Greece

$386+ Cheap flights from Ontario (ONT) to Greece

ONT — ATH
Dec 10 — Dec 171
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

Cheapest flights from Ontario to Greece

Fri 11/276:45 am -
2 stops28h 15m
Fri 12/1110:10 am -
2 stops24h 10m
Deal found 11/5$914
Tue 12/86:00 am -
3 stops23h 10m
Tue 12/156:40 am -
2 stops25h 37m
Deal found 11/8$928
Tue 12/84:17 pm -
2 stops19h 03m
Tue 12/156:40 am -
2 stops20h 56m
Deal found 11/8$949
Thu 11/266:08 pm -
3 stops28h 32m
Thu 12/1010:10 am -
3 stops31h 34m
Deal found 11/5$955
Tue 12/16:00 am -
3 stops29h 00m
Tue 12/1510:10 am -
2 stops23h 13m
Deal found 11/9$1,009
Tue 12/88:44 am -
3 stops23h 51m
Tue 12/226:00 am -
3 stops25h 53m
Deal found 11/6$1,026
Sat 12/55:45 am -
2 stops19h 15m
Sat 12/126:45 am -
2 stops20h 51m
Deal found 11/5$1,037
Sat 12/58:44 am -
3 stops23h 51m
Sat 12/126:00 am -
2 stops27h 23m
Deal found 11/5$1,049
Wed 11/256:00 am -
2 stops19h 00m
Tue 12/86:45 am -
2 stops24h 26m
Deal found 11/5$1,092
Tue 11/176:00 am -
2 stops18h 05m
Thu 12/106:45 am -
2 stops20h 51m
Deal found 11/9$1,094

Find flight deals from Ontario to Greece

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$841
(KLM)

One-way from

$386
(Booking.com)

Popular in

June

Cheapest in

February

Average price

$845
Provider with most accurate pricing for Los Angeles-Athens Eleftherios V. flight deals.
Provider most trusted by Cheapflights users for Los Angeles-Athens Eleftherios V. flights.
From Ontario to Greece
One-way flight from Ontario to Greece
Highest demand for flights based on searches. 19% potential increase in price ($220 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Average for round-trip flights in November 2026

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

Cheapest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sat 3/20

1:33 pm-10:00 am

2 stops35h 27m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$403

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sat 3/13

1:33 pm-10:00 am

2 stops34h 27m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$403

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Fri 3/19

12:49 pm-10:00 pm

2 stops24h 11m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$504

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Thu 3/18

1:33 pm-10:00 am

2 stops35h 27m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$531
Quickest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 12/9

4:51 pm-1:00 am

2 stops22h 09m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$608

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 12/8

1:02 pm-1:25 am

2 stops26h 23m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$608

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 11/25

10:37 am-1:00 am

2 stops28h 23m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$608

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 12/8

5:55 pm-9:35 am

2 stops29h 40m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$633

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 11/16

6:37 pm-10:05 am

2 stops29h 28m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$633

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 3/9

12:00 pm-4:30 pm

2 stops18h 30m

Athens Eleftherios V.

Tue 3/16

6:10 am-5:17 pm

2 stops20h 07m

$851

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/8

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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

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

  • 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 30m. KLM provides one of the quickest options available for as low as $851. 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

Browse thousands of different options on Cheapflights for your next trip

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.