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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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Sep 9 — Sep 161
Wed 9/9
Wed 9/16
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 August 10, 2026.

This United Airlines deal was found by Cheapflights users on 8/9. 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 11/116:00 am -
2 stops18h 05m
Wed 11/251:00 pm -
2 stops36h 59m
Deal found 8/9$810
This United Airlines deal was found by Cheapflights users on 8/6. 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 12/61:00 pm -
2 stops26h 30m
Thu 12/101:00 pm -
2 stops39h 44m
Deal found 8/6$813
This United Airlines deal was found by Cheapflights users on 8/9. 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 11/116:00 am -
2 stops18h 05m
Fri 11/276:45 am -
2 stops23h 30m
Deal found 8/9$833
This United Airlines deal was found by Cheapflights users on 8/8. 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.
Tue 11/106:00 am -
2 stops18h 05m
Tue 11/246:40 am -
2 stops22h 07m
Deal found 8/8$835
This American Airlines deal was found by Cheapflights users on 8/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1612:59 pm -
2 stops19h 31m
Tue 9/12:00 pm -
1 stop18h 59m
Deal found 8/6$837
This Flysmarter deal was found by Cheapflights users on 8/6. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/167:05 am -
1 stop18h 40m
Tue 9/12:00 pm -
1 stop18h 59m
Deal found 8/6$838
This United Airlines deal was found by Cheapflights users on 8/6. 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 8/187:00 am -
1 stop17h 35m
Tue 9/112:35 pm -
1 stop20h 00m
Deal found 8/6$847
This United Airlines deal was found by Cheapflights users on 8/6. 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 8/257:00 am -
1 stop17h 35m
Thu 9/106:35 am -
2 stops21h 36m
Deal found 8/6$850
This Delta deal was found by Cheapflights users on 8/6. 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 8/307:05 am -
1 stop16h 55m
Tue 9/1510:05 am -
2 stops35h 00m
Deal found 8/6$851
This Delta deal was found by Cheapflights users on 8/6. 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 9/76:00 am -
2 stops31h 00m
Wed 9/166:00 am -
2 stops26h 40m
Deal found 8/6$852
This United Airlines deal was found by Cheapflights users on 8/6. 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 8/269:01 am -
2 stops23h 39m
Wed 9/912:35 pm -
1 stop20h 24m
Deal found 8/6$854
This lastminute.com deal was found by Cheapflights users on 8/8. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1310:39 pm -
2 stops35h 46m
Mon 9/289:15 pm -
2 stops33h 42m
Deal found 8/8$1,121

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 August 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$810
(United Airlines)

One-way from

$319
(Kissandfly.com)

Popular in

June

Cheapest in

February

Average price

$843
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. 25% potential increase in price ($281 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 10, 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 Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 8/31

5:00 am-11:05 pm

2 stops32h 05m

Athens Eleftherios V.

Tue 9/15

6:55 am-8:01 pm

2 stops23h 06m

$859

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Thu 1/7

6:00 am-11:00 am

2 stops19h 00m

Athens Eleftherios V.

Fri 2/5

6:40 am-6:44 pm

2 stops22h 04m

$884

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 8/31

6:00 am-11:45 am

1 stop19h 45m

Athens Eleftherios V.

Tue 9/15

8:00 pm-8:07 pm

2 stops34h 07m

$890

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 10/20

7:00 am-10:35 am

1 stop17h 35m

Athens Eleftherios V.

Sat 10/31

6:40 am-8:51 pm

2 stops23h 11m

$965

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Fri 8/21

7:05 am-11:45 am

1 stop18h 40m

Athens Eleftherios V.

Sat 9/5

2:00 pm-10:59 pm

1 stop18h 59m

$1,064

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 8/30

7:05 am-11:00 am

1 stop17h 55m

Athens Eleftherios V.

Thu 10/15

9:45 am-9:54 pm

1 stop22h 09m

$1,099

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sat 9/26

4:03 pm-11:05 pm

2 stops21h 02m

Athens Eleftherios V.

Sun 10/4

11:45 am-9:59 pm

2 stops44h 14m

$1,110

OntarioThessaloniki

ONT Ontario - SKG Thessaloniki Makedonia

ONTSKG

Ontario

Sun 9/13

10:39 pm-8:25 pm

2 stops35h 46m

Thessaloniki Makedonia

Mon 9/28

9:15 pm-8:57 pm

2 stops33h 42m

$1,121

OntarioThessaloniki

ONT Ontario - SKG Thessaloniki Makedonia

ONTSKG

Ontario

Tue 9/1

11:59 pm-8:25 pm

2 stops58h 26m

Thessaloniki Makedonia

Fri 10/30

9:30 am-10:15 pm

2 stops21h 45m

$1,153

OntarioThessaloniki

ONT Ontario - SKG Thessaloniki Makedonia

ONTSKG

Ontario

Fri 9/25

10:39 pm-8:45 am

2 stops48h 06m

Thessaloniki Makedonia

Thu 10/8

9:35 am-10:15 pm

2 stops22h 40m

$1,300

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/6

Showing 1-10 of 34 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 $997. 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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