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

Air Canada, United Airlines, and British Airways 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 43% of people opting to fly with this airline when traveling to Athens. Keep in mind that there are 19 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 October 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.

$408 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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Cheap round-trip flights

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1:53 pm - 1:40 amONT-ATH

25h 47m2 stops

6:25 am - 8:58 pmATH-ONT

24h 33m2 stops

$508United Airlines

Find Deal

Tue, Jan 27 - Tue, Feb 3

6:45 am - 1:35 pmONT-ATH

20h 50m2 stops

1:45 pm - 4:19 pmATH-ONT

36h 34m2 stops

$509Delta

Find Deal

Tue, Feb 10 - Mon, Feb 23

7:30 am - 1:35 pmONT-ATH

44h 05m2 stops

6:05 am - 10:29 pmATH-ONT

26h 24m2 stops

$510Delta

Find Deal

Sun, Jan 25 - Fri, Feb 6

1:53 pm - 1:40 amONT-ATH

25h 47m2 stops

12:50 pm - 10:53 pmATH-ONT

20h 03m2 stops

$512United Airlines

Find Deal

Tue, Jan 27 - Wed, Feb 4

7:30 am - 4:30 pmONT-ATH

23h 00m2 stops

6:05 am - 10:29 pmATH-ONT

26h 24m2 stops

$515Delta

Find Deal

Mon, Jan 26 - Tue, Feb 3

3:30 pm - 1:35 pmONT-ATH

60h 05m2 stops

6:05 am - 10:29 pmATH-ONT

26h 24m2 stops

$516Delta

Find Deal

Sat, Jan 24 - Fri, Feb 6

6:00 am - 1:35 pmONT-ATH

21h 35m2 stops

6:05 am - 5:09 pmATH-ONT

21h 04m2 stops

$559Multiple Airlines

Find Deal

Tue, Nov 18 - Mon, Nov 24

4:49 pm - 11:10 pmONT-ATH

20h 21m2 stops

7:55 am - 9:57 pmATH-ONT

24h 02m2 stops

$560British Airways

Find Deal

Mon, Feb 9 - Sat, Feb 21

6:00 am - 1:35 pmONT-ATH

21h 35m2 stops

3:25 am - 4:09 pmATH-ONT

22h 44m2 stops

$634Air France

Find Deal

Tue, Nov 18 - Sun, Nov 23

7:05 am - 1:00 pmONT-ATH

19h 55m2 stops

3:25 am - 4:09 pmATH-ONT

22h 44m2 stops

$640Multiple Airlines

Find Deal

Mon, Nov 17 - Sun, Nov 23

United Airlines flights from Ontario to Athens

Our best United Airlines deals on Ontario to Athens flight tickets

United Airlines

Jan 27

ONT1:53 pmOntario

25h 47m

2 stops

ATH1:40 amAthens Eleftherios V.

Feb 3

ATH6:25 amAthens Eleftherios V.

24h 33m

2 stops

ONT8:58 pmOntario

$508

Find similar

United Airlines

Jan 27

ONT1:53 pmOntario

25h 47m

2 stops

ATH1:40 amAthens Eleftherios V.

Feb 4

ATH12:50 pmAthens Eleftherios V.

20h 03m

2 stops

ONT10:53 pmOntario

$512

Find similar

United Airlines

Dec 8

ONT5:05 amOntario

34h 35m

2 stops

ATH1:40 amAthens Eleftherios V.

Jan 12

ATH12:50 pmAthens Eleftherios V.

44h 03m

2 stops

ONT10:53 pmOntario

$519

Find similar

Delta flights from Ontario to Athens

Our best Delta deals on Ontario to Athens flight tickets

Delta

Feb 10

ONT6:45 amOntario

20h 50m

2 stops

ATH1:35 pmAthens Eleftherios V.

Feb 23

ATH1:45 pmAthens Eleftherios V.

