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$420+ 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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 August 14, 2025.

Round-trip from

$543
(Air Canada)

One-way from

$420
(Booking.com)

Popular in

June

Cheapest in

February

Average price

$721
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. 36% potential increase in price ($507 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($63 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 14, 2025.

This Air Canada deal was found by Cheapflights users on 8/14. 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.
Tue 10/215:05 amONT - ATH
2 stops19h 00mAir Canada
Thu 11/201:10 pmATH - ONT
2 stops41h 34mAir Canada
Deal found 8/14$543
This United Airlines deal was found by Cheapflights users on 8/14. 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 10/225:05 amONT - ATH
2 stops18h 50mUnited Airlines
Thu 11/201:10 pmATH - ONT
2 stops43h 21mUnited Airlines
Deal found 8/14$548
This Air Canada deal was found by Cheapflights users on 8/14. 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.
Mon 10/206:27 pmONT - ATH
2 stops29h 38mAir Canada
Tue 11/181:10 pmATH - ONT
2 stops41h 34mAir Canada
Deal found 8/14$549
This Air Canada deal was found by Cheapflights users on 8/14. 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.
Thu 10/236:27 pmONT - ATH
2 stops29h 38mAir Canada
Thu 11/201:10 pmATH - ONT
2 stops41h 34mAir Canada
Deal found 8/14$554
This Air Canada deal was found by Cheapflights users on 8/14. 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.
Fri 10/245:05 amONT - ATH
2 stops43h 15mAir Canada
Tue 11/181:10 pmATH - ONT
2 stops41h 34mAir Canada
Deal found 8/14$555
This Air Canada deal was found by Cheapflights users on 8/14. 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.
Thu 10/236:27 pmONT - ATH
2 stops29h 38mAir Canada
Mon 11/171:10 pmATH - ONT
2 stops41h 34mAir Canada
Deal found 8/14$558
This Air Canada deal was found by Cheapflights users on 8/14. 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.
Fri 10/245:05 amONT - ATH
2 stops43h 15mAir Canada
Mon 11/171:10 pmATH - ONT
2 stops41h 34mAir Canada
Deal found 8/14$559
This Air Canada deal was found by Cheapflights users on 8/14. 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.
Tue 10/215:05 amONT - ATH
2 stops19h 00mAir Canada
Wed 11/1911:55 amATH - ONT
2 stops42h 49mAir Canada
Deal found 8/14$565
This Air Canada deal was found by Cheapflights users on 8/14. 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.
Tue 10/215:05 amONT - ATH
2 stops19h 00mAir Canada
Sun 11/1611:55 amATH - ONT
2 stops42h 49mAir Canada
Deal found 8/14$570
This Air Canada deal was found by Cheapflights users on 8/14. 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.
Mon 10/206:27 pmONT - ATH
2 stops29h 38mAir Canada
Wed 11/1911:55 amATH - ONT
2 stops34h 38mAir Canada
Deal found 8/14$571
This United Airlines deal was found by Cheapflights users on 8/14. 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 11/126:00 amONT - ATH
2 stops19h 35mUnited Airlines
Mon 11/246:15 amATH - ONT
2 stops26h 30mUnited Airlines
Deal found 8/14$575
This Air Canada deal was found by Cheapflights users on 8/14. 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.
Mon 10/206:27 pmONT - ATH
2 stops29h 38mAir Canada
Sun 11/1611:55 amATH - ONT
2 stops42h 49mAir Canada
Deal found 8/14$576

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 August 14, 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

Wed 10/22

5:05 am-10:05 am

2 stops19h 00m

Athens Eleftherios V.

Thu 11/20

1:10 pm-8:44 pm

2 stops41h 34m

$543

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 10/21

5:05 am-10:05 am

2 stops19h 00m

Athens Eleftherios V.

Tue 11/18

1:10 pm-8:44 pm

2 stops41h 34m

$543

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 10/21

5:05 am-10:05 am

2 stops19h 00m

Athens Eleftherios V.

Thu 11/20

1:10 pm-8:44 pm

2 stops41h 34m

$543

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 10/22

5:05 am-10:05 am

2 stops19h 00m

Athens Eleftherios V.

Tue 11/18

1:10 pm-8:44 pm

2 stops41h 34m

$543

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 11/5

6:00 am-11:35 am

2 stops19h 35m

Athens Eleftherios V.

Sat 11/15

1:10 pm-5:34 pm

2 stops38h 24m

$548

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 10/22

5:05 am-9:55 am

2 stops18h 50m

Athens Eleftherios V.

Thu 11/20

1:10 pm-10:31 pm

2 stops43h 21m

$548

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 10/22

5:05 am-10:05 am

2 stops19h 00m

Athens Eleftherios V.

Mon 11/17

1:10 pm-8:44 pm

2 stops41h 34m

$548

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 10/21

5:05 am-10:05 am

2 stops19h 00m

Athens Eleftherios V.

Mon 11/17

1:10 pm-8:44 pm

2 stops41h 34m

$548

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 10/20

6:27 pm-10:05 am

2 stops29h 38m

Athens Eleftherios V.

Tue 11/18

1:10 pm-8:44 pm

2 stops41h 34m

$549

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 10/20

6:27 pm-10:05 am

2 stops29h 38m

Athens Eleftherios V.

Thu 11/20

1:10 pm-8:44 pm

2 stops41h 34m

$549

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 22 results
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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, November is the cheapest month in which you can book a flight from Ontario to Athens (average of $679). Flying from Ontario to Athens in June is currently the most expensive (average of $1,286). 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 August 14, 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 26% 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 Tuesday mornings 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 August 14, 2025.
Read reviews from past customers who have flown Delta and 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.
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

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
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

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
8,916 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

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

  • What are the cheapest airlines flying from Ontario to Athens round-trip?

    According to our current data, United Airlines ($550), and Delta ($602) offers the cheapest pricing from Ontario to Athens. United Airlines is priced at 38% lower than the current average price of a flight leaving 3 months from now.

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

    One-way options have recently been found by users for as low as $420 on Air Canada. Other airlines that offer cheap prices include KLM from $424 and Delta from $429 one-way.

  • 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, November is the cheapest month in which you can book a flight from Ontario to Athens (average of $679). Flying from Ontario to Athens in June is currently the most expensive (average of $1,286). 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
Loutraki

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Top 2 airlines flying from Ontario to Athens

Discover the top 2 airlines 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$955FlexibilityNo cancel feeOn-time69%
DeltaCheapest$602Average$812FlexibilityNo cancel feeOn-timeN/A

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