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$510+ Cheap flights from Greece to Ontario (ONT)

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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
ATH — ONT
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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Cheap flight deals from Greece to Ontario

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

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$776
(KLM)

One-way from

$510
(Mytrip)

Popular in

July

Cheapest in

March

Average price

$784
Provider with most accurate pricing for Athens Eleftherios V.-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Athens Eleftherios V.-Los Angeles flights.
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From Greece to Ontario
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One-way flight from Greece to Ontario
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Highest demand for flights based on searches. 8% potential increase in price ($87 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from Greece to Ontario

Cheapest flights from Greece to Ontario
Explore the most affordable flight options available from Greece to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

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.
Tue 4/86:00 amATH - ONT
2 stops26h 36mKLM
Fri 4/1810:15 pmONT - ATH
1 stop26h 40mKLM
Deal found 3/27$776
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.
Thu 4/1010:30 amATH - ONT
1 stop22h 06mDelta
Sat 4/267:00 amONT - ATH
1 stop17h 55mDelta
Deal found 3/27$875
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.
Wed 7/1612:35 pmATH - ONT
1 stop19h 36mUnited Airlines
Wed 8/67:00 amONT - ATH
1 stop17h 30mUnited Airlines
Deal found 3/27$1,042
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.
Mon 6/234:30 amATH - ONT
2 stops28h 00mAir Serbia
Sun 8/1711:45 pmONT - ATH
2 stops41h 40mAir Serbia
Deal found 3/27$1,131
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.
Tue 4/81:10 pmATH - ONT
3 stops33h 28mMultiple Airlines
Fri 4/186:00 amONT - ATH
2 stops19h 10mMultiple Airlines
Deal found 3/27$1,590
This Qatar 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/278:00 pmATH - ONT
2 stops31h 30mQatar Airways
Sun 5/411:46 amONT - ATH
2 stops38h 39mQatar Airways
Deal found 3/27$1,594
This Etihad 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/151:55 pmATH - ONT
2 stops41h 16mEtihad Airways
Sat 5/3110:59 pmONT - ATH
2 stops45h 11mEtihad Airways
Deal found 3/27$3,812

Cheapflights Fare Finder

Customize your flight search to find flights from Greece to Ontario 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 Greece to Ontario that are best for you.

Fly from

Greece

Fly to

Ontario

Route

Depart

Return

Price

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Tue 4/8

6:00 am-10:36 pm

2 stops26h 36m

Ontario

Fri 4/18

10:15 pm-10:55 am

1 stop26h 40m

$776

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Thu 4/10

10:30 am-10:36 pm

1 stop22h 06m

Ontario

Sat 4/26

7:00 am-10:55 am

1 stop17h 55m

$875

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Wed 7/16

12:35 pm-10:11 pm

1 stop19h 36m

Ontario

Wed 8/6

7:00 am-10:30 am

1 stop17h 30m

$1,042

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Mon 6/23

4:30 am-10:30 pm

2 stops28h 00m

Ontario

Sun 8/17

11:45 pm-3:25 am

2 stops41h 40m

$1,131

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Tue 4/8

1:10 pm-12:38 pm

3 stops33h 28m

Ontario

Fri 4/18

6:00 am-11:10 am

2 stops19h 10m

$1,590

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sun 4/27

8:00 pm-5:30 pm

2 stops31h 30m

Ontario

Sun 5/4

11:46 am-12:25 pm

2 stops38h 39m

$1,594

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Thu 5/15

1:55 pm-9:11 pm

2 stops41h 16m

Ontario

Sat 5/31

10:59 pm-6:10 am

2 stops45h 11m

$3,812

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Mon 5/12

6:30 am-12:38 pm

3 stops40h 08m

$510

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Tue 6/17

4:25 pm-10:30 pm

2 stops40h 05m

$666

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Thu 7/3

12:00 pm-9:33 pm

1 stop19h 33m

$773

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 15 results
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Best time to book a flight from Greece to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Greece 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 Greece to Ontario

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

Currently, August is the cheapest month in which you can book a flight from Greece to Ontario (average of $246). Flying from Greece to Ontario in March is currently the most expensive (average of $326). 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.

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated March 28, 2025.
Delta
8.0
Very good
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,896 reviews
Delta
8.0
Very good
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very good
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Qatar Airways
7.4
Good
3,538 reviews
Delta
8.0
Very good
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Etihad Airways
7.4
Good
1,181 reviews
Delta
8.0
Very good
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,603 reviews
Delta
8.0
Very good
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Greece to Ontario. 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 into for flights to Ontario from Greece?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from Greece. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

    The cheapest airlines for a one-way flight from Greece to Ontario are Air Serbia ($666), American Airlines ($773), and Iberia ($801).

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Greece to Ontario (average of $246). Flying from Greece to Ontario in March is currently the most expensive (average of $326). 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

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Alternative routes for Greece to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Greece to Ontario

Discover the top airline that operate flights from Greece to Ontario. 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
United AirlinesCheapest$913Average$1,037FlexibilityNo cancel feeOn-time69%
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