36h 34m

2 stops

ONT4:19 pmOntario

$509

Find similar

Delta

Jan 25

ONT7:30 amOntario

44h 05m

2 stops

ATH1:35 pmAthens Eleftherios V.

Feb 6

ATH6:05 amAthens Eleftherios V.

26h 24m

2 stops

ONT10:29 pmOntario

$510

Find similar

Delta

Jan 26

ONT7:30 amOntario

23h 00m

2 stops

ATH4:30 pmAthens Eleftherios V.

Feb 3

ATH6:05 amAthens Eleftherios V.

26h 24m

2 stops

ONT10:29 pmOntario

$515

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 1/27

1:53 pm-1:40 am

2 stops25h 47m

Athens Eleftherios V.

Tue 2/3

6:25 am-8:58 pm

2 stops24h 33m

$508

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 2/10

6:45 am-1:35 pm

2 stops20h 50m

Athens Eleftherios V.

Mon 2/23

1:45 pm-4:19 pm

2 stops36h 34m

$509

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 1/25

7:30 am-1:35 pm

2 stops44h 05m

Athens Eleftherios V.

Fri 2/6

6:05 am-10:29 pm

2 stops26h 24m

$510

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 1/27

1:53 pm-1:40 am

2 stops25h 47m

Athens Eleftherios V.

Wed 2/4

12:50 pm-10:53 pm

2 stops20h 03m

$512

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 1/26

7:30 am-4:30 pm

2 stops23h 00m

Athens Eleftherios V.

Tue 2/3

6:05 am-10:29 pm

2 stops26h 24m

$515

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 1/24

3:30 pm-1:35 pm

2 stops60h 05m

Athens Eleftherios V.

Fri 2/6

6:05 am-10:29 pm

2 stops26h 24m

$516

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 11/18

6:00 am-1:35 pm

2 stops21h 35m

Athens Eleftherios V.

Mon 11/24

6:05 am-5:09 pm

2 stops21h 04m

$559

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 2/9

4:49 pm-11:10 pm

2 stops20h 21m

Athens Eleftherios V.

Sat 2/21

7:55 am-9:57 pm

2 stops24h 02m

$560

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 11/18

6:00 am-1:35 pm

2 stops21h 35m

Athens Eleftherios V.

Sun 11/23

3:25 am-4:09 pm

2 stops22h 44m

$634

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 11/17

7:05 am-1:00 pm

2 stops19h 55m

Athens Eleftherios V.

Sun 11/23

3:25 am-4:09 pm

2 stops22h 44m

$640

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 9% 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

Direct flights	None

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 16h 50m.
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 October 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 $635	Free Cancellation	Rating 7.4 8,999 reviews		Search United Airlines flights

Piraeus

Glyfada

Marathon

Hydra

Aegina

Skala

Loutraki

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.

An easier way to manage your Athens trip

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Cheap flights from Ontario to Athens from $408

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Athens departing on 11/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names and deals

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Find the cheapest flights from Ontario to Athens

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United Airlines flights from Ontario to Athens

Our best United Airlines deals on Ontario to Athens flight tickets

Delta flights from Ontario to Athens

Our best Delta deals on Ontario to Athens flight tickets

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Use the filters below to find and compare flights from Ontario to Athens that are best for you.

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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

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

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

Can stopping save me money on Ontario to Athens flights?

You could potentially save up to 9% on your flight if you consider stops on a Ontario to Athens flight.

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

Air Canada, United Airlines, and British Airways are the most popular carriers operating from Ontario to Athens Eleftherios V.

What airlines fly to Athens?

When to book flights from Ontario to Athens

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

Direct flights

How far is Ontario to Athens Eleftherios V. by plane?

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

How many operators does momondo search 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?

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

What is the most popular airline from Ontario to Athens?

Best airlines flying from Ontario to Athens

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

Traveling to a place near Athens?

Why use momondo?

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

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

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

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

An easier way to manage your Athens trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Greece

Fly your favorite airline to Athens

Airlines are sorted and displayed according to clicks in the past 7 days on momondo