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Greece

$323+ 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 8/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Sep 3 — Sep 101
Thu 9/3
Thu 9/10
1 adult, Economy
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Cheap 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 August 4, 2026.

This Air Canada deal was found by Cheapflights users on 8/1. 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.
Sun 8/305:00 am
ONT
-
ATH
2 stops22h 25m
Air Canada
Fri 10/1612:10 pm
ATH
-
ONT
2 stops42h 48m
Air Canada
Deal found 8/1$769
This United Airlines deal was found by Cheapflights users on 8/1. 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 8/317:00 am
ONT
-
ATH
2 stops30h 05m
United Airlines
Fri 10/1612:10 pm
ATH
-
ONT
2 stops44h 39m
United Airlines
Deal found 8/1$773
This Air Canada deal was found by Cheapflights users on 8/1. 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 8/295:00 am
ONT
-
ATH
2 stops44h 10m
Air Canada
Fri 10/1612:10 pm
ATH
-
ONT
2 stops42h 48m
Air Canada
Deal found 8/1$774
This Delta deal was found by Cheapflights users on 8/1. 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.
Sun 8/307:05 am
ONT
-
ATH
1 stop17h 55m
Delta
Wed 10/141:35 pm
ATH
-
ONT
2 stops43h 08m
Delta
Deal found 8/1$786
This Delta deal was found by Cheapflights users on 8/1. 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.
Sun 8/3011:56 am
ONT
-
ATH
2 stops25h 04m
Delta
Thu 10/156:00 am
ATH
-
ONT
2 stops21h 12m
Delta
Deal found 8/1$790
This Delta deal was found by Cheapflights users on 8/1. 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 8/2912:00 pm
ONT
-
ATH
1 stop37h 00m
Delta
Tue 10/131:35 pm
ATH
-
ONT
2 stops43h 08m
Delta
Deal found 8/1$791
This United Airlines deal was found by Cheapflights users on 8/1. 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 8/317:00 am
ONT
-
ATH
2 stops30h 05m
United Airlines
Thu 10/156:35 am
ATH
-
ONT
2 stops23h 56m
United Airlines
Deal found 8/1$792
This Delta deal was found by Cheapflights users on 8/1. 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 8/293:35 pm
ONT
-
ATH
2 stops45h 25m
Delta
Wed 10/141:35 pm
ATH
-
ONT
2 stops43h 08m
Delta
Deal found 8/1$795
This Delta deal was found by Cheapflights users on 8/1. 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 8/2912:00 pm
ONT
-
ATH
1 stop37h 00m
Delta
Mon 10/121:35 pm
ATH
-
ONT
2 stops55h 41m
Delta
Deal found 8/1$797
This United Airlines deal was found by Cheapflights users on 8/2. 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 12/306:45 am
ONT
-
ATH
2 stops20h 10m
United Airlines
Thu 1/71:00 pm
ATH
-
ONT
2 stops39h 44m
United Airlines
Deal found 8/2$808
This United Airlines deal was found by Cheapflights users on 8/1. 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 8/317:00 am
ONT
-
ATH
2 stops30h 05m
United Airlines
Mon 10/122:15 pm
ATH
-
ONT
2 stops37h 26m
United Airlines
Deal found 8/1$812
This British Airways deal was found by Cheapflights users on 8/3. 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.
Mon 8/3112:59 pm
ONT
-
SKG
2 stops22h 16m
British Airways
Sun 11/19:25 pm
SKG
-
ONT
2 stops31h 22m
British Airways
Deal found 8/3$1,026

Find flight deals from Ontario to Greece

Keep the following information in mind while searching for Ontario to Greece flight deals. Data was last updated August 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$769
(Air Canada)

One-way from

$323
(oojo)

Popular in

June

Cheapest in

February

Average price

$796
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. 26% potential increase in price ($292 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

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 August 4, 2026.
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

Cheapest round-trip

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 10/29

9:45 am-1:40 pm

2 stops42h 55m

Athens Eleftherios V.

Mon 11/2

2:40 pm-10:11 pm

2 stops41h 31m

$1,037

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Sun 9/13

10:39 pm-8:25 pm

2 stops35h 46m

Thessaloniki Makedonia

Mon 9/28

9:15 pm-8:57 pm

2 stops33h 42m

$1,086

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 8/31

7:05 am-11:45 am

1 stop18h 40m

Athens Eleftherios V.

Wed 10/14

1:00 pm-10:59 pm

1 stop19h 59m

$1,091

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 12/25

12:00 pm-4:30 pm

2 stops18h 30m

Athens Eleftherios V.

Sun 1/10

5:55 am-4:12 pm

2 stops20h 17m

$1,253

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 12/25

6:45 am-11:00 am

2 stops42h 15m

Athens Eleftherios V.

Fri 1/1

1:00 pm-6:44 pm

2 stops39h 44m

$1,267

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 9/16

10:39 pm-2:35 pm

2 stops29h 56m

Athens Eleftherios V.

Fri 9/25

4:00 am-8:57 pm

2 stops26h 57m

$1,281
Quickest round-trip

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 8/31

7:05 am-10:00 am

1 stop16h 55m

Athens Eleftherios V.

Tue 9/15

9:45 am-8:24 pm

1 stop20h 39m

$1,304

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 12/24

5:00 am-9:20 pm

2 stops30h 20m

Athens Eleftherios V.

Mon 1/4

6:45 am-12:33 pm

2 stops39h 48m

$1,318

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Fri 9/18

10:39 pm-8:25 pm

2 stops35h 46m

Thessaloniki Makedonia

Sun 9/27

9:35 am-8:57 pm

2 stops45h 22m

$1,346

OntarioThessaloniki

ONT - SKG

ONTSKG

Ontario

Sun 9/6

11:59 pm-8:25 pm

2 stops34h 26m

Thessaloniki Makedonia

Sun 9/20

9:15 pm-8:57 pm

2 stops57h 42m

$1,362

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 42 resultsSorted by cheapest first
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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

No data available for this route at this time. Please check back soon.

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.

  • How long is the flight from Ontario to Greece?

    A quick flight from Ontario to Greece can take about 18h 40m. Delta provides one of the quickest options available for as low as $1,091. The distance from Ontario to Greece is about 6879 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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.

See more FAQs

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