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

British Airways and United Airlines 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.

$256 Cheap Flights from Ontario to Athens in 2025/26

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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.

6:00 am - 1:40 am

ONT

ATH

33h 40m2 stops

12:15 pm - 10:25 pm

ATH

ONT

43h 10m2 stops

$481United Airlines

Sat, Mar 7 - Sat, Mar 14

5:06 pm - 12:30 pm

ONT

ATH

33h 24m2 stops

7:45 am - 10:49 pm

ATH

ONT

25h 04m2 stops

$491British Airways

Mon, Feb 16 - Mon, Feb 23

1:53 pm - 1:40 am

ONT

ATH

25h 47m2 stops

2:15 pm - 10:53 pm

ATH

ONT

18h 38m2 stops

$493Lufthansa

Sat, Jan 24 - Mon, Feb 9

1:53 pm - 4:35 pm

ONT

ATH

40h 42m2 stops

6:35 am - 12:47 pm

ATH

ONT

40h 12m2 stops

$515United Airlines

Thu, Jan 29 - Mon, Feb 2

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

1:20 pm - 1:15 am

ONT

ATH

26h 55m2 stops

9:10 am - 9:04 pm

ATH

ONT

21h 54m1 stop

$563KLM

Sat, Mar 21 - Fri, Apr 3

10:25 pm - 11:00 am

ONT

ATH

26h 35m1 stop

9:10 am - 8:58 pm

ATH

ONT

21h 48m1 stop

$586Delta

Sun, Mar 29 - Wed, Apr 29

5:02 pm - 12:15 pm

ONT

ATH

34h 13m2 stops

7:30 am - 9:56 pm

ATH

ONT

24h 26m2 stops

$588British Airways

Wed, Mar 25 - Wed, Apr 8

7:30 am - 10:55 pm

ONT

ATH

29h 25m2 stops

9:10 am - 10:09 pm

ATH

ONT

22h 59m1 stop

$590Delta

Tue, Apr 28 - Tue, May 12

5:06 pm - 1:25 am

ONT

ATH

22h 19m2 stops

8:05 pm - 10:04 pm

ATH

ONT

35h 59m2 stops

$591British Airways

Sat, Feb 14 - Sat, Feb 28

United Airlines flights from Ontario to Athens

Our best United Airlines deals on Ontario to Athens flight tickets

United Airlines

Mar 7

ONT6:00 amOntario

33h 40m

2 stops

ATH1:40 amAthens Eleftherios V.

Mar 14

ATH12:15 pmAthens Eleftherios V.

43h 10m

2 stops

ONT10:25 pmOntario

$481

Find similar

United Airlines

Jan 29

ONT1:53 pmOntario

40h 42m

2 stops

ATH4:35 pmAthens Eleftherios V.

Feb 2

ATH6:35 amAthens Eleftherios V.

40h 12m

2 stops

ONT12:47 pmOntario

$515

Find similar

United Airlines

Jan 29

ONT6:00 amOntario

24h 15m

2 stops

ATH4:15 pmAthens Eleftherios V.

Feb 2

ATH6:35 amAthens Eleftherios V.

40h 12m

2 stops

ONT12:47 pmOntario

$516

Find similar

British Airways flights from Ontario to Athens

Our best British Airways deals on Ontario to Athens flight tickets

British Airways

Feb 16

ONT5:06 pmOntario

33h 24m

2 stops

ATH12:30 pmAthens Eleftherios V.

Feb 23

ATH7:45 amAthens Eleftherios V.

25h 04m

2 stops

ONT10:49 pmOntario

$491

Find similar

British Airways

Mar 25

ONT5:02 pmOntario

34h 13m

2 stops

ATH12:15 pmAthens Eleftherios V.

Apr 8

ATH7:30 amAthens Eleftherios V.

24h 26m

2 stops

ONT9:56 pmOntario

$588

Find similar

British Airways

Feb 14

ONT5:06 pmOntario

22h 19m

2 stops

ATH1:25 amAthens Eleftherios V.

Feb 28

ATH8:05 pmAthens Eleftherios V.

35h 59m

2 stops

ONT10:04 pmOntario

$591

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 3/7

6:00 am-1:40 am

2 stops33h 40m

Athens Eleftherios V.

Sat 3/14

12:15 pm-10:25 pm

2 stops43h 10m

$481

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 2/16

5:06 pm-12:30 pm

2 stops33h 24m

Athens Eleftherios V.

Mon 2/23

7:45 am-10:49 pm

2 stops25h 04m

$491

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 1/24

1:53 pm-1:40 am

2 stops25h 47m

Athens Eleftherios V.

Mon 2/9

2:15 pm-10:53 pm

2 stops18h 38m

$493

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 1/29

1:53 pm-4:35 pm

2 stops40h 42m

Athens Eleftherios V.

Mon 2/2

6:35 am-12:47 pm

2 stops40h 12m

$515

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 3/21

1:20 pm-1:15 am

2 stops26h 55m

Athens Eleftherios V.

Fri 4/3

9:10 am-9:04 pm

1 stop21h 54m

$563

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 3/29

10:25 pm-11:00 am

1 stop26h 35m

Athens Eleftherios V.

Wed 4/29

9:10 am-8:58 pm

1 stop21h 48m

$586

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 3/25

5:02 pm-12:15 pm

2 stops34h 13m

Athens Eleftherios V.

Wed 4/8

7:30 am-9:56 pm

2 stops24h 26m

$588

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 4/28

7:30 am-10:55 pm

2 stops29h 25m

Athens Eleftherios V.

Tue 5/12

9:10 am-10:09 pm

1 stop22h 59m

$590

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 2/14

5:06 pm-1:25 am

2 stops22h 19m

Athens Eleftherios V.

Sat 2/28

8:05 pm-10:04 pm

2 stops35h 59m

$591

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	19h 11m
Direct flights	None

The fastest flight from Ontario to Athens takes 19h 11m

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 19h 11m.
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 9,115 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.