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$444+ 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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$537
(Delta)

One-way from

$444
(United Airlines)

Popular in

June

Cheapest in

November

Average price

$630
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. 28% potential increase in price ($341 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($50 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This Delta deal was found by Cheapflights users on 2/19. 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.
Tue 3/185:30 pmONT - ATH
2 stops31h 05mDelta
Tue 4/110:30 amATH - ONT
2 stops23h 26mDelta
Deal found 2/19$537
This United Airlines deal was found by Cheapflights users on 2/19. 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 3/196:00 amONT - ATH
2 stops18h 10mUnited Airlines
Wed 3/2612:55 pmATH - ONT
2 stops32h 49mUnited Airlines
Deal found 2/19$608
This KLM deal was found by Cheapflights users on 2/20. 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.
Thu 2/206:00 amONT - ATH
2 stops24h 35mKLM
Thu 2/276:00 amATH - ONT
2 stops26h 52mKLM
Deal found 2/20$673
This American Airlines deal was found by Cheapflights users on 2/18. 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.
Wed 12/38:48 amONT - ATH
2 stops20h 17mAmerican Airlines
Tue 12/97:45 amATH - ONT
3 stops23h 52mAmerican Airlines
Deal found 2/18$677
This KLM deal was found by Cheapflights users on 2/20. 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.
Thu 2/206:00 amONT - ATH
2 stops24h 35mMultiple Airlines
Wed 2/263:25 amATH - ONT
2 stops23h 03mMultiple Airlines
Deal found 2/20$684
This British Airways deal was found by Cheapflights users on 2/19. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:02 pmONT - ATH
2 stops21h 53mBritish Airways
Sun 11/94:40 pmATH - ONT
2 stops35h 09mBritish Airways
Deal found 2/19$694
This Virgin Atlantic deal was found by Cheapflights users on 2/19. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/912:42 pmONT - ATH
1 stop32h 58mVirgin Atlantic
Wed 4/1610:30 amATH - ONT
2 stops23h 11mVirgin Atlantic
Deal found 2/19$874
This oojo deal was found by Cheapflights users on 2/19. 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 10/313:00 pmONT - ATH
2 stops39h 15mIberia
Wed 11/123:55 pmATH - ONT
2 stops41h 50mIberia
Deal found 2/19$926
This Air Canada deal was found by Cheapflights users on 2/19. 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.
Wed 3/195:05 amONT - ATH
3 stops23h 25mAir Canada
Wed 3/267:00 amATH - ONT
3 stops46h 57mAir Canada
Deal found 2/19$945
This Aeromexico deal was found by Cheapflights users on 2/19. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/17:00 amONT - ATH
1 stop38h 40mAir France
Tue 4/1510:30 amATH - ONT
1 stop22h 06mAir France
Deal found 2/19$1,055
This Air Serbia deal was found by Cheapflights users on 2/20. 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.
Mon 5/2610:40 pmONT - ATH
2 stops42h 45mAir Serbia
Mon 6/24:20 pmATH - ONT
2 stops39h 02mAir Serbia
Deal found 2/20$1,102
This KLM deal was found by Cheapflights users on 2/19. 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.
Sat 3/157:00 amONT - SKG
2 stops19h 40mKLM
Sat 3/2210:10 pmSKG - ONT
2 stops27h 32mKLM
Deal found 2/19$1,698

Find flights from Ontario to Greece within your budget

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 February 20, 2025.

Fly from

Ontario

Fly to

Greece

Route

Depart

Return

Price

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 3/18

5:30 pm-9:35 am

2 stops31h 05m

Athens Eleftherios V.

Tue 4/1

10:30 am-10:43 pm

1 stop22h 13m

$537

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 3/19

6:00 am-9:10 am

2 stops18h 10m

Athens Eleftherios V.

Wed 3/26

12:55 pm-12:44 pm

2 stops32h 49m

$608

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 5/1

6:35 pm-6:00 am

2 stops25h 25m

Athens Eleftherios V.

Sun 5/11

7:45 pm-1:16 pm

2 stops27h 31m

$702

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 4/9

4:35 pm-12:50 am

2 stops22h 15m

Athens Eleftherios V.

Wed 4/16

8:45 am-9:58 pm

2 stops23h 13m

$731

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 4/9

12:42 pm-7:40 am

1 stop32h 58m

Athens Eleftherios V.

Wed 4/16

10:30 am-11:41 pm

2 stops23h 11m

$874

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 3/16

1:30 pm-4:35 pm

2 stops18h 05m

Athens Eleftherios V.

Wed 3/26

6:00 am-4:42 pm

2 stops19h 42m

$884

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 3/19

5:05 am-1:30 pm

3 stops23h 25m

Athens Eleftherios V.

Wed 3/26

7:00 am-8:57 pm

3 stops46h 57m

$945

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 4/7

2:44 pm-3:10 pm

2 stops38h 26m

Athens Eleftherios V.

Sun 4/13

3:40 am-10:10 pm

2 stops28h 30m

$1,004

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 4/1

7:00 am-7:40 am

1 stop38h 40m

Athens Eleftherios V.

Tue 4/15

10:30 am-10:36 pm

1 stop22h 06m

$1,055

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 5/26

10:40 pm-3:25 am

2 stops42h 45m

Athens Eleftherios V.

Mon 6/2

4:20 pm-9:22 pm

2 stops39h 02m

$1,102

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 21 results
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2
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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.

Travel insights for flights from Ontario to Greece

Get recent, data-driven insights about flights from Ontario to Greece including ideal travel times, pricing trends, and more.

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 $1,382). 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 February 20, 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 February 20, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Virgin Atlantic 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
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

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
8,220 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

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
1,333 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

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.

Virgin Atlantic
7.5
Good
654 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

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
7.4
Good
1,449 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

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
8,766 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

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 United Airlines. You may also be able to find cheap deals on British Airways and Iberia, with prices starting from $452 and $461, 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 $1,382). 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 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$537Average$909FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$550Average$1,048FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$552Average$825FlexibilityNo cancel feeOn-time71%
DeltaCheapest$571Average$812FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$602Average$1,094FlexibilityNo cancel feeOn-time75%
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