h 59m
British Airways
Deal found 6/13$774
This British Airways deal was found by Cheapflights users on 6/13. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/47:00 am
ONT
-
ATH
1 stop18h 45m
British Airways
Thu 9/32:05 pm
ATH
-
ONT
1 stop18h 54m
British Airways
Deal found 6/13$795
This Iberia deal was found by Cheapflights users on 6/14. 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.
Wed 8/267:06 am
ONT
-
ATH
1 stop18h 39m
Multiple Airlines
Wed 9/97:30 am
ATH
-
ONT
2 stops22h 39m
Multiple Airlines
Deal found 6/14$802
This Air Canada deal was found by Cheapflights users on 6/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/151:56 pm
ONT
-
ATH
2 stops37h 44m
Air Canada
Wed 9/231:10 pm
ATH
-
ONT
2 stops41h 48m
Air Canada
Deal found 6/11$812
This Delta deal was found by Cheapflights users on 6/14. 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.
Sun 9/1310:59 pm
ONT
-
ATH
1 stop26h 01m
Delta
Fri 10/26:00 am
ATH
-
ONT
2 stops21h 20m
Delta
Deal found 6/14$818
This United Airlines deal was found by Cheapflights users on 6/14. 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.
Mon 9/215:00 am
ONT
-
ATH
2 stops19h 10m
United Airlines
Tue 10/136:45 am
ATH
-
ONT
2 stops23h 46m
United Airlines
Deal found 6/14$821
This Delta deal was found by Cheapflights users on 6/14. 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 9/1411:59 am
ONT
-
ATH
2 stops19h 41m
Delta
Tue 9/296:00 am
ATH
-
ONT
2 stops21h 20m
Delta
Deal found 6/14$822
This Delta deal was found by Cheapflights users on 6/11. 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.
Sun 10/187:00 am
ONT
-
ATH
1 stop18h 00m
Delta
Mon 10/261:35 pm
ATH
-
ONT
2 stops35h 37m
Delta
Deal found 6/11$824
This United Airlines deal was found by Cheapflights users on 6/14. 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 9/131:18 pm
ONT
-
ATH
2 stops23h 47m
United Airlines
Fri 10/26:45 am
ATH
-
ONT
2 stops26h 04m
United Airlines
Deal found 6/14$825
This United Airlines deal was found by Cheapflights users on 6/14. 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.
Sat 9/197:00 am
ONT
-
ATH
2 stops44h 40m
United Airlines
Fri 10/26:45 am
ATH
-
ONT
2 stops26h 04m
United Airlines
Deal found 6/14$826
This Delta deal was found by Cheapflights users on 6/11. 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.
Sun 10/1811:55 am
ONT
-
ATH
2 stops25h 05m
Delta
Wed 10/281:35 pm
ATH
-
ONT
2 stops42h 08m
Delta
Deal found 6/11$828
This United Airlines deal was found by Cheapflights users on 6/11. 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 10/207:00 am
ONT
-
ATH
1 stop17h 35m
United Airlines
Wed 10/282:30 pm
ATH
-
ONT
2 stops40h 56m
United Airlines
Deal found 6/11$829

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 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$774
(oojo)

One-way from

$316
(oojo)

Popular in

June

Cheapest in

February

Average price

$1,256
Provider with most accurate pricing for Los Angeles Los Angeles-Athens Eleftherios V. flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles 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. 25% potential increase in price ($278 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($42 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 15, 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

Mon 8/17

7:05 am-10:00 am

1 stop16h 55m

Athens Eleftherios V.

Mon 8/31

6:35 pm-4:24 pm

2 stops31h 49m

$881

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 8/17

7:13 pm-10:10 am

2 stops28h 57m

Athens Eleftherios V.

Mon 8/31

11:45 am-10:35 pm

2 stops44h 50m

$884

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 10/13

7:00 am-10:35 am

1 stop17h 35m

Athens Eleftherios V.

Sat 10/24

6:00 am-8:58 pm

2 stops24h 58m

$885

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 7/11

12:00 pm-11:00 am

1 stop37h 00m

Athens Eleftherios V.

Fri 8/28

6:00 am-11:34 pm

2 stops27h 34m

$939

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 8/7

7:06 am-11:45 am

1 stop18h 39m

Athens Eleftherios V.

Fri 8/21

2:00 pm-10:59 pm

1 stop18h 59m

$978

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 7/13

7:00 am-11:45 am

1 stop18h 45m

Athens Eleftherios V.

Tue 7/28

2:00 pm-10:32 pm

1 stop18h 32m

$1,127
Quickest round-trip

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 9/24

7:05 am-11:00 am

1 stop17h 55m

Athens Eleftherios V.

Tue 10/6

9:45 am-6:18 pm

1 stop18h 33m

$1,152

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Sun 9/6

11:50 pm-8:25 pm

2 stops34h 35m

Thessaloniki Makedonia

Mon 9/28

9:15 pm-8:13 pm

2 stops56h 58m

$1,163

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 8/5

7:05 am-11:00 am

1 stop17h 55m

Athens Eleftherios V.

Wed 8/19

9:45 am-7:53 pm

1 stop20h 08m

$1,201

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 9/14

9:10 pm-2:50 pm

2 stops31h 40m

Athens Eleftherios V.

Tue 9/29

3:55 am-8:13 pm

2 stops26h 18m

$1,403

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/14

Showing 1-10 of 40 resultsSorted by cheapest first
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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 28h 57m. United Airlines provides one of the quickest options available for as low as $884. 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

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