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Greece

$257+ 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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
feb. 28 — mar. 71
sáb. 2/28
sáb. 3/7
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 29, 2026.

This oojo deal was found by Cheapflights users on 1/26. 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.
mié. 2/255:02 pm
ONT
-
ATH
2 stops22h 03m
British Airways
mié. 3/48:20 pm
ATH
-
ONT
2 stops35h 47m
British Airways
Deal found 1/26$491
This United Airlines deal was found by Cheapflights users on 1/28. 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.
lun. 3/26:37 pm
ONT
-
ATH
2 stops21h 03m
United Airlines
vie. 3/136:05 am
ATH
-
ONT
2 stops25h 52m
United Airlines
Deal found 1/28$503
This United Airlines deal was found by Cheapflights users on 1/27. 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.
mar. 3/31:45 pm
ONT
-
ATH
2 stops16h 50m
United Airlines
mié. 3/116:15 am
ATH
-
ONT
2 stops25h 03m
United Airlines
Deal found 1/27$516
This United Airlines deal was found by Cheapflights users on 1/27. 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.
sáb. 2/281:45 pm
ONT
-
ATH
2 stops48h 40m
United Airlines
sáb. 3/1412:15 pm
ATH
-
ONT
2 stops43h 03m
United Airlines
Deal found 1/27$536
This United Airlines deal was found by Cheapflights users on 1/27. 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.
vie. 3/136:15 am
ONT
-
ATH
2 stops34h 25m
United Airlines
vie. 3/2012:50 pm
ATH
-
ONT
2 stops32h 28m
United Airlines
Deal found 1/27$550
This United Airlines deal was found by Cheapflights users on 1/27. 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.
jue. 2/261:45 pm
ONT
-
ATH
2 stops17h 50m
United Airlines
jue. 3/512:50 pm
ATH
-
ONT
2 stops19h 28m
United Airlines
Deal found 1/27$557
This United Airlines deal was found by Cheapflights users on 1/27. 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.
mar. 3/31:45 pm
ONT
-
ATH
2 stops16h 50m
United Airlines
dom. 3/87:05 am
ATH
-
ONT
2 stops24h 52m
United Airlines
Deal found 1/27$558
This KAYAK deal was found by Cheapflights users on 1/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 2/276:37 pm
ONT
-
ATH
2 stops21h 03m
Lufthansa
vie. 3/66:35 am
ATH
-
ONT
2 stops25h 43m
Lufthansa
Deal found 1/28$564
This oojo deal was found by Cheapflights users on 1/26. 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.
mié. 3/42:39 pm
ONT
-
ATH
2 stops24h 26m
British Airways
mié. 3/117:50 am
ATH
-
ONT
2 stops25h 09m
British Airways
Deal found 1/26$568
This oojo deal was found by Cheapflights users on 1/28. 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.
jue. 2/265:02 pm
ONT
-
ATH
2 stops34h 18m
British Airways
lun. 3/28:10 pm
ATH
-
ONT
2 stops30h 12m
British Airways
Deal found 1/28$569
This Tripair deal was found by Cheapflights users on 1/27. 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 Tripair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/26:00 am
ONT
-
ATH
2 stops21h 35m
Multiple Airlines
mié. 3/181:45 pm
ATH
-
ONT
2 stops36h 28m
Multiple Airlines
Deal found 1/27$586
This Turkish Airlines deal was found by Cheapflights users on 1/26. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/181:47 pm
ONT
-
SKG
2 stops20h 38m
Multiple Airlines
mié. 8/269:15 pm
SKG
-
ONT
2 stops58h 54m
Multiple Airlines
Deal found 1/26$1,253

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 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$491
(oojo)

One-way from

$257
(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 29, 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

lun. 3/2

6:37 pm-1:40 am

2 stops21h 03m

Athens Eleftherios V.

mié. 3/11

6:15 am-10:36 pm

2 stops25h 21m

$503

OntarioAthens

ONT - ATH

ONTATH

Ontario

lun. 3/2

6:37 pm-1:40 am

2 stops21h 03m

Athens Eleftherios V.

jue. 3/12

6:25 am-8:50 pm

2 stops23h 25m

$503

OntarioAthens

ONT - ATH

ONTATH

Ontario

mar. 3/3

1:45 pm-4:35 pm

2 stops16h 50m

Athens Eleftherios V.

mié. 3/11

6:15 am-10:18 pm

2 stops25h 03m

$516

OntarioAthens

ONT - ATH

ONTATH

Ontario

lun. 3/2

1:45 pm-4:35 pm

2 stops16h 50m

Athens Eleftherios V.

mié. 3/18

6:15 am-10:18 pm

2 stops25h 03m

$516

OntarioAthens

ONT - ATH

ONTATH

Ontario

mar. 3/3

1:45 pm-4:35 pm

2 stops16h 50m

Athens Eleftherios V.

dom. 3/8

7:05 am-9:57 pm

2 stops24h 52m

$558

OntarioAthens

ONT - ATH

ONTATH

Ontario

dom. 3/15

6:15 am-12:25 am

2 stops33h 10m

Athens Eleftherios V.

lun. 3/30

1:35 pm-10:26 pm

2 stops42h 51m

$564

OntarioAthens

ONT - ATH

ONTATH

Ontario

sáb. 2/14

1:45 pm-12:25 am

2 stops48h 40m

Athens Eleftherios V.

vie. 2/27

6:35 am-10:57 pm

2 stops26h 22m

$637

OntarioAthens

ONT - ATH

ONTATH

Ontario

dom. 5/17

6:00 am-9:00 pm

2 stops29h 00m

Athens Eleftherios V.

sáb. 5/23

1:10 pm-8:17 pm

2 stops41h 07m

$660

OntarioAthens

ONT - ATH

ONTATH

Ontario

lun. 4/20

5:10 am-11:05 pm

2 stops31h 55m

Athens Eleftherios V.

dom. 5/3

12:35 pm-10:30 pm

1 stop19h 55m

$693

OntarioAthens

ONT - ATH

ONTATH

Ontario

mié. 5/13

5:00 am-10:10 am

2 stops19h 10m

Athens Eleftherios V.

vie. 5/22

12:35 pm-10:28 pm

1 stop19h 53m

$778

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

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 $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 29, 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
9,215 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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
9,215 reviews
United Airlines
7.4
Good
9,215 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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 21h 03m. United Airlines provides one of the quickest options available for as low as $503. 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 $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 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$660Average$955FlexibilityNo cancel feeOn-time69%

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