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$346+ 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 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
abr. 22 — abr. 291
mar. 4/22
mar. 4/29
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 abril 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$689
(Air Canada)

One-way from

$346
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$731
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. 23% potential increase in price ($257 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 abril 17, 2025.

This Air Canada deal was found by Cheapflights users on 4/17. 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.
dom. 8/175:05 amONT - ATH
2 stops19h 00mAir Canada
vie. 9/263:30 pmATH - ONT
2 stops31h 02mAir Canada
Deal found 4/17$689
This Delta deal was found by Cheapflights users on 4/17. 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. 8/177:00 amONT - ATH
1 stop17h 55mDelta
mar. 9/2312:10 pmATH - ONT
1 stop20h 31mDelta
Deal found 4/17$706
This Iberia deal was found by Cheapflights users on 4/17. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/243:00 pmONT - ATH
2 stops23h 50mMultiple Airlines
lun. 10/208:45 pmATH - ONT
2 stops37h 17mMultiple Airlines
Deal found 4/17$737
This United Airlines deal was found by Cheapflights users on 4/17. 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. 8/157:00 amONT - ATH
1 stop17h 30mUnited Airlines
vie. 8/2912:35 pmATH - ONT
1 stop19h 51mUnited Airlines
Deal found 4/17$766
This KLM deal was found by Cheapflights users on 4/17. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/110:15 pmONT - ATH
1 stop26h 40mKLM
jue. 5/810:30 amATH - ONT
1 stop19h 03mKLM
Deal found 4/17$836
This Air France deal was found by Cheapflights users on 4/17. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/112:07 pmONT - ATH
2 stops18h 58mAir France
mié. 5/73:25 amATH - ONT
2 stops22h 52mAir France
Deal found 4/17$980
This American Airlines deal was found by Cheapflights users on 4/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/214:35 pmONT - ATH
2 stops23h 35mAmerican Airlines
mié. 4/231:00 pmATH - ONT
2 stops20h 50mAmerican Airlines
Deal found 4/17$1,069
This Justfly.com deal was found by Cheapflights users on 4/16. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/1611:59 pmONT - ATH
2 stops40h 16mBritish Airways
jue. 4/245:45 pmATH - ONT
2 stops38h 13mBritish Airways
Deal found 4/16$1,126
This Air Serbia deal was found by Cheapflights users on 4/17. 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 Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/211:45 pmONT - ATH
2 stops41h 40mAir Serbia
mar. 9/164:25 pmATH - ONT
2 stops39h 16mAir Serbia
Deal found 4/17$1,143
This oojo deal was found by Cheapflights users on 4/17. 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. 9/1410:54 amONT - ATH
2 stops42h 16mIberia
dom. 9/2810:45 pmATH - ONT
2 stops34h 51mIberia
Deal found 4/17$1,491
This Air Serbia deal was found by Cheapflights users on 4/16. 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 Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 6/1611:45 pmONT - SKG
2 stops41h 25mAir Serbia
lun. 7/74:10 pmSKG - ONT
2 stops40h 20mAir Serbia
Deal found 4/16$1,773
This KLM deal was found by Cheapflights users on 4/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 6/185:08 pmONT - SKG
2 stops17h 32mKLM
dom. 7/69:45 amSKG - ONT
2 stops20h 09mKLM
Deal found 4/16$3,931

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 abril 17, 2025.
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. 8/17

5:05 am-10:05 am

2 stops19h 00m

Athens Eleftherios V.

vie. 9/26

3:30 pm-12:32 pm

2 stops31h 02m

$689

OntarioAthens

ONT - ATH

ONTATH

Ontario

dom. 8/17

7:00 am-10:55 am

1 stop17h 55m

Athens Eleftherios V.

mar. 9/23

12:10 pm-10:41 pm

1 stop20h 31m

$706

OntarioAthens

ONT - ATH

ONTATH

Ontario

mié. 9/24

3:00 pm-12:50 am

2 stops23h 50m

Athens Eleftherios V.

lun. 10/20

8:45 pm-12:02 am

2 stops37h 17m

$737

OntarioAthens

ONT - ATH

ONTATH

Ontario

vie. 8/15

7:00 am-10:30 am

1 stop17h 30m

Athens Eleftherios V.

vie. 8/29

12:35 pm-10:26 pm

1 stop19h 51m

$766

OntarioAthens

ONT - ATH

ONTATH

Ontario

jue. 5/1

10:15 pm-10:55 am

1 stop26h 40m

Athens Eleftherios V.

jue. 5/8

10:30 am-7:33 pm

1 stop19h 03m

$836

OntarioAthens

ONT - ATH

ONTATH

Ontario

jue. 5/1

12:07 pm-5:05 pm

2 stops18h 58m

Athens Eleftherios V.

mié. 5/7

3:25 am-4:17 pm

2 stops22h 52m

$980

OntarioAthens

ONT - ATH

ONTATH

Ontario

mar. 9/2

11:45 pm-3:25 am

2 stops41h 40m

Athens Eleftherios V.

mar. 9/16

4:25 pm-9:41 pm

2 stops39h 16m

$1,143

OntarioAthens

ONT - ATH

ONTATH

Ontario

dom. 9/14

10:54 am-3:10 pm

2 stops42h 16m

Athens Eleftherios V.

dom. 9/28

10:45 pm-11:36 pm

2 stops34h 51m

$1,491

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

lun. 6/16

11:45 pm-3:10 am

2 stops41h 25m

Thessaloniki Makedonia

lun. 7/7

4:10 pm-10:30 pm

2 stops40h 20m

$1,773

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

mié. 6/18

5:08 pm-8:40 pm

2 stops17h 32m

Thessaloniki Makedonia

dom. 7/6

9:45 am-7:54 pm

2 stops20h 09m

$3,931

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 21 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, November is the cheapest month in which you can book a flight from Ontario to Greece (average of $679). Flying from Ontario to Greece in June is currently the most expensive (average of $1,340). 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.

What is the cheapest time of day to fly from ONT to GR?

Find hourly flight availability from Ontario to Greece. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated abril 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Greece as you normally would.

Rainfall in Greece by month

Plan your trip to Greece by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Greece ranges from 0.2 - 2.5 inches per month. December is typically the wettest month, when rainfall can reach 2.5 in. June is typically the driest time to visit Greece when rainfall is around 0.2 in.

Temperature in Greece by month

Plan your trip to Greece by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Greece, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 50.0 F).

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 abril 17, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Air France from Ontario to Greece to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,917 reviews
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,329 reviews
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.5
Good
1,435 reviews
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,667 reviews
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines to fly from Ontario to Greece one-way?

    $444 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Air Canada and KLM, with prices starting from $451 and $492, respectively.

  • 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, November is the cheapest month in which you can book a flight from Ontario to Greece (average of $679). Flying from Ontario to Greece in June is currently the most expensive (average of $1,340). 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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Alternative routes for Ontario to Greece

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Ontario to Greece

Discover the top 5 airlines 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 abril 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$537Average$801FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$550Average$1,098FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$552Average$902FlexibilityNo cancel feeOn-time71%
DeltaCheapest$571Average$860FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$602Average$1,371FlexibilityNo cancel feeOn-time75%

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