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Greece

$319+ 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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Aug 19 — Aug 261
Wed 8/19
Wed 8/26
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 July 20, 2026.

This Delta deal was found by Cheapflights users on 7/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:05 am
ONT
-
ATH
1 stop16h 55m
Delta
Wed 9/29:45 am
ATH
-
ONT
1 stop20h 08m
Delta
Deal found 7/15$774
This Delta deal was found by Cheapflights users on 7/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/167:05 am
ONT
-
ATH
1 stop16h 55m
Delta
Fri 9/412:10 pm
ATH
-
ONT
1 stop19h 42m
Delta
Deal found 7/17$781
This Delta deal was found by Cheapflights users on 7/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:05 am
ONT
-
ATH
1 stop17h 55m
Delta
Thu 9/106:00 am
ATH
-
ONT
2 stops20h 35m
Delta
Deal found 7/17$785
This Air Canada deal was found by Cheapflights users on 7/16. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/225:00 am
ONT
-
ATH
2 stops20h 00m
Air Canada
Tue 11/241:00 pm
ATH
-
ONT
2 stops41h 56m
Air Canada
Deal found 7/16$807
This United Airlines deal was found by Cheapflights users on 7/19. 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 11/106:00 am
ONT
-
ATH
2 stops18h 05m
United Airlines
Wed 11/181:00 pm
ATH
-
ONT
2 stops39h 29m
United Airlines
Deal found 7/19$810
This United Airlines deal was found by Cheapflights users on 7/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/221:52 pm
ONT
-
ATH
2 stops25h 33m
United Airlines
Thu 11/261:00 pm
ATH
-
ONT
2 stops39h 29m
United Airlines
Deal found 7/16$811
This United Airlines deal was found by Cheapflights users on 7/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/231:52 pm
ONT
-
ATH
2 stops25h 33m
United Airlines
Thu 11/261:00 pm
ATH
-
ONT
2 stops39h 29m
United Airlines
Deal found 7/16$817
This Air Canada deal was found by Cheapflights users on 7/16. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/245:00 am
ONT
-
ATH
2 stops20h 00m
Multiple Airlines
Thu 11/261:00 pm
ATH
-
ONT
2 stops33h 01m
Multiple Airlines
Deal found 7/16$818
This Delta deal was found by Cheapflights users on 7/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:05 am
ONT
-
ATH
1 stop17h 55m
Delta
Fri 9/49:45 am
ATH
-
ONT
1 stop22h 07m
Delta
Deal found 7/15$824
This United Airlines deal was found by Cheapflights users on 7/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/185:00 am
ONT
-
ATH
2 stops20h 00m
United Airlines
Wed 12/212:50 pm
ATH
-
ONT
2 stops20h 16m
United Airlines
Deal found 7/17$827
This Delta deal was found by Cheapflights users on 7/16. 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.
Sat 11/215:50 pm
ONT
-
ATH
2 stops29h 45m
Delta
Fri 11/276:10 am
ATH
-
ONT
2 stops27h 38m
Delta
Deal found 7/16$828
This Ovago deal was found by Cheapflights users on 7/16. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/231:52 pm
ONT
-
SKG
2 stops20h 28m
SWISS
Sun 10/2510:50 am
SKG
-
ONT
2 stops21h 03m
SWISS
Deal found 7/16$1,048

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 July 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$774
(Delta)

One-way from

$319
(Cheapflightsfares)

Popular in

June

Cheapest in

February

Average price

$1,100
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 ($297 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 July 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 July 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

Sun 8/23

5:00 am-10:10 am

2 stops19h 10m

Athens Eleftherios V.

Sun 9/6

6:45 am-6:11 pm

2 stops21h 26m

$891

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 8/17

7:05 am-11:00 am

1 stop17h 55m

Athens Eleftherios V.

Mon 8/31

9:45 am-7:53 pm

1 stop20h 08m

$915

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 8/17

5:00 am-10:10 am

2 stops19h 10m

Athens Eleftherios V.

Mon 8/24

12:35 pm-10:35 pm

1 stop20h 00m

$926
Quickest round-trip

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 8/14

7:05 am-9:15 am

1 stop16h 10m

Athens Eleftherios V.

Mon 8/24

9:45 am-6:30 pm

1 stop18h 45m

$972

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 9/27

1:04 pm-7:55 pm

2 stops20h 51m

Athens Eleftherios V.

Sat 10/3

8:35 pm-6:53 pm

2 stops32h 18m

$1,060

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 8/31

11:59 pm-8:30 pm

2 stops34h 31m

Athens Eleftherios V.

Tue 9/29

3:55 am-8:13 pm

2 stops26h 18m

$1,065

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Sat 9/12

9:10 pm-8:25 pm

2 stops37h 15m

Thessaloniki Makedonia

Sun 9/27

9:15 pm-8:13 pm

2 stops56h 58m

$1,081

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 9/5

11:13 pm-8:30 pm

2 stops35h 17m

Athens Eleftherios V.

Thu 9/24

10:00 pm-8:13 pm

2 stops32h 13m

$1,085

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 9/11

9:10 pm-2:35 pm

2 stops31h 25m

Athens Eleftherios V.

Sun 9/20

10:00 pm-8:13 pm

2 stops32h 13m

$1,165

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 8/1

7:00 am-11:45 am

1 stop18h 45m

Athens Eleftherios V.

Thu 8/20

2:05 pm-10:59 pm

1 stop18h 54m

$1,175

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/19

Showing 1-10 of 43 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 17h 55m. United Airlines provides one of the quickest options available for as low as $915. 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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