What is the cheapest airline that flies from Ontario to Athens Eleftherios V.?

British Airways and KLM are the most popular carriers operating from Ontario to Athens Eleftherios V.

What airlines fly to Athens?

Norse Atlantic Airways, United Airlines and Turkish Airlines are the top three most popular airlines that fly to Athens from Ontario according to our data. Norse Atlantic Airways is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Athens. Keep in mind that there are 18 different airlines that fly to Athens on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Ontario Airport to Athens Eleftherios V. Airport?

Prices for flights from Ontario Airport to Athens Eleftherios V. Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Ontario Airport to Athens Eleftherios V. Airport?

As of March 2026, there is 1 operator available to choose from for flights from Ontario Airport to Athens Eleftherios V. Airport.

How old do you have to be to fly from Ontario Airport to Athens Eleftherios V. Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Athens Eleftherios V. Airport.

What documentation or ID do you need to fly to Athens Eleftherios V. Airport?

The required travel and health documents for your Athens Eleftherios V. Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Athens Eleftherios V. Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$267 Cheap Flights from Ontario to Athens in 2026

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Find the cheapest flights from Ontario to Athens

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:20 pm - 1:15 am

ONT

ATH

25h 55m

2 stops

9:45 am - 9:00 pm

ATH

ONT

21h 15m

1 stop

$647Delta

Wed, Apr 1 - Wed, Apr 8

6:00 am - 11:00 pm

ONT

ATH

31h 00m

2 stops

6:00 am - 10:34 pm

ATH

ONT

26h 34m

2 stops

$648Delta

Tue, Mar 31 - Tue, Apr 7

7:30 am - 5:05 pm

ONT

ATH

23h 35m

2 stops

6:55 am - 11:46 pm

ATH

ONT

26h 51m

2 stops

$649American Airlines

Wed, Apr 29 - Wed, May 6

5:09 pm - 1:15 am

ONT

ATH

22h 06m

2 stops

9:45 am - 11:51 pm

ATH

ONT

24h 06m

2 stops

$651Delta

Wed, Apr 1 - Wed, Apr 8

5:05 pm - 1:15 am

ONT

ATH

22h 10m

2 stops

6:00 am - 5:15 pm

ATH

ONT

21h 15m

2 stops

$652KLM

Sun, Apr 19 - Wed, Apr 29

5:05 pm - 1:15 am

ONT

ATH

22h 10m

2 stops

6:00 am - 11:44 pm

ATH

ONT

27h 44m

2 stops

$653Delta

Sun, Apr 19 - Wed, Apr 29

10:25 pm - 9:55 am

ONT

ATH

26h 30m

1 stop

6:00 am - 11:51 pm

ATH

ONT

27h 51m

2 stops

$656Delta

Sun, Mar 8 - Thu, Apr 2

10:25 pm - 9:55 am

ONT

ATH

26h 30m

1 stop

6:00 am - 4:28 pm

ATH

ONT

20h 28m

2 stops

$657Delta

Sun, Mar 8 - Tue, Mar 31

5:05 pm - 1:15 am

ONT

ATH

22h 10m

2 stops

6:00 am - 5:15 pm

ATH

ONT

21h 15m

2 stops

$659Delta

Sun, Apr 19 - Fri, May 1

12:57 pm - 11:00 am

ONT

ATH

36h 03m

1 stop

1:35 pm - 11:44 pm

ATH

ONT

20h 09m

2 stops

$665Multiple Airlines

Mon, Apr 6 - Wed, Apr 22

Delta flights from Ontario to Athens

Our best Delta deals on Ontario to Athens flight tickets

Delta

Apr 1

ONT1:20 pmOntario

25h 55m

2 stops

ATH1:15 amAthens Eleftherios V.

Apr 8

ATH9:45 amAthens Eleftherios V.

21h 15m

1 stop

ONT9:00 pmOntario

$647

Delta

Mar 31

ONT6:00 amOntario

31h 00m

2 stops

ATH11:00 pmAthens Eleftherios V.

Apr 7

ATH6:00 amAthens Eleftherios V.

26h 34m

2 stops

ONT10:34 pmOntario

$648

Delta

Apr 1

ONT5:09 pmOntario

22h 06m

2 stops

ATH1:15 amAthens Eleftherios V.

Apr 8

ATH9:45 amAthens Eleftherios V.

24h 06m

2 stops

ONT11:51 pmOntario

$651

American Airlines flights from Ontario to Athens

Our best American Airlines deals on Ontario to Athens flight tickets

American Airlines

Apr 29

ONT7:30 amOntario

23h 35m

2 stops

ATH5:05 pmAthens Eleftherios V.

May 6

ATH6:55 amAthens Eleftherios V.

26h 51m

2 stops

ONT11:46 pmOntario

$649

American Airlines

Mar 14

ONT6:00 amOntario

24h 55m

2 stops

ATH3:55 pmAthens Eleftherios V.

