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Greece

$242+ 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 3/29. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
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Cheap flight deals from Ontario to Greece

Keep the following information in mind while searching for Ontario to Greece flight deals. Data was last updated January 8, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$441
(oojo)

One-way from

$242
(oojo)

Popular in

June

Cheapest in

February

Average price

$619
Provider with most accurate pricing for Los Angeles-Athens Eleftherios V. flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Athens Eleftherios V. flights.
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From Ontario to Greece
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One-way flight from Ontario to Greece
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Highest demand for flights based on searches. 19% potential increase in price ($182 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find 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 January 8, 2026.

This oojo deal was found by Cheapflights users on 1/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/33:09 pmONT - ATH
2 stops18h 21mBritish Airways
Tue 2/107:35 amATH - ONT
2 stops25h 13mBritish Airways
Deal found 1/7$441
This oojo deal was found by Cheapflights users on 1/8. 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 3/182:39 pmONT - ATH
2 stops25h 26mBritish Airways
Mon 3/308:50 pmATH - ONT
2 stops35h 17mBritish Airways
Deal found 1/8$446
This oojo deal was found by Cheapflights users on 1/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/64:45 pmONT - ATH
2 stops34h 50mBritish Airways
Fri 2/137:45 amATH - ONT
2 stops24h 22mBritish Airways
Deal found 1/7$466
This oojo deal was found by Cheapflights users on 1/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/254:45 pmONT - ATH
2 stops34h 35mBritish Airways
Sat 1/318:05 pmATH - ONT
2 stops36h 08mBritish Airways
Deal found 1/7$491
This oojo deal was found by Cheapflights users on 1/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/52:39 pmONT - ATH
2 stops24h 46mBritish Airways
Tue 3/107:55 pmATH - ONT
2 stops35h 24mBritish Airways
Deal found 1/7$496
This United Airlines deal was found by Cheapflights users on 1/8. 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.
Fri 2/66:39 pmONT - ATH
2 stops21h 01mUnited Airlines
Thu 2/196:25 amATH - ONT
2 stops25h 34mUnited Airlines
Deal found 1/8$502
This oojo deal was found by Cheapflights users on 1/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/22:39 pmONT - ATH
2 stops22h 31mBritish Airways
Mon 3/168:10 pmATH - ONT
2 stops34h 57mBritish Airways
Deal found 1/7$504
This oojo deal was found by Cheapflights users on 1/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/162:39 pmONT - ATH
2 stops23h 31mBritish Airways
Tue 3/317:55 amATH - ONT
2 stops24h 54mBritish Airways
Deal found 1/7$509
This United Airlines deal was found by Cheapflights users on 1/7. 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.
Sun 3/16:09 amONT - ATH
2 stops32h 16mUnited Airlines
Sun 3/1510:55 amATH - ONT
2 stops39h 46mUnited Airlines
Deal found 1/7$513
This oojo deal was found by Cheapflights users on 1/8. 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.
Thu 1/156:00 amONT - ATH
2 stops24h 15mBritish Airways
Thu 2/127:30 amATH - ONT
2 stops26h 29mBritish Airways
Deal found 1/8$554
This oojo deal was found by Cheapflights users on 1/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/215:02 pmONT - ATH
2 stops35h 23mBritish Airways
Fri 4/37:30 amATH - ONT
2 stops24h 37mBritish Airways
Deal found 1/7$555
This oojo deal was found by Cheapflights users on 1/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1712:48 pmONT - ATH
2 stops27h 22mBritish Airways
Tue 10/277:55 pmATH - ONT
2 stops30h 42mBritish Airways
Deal found 1/7$557

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 January 8, 2026.
Use the filters below to find and compare flights from Ontario to Greece that are best for you.

Fly from

Ontario

Fly to

Greece

Route

Depart

Return

Price

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 2/21

1:53 pm-1:40 am

2 stops25h 47m

Athens Eleftherios V.

Sat 2/28

6:30 am-9:59 pm

2 stops25h 29m

$502

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 3/1

6:09 am-12:25 am

2 stops32h 16m

Athens Eleftherios V.

Sun 3/15

10:55 am-5:41 pm

2 stops39h 46m

$513

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 4/21

4:52 pm-1:10 pm

2 stops34h 18m

Athens Eleftherios V.

Thu 4/30

6:00 pm-6:37 pm

2 stops34h 37m

$613

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 3/29

10:25 pm-11:00 am

1 stop26h 35m

Athens Eleftherios V.

Sun 4/5

9:10 am-9:04 pm

1 stop21h 54m

$685

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 3/27

6:00 am-4:35 pm

2 stops25h 35m

Athens Eleftherios V.

Fri 4/3

6:45 am-8:36 pm

2 stops23h 51m

$702

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Thu 4/9

10:59 am-2:45 pm

2 stops41h 46m

Thessaloniki Makedonia

Wed 4/29

6:50 pm-6:37 pm

2 stops33h 47m

$730

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 4/20

11:53 am-1:10 am

2 stops27h 17m

Athens Eleftherios V.

Sun 5/3

9:10 am-6:28 pm

1 stop19h 18m

$744

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Sun 3/15

6:00 am-12:50 pm

2 stops45h 50m

Thessaloniki Makedonia

Sun 3/22

12:25 pm-5:13 pm

2 stops37h 48m

$856

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 4/16

1:27 pm-9:00 pm

2 stops21h 33m

Athens Eleftherios V.

Wed 4/29

12:35 pm-10:26 pm

1 stop19h 51m

$862

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 6/7

7:00 am-10:35 am

1 stop17h 35m

Athens Eleftherios V.

Wed 9/2

12:35 pm-10:26 pm

1 stop19h 51m

$867

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 35 results
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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

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 $421). Flying from Ontario to Greece in July is currently the most expensive (average of $601). 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 January 8, 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
9,139 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

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
9,139 reviews
United Airlines
7.4
Good
9,139 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

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 25h 47m. United Airlines provides one of the quickest options available for as low as $502. 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 $421). Flying from Ontario to Greece in July is currently the most expensive (average of $601). 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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$660Average$1,101FlexibilityNo cancel feeOn-time69%

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