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Greece

$263+ 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Dec 10 — Dec 171
Wed 12/10
Wed 12/17
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 November 10, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$494
(Air France)

One-way from

$263
(American Airlines)

Popular in

June

Cheapest in

February

Average price

$634
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. 18% potential increase in price ($182 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 10, 2025.

This United Airlines deal was found by Cheapflights users on 11/9. 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 11/125:05 amONT - ATH
2 stops20h 30mUnited Airlines
Wed 11/192:20 pmATH - ONT
2 stops18h 31mUnited Airlines
Deal found 11/9$500
This American Airlines deal was found by Cheapflights users on 11/9. 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.
Sun 12/77:03 amONT - ATH
2 stops22h 52mAmerican Airlines
Sat 12/138:05 pmATH - ONT
2 stops32h 13mAmerican Airlines
Deal found 11/9$503
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Tue 11/186:05 amONT - ATH
2 stops18h 00mUnited Airlines
Tue 12/166:25 amATH - ONT
2 stops26h 24mUnited Airlines
Deal found 11/10$505
This United Airlines deal was found by Cheapflights users on 11/9. 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.
Tue 11/111:33 pmONT - ATH
2 stops36h 02mUnited Airlines
Tue 12/166:25 amATH - ONT
2 stops26h 24mUnited Airlines
Deal found 11/9$506
This United Airlines deal was found by Cheapflights users on 11/9. 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 11/261:29 pmONT - ATH
2 stops17h 06mUnited Airlines
Wed 12/36:35 amATH - ONT
2 stops21h 02mUnited Airlines
Deal found 11/9$521
This United Airlines deal was found by Cheapflights users on 11/9. 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.
Sat 11/299:35 pmONT - ATH
2 stops33h 00mUnited Airlines
Tue 12/166:25 amATH - ONT
2 stops26h 24mUnited Airlines
Deal found 11/9$525
This Delta deal was found by Cheapflights users on 11/9. 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 11/116:00 amONT - ATH
2 stops21h 35mDelta
Mon 11/173:25 amATH - ONT
2 stops29h 30mDelta
Deal found 11/9$567
This Delta deal was found by Cheapflights users on 11/10. 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 11/187:05 amONT - ATH
2 stops19h 55mDelta
Mon 12/153:25 amATH - ONT
2 stops23h 42mDelta
Deal found 11/10$573
This United Airlines deal was found by Cheapflights users on 11/10. 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 12/3110:42 amONT - ATH
2 stops19h 53mUnited Airlines
Wed 1/1412:50 pmATH - ONT
2 stops20h 03mUnited Airlines
Deal found 11/10$600
This Ovago deal was found by Cheapflights users on 11/9. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1110:47 amONT - ATH
2 stops19h 28mBritish Airways
Thu 12/257:30 amATH - ONT
2 stops24h 44mBritish Airways
Deal found 11/9$779
This Ovago deal was found by Cheapflights users on 11/9. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1412:46 pmONT - ATH
2 stops20h 29mBritish Airways
Fri 11/217:45 amATH - ONT
2 stops24h 38mBritish Airways
Deal found 11/9$819
This KLM deal was found by Cheapflights users on 11/9. 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.
Wed 11/127:05 amONT - SKG
2 stops19h 45mKLM
Sun 11/1612:25 pmSKG - ONT
2 stops44h 39mKLM
Deal found 11/9$1,854

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 November 10, 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

Thu 1/29

6:00 am-1:35 pm

2 stops21h 35m

Athens Eleftherios V.

Wed 2/4

6:05 am-10:29 pm

2 stops26h 24m

$494

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 1/31

6:00 am-1:40 am

2 stops33h 40m

Athens Eleftherios V.

Sat 2/7

6:30 am-5:43 pm

2 stops45h 13m

$499

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 1/28

6:00 am-1:40 am

2 stops33h 40m

Athens Eleftherios V.

Mon 2/2

6:25 am-10:53 pm

2 stops26h 28m

$499

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 2/7

1:53 pm-1:40 am

2 stops25h 47m

Athens Eleftherios V.

Thu 2/19

6:25 am-10:57 pm

2 stops26h 32m

$499

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 2/11

1:53 pm-1:40 am

2 stops25h 47m

Athens Eleftherios V.

Mon 2/16

6:25 am-12:38 pm

2 stops40h 13m

$499

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 2/10

6:00 am-1:40 am

2 stops33h 40m

Athens Eleftherios V.

Fri 2/20

2:05 pm-5:41 pm

2 stops37h 36m

$499

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 2/12

5:00 am-6:05 pm

2 stops27h 05m

Athens Eleftherios V.

Mon 2/16

6:25 am-12:38 pm

2 stops40h 13m

$499

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 1/30

6:00 am-1:40 am

2 stops33h 40m

Athens Eleftherios V.

Sun 2/8

6:15 am-11:18 am

2 stops39h 03m

$499

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 2/7

1:53 pm-1:40 am

2 stops25h 47m

Athens Eleftherios V.

Sat 2/14

6:30 am-12:38 pm

2 stops40h 08m

$499

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 2/11

6:00 am-1:40 am

2 stops33h 40m

Athens Eleftherios V.

Fri 2/20

2:05 pm-10:57 pm

2 stops18h 52m

$499

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

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 $427). 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.

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 November 10, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to Greece in the afternoon. If you’re flexible enough to do this you can expect to save up to 43% on your trip compared to booking a flight in the morning.

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 November 10, 2025.
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
9,012 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Entertainment

7.1

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
9,012 reviews
United Airlines
7.4
Good
9,012 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Entertainment

7.1

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 33h 40m. United Airlines provides one of the quickest options available for as low as $499. The distance from Ontario to Greece is about 6879 mi.

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

    $263 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on British Airways and United Airlines, with prices starting from $277 and $405, 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, August is the cheapest month in which you can book a flight from Ontario to Greece (average of $427). 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 November 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$635Average$998FlexibilityNo cancel feeOn-time69%

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