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 28% 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.

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

United Airlines and KLM are the most popular carriers operating from Ontario to Athens Eleftherios V.

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.

$441 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 Atlanta Hartsfield-Jackson Paris Charles de Gaulle

6:10 am - 4:12 pmATH Athens Eleftherios V.-ONT Ontario

20h 02m2 stops Amsterdam Schiphol Salt Lake City

$682Delta

Wed, Jan 20 - Wed, Jan 27

6:20 am - 4:30 pmONT Ontario-ATH Athens Eleftherios V.

24h 10m2 stops Seattle/Tacoma Intl Amsterdam Schiphol

6:10 am - 4:24 pmATH Athens Eleftherios V.-ONT Ontario

20h 14m2 stops Amsterdam Schiphol Salt Lake City

$688KLM

Mon, Nov 2 - Wed, Nov 18

10:00 pm - 9:20 amONT Ontario-ATH Athens Eleftherios V.

25h 20m1 stop Atlanta Hartsfield-Jackson

1:35 pm - 11:16 amATH Athens Eleftherios V.-ONT Ontario

55h 41m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$695Delta

Sun, Oct 4 - Wed, Oct 14

12:17 pm - 7:50 amONT Ontario-ATH Athens Eleftherios V.

33h 33m2 stops Atlanta Hartsfield-Jackson New York LaGuardia

1:35 pm - 11:16 amATH Athens Eleftherios V.-ONT Ontario

55h 41m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$699Delta

Sat, Oct 3 - Tue, Oct 13

10:00 pm - 1:20 pmONT Ontario-ATH Athens Eleftherios V.

53h 20m2 stops Atlanta Hartsfield-Jackson New York John F Kennedy Intl

1:35 pm - 11:16 amATH Athens Eleftherios V.-ONT Ontario

55h 41m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$710Delta

Fri, Oct 2 - Wed, Oct 14

11:56 am - 10:55 pmONT Ontario-ATH Athens Eleftherios V.

24h 59m2 stops Seattle/Tacoma Intl Paris Charles de Gaulle

1:35 pm - 11:16 amATH Athens Eleftherios V.-ONT Ontario

55h 41m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$714Delta

Tue, Oct 6 - Tue, Oct 13

12:00 pm - 4:35 pmONT Ontario-ATH Athens Eleftherios V.

18h 35m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

6:10 am - 4:12 pmATH Athens Eleftherios V.-ONT Ontario

20h 02m2 stops Amsterdam Schiphol Salt Lake City

$743KLM

Thu, Jan 21 - Thu, Jan 28

12:00 pm - 4:35 pmONT Ontario-ATH Athens Eleftherios V.

18h 35m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

6:10 am - 4:12 pmATH Athens Eleftherios V.-ONT Ontario

20h 02m2 stops Amsterdam Schiphol Salt Lake City

$744KLM

Thu, Jan 21 - Fri, Jan 29

7:07 am - 11:00 amONT Ontario-ATH Athens Eleftherios V.

17h 53m1 stop Atlanta Hartsfield-Jackson

6:10 am - 4:23 pmATH Athens Eleftherios V.-ONT Ontario

20h 13m2 stops Amsterdam Schiphol Salt Lake City

$753KLM

Tue, Oct 20 - Wed, Nov 4

6:20 am - 11:00 pmONT Ontario-ATH Athens Eleftherios V.

30h 40m2 stops Seattle/Tacoma Intl Paris Charles de Gaulle

1:35 pm - 11:16 amATH Athens Eleftherios V.-ONT Ontario

55h 41m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$774Delta

Thu, Oct 8 - Wed, Oct 14

Cheap last minute flights

Enter your travel dates to find the best prices.

10:00 pm - 9:20 amONT Ontario-ATH Athens Eleftherios V.

25h 20m1 stop Atlanta Hartsfield-Jackson

6:00 am - 5:12 pmATH Athens Eleftherios V.-ONT Ontario

21h 12m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$872Delta

Fri, Sep 25 - Wed, Oct 7

7:00 am - 10:35 amONT Ontario-ATH Athens Eleftherios V.

17h 35m1 stop Chicago O'Hare Intl

6:45 am - 10:51 pmATH Athens Eleftherios V.-ONT Ontario

26h 06m2 stops Frankfurt am Main San Francisco

$977United Airlines

Wed, Sep 23 - Wed, Oct 7

7:00 am - 10:35 amONT Ontario-ATH Athens Eleftherios V.

17h 35m1 stop Chicago O'Hare Intl

12:45 pm - 10:51 pmATH Athens Eleftherios V.-ONT Ontario

20h 06m2 stops Munich Franz Josef Strauss San Francisco

$978United Airlines

Wed, Sep 23 - Thu, Oct 8

7:00 am - 10:35 amONT Ontario-ATH Athens Eleftherios V.

17h 35m1 stop Chicago O'Hare Intl

12:55 pm - 10:49 pmATH Athens Eleftherios V.-ONT Ontario

19h 54m1 stop Chicago O'Hare Intl

$1,086United Airlines

Wed, Sep 23 - Fri, Oct 2

7:00 am - 10:35 amONT Ontario-ATH Athens Eleftherios V.

