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Greece

$266+ 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 7/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
feb. 25 — mar. 41
mié. 2/25
mié. 3/4
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 enero 26, 2026.

This oojo deal was found by Cheapflights users on 1/25. 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.
dom. 2/225:02 pm
ONT
-
ATH
2 stops34h 18m
British Airways
sáb. 2/288:05 pm
ATH
-
ONT
2 stops36h 02m
British Airways
Deal found 1/25$491
This United Airlines deal was found by Cheapflights users on 1/24. 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.
lun. 3/911:59 pm
ONT
-
ATH
2 stops24h 06m
United Airlines
jue. 3/196:25 am
ATH
-
ONT
2 stops25h 32m
United Airlines
Deal found 1/24$499
This United Airlines deal was found by Cheapflights users on 1/24. 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.
lun. 3/911:59 pm
ONT
-
ATH
2 stops24h 06m
United Airlines
dom. 3/156:35 am
ATH
-
ONT
2 stops25h 22m
United Airlines
Deal found 1/24$501
This United Airlines deal was found by Cheapflights users on 1/24. 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.
jue. 3/56:37 pm
ONT
-
ATH
2 stops21h 03m
United Airlines
jue. 3/196:25 am
ATH
-
ONT
2 stops25h 32m
United Airlines
Deal found 1/24$502
This United Airlines deal was found by Cheapflights users on 1/24. 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.
jue. 3/51:40 pm
ONT
-
ATH
2 stops26h 00m
United Airlines
sáb. 3/146:35 am
ATH
-
ONT
2 stops24h 43m
United Airlines
Deal found 1/24$504
This United Airlines deal was found by Cheapflights users on 1/24. 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.
mar. 3/106:15 am
ONT
-
ATH
2 stops41h 50m
United Airlines
mar. 3/176:25 am
ATH
-
ONT
2 stops20h 16m
United Airlines
Deal found 1/24$505
This United Airlines deal was found by Cheapflights users on 1/25. 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.
mar. 2/241:50 pm
ONT
-
ATH
2 stops25h 05m
United Airlines
mar. 3/36:25 am
ATH
-
ONT
2 stops24h 25m
United Airlines
Deal found 1/25$515
This oojo deal was found by Cheapflights users on 1/23. 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.
mar. 3/103:19 pm
ONT
-
ATH
2 stops25h 01m
British Airways
mar. 3/318:00 pm
ATH
-
ONT
2 stops36h 19m
British Airways
Deal found 1/23$531
This Delta deal was found by Cheapflights users on 1/24. 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.
dom. 3/810:25 pm
ONT
-
ATH
1 stop26h 30m
Delta
mar. 3/1711:50 am
ATH
-
ONT
2 stops32h 57m
Delta
Deal found 1/24$552
This oojo deal was found by Cheapflights users on 1/25. 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.
mié. 2/252:39 pm
ONT
-
ATH
2 stops24h 26m
British Airways
vie. 4/37:30 am
ATH
-
ONT
2 stops24h 37m
British Airways
Deal found 1/25$555
This Delta deal was found by Cheapflights users on 1/24. 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.
dom. 3/810:25 pm
ONT
-
ATH
1 stop26h 30m
Delta
dom. 3/1511:50 am
ATH
-
ONT
2 stops56h 57m
Delta
Deal found 1/24$557
This oojo deal was found by Cheapflights users on 1/24. 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.
mar. 8/184:54 pm
ONT
-
SKG
2 stops34h 41m
British Airways
mié. 8/261:55 pm
SKG
-
ONT
2 stops42h 19m
British Airways
Deal found 1/24$889

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 enero 26, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$491
(oojo)

One-way from

$266
(oojo)

Popular in

June

Cheapest in

February

Average price

$615
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. 19% potential increase in price ($189 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 enero 26, 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

dom. 3/8

6:15 am-1:40 am

2 stops34h 25m

Athens Eleftherios V.

jue. 3/19

6:25 am-10:57 pm

2 stops25h 32m

$502

OntarioAthens

ONT - ATH

ONTATH

Ontario

mié. 3/11

6:15 am-1:40 am

2 stops34h 25m

Athens Eleftherios V.

mié. 3/18

2:20 pm-12:18 pm

2 stops30h 58m

$502

OntarioAthens

ONT - ATH

ONTATH

Ontario

jue. 3/5

1:40 pm-1:40 am

2 stops26h 00m

Athens Eleftherios V.

sáb. 3/14

6:35 am-10:18 pm

2 stops24h 43m

$504

OntarioAthens

ONT - ATH

ONTATH

Ontario

sáb. 3/7

6:37 pm-1:40 am

2 stops21h 03m

Athens Eleftherios V.

dom. 3/15

6:35 am-12:18 pm

2 stops38h 43m

$504

OntarioAthens

ONT - ATH

ONTATH

Ontario

mar. 3/3

1:45 pm-4:35 pm

2 stops16h 50m

Athens Eleftherios V.

mar. 3/10

6:25 am-8:50 pm

2 stops23h 25m

$515

OntarioAthens

ONT - ATH

ONTATH

Ontario

dom. 3/8

10:25 pm-9:55 am

1 stop26h 30m

Athens Eleftherios V.

mié. 3/18

11:50 am-11:47 am

2 stops32h 57m

$552

OntarioAthens

ONT - ATH

ONTATH

Ontario

mar. 2/17

8:00 am-4:35 pm

2 stops22h 35m

Athens Eleftherios V.

mar. 3/3

6:25 am-5:41 pm

2 stops21h 16m

$629

OntarioAthens

ONT - ATH

ONTATH

Ontario

lun. 4/20

5:10 am-11:05 pm

2 stops31h 55m

Athens Eleftherios V.

dom. 5/3

12:10 pm-5:52 pm

2 stops39h 42m

$672

OntarioAthens

ONT - ATH

ONTATH

Ontario

jue. 4/16

12:19 pm-12:45 am

2 stops26h 26m

Athens Eleftherios V.

jue. 4/23

7:25 am-10:35 pm

2 stops25h 10m

$678

OntarioAthens

ONT - ATH

ONTATH

Ontario

sáb. 2/14

5:02 pm-1:25 am

2 stops22h 23m

Athens Eleftherios V.

sáb. 2/21

2:20 pm-10:07 pm

2 stops41h 47m

$691

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Showing 1-10 of 26 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 $422). 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 enero 26, 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
9,199 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

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
9,199 reviews
United Airlines
7.4
Good
9,199 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

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 28h 20m. United Airlines provides one of the quickest options available for as low as $1,072. The distance from Ontario to Greece is about 6700 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 $422). 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 enero 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$660Average$955FlexibilityNo cancel feeOn-time69%

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