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

$494 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 American Airlines and Delta, with prices starting from $509 and $534, respectively.

What are the most popular airlines that fly from Ontario to Greece?

Before booking your flight from Ontario to Greece check out the most popular airlines for this route: American Airlines, Delta or KLM.

How far in advance should I book a flight from Ontario to Greece?

To save up to 7% on this flight, we recommend booking at least 24 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Ontario to Greece from $803 1-2 weeks out and tickets from $823 for flights departing within the next 72 hours.

What is the cheapest month to fly from Ontario to Greece?

November can be a great time to fly to Greece from Ontario with a flight ticket averaging about $838. Cheapflights users have found deals in the month of November for as cheap as $474. The most expensive prices can be found in the month of June.

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.

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.

$1,027+ Flights from Ontario to Greece - Compare & Save Big

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Cheap flight deals from Ontario to Greece

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$638 (Iberia)
One-way from	$469 (Kiwi.com)
Popular in	June
Cheapest in	November
Average price	$963

Provider with most accurate pricing for Los Angeles-Athens Eleftherios V. flight deals.

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Provider most trusted by Cheapflights users for Los Angeles-Athens Eleftherios V. flights.

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From Ontario to Greece

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One-way flight from Ontario to Greece

Search Deals

Highest demand for flights based on searches. 23% potential increase in price ($255 potential increase over avg. RT price).

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Cheapest flight prices on average. 4% potential price decrease ($34 potential savings vs. average RT price).

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Average for round-trip flights in May 2025

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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 May 1, 2025.

Wed 9/243:00 pmONT - ATH

2 stops23h 50mMultiple Airlines

Mon 10/208:45 pmATH - ONT

2 stops37h 17mMultiple Airlines

Deal found 4/30

$638

Fri 12/510:40 amONT - ATH

2 stops19h 45mUnited Airlines

Fri 12/127:00 amATH - ONT

2 stops23h 17mUnited Airlines

Deal found 4/30

$655

Tue 10/1410:55 amONT - ATH

2 stops19h 45mBritish Airways

Tue 10/218:00 pmATH - ONT

2 stops35h 40mBritish Airways

Deal found 4/30

$676

Sat 9/2010:59 pmONT - ATH

1 stop25h 56mDelta

Thu 10/26:30 amATH - ONT

2 stops20h 47mDelta

Deal found 4/29

$732

Sun 9/215:10 amONT - ATH

2 stops18h 55mAir Canada

Wed 10/13:30 pmATH - ONT

2 stops31h 02mAir Canada

Deal found 4/29

$738

Thu 5/157:05 amONT - ATH

1 stop16h 55mAir France

Fri 5/233:25 amATH - ONT

2 stops22h 52mAir France

Deal found 5/1

$832

Wed 6/117:05 amONT - ATH

2 stops20h 15mVirgin Atlantic

Wed 9/101:05 pmATH - ONT

2 stops20h 41mVirgin Atlantic

Deal found 4/30

$838

Wed 8/67:05 amONT - ATH

1 stop16h 55mKLM

Tue 8/2612:10 pmATH - ONT

1 stop20h 19mKLM

Deal found 4/30

$864

Sun 7/64:44 pmONT - ATH

2 stops22h 01mAmerican Airlines

Tue 7/1512:00 pmATH - ONT

1 stop19h 38mAmerican Airlines

Deal found 4/30

$922

Mon 10/2710:55 amONT - ATH

2 stops19h 20mIberia

Mon 11/103:55 pmATH - ONT

2 stops27h 33mIberia

Deal found 4/30

$1,096

Mon 9/2911:00 pmONT - ATH

2 stops29h 55mAir Serbia

Mon 10/134:30 amATH - ONT

2 stops27h 11mAir Serbia

Deal found 4/30

$1,197

Thu 5/87:05 amONT - SKG

2 stops18h 00mKLM

Wed 5/2111:20 amSKG - ONT

2 stops22h 22mKLM

Deal found 4/30

$1,764

Best flights from Ontario to Greece
Discover carefully curated flight deals from Ontario to Greece that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 1, 2025.

