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Greece

$369+ 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 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Jul 8 — Jul 151
Wed 7/8
Wed 7/15
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 8, 2026.

This United Airlines deal was found by Cheapflights users on 6/4. 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 10/67:00 am
ONT
-
ATH
1 stop17h 35m
United Airlines
Fri 10/1612:10 pm
ATH
-
ONT
2 stops44h 16m
United Airlines
Deal found 6/4$799
This United Airlines deal was found by Cheapflights users on 6/7. 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 10/101:52 pm
ONT
-
ATH
2 stops34h 18m
United Airlines
Wed 10/1412:10 pm
ATH
-
ONT
2 stops44h 39m
United Airlines
Deal found 6/7$802
This United Airlines deal was found by Cheapflights users on 6/8. 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 10/57:00 am
ONT
-
ATH
1 stop17h 35m
United Airlines
Wed 10/2112:35 pm
ATH
-
ONT
1 stop20h 14m
United Airlines
Deal found 6/8$814
This United Airlines deal was found by Cheapflights users on 6/3. 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 10/77:00 am
ONT
-
ATH
1 stop17h 35m
United Airlines
Fri 10/166:45 am
ATH
-
ONT
2 stops25h 13m
United Airlines
Deal found 6/3$818
This Delta deal was found by Cheapflights users on 6/3. 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 9/277:05 am
ONT
-
ATH
1 stop17h 55m
Delta
Wed 9/306:00 am
ATH
-
ONT
2 stops20h 33m
Delta
Deal found 6/3$819
This Delta deal was found by Cheapflights users on 6/4. 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.
Tue 9/157:05 am
ONT
-
ATH
2 stops29h 55m
Delta
Wed 9/233:30 pm
ATH
-
ONT
2 stops29h 17m
Delta
Deal found 6/4$823
This KLM deal was found by Cheapflights users on 6/7. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:00 pm
ONT
-
ATH
1 stop37h 00m
KLM
Wed 10/141:35 pm
ATH
-
ONT
2 stops20h 13m
KLM
Deal found 6/7$825
This Delta deal was found by Cheapflights users on 6/3. 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 10/77:00 am
ONT
-
ATH
2 stops20h 20m
Delta
Fri 10/166:35 am
ATH
-
ONT
2 stops19h 37m
Delta
Deal found 6/3$830
This United Airlines deal was found by Cheapflights users on 6/4. 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 10/137:00 am
ONT
-
ATH
1 stop17h 35m
United Airlines
Tue 11/36:35 am
ATH
-
ONT
2 stops23h 45m
United Airlines
Deal found 6/4$831
This United Airlines deal was found by Cheapflights users on 6/5. 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 8/26:10 am
ONT
-
ATH
1 stop18h 25m
United Airlines
Tue 9/226:45 am
ATH
-
ONT
2 stops23h 16m
United Airlines
Deal found 6/5$848
This United Airlines deal was found by Cheapflights users on 6/4. 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 12/21:00 pm
ONT
-
ATH
2 stops17h 35m
United Airlines
Tue 12/86:40 am
ATH
-
ONT
2 stops21h 07m
United Airlines
Deal found 6/4$849
This Turkish Airlines deal was found by Cheapflights users on 6/4. 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
Mon 10/129:35 am
SKG
-
ONT
2 stops24h 07m
Multiple Airlines
Deal found 6/4$1,193

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 8, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$799
(United Airlines)

One-way from

$369
(oojo)

Popular in

June

Cheapest in

February

Average price

$1,207
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. 24% potential increase in price ($251 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($40 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 8, 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

Wed 7/29

7:00 am-11:45 am

1 stop18h 45m

Athens Eleftherios V.

Wed 8/12

2:00 pm-10:59 pm

1 stop18h 59m

$915

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 8/4

6:10 am-10:35 am

1 stop18h 25m

Athens Eleftherios V.

Sat 8/15

12:35 pm-10:35 pm

1 stop20h 00m

$1,030

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 7/25

7:05 am-9:20 am

1 stop16h 15m

Athens Eleftherios V.

Mon 8/3

1:10 pm-8:52 am

2 stops29h 42m

$1,049

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 7/13

7:00 am-11:45 am

1 stop18h 45m

Athens Eleftherios V.

Wed 7/22

2:00 pm-11:59 pm

1 stop19h 59m

$1,112

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 7/7

7:00 am-11:45 am

1 stop18h 45m

Athens Eleftherios V.

Tue 7/21

2:00 pm-10:32 pm

1 stop18h 32m

$1,174

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 7/25

12:00 pm-10:00 am

1 stop36h 00m

Athens Eleftherios V.

Mon 8/3

9:45 am-9:52 pm

1 stop22h 07m

$1,188

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Tue 9/22

9:10 pm-8:45 am

2 stops25h 35m

Thessaloniki Makedonia

Mon 10/12

9:35 am-11:42 pm

2 stops24h 07m

$1,193

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 7/24

10:00 pm-11:00 am

1 stop27h 00m

Athens Eleftherios V.

Mon 8/3

9:45 am-9:52 pm

1 stop22h 07m

$1,242

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 7/24

1:50 pm-10:10 am

3 stops58h 20m

Athens Eleftherios V.

Mon 8/3

10:25 am-12:47 pm

2 stops36h 22m

$1,263

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Sat 7/4

5:34 am-2:20 pm

2 stops22h 46m

Thessaloniki Makedonia

Wed 8/12

7:00 pm-6:15 pm

2 stops57h 15m

$1,287

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/3

Showing 1-10 of 46 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 16h 15m. British Airways provides one of the quickest options available for as low as $1,049. 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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