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$380+ Cheap flights from Ontario (ONT) to Athens (ATH)

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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
nov. 30 — déc. 71
dim. 11/30
dim. 12/7
1 adult, Economy
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Cheap flight deals from Ontario to Athens

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Athens (ATH). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated octobre 31, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$479
(Delta)

One-way from

$380
(Kiwi.com)

Popular in

June

Cheapest in

March

Average price

$836
Provider with most accurate pricing for Ontario-Athens Eleftherios V. flight deals.
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Provider most trusted by Cheapflights users for Ontario-Athens Eleftherios V. flights.
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From Ontario to Athens Eleftherios V.
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One-way flight from Ontario to Athens Eleftherios V.
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Highest demand for flights based on searches. 32% potential increase in price ($447 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($64 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Ontario to Athens

Cheapest flights from Ontario to Athens
Explore the most affordable flight options available from Ontario to Athens. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octobre 31, 2025.

This Delta deal was found by Cheapflights users on 10/30. 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.
jeu. 11/2712:16 pmONT - ATH
2 stops36h 19mDelta
mer. 12/1012:50 pmATH - ONT
2 stops40h 49mDelta
Deal found 10/30$479
This Air Canada deal was found by Cheapflights users on 10/30. 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.
mer. 11/125:05 amONT - ATH
2 stops20h 30mMultiple Airlines
mer. 11/1911:55 amATH - ONT
2 stops34h 42mMultiple Airlines
Deal found 10/30$503
This United Airlines deal was found by Cheapflights users on 10/30. 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. 11/116:05 amONT - ATH
2 stops18h 00mUnited Airlines
jeu. 1/226:25 amATH - ONT
2 stops21h 18mUnited Airlines
Deal found 10/30$506
This United Airlines deal was found by Cheapflights users on 10/29. 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.
mer. 11/261:29 pmONT - ATH
2 stops17h 06mUnited Airlines
sam. 12/66:35 amATH - ONT
2 stops21h 02mUnited Airlines
Deal found 10/29$542
This United Airlines deal was found by Cheapflights users on 10/29. 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.
sam. 12/61:34 pmONT - ATH
2 stops17h 01mUnited Airlines
dim. 12/1412:50 pmATH - ONT
2 stops19h 59mUnited Airlines
Deal found 10/29$562
This United Airlines deal was found by Cheapflights users on 10/30. 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.
jeu. 11/136:05 amONT - ATH
2 stops18h 00mUnited Airlines
dim. 11/2312:50 pmATH - ONT
2 stops19h 41mUnited Airlines
Deal found 10/30$607
This United Airlines deal was found by Cheapflights users on 10/31. 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. 12/295:05 amONT - ATH
2 stops33h 20mUnited Airlines
dim. 1/112:00 pmATH - ONT
2 stops42h 53mUnited Airlines
Deal found 10/31$616
This Delta deal was found by Cheapflights users on 10/30. 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.
sam. 11/86:00 amONT - ATH
2 stops21h 35mDelta
ven. 11/143:25 amATH - ONT
2 stops22h 44mDelta
Deal found 10/30$620
This United Airlines deal was found by Cheapflights users on 10/30. 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.
mer. 12/101:34 pmONT - ATH
2 stops24h 51mUnited Airlines
mer. 12/176:15 amATH - ONT
2 stops21h 20mUnited Airlines
Deal found 10/30$689
This Delta deal was found by Cheapflights users on 10/29. 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.
sam. 11/221:20 pmONT - ATH
2 stops38h 15mDelta
lun. 12/11:45 pmATH - ONT
2 stops44h 13mDelta
Deal found 10/29$706
This Delta deal was found by Cheapflights users on 10/29. 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.
dim. 11/2310:25 pmONT - ATH
2 stops29h 10mDelta
lun. 12/11:45 pmATH - ONT
2 stops44h 13mDelta
Deal found 10/29$707

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Athens 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 octobre 31, 2025.
Use the filters below to find and compare flights from Ontario to Athens that are best for you.

