HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Greece

$519+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Greece 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 Greece

Keep the following information in mind while searching for Ontario to Greece flight deals. Data was last updated March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$709
(United Airlines)

One-way from

$519
(United Airlines)

Popular in

June

Cheapest in

November

Average price

$675
Provider with most accurate pricing for Los Angeles-Athens Eleftherios V. flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Athens Eleftherios V. flights.
Search Deals
From Ontario to Greece
Search Deals
One-way flight from Ontario to Greece
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($287 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

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 March 28, 2025.

This United Airlines deal was found by Cheapflights users on 3/27. 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 5/56:00 amONT - ATH
2 stops22h 00mUnited Airlines
Tue 5/2011:45 amATH - ONT
2 stops34h 39mUnited Airlines
Deal found 3/27$709
This American Airlines deal was found by Cheapflights users on 3/27. 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.
Fri 3/2811:59 pmONT - ATH
2 stops25h 11mAmerican Airlines
Thu 4/101:00 pmATH - ONT
2 stops30h 54mAmerican Airlines
Deal found 3/27$746
This Delta deal was found by Cheapflights users on 3/27. 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 4/112:46 pmONT - ATH
1 stop32h 54mDelta
Tue 4/1510:30 amATH - ONT
1 stop22h 06mDelta
Deal found 3/27$761
This Gurufare deal was found by Cheapflights users on 3/27. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3012:49 pmONT - ATH
2 stops27h 21mBritish Airways
Sun 10/128:40 pmATH - ONT
2 stops29h 56mBritish Airways
Deal found 3/27$817
This Air Canada deal was found by Cheapflights users on 3/27. 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.
Sat 8/96:00 amONT - ATH
2 stops18h 05mMultiple Airlines
Tue 8/2612:10 pmATH - ONT
2 stops19h 46mMultiple Airlines
Deal found 3/27$905
This British Airways deal was found by Cheapflights users on 3/27. 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.
Thu 10/26:38 amONT - SKG
2 stops42h 47mBritish Airways
Fri 10/104:15 pmSKG - ONT
2 stops41h 47mBritish Airways
Deal found 3/27$913
This KLM deal was found by Cheapflights users on 3/27. 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.
Mon 5/510:15 pmONT - ATH
1 stop26h 40mKLM
Tue 5/209:10 amATH - ONT
1 stop23h 19mKLM
Deal found 3/27$927
This Air France deal was found by Cheapflights users on 3/27. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/512:07 pmONT - ATH
2 stops18h 58mAir France
Mon 5/193:25 amATH - ONT
2 stops22h 52mAir France
Deal found 3/27$969
This Air Serbia deal was found by Cheapflights users on 3/27. 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 Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1110:59 pmONT - ATH
2 stops30h 41mAir Serbia
Mon 5/194:30 amATH - ONT
2 stops26h 41mAir Serbia
Deal found 3/27$1,138
This American Airlines deal was found by Cheapflights users on 3/27. 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.
Thu 10/26:38 amONT - SKG
2 stops21h 47mMultiple Airlines
Fri 10/104:15 pmSKG - ONT
3 stops29h 20mMultiple Airlines
Deal found 3/27$1,144
This Air Canada deal was found by Cheapflights users on 3/27. 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 3/285:05 amONT - ATH
3 stops23h 25mAir Canada
Thu 4/101:10 pmATH - ONT
3 stops33h 28mAir Canada
Deal found 3/27$1,185
This KAYAK deal was found by Cheapflights users on 3/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/252:39 pmONT - ATH
2 stops26h 51mIberia
Mon 8/44:10 amATH - ONT
2 stops28h 53mIberia
Deal found 3/26$1,341

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 March 28, 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

Mon 5/5

6:00 am-2:00 pm

2 stops22h 00m

Athens Eleftherios V.

Tue 5/20

11:45 am-12:24 pm

2 stops34h 39m

$709

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 5/5

2:35 pm-8:20 am

2 stops31h 45m

Athens Eleftherios V.

Tue 5/20

9:10 am-10:29 pm

1 stop23h 19m

$807

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 4/9

4:35 pm-12:50 am

2 stops22h 15m

Athens Eleftherios V.

Tue 5/13

6:55 am-9:57 pm

2 stops25h 02m

$832

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 8/9

6:00 am-10:05 am

2 stops18h 05m

Athens Eleftherios V.

