HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Athens

$313+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Athens with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 30, 2025.

Round-trip from

$499
(United Airlines)

One-way from

$313
(Kiwi.com)

Popular in

June

Cheapest in

March

Average price

$1,567
From Ontario to Athens Eleftherios V.
Search Deals
One-way flight from Ontario to Athens Eleftherios V.
Search Deals
Highest demand for flights based on searches. 29% potential increase in price ($396 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($58 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

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 30, 2025.

This United Airlines deal was found by Cheapflights users on 6/30. 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.
Wed 10/155:05 amONT - ATH
2 stops19h 00mUnited Airlines
Wed 11/56:15 amATH - ONT
2 stops21h 19mUnited Airlines
Deal found 6/30$499
This Air Canada deal was found by Cheapflights users on 6/30. 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.
Wed 8/205:10 amONT - ATH
2 stops22h 50mAir Canada
Thu 8/284:00 pmATH - ONT
2 stops30h 32mAir Canada
Deal found 6/30$533
This KLM deal was found by Cheapflights users on 6/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/247:05 amONT - ATH
1 stop17h 50mKLM
Wed 9/39:10 amATH - ONT
1 stop20h 01mKLM
Deal found 6/30$548
This Delta deal was found by Cheapflights users on 6/29. 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.
Sat 9/135:40 pmONT - ATH
2 stops28h 40mDelta
Tue 9/239:10 amATH - ONT
1 stop20h 05mDelta
Deal found 6/29$560
This Iberia deal was found by Cheapflights users on 6/30. 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 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 stops35h 57mMultiple Airlines
Deal found 6/30$582
This British Airways deal was found by Cheapflights users on 6/28. 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.
Wed 9/242:54 pmONT - ATH
2 stops23h 56mBritish Airways
Mon 10/208:45 pmATH - ONT
2 stops31h 00mBritish Airways
Deal found 6/28$589
This Virgin Atlantic deal was found by Cheapflights users on 6/30. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/137:05 amONT - ATH
1 stop17h 05mVirgin Atlantic
Tue 9/231:05 pmATH - ONT
2 stops20h 37mVirgin Atlantic
Deal found 6/30$620
This Iberia deal was found by Cheapflights users on 6/30. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/268:14 amONT - ATH
2 stops20h 56mIberia
Wed 9/310:35 pmATH - ONT
2 stops30h 19mIberia
Deal found 6/30$651

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 30, 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 10/15

5:05 am-10:05 am

2 stops19h 00m

Athens Eleftherios V.

Wed 11/5

6:15 am-5:34 pm

2 stops21h 19m

$499

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 8/20

5:10 am-2:00 pm

2 stops22h 50m

Athens Eleftherios V.

Thu 8/28

4:00 pm-12:32 pm

2 stops30h 32m

$533

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 8/24

7:05 am-10:55 am

1 stop17h 50m

Athens Eleftherios V.

Wed 9/3

9:10 am-7:11 pm

1 stop20h 01m

$548

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 9/13

5:40 pm-8:20 am

2 stops28h 40m

Athens Eleftherios V.

Tue 9/23

9:10 am-7:15 pm

1 stop20h 05m

$560

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-10:42 pm

2 stops35h 57m

$582

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-5:45 pm

2 stops31h 00m

$589

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 9/13

7:05 am-10:10 am

1 stop17h 05m

Athens Eleftherios V.

Tue 9/23

1:05 pm-11:42 pm

2 stops20h 37m

$620

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 8/26

8:14 am-3:10 pm

2 stops20h 56m

Athens Eleftherios V.

Wed 9/3

10:35 pm-6:54 pm

2 stops30h 19m

$651

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 9/26

7:30 pm-6:00 am

2 stops24h 30m

$313

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 11/10

7:00 am-10:10 am

2 stops17h 10m

$399

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

Showing 1-10 of 16 results
1
2

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 $1,288). 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 30, 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 June 30, 2025.
Read reviews from past customers who have flown Delta, KLM, 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
7,969 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

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
7,969 reviews
Delta
8.0
Very good
7,969 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

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
1,366 reviews
Delta
8.0
Very good
7,969 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

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
8,852 reviews
Delta
8.0
Very good
7,969 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

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
654 reviews
Delta
8.0
Very good
7,969 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

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.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,969 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

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 ($499), Air Canada ($533), and KLM ($548) offers the cheapest pricing from Ontario to Athens. United Airlines is priced at 46% 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 $399 on United Airlines. Other airlines that offer cheap prices include Air Canada from $441 and KLM from $483 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 $1,288). 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
Tolo
Aegina
Loutraki

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$955FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$552Average$815FlexibilityNo cancel feeOn-time71%
DeltaCheapest$571Average$812FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.