Wed 9/243:00 pmONT - ATH

2 stops23h 50mMultiple Airlines

Mon 10/208:45 pmATH - ONT

2 stops37h 17mMultiple Airlines

Deal found 4/30

$638

Tue 9/306:04 amONT - ATH

2 stops21h 26mUnited Airlines

Tue 10/146:00 amATH - ONT

2 stops26h 52mUnited Airlines

Deal found 4/30

$682

Sun 8/175:05 amONT - ATH

2 stops19h 00mAir Canada

Wed 9/173:30 pmATH - ONT

2 stops31h 02mAir Canada

Deal found 4/29

$689

Sat 8/1612:00 pmONT - ATH

1 stop36h 00mDelta

Fri 8/299:10 amATH - ONT

1 stop20h 19mDelta

Deal found 4/29

$698

Wed 9/173:00 pmONT - ATH

2 stops25h 25mBritish Airways

Mon 9/298:45 pmATH - ONT

2 stops34h 55mBritish Airways

Deal found 4/29

$760

Thu 5/157:05 amONT - ATH

1 stop16h 55mAir France

Fri 5/233:25 amATH - ONT

2 stops22h 52mAir France

Deal found 4/30

$893

Tue 8/197:00 amONT - ATH

1 stop17h 55mKLM

Tue 9/169:10 amATH - ONT

1 stop23h 31mKLM

Deal found 4/29

$906

Sun 7/64:44 pmONT - ATH

2 stops22h 01mAmerican Airlines

Tue 7/1512:00 pmATH - ONT

1 stop19h 38mAmerican Airlines

Deal found 4/30

$922

Tue 9/2310:54 amONT - ATH

2 stops42h 16mIberia

Fri 10/33:50 amATH - ONT

2 stops29h 46mIberia

Deal found 4/29

$1,068

Mon 9/2911:00 pmONT - ATH

2 stops29h 55mAir Serbia

Mon 10/134:20 pmATH - ONT

2 stops39h 21mAir Serbia

Deal found 4/30

$1,111

Fri 7/411:59 pmONT - ATH

2 stops34h 31mTurkish Airlines

Thu 7/103:55 amATH - ONT

2 stops28h 35mTurkish Airlines

Deal found 4/29

$1,400

Thu 5/227:30 amONT - SKG

2 stops20h 55mBritish Airways

Thu 5/291:00 pmSKG - ONT

2 stops20h 43mBritish Airways

Deal found 4/29

$2,729

Last-minute flights from Ontario to Greece
Discover last-minute flight deals from Ontario to Greece. Data last updated May 1, 2025 and is based on user searches.

Sat 5/310:54 amONT - ATH

2 stops18h 16mIberia

Sun 5/113:50 pmATH - ONT

2 stops36h 46mIberia

Deal found 4/30

$1,910

Sun 5/410:40 pmONT - ATH

2 stops31h 00mAir Serbia

Mon 5/124:30 amATH - ONT

2 stops26h 41mAir Serbia

Deal found 4/30

$1,230

Wed 5/77:05 amONT - ATH

1 stop17h 50mKLM

Wed 5/1410:15 amATH - ONT

1 stop22h 14mKLM

Deal found 4/30

$1,027

Thu 5/87:05 amONT - SKG

2 stops18h 00mKLM

Wed 5/2111:20 amSKG - ONT

2 stops22h 22mKLM

Deal found 4/30

$1,764

Wed 5/147:05 amONT - ATH

1 stop17h 50mDelta

Fri 5/239:10 amATH - ONT

1 stop23h 19mDelta

Deal found 4/30

$754

Wed 5/1412:41 pmONT - ATH

2 stops26h 09mBritish Airways

Sat 5/248:35 pmATH - ONT

2 stops31h 48mBritish Airways

Deal found 4/30

$1,474

Thu 5/157:05 amONT - ATH

1 stop16h 55mAir France

Sat 5/246:30 amATH - ONT

2 stops19h 47mAir France

Deal found 5/1

$832

Thu 5/155:05 amONT - ATH

2 stops27h 30mUnited Airlines

Sat 5/2412:10 pmATH - ONT

2 stops39h 29mUnited Airlines

Deal found 5/1

$844

Fri 5/167:05 amONT - ATH

1 stop17h 50mKLM

Tue 5/2012:10 pmATH - ONT

1 stop20h 19mKLM

Deal found 4/30

$969

Mon 5/1911:59 pmONT - ATH

2 stops23h 16mAmerican Airlines

Sat 5/248:35 pmATH - ONT

2 stops31h 48mAmerican Airlines

Deal found 4/30

$1,343

Mon 5/197:05 amONT - ATH

1 stop17h 50mVirgin Atlantic

Sat 5/2410:30 amATH - ONT

2 stops21h 46mVirgin Atlantic

Deal found 4/30

$4,025

Thu 5/227:30 amONT - SKG

2 stops20h 55mBritish Airways

Thu 5/291:00 pmSKG - ONT

2 stops20h 43mBritish Airways

Deal found 4/29

$2,729

One-way flights from Ontario to Greece
Search for one-way flight options from Ontario to Greece. Find affordable one-way fares based on user searches. Data last updated May 1, 2025.