Tue 8/26

12:10 pm-9:56 pm

2 stops19h 46m

$905

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 5/5

10:15 pm-10:55 am

1 stop26h 40m

Athens Eleftherios V.

Tue 5/20

9:10 am-10:29 pm

1 stop23h 19m

$927

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 5/5

12:07 pm-5:05 pm

2 stops18h 58m

Athens Eleftherios V.

Mon 5/19

3:25 am-4:17 pm

2 stops22h 52m

$969

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 7/19

4:45 pm-12:55 am

2 stops22h 10m

Athens Eleftherios V.

Wed 7/30

12:00 pm-9:38 pm

1 stop19h 38m

$1,026

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 5/11

10:59 pm-3:40 pm

2 stops30h 41m

Athens Eleftherios V.

Mon 5/19

4:30 am-9:11 pm

2 stops26h 41m

$1,138

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 7/25

2:39 pm-3:30 am

2 stops26h 51m

Athens Eleftherios V.

Mon 8/4

4:10 am-11:03 pm

2 stops28h 53m

$1,341

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 8/18

7:00 am-10:05 am

2 stops41h 05m

$519

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 20 results
1
2

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, November is the cheapest month in which you can book a flight from Ontario to Greece (average of $679). Flying from Ontario to Greece in June is currently the most expensive (average of $1,347). 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 March 28, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Greece as you normally would.

Rainfall in Greece by month

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

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

Temperature in Greece by month

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

If weather is an important factor for your trip to Greece, 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 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 March 28, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Air France from Ontario to Greece to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

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
7,896 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

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
1,321 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

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.
Air France
7.4
Good
1,424 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

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
8,603 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

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.
Turkish Airlines
7.3
Good
3,744 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

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 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.

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

    $519 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on KLM and Iberia, with prices starting from $586 and $599, 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, November is the cheapest month in which you can book a flight from Ontario to Greece (average of $679). Flying from Ontario to Greece in June is currently the most expensive (average of $1,347). 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

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.

Alternative routes for Ontario to Greece

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Heathrow flights
San Francisco to Heathrow flights
San Francisco to Charles de Gaulle flights
Los Angeles to Charles de Gaulle flights
San Francisco to Leonardo da Vinci/Fiumicino flights
Los Angeles to Leonardo da Vinci/Fiumicino flights
Los Angeles to Barcelona-El Prat flights
Los Angeles to London City flights
Los Angeles to Madrid flights
Los Angeles to Istanbul flights
San Francisco to Barcelona-El Prat flights
San Francisco to Orly flights
San Francisco to Gatwick flights
San Francisco to London City flights
Los Angeles to Frankfurt flights
Los Angeles to Amsterdam flights
Los Angeles to Dublin flights
Los Angeles to Gatwick flights
San Francisco to Istanbul flights
San Francisco to Dublin flights
Los Angeles to Orly flights
San Francisco to Amsterdam flights
San Francisco to Frankfurt flights
San Diego to Heathrow flights
Los Angeles to Athens flights
Los Angeles to Lisbon flights
San Francisco to Lisbon flights
San Francisco to Zurich flights
Los Angeles to Zurich flights
Los Angeles to Palma de Mallorca flights
Ontario to Heathrow flights
San Francisco to Madrid flights
Ontario to Palma de Mallorca flights
San Francisco to Malpensa flights
San Francisco to Athens flights
San Francisco to Copenhagen flights
Los Angeles to Copenhagen flights
Los Angeles to Munich flights
San Francisco to Linate flights
Los Angeles to Malpensa flights
Ontario to Leonardo da Vinci/Fiumicino flights
Los Angeles to Luton flights
Ontario to Charles de Gaulle flights
San Francisco to Munich flights
Los Angeles to Linate flights
Los Angeles to Sabiha Gokcen flights
Las Vegas to Heathrow flights
Los Angeles to Frederic Chopin flights
Burbank to Charles de Gaulle flights
San Jose to Charles de Gaulle flights

Top 5 airlines flying from Ontario to Greece

Discover the top 5 airlines 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$537Average$894FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$550Average$1,098FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$552Average$824FlexibilityNo cancel feeOn-time71%
DeltaCheapest$571Average$812FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$602Average$1,371FlexibilityNo cancel feeOn-time75%
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.