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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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
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 27, 2026.

This United Airlines deal was found by Cheapflights users on 7/23. 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 12/65:00 am
ONT
-
ATH
2 stops20h 00m
United Airlines
Thu 12/101:00 pm
ATH
-
ONT
2 stops41h 20m
United Airlines
Deal found 7/23$736
This Delta deal was found by Cheapflights users on 7/23. 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 8/237:05 am
ONT
-
ATH
1 stop17h 55m
Delta
Wed 9/29:45 am
ATH
-
ONT
1 stop20h 08m
Delta
Deal found 7/23$786
This Delta deal was found by Cheapflights users on 7/22. 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 8/237:05 am
ONT
-
ATH
1 stop17h 55m
Delta
Wed 9/166:00 am
ATH
-
ONT
2 stops21h 19m
Delta
Deal found 7/22$790
This Delta deal was found by Cheapflights users on 7/24. 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 8/2912:00 pm
ONT
-
ATH
1 stop36h 00m
Delta
Wed 10/141:35 pm
ATH
-
ONT
2 stops43h 08m
Delta
Deal found 7/24$796
This United Airlines deal was found by Cheapflights users on 7/24. 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 8/315:00 am
ONT
-
ATH
2 stops27h 40m
United Airlines
Wed 10/146:55 am
ATH
-
ONT
2 stops25h 56m
United Airlines
Deal found 7/24$798
This United Airlines deal was found by Cheapflights users on 7/25. 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 8/315:00 am
ONT
-
ATH
2 stops32h 05m
United Airlines
Mon 9/142:15 pm
ATH
-
ONT
3 stops39h 46m
United Airlines
Deal found 7/25$817
This British Airways deal was found by Cheapflights users on 7/26. 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 8/257:05 am
ONT
-
ATH
1 stop18h 40m
British Airways
Tue 9/12:00 pm
ATH
-
ONT
1 stop18h 59m
British Airways
Deal found 7/26$829
This BusinessClass deal was found by Cheapflights users on 7/24. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2412:59 pm
ONT
-
ATH
2 stops27h 11m
British Airways
Fri 9/42:00 pm
ATH
-
ONT
1 stop18h 59m
British Airways
Deal found 7/24$831
This BusinessClass deal was found by Cheapflights users on 7/24. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:00 am
ONT
-
ATH
1 stop19h 45m
British Airways
Fri 9/42:00 pm
ATH
-
ONT
1 stop18h 59m
British Airways
Deal found 7/24$834
This United Airlines deal was found by Cheapflights users on 7/26. 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 12/296:45 am
ONT
-
ATH
2 stops25h 15m
United Airlines
Thu 1/76:40 am
ATH
-
ONT
2 stops21h 07m
United Airlines
Deal found 7/26$836
This United Airlines deal was found by Cheapflights users on 7/22. 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 8/197:00 am
ONT
-
ATH
1 stop17h 35m
United Airlines
Fri 8/2812:10 pm
ATH
-
ONT
2 stops41h 51m
United Airlines
Deal found 7/22$837
This Turkish Airlines deal was found by Cheapflights users on 7/26. 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.
Tue 9/229:10 pm
ONT
-
SKG
2 stops25h 35m
Multiple Airlines
Fri 10/169:35 am
SKG
-
ONT
2 stops24h 07m
Multiple Airlines
Deal found 7/26$1,094

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 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$736
(United Airlines)

One-way from

$319
(Cheapflightsfares)

Popular in

June

Cheapest in

February

Average price

$1,111
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 ($292 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 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 27, 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 12/6

6:00 am-11:00 am

2 stops19h 00m

Athens Eleftherios V.

Thu 12/10

1:00 pm-6:44 pm

2 stops39h 44m

$813

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 10/6

7:00 am-10:35 am

1 stop17h 35m

Athens Eleftherios V.

Sun 10/18

12:35 pm-10:49 pm

1 stop20h 14m

$908

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 10/18

7:00 am-10:35 am

1 stop17h 35m

Athens Eleftherios V.

Thu 10/29

6:40 am-8:51 pm

2 stops23h 11m

$930

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 10/12

7:00 am-10:35 am

1 stop17h 35m

Athens Eleftherios V.

Wed 10/28

6:35 am-8:51 pm

2 stops23h 16m

$1,031

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Tue 9/22

9:10 pm-8:45 am

2 stops25h 35m

Thessaloniki Makedonia

Fri 10/16

9:35 am-11:42 pm

2 stops24h 07m

$1,094

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Sat 9/5

11:13 pm-8:25 pm

2 stops35h 12m

Thessaloniki Makedonia

Sun 9/27

9:15 pm-8:13 pm

2 stops56h 58m

$1,118

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Thu 9/17

9:10 pm-8:45 am

2 stops25h 35m

Thessaloniki Makedonia

Thu 10/1

9:35 am-8:13 pm

2 stops44h 38m

$1,127

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 8/13

7:05 am-11:45 am

1 stop18h 40m

Athens Eleftherios V.

Thu 8/27

2:05 pm-10:59 pm

1 stop18h 54m

$1,180

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 9/2

11:59 pm-8:55 am

2 stops46h 56m

Athens Eleftherios V.

Sat 9/12

4:00 am-7:03 pm

2 stops25h 03m

$1,336

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 9/8

11:50 pm-8:55 am

2 stops23h 05m

Athens Eleftherios V.

Wed 9/23

4:00 am-8:13 pm

2 stops26h 13m

$1,376

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

Showing 1-10 of 39 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 19h. United Airlines provides one of the quickest options available for as low as $813. 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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