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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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
May 30 — Jun 61
Sat 5/30
Sat 6/6
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 April 30, 2026.

This oojo deal was found by Cheapflights users on 4/28. 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.
Wed 8/1910:29 am
ONT
-
ATH
2 stops22h 31m
British Airways
Wed 9/22:00 pm
ATH
-
ONT
1 stop18h 58m
British Airways
Deal found 4/28$811
This oojo deal was found by Cheapflights users on 4/29. 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 8/257:06 am
ONT
-
ATH
1 stop18h 39m
British Airways
Wed 9/22:00 pm
ATH
-
ONT
1 stop18h 58m
British Airways
Deal found 4/29$815
This oojo deal was found by Cheapflights users on 4/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/167:06 am
ONT
-
ATH
1 stop18h 39m
British Airways
Fri 9/42:00 pm
ATH
-
ONT
1 stop29h 34m
British Airways
Deal found 4/26$821
This Air Canada deal was found by Cheapflights users on 4/28. 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 8/165:00 am
ONT
-
ATH
2 stops22h 25m
Air Canada
Fri 9/43:25 pm
ATH
-
ONT
2 stops31h 13m
Air Canada
Deal found 4/28$841
This United Airlines deal was found by Cheapflights users on 4/28. 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 10/127:00 am
ONT
-
ATH
1 stop17h 35m
United Airlines
Tue 10/2012:35 pm
ATH
-
ONT
1 stop19h 51m
United Airlines
Deal found 4/28$844
This Air Canada deal was found by Cheapflights users on 4/28. 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.
Mon 8/175:00 am
ONT
-
ATH
2 stops20h 10m
Air Canada
Fri 9/43:25 pm
ATH
-
ONT
2 stops31h 13m
Air Canada
Deal found 4/28$846
This United Airlines deal was found by Cheapflights users on 4/27. 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 9/17:00 am
ONT
-
ATH
2 stops17h 10m
United Airlines
Tue 10/2012:35 pm
ATH
-
ONT
1 stop19h 51m
United Airlines
Deal found 4/27$848
This United Airlines deal was found by Cheapflights users on 4/29. 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 10/2012:35 pm
ATH
-
ONT
1 stop19h 51m
United Airlines
Deal found 4/29$857
This Air Canada deal was found by Cheapflights users on 4/29. 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 8/257:00 am
ONT
-
ATH
2 stops17h 10m
Multiple Airlines
Wed 9/212:10 pm
ATH
-
ONT
2 stops19h 49m
Multiple Airlines
Deal found 4/29$864
This oojo deal was found by Cheapflights users on 4/27. 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.
Wed 10/282:22 pm
ONT
-
ATH
2 stops25h 43m
British Airways
Wed 11/118:20 pm
ATH
-
ONT
2 stops35h 39m
British Airways
Deal found 4/27$875
This oojo deal was found by Cheapflights users on 4/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1712:59 pm
ONT
-
SKG
2 stops38h 01m
British Airways
Mon 9/286:45 pm
SKG
-
ONT
2 stops36h 23m
British Airways
Deal found 4/26$926
This oojo deal was found by Cheapflights users on 4/28. 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.
Sun 9/204:59 pm
ONT
-
SKG
2 stops32h 36m
British Airways
Sat 9/261:25 pm
SKG
-
ONT
2 stops39h 32m
British Airways
Deal found 4/28$1,030

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 April 30, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$811
(oojo)

One-way from

$369
(Cheapflightsfares)

Popular in

June

Cheapest in

February

Average price

$747
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. 22% potential increase in price ($226 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 30, 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

Tue 9/8

7:00 am-11:00 am

1 stop18h 00m

Athens Eleftherios V.

Tue 9/22

9:45 am-6:01 pm

1 stop18h 16m

$1,184

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Sun 8/16

11:50 pm-3:25 pm

2 stops29h 35m

Thessaloniki Makedonia

Mon 9/28

4:25 am-8:13 pm

2 stops25h 48m

$1,227

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 7/6

5:44 am-11:45 am

1 stop20h 01m

Athens Eleftherios V.

Fri 7/17

12:00 pm-10:34 pm

1 stop20h 34m

$1,244

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 5/26

10:41 pm-6:15 pm

2 stops33h 34m

Athens Eleftherios V.

Mon 6/8

4:30 pm-8:47 pm

2 stops38h 17m

$1,263

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 9/8

7:00 am-11:00 am

1 stop18h 00m

Athens Eleftherios V.

Wed 9/16

9:45 am-6:01 pm

1 stop18h 16m

$1,273
Quickest round-trip

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 6/28

7:05 am-11:00 am

1 stop17h 55m

Athens Eleftherios V.

Wed 9/16

9:45 am-6:01 pm

1 stop18h 16m

$1,283

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 5/26

10:41 pm-6:15 pm

2 stops33h 34m

Athens Eleftherios V.

Wed 6/10

4:30 am-8:47 pm

2 stops26h 17m

$1,297

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Mon 8/10

11:50 pm-8:45 am

2 stops22h 55m

Thessaloniki Makedonia

Fri 8/21

9:35 am-11:24 pm

2 stops23h 49m

$1,305

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 6/9

7:05 am-11:00 am

1 stop17h 55m

Athens Eleftherios V.

Sun 9/6

9:45 am-6:01 pm

1 stop18h 16m

$1,317

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 7/20

7:05 am-11:00 am

1 stop17h 55m

Athens Eleftherios V.

Sun 7/26

11:30 am-9:50 pm

1 stop20h 20m

$1,356

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/27

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.

Reviews of airlines servicing Greece

Get insights into the airlines that provide service to Greece. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Greece. Reviews last updated April 30, 2026.
Read reviews from past customers who have flown United Airlines from Ontario to Greece. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,677 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
9,677 reviews
United Airlines
7.4
Good
9,677 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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. KLM provides one of the quickest options available for as low as $1,184. 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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Top airline flying from Ontario to Greece

Discover the top airline that operate flights from Ontario to Greece. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$588Average$823FlexibilityNo cancel feeOn-time69%

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