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Greece

$365+ 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 7/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
May 13 — May 201
Wed 5/13
Wed 5/20
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 13, 2026.

This United Airlines deal was found by Cheapflights users on 4/12. 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 10/147:00 am
ONT
-
ATH
1 stop17h 35m
United Airlines
Thu 10/1512:35 pm
ATH
-
ONT
1 stop19h 51m
United Airlines
Deal found 4/12$812
This United Airlines deal was found by Cheapflights users on 4/12. 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 10/117:00 am
ONT
-
ATH
1 stop17h 35m
United Airlines
Tue 10/2012:35 pm
ATH
-
ONT
1 stop19h 51m
United Airlines
Deal found 4/12$814
This United Airlines deal was found by Cheapflights users on 4/12. 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
Thu 10/1512:35 pm
ATH
-
ONT
1 stop19h 51m
United Airlines
Deal found 4/12$820
This United Airlines deal was found by Cheapflights users on 4/11. 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 11/151:00 pm
ONT
-
ATH
2 stops26h 25m
United Airlines
Thu 11/191:00 pm
ATH
-
ONT
2 stops62h 47m
United Airlines
Deal found 4/11$848
This oojo deal was found by Cheapflights users on 4/8. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/94:59 pm
ONT
-
ATH
2 stops23h 26m
British Airways
Wed 9/238:00 pm
ATH
-
ONT
2 stops32h 57m
British Airways
Deal found 4/8$861
This United Airlines deal was found by Cheapflights users on 4/8. 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 10/67:00 am
ONT
-
ATH
1 stop17h 35m
United Airlines
Tue 10/2012:35 pm
ATH
-
ONT
1 stop19h 51m
United Airlines
Deal found 4/8$864
This oojo deal was found by Cheapflights users on 4/12. 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 9/66:00 am
ONT
-
ATH
1 stop19h 45m
British Airways
Wed 9/167:00 pm
ATH
-
ONT
2 stops32h 48m
British Airways
Deal found 4/12$872
This Booking.com deal was found by Cheapflights users on 4/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/74:54 pm
ONT
-
ATH
2 stops34h 16m
British Airways
Mon 10/268:10 pm
ATH
-
ONT
2 stops35h 56m
British Airways
Deal found 4/9$873
This United Airlines deal was found by Cheapflights users on 4/12. 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 10/107:00 am
ONT
-
ATH
1 stop17h 35m
United Airlines
Thu 10/1512:35 pm
ATH
-
ONT
1 stop19h 51m
United Airlines
Deal found 4/12$874
This oojo deal was found by Cheapflights users on 4/11. 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 9/74:54 pm
ONT
-
SKG
2 stops34h 06m
British Airways
Thu 9/242:30 pm
SKG
-
ONT
2 stops37h 18m
British Airways
Deal found 4/11$991
This Turkish Airlines deal was found by Cheapflights users on 4/13. 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.
Sat 5/96:00 am
ONT
-
SKG
2 stops28h 25m
Multiple Airlines
Thu 5/149:15 pm
SKG
-
ONT
2 stops36h 43m
Multiple Airlines
Deal found 4/13$1,168
This Turkish Airlines deal was found by Cheapflights users on 4/12. 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.
Sun 8/92:05 pm
ONT
-
SKG
2 stops20h 20m
Multiple Airlines
Wed 8/199:35 am
SKG
-
ONT
2 stops23h 49m
Multiple Airlines
Deal found 4/12$1,334

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 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$809
(oojo)

One-way from

$365
(Cheapflightsfares)

Popular in

June

Cheapest in

February

Average price

$738
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. 22% potential increase in price ($219 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($38 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 13, 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 10/4

7:00 am-10:35 am

1 stop17h 35m

Athens Eleftherios V.

Fri 10/16

12:35 pm-10:26 pm

1 stop19h 51m

$894

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Mon 9/7

4:54 pm-1:00 pm

2 stops34h 06m

Thessaloniki Makedonia

Thu 9/24

2:30 pm-5:48 pm

2 stops37h 18m

$991

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 8/1

2:05 pm-8:30 pm

2 stops20h 25m

Athens Eleftherios V.

Fri 8/7

3:55 am-11:11 pm

2 stops29h 16m

$1,003

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 8/9

7:05 am-10:00 am

1 stop16h 55m

Athens Eleftherios V.

Tue 8/18

12:10 pm-9:56 pm

1 stop19h 46m

$1,036

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 9/10

11:55 am-11:00 pm

2 stops25h 05m

Athens Eleftherios V.

Sun 9/20

6:00 am-9:56 pm

2 stops25h 56m

$1,064

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Sat 5/9

6:00 am-8:25 pm

2 stops28h 25m

Thessaloniki Makedonia

Thu 5/14

9:15 pm-11:58 pm

2 stops36h 43m

$1,168

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 8/1

1:00 pm-4:50 pm

2 stops17h 50m

Athens Eleftherios V.

Sat 8/8

9:45 am-6:23 pm

1 stop18h 38m

$1,197

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 5/18

1:30 pm-11:05 pm

2 stops23h 35m

Athens Eleftherios V.

Fri 5/29

12:35 pm-10:46 pm

1 stop20h 11m

$1,234
Quickest round-trip

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 7/11

7:05 am-9:20 am

1 stop16h 15m

Athens Eleftherios V.

Fri 8/7

9:45 am-6:23 pm

1 stop18h 38m

$1,246

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 7/11

7:05 am-9:20 am

1 stop16h 15m

Athens Eleftherios V.

Tue 8/4

12:10 pm-9:44 pm

1 stop19h 34m

$1,246

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/12

Showing 1-10 of 38 resultsSorted by cheapest first
1
2
3
4

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

What is the cheapest month to book a flight from Ontario to Greece?

Currently, August is the cheapest month in which you can book a flight from Ontario to Greece (average of $418). Flying from Ontario to Greece in June is currently the most expensive (average of $692). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 13, 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
9,580 reviews

Boarding

7.7

Food

6.6

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

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
9,580 reviews
United Airlines
7.4
Good
9,580 reviews

Boarding

7.7

Food

6.6

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

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 16h 55m. United Airlines provides one of the quickest options available for as low as $1,036. 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.

  • What is the cheapest month to book a flight from Ontario to Greece?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Greece (average of $418). Flying from Ontario to Greece in June is currently the most expensive (average of $692). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$588Average$823FlexibilityNo cancel feeOn-time69%

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