Fly from

Ontario

Fly to

Athens

Route

Depart

Return

Price

OntarioAthens

ONT - ATH

ONTATH

Ontario

jeu. 11/27

12:16 pm-10:35 am

2 stops36h 19m

Athens Eleftherios V.

mer. 12/10

12:50 pm-7:39 pm

2 stops40h 49m

$479

OntarioAthens

ONT - ATH

ONTATH

Ontario

ven. 2/13

5:00 am-6:05 pm

2 stops27h 05m

Athens Eleftherios V.

ven. 2/27

6:05 am-12:47 pm

2 stops40h 42m

$500

OntarioAthens

ONT - ATH

ONTATH

Ontario

jeu. 2/12

1:45 pm-6:05 pm

2 stops42h 20m

Athens Eleftherios V.

ven. 2/27

6:05 am-5:41 pm

2 stops21h 36m

$500

OntarioAthens

ONT - ATH

ONTATH

Ontario

mer. 11/12

5:05 am-11:35 am

2 stops20h 30m

Athens Eleftherios V.

mer. 11/19

11:55 am-12:37 pm

2 stops34h 42m

$503

OntarioAthens

ONT - ATH

ONTATH

Ontario

mar. 11/11

6:05 am-10:05 am

2 stops18h 00m

Athens Eleftherios V.

jeu. 1/22

6:25 am-5:43 pm

2 stops21h 18m

$506

OntarioAthens

ONT - ATH

ONTATH

Ontario

mer. 11/26

1:29 pm-4:35 pm

2 stops17h 06m

Athens Eleftherios V.

sam. 12/6

6:35 am-5:37 pm

2 stops21h 02m

$542

OntarioAthens

ONT - ATH

ONTATH

Ontario

jeu. 11/13

6:05 am-10:05 am

2 stops18h 00m

Athens Eleftherios V.

dim. 11/23

12:50 pm-10:31 pm

2 stops19h 41m

$607

OntarioAthens

ONT - ATH

ONTATH

Ontario

lun. 12/29

5:05 am-12:25 am

2 stops33h 20m

Athens Eleftherios V.

dim. 1/11

2:00 pm-10:53 pm

2 stops42h 53m

$616

OntarioAthens

ONT - ATH

ONTATH

Ontario

mar. 4/28

4:15 pm-11:10 pm

2 stops20h 55m

Athens Eleftherios V.

mar. 5/12

12:35 pm-10:26 pm

1 stop19h 51m

$657

OntarioAthens

ONT - ATH

ONTATH

Ontario

lun. 4/20

1:33 pm-7:10 pm

2 stops19h 37m

Athens Eleftherios V.

dim. 5/3

6:20 am-5:46 pm

2 stops21h 26m

$669

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 22 results
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Compare providers for flights from Ontario to Athens

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Athens in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Athens flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Athens flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Athens flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Athens flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Athens flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Athens

Have a flexible travel schedule? Discover the best time to fly to Athens 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 Athens

What is the cheapest month to book a flight from Ontario to Athens?

Currently, August is the cheapest month in which you can book a flight from Ontario to Athens (average of $433). Flying from Ontario to Athens 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 ATH?

Find hourly flight availability from Ontario to Athens. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated octobre 31, 2025.

When flying from Ontario to Athens, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 25% versus a flight at noon.

What is the cheapest day to fly from Ontario to Athens?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Athens. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ontario to Athens flight should consider departing on Monday afternoons when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Athens

Get insights into the airlines that provide service to Athens. 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 Athens. Reviews last updated octobre 31, 2025.
Read reviews from past customers who have flown United Airlines from Ontario to Athens. 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
8,999 reviews

Boarding

7.7

Entertainment

7.1

Food

6.6

Comfort

7.3

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
8,999 reviews
United Airlines
7.4
Good
8,999 reviews

Boarding

7.7

Entertainment

7.1

Food

6.6

Comfort

7.3

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 Athens. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Athens?

    Airlines like Delta and United Airlines fly from Ontario to Athens in about 27h 05m. The time it takes to get you to your destination can typically vary by up to 9h 14m. Ontario and Athens are separated by a distance of 6879 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Ontario to Athens round-trip?

    According to our current data, United Airlines ($635), offers the cheapest pricing from Ontario to Athens. United Airlines is priced at 33% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Ontario to Athens that include hotel bookings?

    Yes. In addition to deals on Ontario to Athens flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Athens?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Athens.

  • Can I find deals for business class flights from Ontario to Athens?

    Yes. Cheapflights offers flight deals from Ontario to Athens 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 Athens?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Athens (average of $433). Flying from Ontario to Athens 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

Traveling to a place near Athens?

Book flights to Athens if you plan to visit one of these locations
Glyfada
Piraeus
Tolo
Galaxidi

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Top airline flying from Ontario to Athens

Discover the top airline that operate flights from Ontario to Athens. 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 octobre 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$635Average$998FlexibilityNo cancel feeOn-time69%

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