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

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

What airlines fly to Athens?

United Airlines, Turkish Airlines and British Airways are the top three most popular airlines that fly to Athens from Ontario according to our data. United Airlines is the first choice among our users, with 29% 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 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.

$376 Cheap Flights from Ontario to Athens in 2026/27

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.

6:45 am - 11:55 pmONT Ontario-ATH Athens Eleftherios V.

31h 10m3 stops Denver Intl Reykjavik Keflavik Intl Dublin

9:45 pm - 11:23 pmATH Athens Eleftherios V.-ONT Ontario

35h 38m3 stops Barcelona-El Prat Lisbon Humberto Delgado San Francisco

$844Multiple Airlines

Wed, Nov 25 - Sun, Dec 6

11:27 am - 1:30 amONT Ontario-ATH Athens Eleftherios V.

28h 03m2 stops San Francisco Munich Franz Josef Strauss

6:45 am - 10:30 pmATH Athens Eleftherios V.-ONT Ontario

25h 45m2 stops Frankfurt am Main San Francisco

$848United Airlines

Sun, Feb 14 - Thu, Feb 18

7:00 am - 11:00 amONT Ontario-ATH Athens Eleftherios V.

42h 00m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

6:45 am - 8:32 pmATH Athens Eleftherios V.-ONT Ontario

23h 47m2 stops Frankfurt am Main Denver Intl

$851United Airlines

Tue, Mar 2 - Fri, Mar 5

7:00 am - 11:00 amONT Ontario-ATH Athens Eleftherios V.

42h 00m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

7:05 am - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

25h 54m2 stops Zurich San Francisco

$852United Airlines

Tue, Mar 2 - Fri, Mar 5

4:19 pm - 1:00 amONT Ontario-ATH Athens Eleftherios V.

22h 41m2 stops Phoenix Sky Harbor Intl London Heathrow

7:30 am - 10:50 pmATH Athens Eleftherios V.-ONT Ontario

25h 20m2 stops London Heathrow Dallas/Fort Worth

$858British Airways

Wed, Feb 3 - Wed, Mar 31

11:27 am - 4:30 pmONT Ontario-ATH Athens Eleftherios V.

19h 03m2 stops San Francisco Frankfurt am Main

6:45 am - 5:59 pmATH Athens Eleftherios V.-ONT Ontario

21h 14m2 stops Frankfurt am Main San Francisco

$861United Airlines

Tue, Feb 16 - Tue, Feb 23

11:30 am - 6:05 amONT Ontario-ATH Athens Eleftherios V.

32h 35m2 stops Denver Intl Istanbul

10:10 am - 10:17 pmATH Athens Eleftherios V.-ONT Ontario

22h 07m2 stops Istanbul Denver Intl

$876Multiple Airlines

Wed, Dec 2 - Wed, Dec 9

8:00 am - 9:00 pmONT Ontario-ATH Athens Eleftherios V.

27h 00m3 stops Las Vegas Harry Reid Intl San Francisco Istanbul

10:10 am - 11:23 pmATH Athens Eleftherios V.-ONT Ontario

23h 13m2 stops Istanbul San Francisco

$899Multiple Airlines

Tue, Dec 1 - Tue, Dec 15

12:49 pm - 7:00 pmONT Ontario-ATH Athens Eleftherios V.

20h 11m2 stops Dallas/Fort Worth London Heathrow

7:55 am - 11:59 pmATH Athens Eleftherios V.-ONT Ontario

25h 04m2 stops London Heathrow Dallas/Fort Worth

$904British Airways

Mon, Mar 1 - Mon, Mar 15

12:49 pm - 7:00 pmONT Ontario-ATH Athens Eleftherios V.

20h 11m2 stops Dallas/Fort Worth London Heathrow

7:55 am - 10:13 pmATH Athens Eleftherios V.-ONT Ontario

23h 18m2 stops London Heathrow Phoenix Sky Harbor Intl

$907British Airways

Mon, Mar 1 - Mon, Mar 15

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

United Airlines flights from Ontario to Athens

Our best United Airlines deals on Ontario to Athens flight tickets

United Airlines

Feb 14

ONT11:27 amOntario

28h 03m

2 stops

ATH1:30 amAthens Eleftherios V.

