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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 7/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Aug 5 — Aug 121
Wed 8/5
Wed 8/12
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 6, 2026.

This Delta deal was found by Cheapflights users on 7/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1610:00 pm
ONT
-
ATH
2 stops29h 20m
Delta
Tue 9/11:10 pm
ATH
-
ONT
2 stops33h 06m
Delta
Deal found 7/5$775
This oojo deal was found by Cheapflights users on 7/3. 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 oojo 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
Wed 9/22:00 pm
ATH
-
ONT
1 stop18h 59m
British Airways
Deal found 7/3$777
This Delta deal was found by Cheapflights users on 7/3. 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.
Tue 8/117:05 am
ONT
-
ATH
1 stop17h 55m
Delta
Thu 9/179:45 am
ATH
-
ONT
1 stop18h 24m
Delta
Deal found 7/3$781
This Iberia deal was found by Cheapflights users on 7/3. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:05 am
ONT
-
ATH
1 stop18h 40m
Iberia
Tue 9/12:00 pm
ATH
-
ONT
1 stop18h 59m
Iberia
Deal found 7/3$783
This British Airways deal was found by Cheapflights users on 7/5. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/167:05 am
ONT
-
ATH
1 stop18h 40m
British Airways
Tue 9/12:00 pm
ATH
-
ONT
1 stop18h 59m
British Airways
Deal found 7/5$784
This Delta deal was found by Cheapflights users on 7/4. 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.
Sun 8/237:05 am
ONT
-
ATH
1 stop17h 55m
Delta
Thu 9/246:00 am
ATH
-
ONT
2 stops27h 47m
Delta
Deal found 7/4$785
This United Airlines deal was found by Cheapflights users on 7/2. 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 8/117:00 am
ONT
-
ATH
1 stop17h 35m
United Airlines
Fri 9/256:00 am
ATH
-
ONT
2 stops24h 58m
United Airlines
Deal found 7/2$786
This Delta deal was found by Cheapflights users on 7/2. 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 8/256:20 am
ONT
-
ATH
2 stops21h 20m
Delta
Wed 9/166:00 am
ATH
-
ONT
2 stops21h 20m
Delta
Deal found 7/2$789
This Delta deal was found by Cheapflights users on 7/2. 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 8/246:01 pm
ONT
-
ATH
2 stops33h 39m
Delta
Thu 9/179:45 am
ATH
-
ONT
1 stop18h 24m
Delta
Deal found 7/2$790
This United Airlines deal was found by Cheapflights users on 7/3. 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 8/261:56 pm
ONT
-
ATH
2 stops23h 09m
United Airlines
Fri 9/256:00 am
ATH
-
ONT
2 stops24h 58m
United Airlines
Deal found 7/3$793
This Delta deal was found by Cheapflights users on 7/2. 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 8/251:06 pm
ONT
-
ATH
2 stops17h 44m
Delta
Thu 9/176:00 am
ATH
-
ONT
2 stops20h 35m
Delta
Deal found 7/2$794
This Delta deal was found by Cheapflights users on 7/2. 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 8/246:01 pm
ONT
-
ATH
2 stops33h 39m
Delta
Wed 9/166:00 am
ATH
-
ONT
2 stops21h 20m
Delta
Deal found 7/2$795

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 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$775
(Delta)

One-way from

$319
(Cheapflightsfares)

Popular in

June

Cheapest in

February

Average price

$1,073
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 ($294 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($44 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 6, 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-11:45 am

1 stop18h 40m

Athens Eleftherios V.

Tue 9/1

2:00 pm-10:59 pm

1 stop18h 59m

$825

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Tue 10/6

11:56 am-8:40 pm

2 stops46h 44m

Thessaloniki Makedonia

Tue 10/13

2:15 pm-10:43 pm

2 stops42h 28m

$825

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 11/22

5:00 am-11:00 am

2 stops20h 00m

Athens Eleftherios V.

Fri 11/27

12:50 pm-10:53 pm

2 stops20h 03m

$827

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 8/10

6:10 am-10:35 am

1 stop18h 25m

Athens Eleftherios V.

Wed 8/19

12:35 pm-12:12 pm

2 stops33h 37m

$857

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 8/9

6:10 am-10:35 am

1 stop18h 25m

Athens Eleftherios V.

Wed 8/19

12:35 pm-12:12 pm

2 stops33h 37m

$857

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Tue 10/6

11:56 am-11:05 am

2 stops61h 09m

Thessaloniki Makedonia

Mon 10/12

12:00 pm-5:12 pm

2 stops39h 12m

$890

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 11/22

5:00 am-11:00 am

2 stops20h 00m

Athens Eleftherios V.

Sat 11/28

12:50 pm-10:53 pm

2 stops20h 03m

$1,017

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Fri 9/25

9:10 pm-8:45 am

2 stops25h 35m

Thessaloniki Makedonia

Sun 10/4

9:15 pm-8:13 pm

2 stops56h 58m

$1,118

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Mon 10/5

9:10 pm-8:45 am

2 stops49h 35m

Thessaloniki Makedonia

Sun 10/11

9:35 am-11:45 pm

2 stops24h 10m

$1,148

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Tue 8/18

11:59 pm-8:25 pm

2 stops58h 26m

Thessaloniki Makedonia

Wed 9/30

9:15 pm-8:13 pm

2 stops32h 58m

$1,213

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

Showing 1-10 of 38 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 18h 40m. British Airways provides one of the quickest options available for as low as $825. 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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