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$424+ 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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$555
(Delta)

One-way from

$424
(Gotogate)

Popular in

June

Cheapest in

March

Average price

$1,567
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. 29% potential increase in price ($388 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($56 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Delta deal was found by Cheapflights users on 6/9. 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.
Wed 8/207:05 amONT - ATH
1 stop16h 55mDelta
Thu 8/289:10 amATH - ONT
1 stop20h 01mDelta
Deal found 6/9$555
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Mon 9/87:00 amONT - ATH
1 stop17h 30mUnited Airlines
Fri 9/2610:25 amATH - ONT
2 stops22h 05mUnited Airlines
Deal found 6/10$559
This Iberia deal was found by Cheapflights users on 6/12. 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.
Wed 9/242:54 pmONT - ATH
2 stops23h 56mMultiple Airlines
Mon 10/208:45 pmATH - ONT
2 stops37h 17mMultiple Airlines
Deal found 6/12$588
This Orbitz deal was found by Cheapflights users on 6/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2910:55 amONT - ATH
2 stops29h 05mBritish Airways
Sat 11/87:15 pmATH - ONT
2 stops36h 45mBritish Airways
Deal found 6/11$604
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Tue 8/1911:29 pmONT - ATH
1 stop26h 36mAmerican Airlines
Wed 8/2712:00 pmATH - ONT
1 stop19h 12mAmerican Airlines
Deal found 6/12$630
This KLM deal was found by Cheapflights users on 6/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/217:05 amONT - ATH
1 stop17h 05mKLM
Sat 8/309:10 amATH - ONT
1 stop20h 01mKLM
Deal found 6/10$675
This Air Canada deal was found by Cheapflights users on 6/12. 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 8/195:10 amONT - ATH
3 stops21h 40mAir Canada
Wed 8/272:30 pmATH - ONT
3 stops32h 02mAir Canada
Deal found 6/12$745

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 June 12, 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 8/20

7:05 am-10:00 am

1 stop16h 55m

Athens Eleftherios V.

Thu 8/28

9:10 am-7:11 pm

1 stop20h 01m

$555

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 9/8

7:00 am-10:30 am

1 stop17h 30m

Athens Eleftherios V.

Fri 9/26

10:25 am-10:30 pm

2 stops22h 05m

$559

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 9/24

2:54 pm-12:50 am

2 stops23h 56m

Athens Eleftherios V.

Mon 10/20

8:45 pm-12:02 am

2 stops37h 17m

$588

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 10/29

10:55 am-1:00 am

2 stops29h 05m

Athens Eleftherios V.

Sat 11/8

7:15 pm-10:00 pm

2 stops36h 45m

$604

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 8/19

11:29 pm-12:05 pm

1 stop26h 36m

Athens Eleftherios V.

Wed 8/27

12:00 pm-9:12 pm

1 stop19h 12m

$630

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 8/21

7:05 am-10:10 am

1 stop17h 05m

Athens Eleftherios V.

Sat 8/30

9:10 am-7:11 pm

1 stop20h 01m

$675

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 8/19

5:10 am-12:50 pm

3 stops21h 40m

Athens Eleftherios V.

Wed 8/27

2:30 pm-12:32 pm

3 stops32h 02m

$745

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 10/16

5:05 am-10:05 am

2 stops19h 00m

$424

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 8/10

5:05 am-10:05 am

2 stops19h 00m

$429

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 10/27

8:44 am-10:50 am

2 stops17h 06m

$434

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 18 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 $1,284). 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 June 12, 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.

Rainfall in Athens by month

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

In terms of precipitation, rainfall in Athens 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 Athens when rainfall is around 0.2 in.

Temperature in Athens by month

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

If weather is an important factor for your trip to Athens, 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 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 June 12, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and LOT from Ontario to Athens to help guide your decision. 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
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

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.
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

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.
LOT
7.6
Good
1,077 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

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
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

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.
Virgin Atlantic
7.4
Good
652 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

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, Delta ($555), United Airlines ($559), and British Airways ($604) offers the cheapest pricing from Ontario to Athens. Delta is priced at 41% 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 $424 on Air Canada. Other airlines that offer cheap prices include United Airlines from $429 and KLM from $481 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 $1,284). 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 Ontario?

Book flights to Ontario if you plan to visit one of these locations
Glyfada
Piraeus
Aegina
Loutraki

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Top 3 airlines flying from Ontario to Athens

Discover the top 3 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$940FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$552Average$824FlexibilityNo cancel feeOn-time71%
DeltaCheapest$584Average$812FlexibilityNo cancel feeOn-timeN/A

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