Feb 18

ATH6:45 amAthens Eleftherios V.

25h 45m

2 stops

ONT10:30 pmOntario

$848

United Airlines

Mar 2

ONT7:00 amOntario

42h 00m

2 stops

ATH11:00 amAthens Eleftherios V.

Mar 5

ATH6:45 amAthens Eleftherios V.

23h 47m

2 stops

ONT8:32 pmOntario

$851

United Airlines

Mar 2

ONT7:00 amOntario

42h 00m

2 stops

ATH11:00 amAthens Eleftherios V.

Mar 5

ATH7:05 amAthens Eleftherios V.

25h 54m

2 stops

ONT10:59 pmOntario

$852

British Airways flights from Ontario to Athens

Our best British Airways deals on Ontario to Athens flight tickets

British Airways

Feb 3

ONT4:19 pmOntario

22h 41m

2 stops

ATH1:00 amAthens Eleftherios V.

Mar 31

ATH7:30 amAthens Eleftherios V.

25h 20m

2 stops

ONT10:50 pmOntario

$858

British Airways

Mar 1

ONT12:49 pmOntario

20h 11m

2 stops

ATH7:00 pmAthens Eleftherios V.

Mar 15

ATH7:55 amAthens Eleftherios V.

25h 04m

2 stops

ONT11:59 pmOntario

$904

British Airways

Mar 1

ONT12:49 pmOntario

20h 11m

2 stops

ATH7:00 pmAthens Eleftherios V.

Mar 15

ATH7:55 amAthens Eleftherios V.

23h 18m

2 stops

ONT10:13 pmOntario

$907

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 11/25

6:45 am-11:55 pm

3 stops31h 10m

Athens Eleftherios V.

Sun 12/6

9:45 pm-11:23 pm

3 stops35h 38m

$844

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 2/14

11:27 am-1:30 am

2 stops28h 03m

Athens Eleftherios V.

Thu 2/18

6:45 am-10:30 pm

2 stops25h 45m

$848

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 3/2

7:00 am-11:00 am

2 stops42h 00m

Athens Eleftherios V.

Fri 3/5

6:45 am-8:32 pm

2 stops23h 47m

$851

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 3/2

7:00 am-11:00 am

2 stops42h 00m

Athens Eleftherios V.

Fri 3/5

7:05 am-10:59 pm

2 stops25h 54m

$852

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 2/3

4:19 pm-1:00 am

2 stops22h 41m

Athens Eleftherios V.

Wed 3/31

7:30 am-10:50 pm

2 stops25h 20m

$858

Quickest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 2/16

11:27 am-4:30 pm

2 stops19h 03m

Athens Eleftherios V.

Tue 2/23

6:45 am-5:59 pm

2 stops21h 14m

$861

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 12/2

11:30 am-6:05 am

2 stops32h 35m

Athens Eleftherios V.

Wed 12/9

10:10 am-10:17 pm

2 stops22h 07m

$876

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 12/1

8:00 am-9:00 pm

3 stops27h 00m

Athens Eleftherios V.

Tue 12/15

10:10 am-11:23 pm

2 stops23h 13m

$899

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 3/1

12:49 pm-7:00 pm

2 stops20h 11m

Athens Eleftherios V.

Mon 3/15

7:55 am-11:59 pm

2 stops25h 04m

$904

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 3/1

12:49 pm-7:00 pm

2 stops20h 11m

Athens Eleftherios V.

Mon 3/15

7:55 am-10:13 pm

2 stops23h 18m

$907

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 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 $535. 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 5% 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

Best Price Found	$376
Fastest flight time	17h 35m
Direct flights	None

The best one-way flight to Athens from Ontario in the past 72 hours is $376. The best round-trip flight deal from Ontario to Athens found on momondo in the last 72 hours is $844.

The fastest flight from Ontario to Athens takes 17h 35m

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

Search flight deals

Frequently asked questions about flying from Ontario to Athens

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 35m.
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 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.

Piraeus

Glyfada

Hydra

Loutraki

Aegina

Corinth

Skala

Chalcis

Porto Cheli

Marathon

Tolo

Megalochori

Agia Marina

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.