May 16

ATH7:25 amAthens Eleftherios V.

25h 11m

2 stops

ONT10:36 pmOntario

$779

American Airlines

Mar 14

ONT10:36 pmOntario

41h 44m

2 stops

ATH1:20 amAthens Eleftherios V.

Mar 23

ATH4:45 pmAthens Eleftherios V.

36h 00m

2 stops

ONT7:45 pmOntario

$1,179

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 4/1

1:20 pm-1:15 am

2 stops25h 55m

Athens Eleftherios V.

Wed 4/8

9:45 am-9:00 pm

1 stop21h 15m

$647

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 3/31

6:00 am-11:00 pm

2 stops31h 00m

Athens Eleftherios V.

Tue 4/7

6:00 am-10:34 pm

2 stops26h 34m

$648

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 4/29

7:30 am-5:05 pm

2 stops23h 35m

Athens Eleftherios V.

Wed 5/6

6:55 am-11:46 pm

2 stops26h 51m

$649

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 4/1

5:09 pm-1:15 am

2 stops22h 06m

Athens Eleftherios V.

Wed 4/8

9:45 am-11:51 pm

2 stops24h 06m

$651

Quickest round-trip

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 4/19

5:05 pm-1:15 am

2 stops22h 10m

Athens Eleftherios V.

Wed 4/29

6:00 am-5:15 pm

2 stops21h 15m

$652

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 4/19

5:05 pm-1:15 am

2 stops22h 10m

Athens Eleftherios V.

Wed 4/29

6:00 am-11:44 pm

2 stops27h 44m

$653

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 3/8

10:25 pm-9:55 am

1 stop26h 30m

Athens Eleftherios V.

Thu 4/2

6:00 am-11:51 pm

2 stops27h 51m

$656

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 3/8

10:25 pm-9:55 am

1 stop26h 30m

Athens Eleftherios V.

Tue 3/31

6:00 am-4:28 pm

2 stops20h 28m

$657

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 4/19

5:05 pm-1:15 am

2 stops22h 10m

Athens Eleftherios V.

Fri 5/1

6:00 am-5:15 pm

2 stops21h 15m

$659

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 4/6

12:57 pm-11:00 am

1 stop36h 03m

Athens Eleftherios V.

Wed 4/22

1:35 pm-11:44 pm

2 stops20h 09m

$665

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Athens

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to Athens?

The cheapest day to depart on your flight to Athens is on a Saturday when prices can be found for as low as $697. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around $748. These prices are subject to change though, so be sure to set up a Price Alert for flights to Athens.

What is the cheapest time of day to depart on your flight to Athens?

The cheapest time of day to fly to Athens is in the evening when flights can be purchased for as low as $718. Flights to Athens are more costly at noon, with an average ticket price of $838. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Ontario to Athens flights?

You could potentially save up to 52% on your flight if you consider stops on a Ontario to Athens flight.

When to book flights from Ontario to Athens

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Athens according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Ontario to Athens (ONT to ATH) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Athens

Fastest flight time	17h 00m
Direct flights	None

The fastest flight from Ontario to Athens takes 17h 00m

There are no direct flights from Ontario to Athens. There are no popular flight routes from Ontario to Athens.

Search flight deals

How far is Ontario to Athens Eleftherios V. by plane?
The distance between Ontario and Athens Eleftherios V. is about 6871.5 mi. A reasonable flight in good conditions will take 17h 00m.
When did momondo last update prices for flights from Ontario Airport to Athens Eleftherios V. Airport?
Prices for flights from Ontario Airport to Athens Eleftherios V. Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Ontario Airport to Athens Eleftherios V. Airport?
As of March 2026, there is 1 operator available to choose from for flights from Ontario Airport to Athens Eleftherios V. Airport.
How old do you have to be to fly from Ontario Airport to Athens Eleftherios V. Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Athens Eleftherios V. Airport.
What documentation or ID do you need to fly to Athens Eleftherios V. Airport?
The required travel and health documents for your Athens Eleftherios V. Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Athens Eleftherios V. Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Ontario to Athens?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Ontario to Athens is United Airlines (100% of total bookings).

Best airlines flying from Ontario to Athens

Compare and see reviews for airlines that fly from Ontario to Athens with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $603	Free Cancellation	Rating 7.4 9,389 reviews		Search United Airlines flights

Piraeus

Glyfada

Marathon

Hydra

Skala

Loutraki

Aegina

Tolo

Corinth

Agia Marina

Chalcis

Porto Cheli

Galaxidi

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Athens?

It is quick and easy to find Ontario to Athens flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Athens that suits you.

Can I find flights from Ontario to Athens with flexible booking policies on momondo?

Flights from Ontario to Athens with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to Athens?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Athens from Ontario.

I’m not ready to book a flight from Ontario to Athens right now. Can momondo alert me if prices change?

Price alerts on flights to Athens from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.