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

Delta, KLM, and British Airways 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 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 February 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.

$257 Cheap Flights from Ontario to Athens in 2026

Q: What is the typical price of a round-trip flight between Ontario and Athens?

Prices are currently typical for flights on this route. Typical prices usually range from $578 to $606. The lowest price recently found on this route was $595.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

7:00 am - 10:35 am

ONT

ATH

17h 35m

1 stop

12:35 pm - 10:26 pm

ATH

ONT

19h 51m

1 stop

$595United Airlines

Mon, Aug 10 - Thu, Sep 10

3:19 pm - 1:20 am

ONT

ATH

25h 01m

2 stops

8:00 pm - 10:19 pm

ATH

ONT

36h 19m

2 stops

$609British Airways

Tue, Mar 17 - Tue, Mar 31

5:02 pm - 2:10 am

ONT

ATH

23h 08m

2 stops

7:30 am - 10:36 pm

ATH

ONT

25h 06m

2 stops

$619British Airways

Mon, Mar 30 - Wed, Apr 8

6:00 am - 11:00 pm

ONT

ATH

31h 00m

2 stops

9:45 am - 9:00 pm

ATH

ONT

21h 15m

1 stop

$622Delta

Wed, Apr 1 - Wed, Apr 8

4:52 pm - 2:10 am

ONT

ATH

23h 18m

2 stops

8:50 pm - 6:37 pm

ATH

ONT

31h 47m

2 stops

$626British Airways

Tue, May 5 - Mon, May 11

10:56 am - 6:50 pm

ONT

ATH

22h 54m

2 stops

2:00 pm - 4:22 pm

ATH

ONT

36h 22m

2 stops

$631British Airways

Thu, Mar 19 - Thu, Apr 2

10:25 pm - 9:55 am

ONT

ATH

26h 30m

1 stop

9:45 am - 9:00 pm

ATH

ONT

21h 15m

1 stop

$646Delta

Sun, Mar 22 - Tue, Apr 7

10:59 am - 6:05 pm

ONT

ATH

21h 06m

2 stops

6:30 pm - 4:22 pm

ATH

ONT

31h 52m

2 stops

$662British Airways

Tue, Apr 7 - Tue, Apr 21

6:00 am - 10:10 am

ONT

ATH

42h 10m

2 stops

10:25 am - 8:42 pm

ATH

ONT

20h 17m

2 stops

$663United Airlines

Sun, May 17 - Sat, May 23

10:59 am - 2:25 am

ONT

ATH

29h 26m

2 stops

8:50 pm - 4:22 pm

ATH

ONT

29h 32m

2 stops

$669British Airways

Wed, May 13 - Mon, May 18

Delta flights from Ontario to Athens

Our best Delta deals on Ontario to Athens flight tickets

Delta

Apr 1

ONT6:00 amOntario

31h 00m

2 stops

ATH11:00 pmAthens Eleftherios V.

Apr 8

ATH9:45 amAthens Eleftherios V.

21h 15m

1 stop

ONT9:00 pmOntario

$622

Delta

Mar 22

ONT10:25 pmOntario

26h 30m

1 stop

ATH9:55 amAthens Eleftherios V.

Apr 7

ATH9:45 amAthens Eleftherios V.

21h 15m

1 stop

ONT9:00 pmOntario

$646

Delta

May 8

ONT11:52 amOntario

27h 23m

2 stops

ATH1:15 amAthens Eleftherios V.

May 15

ATH9:35 amAthens Eleftherios V.

22h 19m

1 stop

ONT9:54 pmOntario

$694

United Airlines flights from Ontario to Athens

Our best United Airlines deals on Ontario to Athens flight tickets

United Airlines

Feb 18

ONT6:37 pmOntario

37h 28m

2 stops

ATH6:05 pmAthens Eleftherios V.

Feb 25

ATH2:20 pmAthens Eleftherios V.

18h 37m

2 stops

ONT10:57 pmOntario

$623

United Airlines

Feb 18

ONT8:00 amOntario

22h 35m

2 stops

ATH4:35 pmAthens Eleftherios V.

Feb 25

ATH2:20 pmAthens Eleftherios V.

18h 37m

2 stops

ONT10:57 pmOntario

$630

United Airlines

May 17

ONT6:00 amOntario

42h 10m

2 stops

ATH10:10 amAthens Eleftherios V.

May 23

ATH10:25 amAthens Eleftherios V.

20h 17m

2 stops

ONT8:42 pmOntario

$663

Fly from

Fly to

Route

Depart

Return

Price

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 8/10

7:00 am-10:35 am

1 stop17h 35m

Athens Eleftherios V.

Thu 9/10

12:35 pm-10:26 pm

1 stop19h 51m

$595

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 3/17

3:19 pm-1:20 am

2 stops25h 01m

Athens Eleftherios V.

Tue 3/31

8:00 pm-10:19 pm

2 stops36h 19m

$609

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 3/30

5:02 pm-2:10 am

2 stops23h 08m

Athens Eleftherios V.

Wed 4/8

7:30 am-10:36 pm

2 stops25h 06m

$619

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 4/1

6:00 am-11:00 pm

2 stops31h 00m

Athens Eleftherios V.

Wed 4/8

9:45 am-9:00 pm

1 stop21h 15m

$622

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 5/5

4:52 pm-2:10 am

2 stops23h 18m

Athens Eleftherios V.

Mon 5/11

8:50 pm-6:37 pm

2 stops31h 47m

$626

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 3/19

10:56 am-6:50 pm

2 stops22h 54m

Athens Eleftherios V.

Thu 4/2

2:00 pm-4:22 pm

2 stops36h 22m

$631

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 3/22

10:25 pm-9:55 am

1 stop26h 30m

Athens Eleftherios V.

Tue 4/7

9:45 am-9:00 pm

1 stop21h 15m

$646

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 4/7

10:59 am-6:05 pm

2 stops21h 06m

Athens Eleftherios V.

Tue 4/21

6:30 pm-4:22 pm

2 stops31h 52m

$662

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 5/17

6:00 am-10:10 am

2 stops42h 10m

Athens Eleftherios V.

Sat 5/23

10:25 am-8:42 pm

2 stops20h 17m

$663

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 5/13

10:59 am-2:25 am

2 stops29h 26m

Athens Eleftherios V.

Mon 5/18

8:50 pm-4:22 pm

2 stops29h 32m

$669

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 typical price of a round-trip flight between Ontario and Athens?

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 Wednesday because tickets tend to average around $772. 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 $729. 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	18h 25m
Direct flights	None

The fastest flight from Ontario to Athens takes 18h 25m

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 25m.
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 February 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 $660	Free Cancellation	Rating 7.4 9,312 reviews		Search United Airlines flights

Piraeus

Glyfada

Marathon

Hydra

Skala

Aegina

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.