Sun 8/39:41 pmONT - ATH

3 stops58h 59mMultiple Airlines

Deal found 4/29

$469

Sun 8/37:00 amONT - ATH

1 stop17h 30mUnited Airlines

Deal found 4/30

$494

Sun 8/36:15 amONT - ATH

2 stops19h 50mAmerican Airlines

Deal found 4/29

$509

Mon 6/3010:05 pmONT - ATH

1 stop26h 50mDelta

Deal found 4/30

$534

Thu 7/242:39 pmONT - ATH

2 stops34h 56mIberia

Deal found 4/30

$557

Tue 7/297:05 amONT - ATH

1 stop17h 50mKLM

Deal found 4/30

$559

Wed 7/302:34 pmONT - ATH

2 stops24h 16mBritish Airways

Deal found 4/30

$571

Sat 5/1012:41 pmONT - SKG

2 stops21h 14mMultiple Airlines

Deal found 4/30

$576

Thu 7/245:05 amONT - ATH

3 stops21h 45mAir Canada

Deal found 4/30

$759

Tue 7/2911:45 pmONT - ATH

2 stops41h 40mAir Serbia

Deal found 4/30

$853

Thu 9/117:00 amONT - ATH

1 stop17h 00mVirgin Atlantic

Deal found 4/30

$964

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Greece that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 7/13

12:46 pm-12:45 am

2 stops25h 59m

Athens Eleftherios V.

Tue 8/19

6:55 am-5:52 pm

2 stops20h 57m

$760

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 5/13

2:44 pm-1:10 am

2 stops24h 26m

Athens Eleftherios V.

Tue 5/20

6:55 am-11:43 pm

2 stops26h 48m

$785

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 5/13

5:05 am-10:30 am

2 stops19h 25m

Athens Eleftherios V.

Tue 5/20

10:25 am-10:00 pm

2 stops21h 35m

$808

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 5/3

7:00 am-10:55 am

1 stop17h 55m

Athens Eleftherios V.

Mon 5/12

10:30 am-10:29 pm

1 stop21h 59m

$867

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 5/15

7:05 am-10:00 am

1 stop16h 55m

Athens Eleftherios V.

Fri 5/23

3:25 am-4:17 pm

2 stops22h 52m

$893

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 5/16

7:05 am-10:55 am

1 stop17h 50m

Athens Eleftherios V.

Tue 5/20

12:10 pm-10:29 pm

1 stop20h 19m

$969

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 5/4

10:40 pm-3:40 pm

2 stops31h 00m

Athens Eleftherios V.

Sun 5/11

3:40 pm-9:11 pm

2 stops39h 31m

$1,230

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 6/15

5:10 am-1:00 pm

3 stops21h 50m

Athens Eleftherios V.

Fri 6/27

2:25 pm-12:32 pm

3 stops32h 07m

$1,264

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 5/19

11:59 pm-9:15 am

2 stops23h 16m

Athens Eleftherios V.

Sat 5/24

8:35 pm-6:23 pm

2 stops31h 48m

$1,343

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 7/4

11:59 pm-8:30 pm

2 stops34h 31m

Athens Eleftherios V.

Thu 7/10

3:55 am-10:30 pm

2 stops28h 35m

$1,400

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 23 results

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 $1,309). 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?

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

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

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

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

7,934 reviews

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

7,934 reviews

Delta

8.0

Very good

7,934 reviews

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

1,334 reviews

Delta

8.0

Very good

7,934 reviews

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

1,446 reviews

Delta

8.0

Very good

7,934 reviews

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

8,696 reviews

Delta

8.0

Very good

7,934 reviews

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

643 reviews

Delta

8.0

Very good

7,934 reviews

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

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?
$494 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 American Airlines and Delta, with prices starting from $509 and $534, 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 $1,309). 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

Top 4 airlines flying from Ontario to Greece

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$550	Average$1,085	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$552	Average$824	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$584	Average$812	FlexibilityNo cancel fee	On-timeN/A
KLM	Cheapest$602	Average$1,516	FlexibilityNo cancel fee	On-time75%

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$469+ 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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Greece with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 May 1, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to Greece

Cheapest flights from Ontario to GreeceExplore 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 May 1, 2025.

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 May 1, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Greece that are best for you.

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.

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?

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 May 1, 2025.

Rainfall in Greece by month

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

Temperature in Greece by month

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

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 May 1, 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.

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?

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

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

How can I find direct flights from Ontario to Greece?

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

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

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.

Top 4 airlines flying from Ontario to Greece

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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 May 1, 2025.