Greece

$376+ Cheap flights from Ontario (ONT) to Greece

ONT — ATH
Nov 29 — Dec 61
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

Wed 12/96:00 am -
2 stops19h 00m
Fri 1/227:05 am -
2 stops23h 20m
Deal found 10/28$937
Tue 11/1010:35 am -
3 stops22h 05m
Wed 11/187:30 pm -
2 stops34h 00m
Deal found 10/29$960
Thu 12/105:00 am -
2 stops20h 55m
Thu 12/171:00 pm -
3 stops42h 00m
Deal found 10/26$968
Wed 12/96:00 am -
2 stops19h 00m
Mon 12/141:00 pm -
2 stops42h 11m
Deal found 10/28$970
Fri 12/46:00 am -
2 stops26h 25m
Fri 12/117:05 am -
3 stops27h 15m
Deal found 10/27$975
Thu 11/267:00 am -
2 stops23h 20m
Thu 12/107:55 am -
2 stops23h 58m
Deal found 10/27$979
Thu 11/267:00 am -
2 stops18h 00m
Thu 12/36:45 am -
2 stops23h 53m
Deal found 10/27$987
Thu 12/106:40 pm -
2 stops20h 50m
Thu 12/171:00 pm -
2 stops42h 00m
Deal found 10/26$988
Mon 11/304:17 pm -
2 stops19h 03m
Mon 12/146:45 am -
2 stops24h 26m
Deal found 10/29$996
Wed 11/256:00 am -
2 stops19h 00m
Wed 12/27:05 am -
2 stops23h 33m
Deal found 10/25$1,002
Mon 12/141:40 pm -
2 stops59h 20m
Mon 12/211:00 pm -
2 stops43h 31m
Deal found 10/29$1,006
Thu 11/268:15 am -
3 stops26h 45m
Thu 12/310:10 am -
2 stops22h 48m
Deal found 10/27$1,017

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

$376
(Expedia)

Popular in

June

Cheapest in

February

Average price

$803
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. 20% potential increase in price ($224 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 October 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

Tue 3/30

1:00 pm-1:10 am

2 stops26h 10m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$395

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 3/30

7:00 am-11:00 am

1 stop18h 00m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$424

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 11/25

6:45 am-9:00 pm

3 stops28h 15m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$463

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sat 3/27

1:33 pm-7:10 am

2 stops32h 37m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$472

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 11/24

6:00 am-7:00 pm

3 stops27h 00m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$546

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 3/16

8:02 am-9:20 pm

3 stops28h 18m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$586

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Thu 4/1

7:00 am-11:00 am

1 stop18h 00m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$598

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 11/15

4:25 pm-1:25 am

2 stops23h 00m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$607

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 1/27

1:24 pm-1:00 am

2 stops25h 36m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$609
Quickest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 11/16

6:00 am-9:35 am

2 stops17h 35m

Athens Eleftherios V.

Wed 12/31

12:00 am-2:00 pm

Nonstop0h 00m

$630

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

Showing 1-10 of 23 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 42h. United Airlines provides one of the quickest options available for as low as $847. The distance from Ontario to Greece is about 6879 mi.

  • 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.