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

United 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.

$386 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.

7:00 am - 1:40 pmONT Ontario-ATH Athens Eleftherios V.

20h 40m2 stops Seattle/Tacoma Intl Paris Charles de Gaulle

9:45 am - 6:22 pmATH Athens Eleftherios V.-ONT Ontario

18h 37m1 stop Atlanta Hartsfield-Jackson

$841Multiple Airlines

Sun, Apr 4 - Tue, Apr 13

7:00 am - 1:40 pmONT Ontario-ATH Athens Eleftherios V.

20h 40m2 stops Seattle/Tacoma Intl Paris Charles de Gaulle

6:00 am - 6:22 pmATH Athens Eleftherios V.-ONT Ontario

22h 22m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$844Multiple Airlines

Sun, Apr 4 - Tue, Apr 13

6:00 am - 10:05 amONT Ontario-ATH Athens Eleftherios V.

18h 05m2 stops Houston George Bush Intcntl Newark

6:45 am - 8:19 pmATH Athens Eleftherios V.-ONT Ontario

22h 34m2 stops Frankfurt am Main San Francisco

$847United Airlines

Wed, Mar 10 - Wed, Mar 17

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

28h 03m2 stops San Francisco Munich Franz Josef Strauss

7:05 am - 8:34 pmATH Athens Eleftherios V.-ONT Ontario

23h 29m2 stops Zurich San Francisco

$849United Airlines

Sun, Feb 14 - Thu, Feb 18

12:00 pm - 4:30 pmONT Ontario-ATH Athens Eleftherios V.

18h 30m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

6:10 am - 5:17 pmATH Athens Eleftherios V.-ONT Ontario

20h 07m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$851KLM

Tue, Mar 9 - Tue, Mar 16

6:53 pm - 10:10 amONT Ontario-ATH Athens Eleftherios V.

29h 17m3 stops San Francisco Boston Logan Intl Montreal Pierre Elliott Trudeau Intl

12:10 pm - 8:07 pmATH Athens Eleftherios V.-ONT Ontario

41h 57m2 stops Montreal Pierre Elliott Trudeau Intl San Francisco

$881United Airlines

Sun, May 2 - Sun, May 16

6:00 am - 11:10 amONT Ontario-ATH Athens Eleftherios V.

43h 10m2 stops Houston George Bush Intcntl Toronto Pearson Intl

12:10 pm - 8:07 pmATH Athens Eleftherios V.-ONT Ontario

41h 57m2 stops Montreal Pierre Elliott Trudeau Intl San Francisco

$892United Airlines

Sun, May 2 - Sun, May 16

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

18h 00m1 stop Atlanta Hartsfield-Jackson

9:45 am - 6:22 pmATH Athens Eleftherios V.-ONT Ontario

18h 37m1 stop Atlanta Hartsfield-Jackson

$898KLM

Fri, Apr 9 - Fri, Apr 23

6:00 am - 8:10 amONT Ontario-ATH Athens Eleftherios V.

40h 10m2 stops Houston George Bush Intcntl Newark

12:10 pm - 3:27 pmATH Athens Eleftherios V.-ONT Ontario

61h 17m2 stops Montreal Pierre Elliott Trudeau Intl San Francisco

$899Multiple Airlines

Tue, May 4 - Sun, May 16

10:38 am - 3:55 pmONT Ontario-ATH Athens Eleftherios V.

19h 17m2 stops Dallas/Fort Worth London Heathrow

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

24h 18m2 stops London Heathrow Phoenix Sky Harbor Intl

$906British Airways

Mon, Feb 8 - Mon, Feb 22

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United Airlines flights from Ontario to Athens

Our best United Airlines deals on Ontario to Athens flight tickets

United Airlines

Mar 10

ONT6:00 amOntario

18h 05m

2 stops

ATH10:05 amAthens Eleftherios V.

Mar 17

ATH6:45 amAthens Eleftherios V.

22h 34m

2 stops

ONT8:19 pmOntario

$847

United Airlines

Feb 14

ONT11:27 amOntario

28h 03m

2 stops

ATH1:30 amAthens Eleftherios V.

Feb 18

ATH7:05 amAthens Eleftherios V.

23h 29m

2 stops

ONT8:34 pmOntario

$849

United Airlines

May 2

ONT6:53 pmOntario

29h 17m

3 stops

ATH10:10 amAthens Eleftherios V.

May 16

ATH12:10 pmAthens Eleftherios V.

41h 57m

2 stops

ONT8:07 pmOntario

$881

KLM flights from Ontario to Athens

Our best KLM deals on Ontario to Athens flight tickets

KLM

Mar 9

ONT12:00 pmOntario

18h 30m

2 stops

ATH4:30 pmAthens Eleftherios V.

Mar 16

ATH6:10 amAthens Eleftherios V.

20h 07m

2 stops

ONT5:17 pmOntario

$851

KLM

Apr 9

ONT7:00 amOntario

18h 00m

1 stop

ATH11:00 amAthens Eleftherios V.

Apr 23

ATH9:45 amAthens Eleftherios V.

18h 37m

1 stop

ONT6:22 pmOntario

$898

KLM

Apr 6

ONT7:00 amOntario

18h 00m

1 stop

ATH11:00 amAthens Eleftherios V.

Apr 20

ATH9:45 amAthens Eleftherios V.

18h 37m

1 stop

ONT6:22 pmOntario

$921

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 4/4

7:00 am-1:40 pm

2 stops20h 40m

Athens Eleftherios V.

Tue 4/13

9:45 am-6:22 pm

1 stop18h 37m

$841

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 4/4

7:00 am-1:40 pm

2 stops20h 40m

Athens Eleftherios V.

Tue 4/13

6:00 am-6:22 pm

2 stops22h 22m

$844

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 3/10

6:00 am-10:05 am

2 stops18h 05m

Athens Eleftherios V.

Wed 3/17

6:45 am-8:19 pm

2 stops22h 34m

$847

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

7:05 am-8:34 pm

2 stops23h 29m

$849

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 3/9

12:00 pm-4:30 pm

2 stops18h 30m

Athens Eleftherios V.

Tue 3/16

6:10 am-5:17 pm

2 stops20h 07m

$851

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 5/2

6:53 pm-10:10 am

3 stops29h 17m

Athens Eleftherios V.

Sun 5/16

12:10 pm-8:07 pm

2 stops41h 57m

$881

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 5/2

6:00 am-11:10 am

2 stops43h 10m

Athens Eleftherios V.

Sun 5/16

12:10 pm-8:07 pm

2 stops41h 57m

$892

Quickest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Fri 4/9

7:00 am-11:00 am

1 stop18h 00m

Athens Eleftherios V.

Fri 4/23

9:45 am-6:22 pm

1 stop18h 37m

$898

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 5/4

6:00 am-8:10 am

2 stops40h 10m

Athens Eleftherios V.

Sun 5/16

12:10 pm-3:27 pm

2 stops61h 17m

$899

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 2/8

10:38 am-3:55 pm

2 stops19h 17m

Athens Eleftherios V.

Mon 2/22

7:55 am-10:13 pm

2 stops24h 18m

$906

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	$386
Fastest flight time	16h 16m
Direct flights	None

The best one-way flight to Athens from Ontario in the past 72 hours is $386. The best round-trip flight deal from Ontario to Athens found on momondo in the last 72 hours is $841.

The fastest flight from Ontario to Athens takes 16h 16m

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 16h 16m.
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.

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Corinth

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Skala

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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.