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, Turkish Airlines and United 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 45% 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 December 2025, 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.

$257 Cheap Flights from Ontario to Athens in 2025/26

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Find the cheapest flights from Ontario to Athens

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One-way

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Cheap round-trip flights

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3:09 pm - 1:25 am

ONT

ATH

24h 16m2 stops

8:00 am - 10:48 pm

ATH

ONT

24h 48m2 stops

$490British Airways

Thu, Jan 22 - Sun, Jan 25

10:58 am - 7:15 pm

ONT

ATH

22h 17m2 stops

7:50 pm - 6:45 pm

ATH

ONT

32h 55m2 stops

$496American Airlines

Fri, Jan 16 - Fri, Jan 23

6:00 am - 1:40 am

ONT

ATH

33h 40m2 stops

6:05 am - 5:51 pm

ATH

ONT

45h 46m2 stops

$502United Airlines

Fri, Jan 16 - Fri, Jan 23

6:39 pm - 1:40 am

ONT

ATH

21h 01m2 stops

6:35 am - 10:53 pm

ATH

ONT

26h 18m2 stops

$503United Airlines

Fri, Jan 16 - Sun, Jan 25

6:00 am - 1:15 am

ONT

ATH

33h 15m2 stops

6:05 am - 10:51 pm

ATH

ONT

26h 46m2 stops

$507Delta

Sat, Jan 17 - Sat, Jan 24

6:00 am - 3:50 pm

ONT

ATH

23h 50m2 stops

8:00 am - 10:13 pm

ATH

ONT

24h 13m3 stops

$509American Airlines

Sat, Jan 17 - Sun, Jan 25

6:00 am - 4:15 pm

ONT

ATH

24h 15m2 stops

6:35 am - 12:47 pm

ATH

ONT

40h 12m2 stops

$516United Airlines

Thu, Jan 29 - Mon, Feb 2

1:53 pm - 4:35 pm

ONT

ATH

40h 42m2 stops

11:25 am - 9:36 pm

ATH

ONT

44h 11m2 stops

$524United Airlines

Sat, Feb 28 - Sun, Mar 8

6:39 pm - 4:35 pm

ONT

ATH

35h 56m2 stops

12:50 pm - 8:58 pm

ATH

ONT

42h 08m2 stops

$526United Airlines

Thu, Jan 29 - Mon, Feb 2

5:02 pm - 1:25 am

ONT

ATH

23h 23m2 stops

7:30 am - 11:59 pm

ATH

ONT

26h 29m2 stops

$530British Airways

Thu, Mar 19 - Wed, Apr 1

British Airways flights from Ontario to Athens

Our best British Airways deals on Ontario to Athens flight tickets

British Airways

Mar 19

ONT5:02 pmOntario

23h 23m

2 stops

ATH1:25 amAthens Eleftherios V.

Mar 26

ATH7:30 amAthens Eleftherios V.

23h 37m

2 stops

ONT10:07 pmOntario

$490

Find similar

British Airways

Mar 19

ONT5:02 pmOntario

23h 23m

2 stops

ATH1:25 amAthens Eleftherios V.

Apr 1

ATH7:30 amAthens Eleftherios V.

26h 29m

2 stops

ONT11:59 pmOntario

$530

Find similar

British Airways

Mar 21

ONT5:02 pmOntario

23h 23m

2 stops

ATH1:25 amAthens Eleftherios V.

Apr 3

ATH7:30 amAthens Eleftherios V.

25h 00m

2 stops

ONT10:30 pmOntario

$539

Find similar

American Airlines flights from Ontario to Athens

Our best American Airlines deals on Ontario to Athens flight tickets

American Airlines

Jan 16

ONT10:58 amOntario

22h 17m

2 stops

ATH7:15 pmAthens Eleftherios V.

Jan 23

ATH7:50 pmAthens Eleftherios V.

32h 55m

2 stops

ONT6:45 pmOntario

$496

Find similar

American Airlines

Jan 17

ONT6:00 amOntario

23h 50m

2 stops

ATH3:50 pmAthens Eleftherios V.

Jan 25

ATH8:00 amAthens Eleftherios V.

24h 13m

3 stops

ONT10:13 pmOntario

$509

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 1/22

3:09 pm-1:25 am

2 stops24h 16m

Athens Eleftherios V.

Sun 1/25

8:00 am-10:48 pm

2 stops24h 48m

$490

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 1/16

10:58 am-7:15 pm

2 stops22h 17m

Athens Eleftherios V.

Fri 1/23

7:50 pm-6:45 pm

2 stops32h 55m

$496

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 1/16

6:00 am-1:40 am

2 stops33h 40m

Athens Eleftherios V.

Fri 1/23

6:05 am-5:51 pm

2 stops45h 46m

$502

OntarioAthens

ONT - ATH

ONTATH

Ontario

Fri 1/16

6:39 pm-1:40 am

2 stops21h 01m

Athens Eleftherios V.

Sun 1/25

6:35 am-10:53 pm

2 stops26h 18m

$503

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 1/17

6:00 am-1:15 am

2 stops33h 15m

Athens Eleftherios V.

Sat 1/24

6:05 am-10:51 pm

2 stops26h 46m

$507

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 1/17

6:00 am-3:50 pm

2 stops23h 50m

Athens Eleftherios V.

Sun 1/25

8:00 am-10:13 pm

3 stops24h 13m

$509

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 1/29

6:00 am-4:15 pm

2 stops24h 15m

Athens Eleftherios V.

Mon 2/2

6:35 am-12:47 pm

2 stops40h 12m

$516

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 2/28

1:53 pm-4:35 pm

2 stops40h 42m

Athens Eleftherios V.

Sun 3/8

11:25 am-9:36 pm

2 stops44h 11m

$524

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 1/29

6:39 pm-4:35 pm

2 stops35h 56m

Athens Eleftherios V.

Mon 2/2

12:50 pm-8:58 pm

2 stops42h 08m

$526

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 3/19

5:02 pm-1:25 am

2 stops23h 23m

Athens Eleftherios V.

Wed 4/1

7:30 am-11:59 pm

2 stops26h 29m

$530

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 Monday when prices can be found for as low as $646. 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 Sunday because tickets tend to average around $747. 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 $710. Flights to Athens are more costly in the morning, with an average ticket price of $1,002. Departure times in the morning 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 6% 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	18h 21m
Direct flights	None

The fastest flight from Ontario to Athens takes 18h 21m

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 18h 21m.
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 December 2025, 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 $660	Free Cancellation	Rating 7.4 9,099 reviews		Search United Airlines flights

Piraeus

Glyfada

Marathon

Hydra

Aegina

Skala

Loutraki

Tolo

Corinth

Chalcis

Agia Marina

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.