17h 35m1 stop Chicago O'Hare Intl

6:00 am - 8:31 pmATH Athens Eleftherios V.-ONT Ontario

24h 31m2 stops Munich Franz Josef Strauss San Francisco

$1,091United Airlines

Wed, Sep 23 - Tue, Oct 6

7:05 am - 11:00 amONT Ontario-ATH Athens Eleftherios V.

17h 55m1 stop Atlanta Hartsfield-Jackson

12:10 pm - 10:24 pmATH Athens Eleftherios V.-ONT Ontario

20h 14m1 stop Atlanta Hartsfield-Jackson

$1,101KLM

Wed, Sep 23 - Fri, Oct 2

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

18h 00m1 stop Chicago O'Hare Intl

12:55 pm - 10:49 pmATH Athens Eleftherios V.-ONT Ontario

19h 54m1 stop Chicago O'Hare Intl

$1,146United Airlines

Thu, Sep 24 - Fri, Oct 2

12:07 pm - 6:35 pmONT Ontario-ATH Athens Eleftherios V.

20h 28m2 stops San Francisco Rome Fiumicino

7:30 pm - 7:40 pmATH Athens Eleftherios V.-ONT Ontario

34h 10m2 stops Rome Fiumicino San Francisco

$1,159Multiple Airlines

Thu, Sep 24 - Thu, Oct 8

7:05 am - 10:00 amONT Ontario-ATH Athens Eleftherios V.

16h 55m1 stop Atlanta Hartsfield-Jackson

12:10 pm - 10:24 pmATH Athens Eleftherios V.-ONT Ontario

20h 14m1 stop Atlanta Hartsfield-Jackson

$1,161KLM

Thu, Sep 24 - Fri, Oct 2

7:00 am - 10:35 amONT Ontario-ATH Athens Eleftherios V.

17h 35m1 stop Chicago O'Hare Intl

12:55 pm - 10:49 pmATH Athens Eleftherios V.-ONT Ontario

19h 54m1 stop Chicago O'Hare Intl

$1,273United Airlines

Fri, Sep 25 - Fri, Oct 2

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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 2

ONT6:53 pmOntario

30h 07m

3 stops

ATH11:00 amAthens Eleftherios V.

Mar 5

ATH1:00 pmAthens Eleftherios V.

39h 44m

2 stops

ONT6:44 pmOntario

$814

United Airlines

Mar 2

ONT6:30 amOntario

42h 30m

2 stops

ATH11:00 amAthens Eleftherios V.

Mar 5

ATH1:00 pmAthens Eleftherios V.

39h 44m

2 stops

ONT6:44 pmOntario

$820

United Airlines

Mar 2

ONT6:53 pmOntario

30h 07m

3 stops

ATH11:00 amAthens Eleftherios V.

Mar 5

ATH6:45 amAthens Eleftherios V.

23h 35m

2 stops

ONT8:20 pmOntario

$836

Delta flights from Ontario to Athens

Our best Delta deals on Ontario to Athens flight tickets

Delta

Jan 20

ONT7:00 amOntario

20h 40m

2 stops

ATH1:40 pmAthens Eleftherios V.

Jan 27

ATH6:10 amAthens Eleftherios V.

20h 02m

2 stops

ONT4:12 pmOntario

$682

Delta

Oct 4

ONT10:00 pmOntario

25h 20m

1 stop

ATH9:20 amAthens Eleftherios V.

Oct 14

ATH1:35 pmAthens Eleftherios V.

55h 41m

2 stops

ONT11:16 amOntario

$695

Delta

Oct 3

ONT12:17 pmOntario

33h 33m

2 stops

ATH7:50 amAthens Eleftherios V.

Oct 13

ATH1:35 pmAthens Eleftherios V.

55h 41m

2 stops

ONT11:16 amOntario

$699

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 1/20

7:00 am-1:40 pm

2 stops20h 40m

Athens Eleftherios V.

Wed 1/27

6:10 am-4:12 pm

2 stops20h 02m

$682

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 11/2

6:20 am-4:30 pm

2 stops24h 10m

Athens Eleftherios V.

Wed 11/18

6:10 am-4:24 pm

2 stops20h 14m

$688

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 10/4

10:00 pm-9:20 am

1 stop25h 20m

Athens Eleftherios V.

Wed 10/14

1:35 pm-11:16 am

2 stops55h 41m

$695

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sat 10/3

12:17 pm-7:50 am

2 stops33h 33m

Athens Eleftherios V.

Tue 10/13

1:35 pm-11:16 am

2 stops55h 41m

$699

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Fri 10/2

10:00 pm-1:20 pm

2 stops53h 20m

Athens Eleftherios V.

Wed 10/14

1:35 pm-11:16 am

2 stops55h 41m

$710

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 10/6

11:56 am-10:55 pm

2 stops24h 59m

Athens Eleftherios V.

Tue 10/13

1:35 pm-11:16 am

2 stops55h 41m

$714

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Thu 1/21

12:00 pm-4:35 pm

2 stops18h 35m

Athens Eleftherios V.

Thu 1/28

6:10 am-4:12 pm

2 stops20h 02m

$743

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Thu 1/21

12:00 pm-4:35 pm

2 stops18h 35m

Athens Eleftherios V.

Fri 1/29

6:10 am-4:12 pm

2 stops20h 02m

$744

Quickest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 10/20

7:07 am-11:00 am

1 stop17h 53m

Athens Eleftherios V.

Wed 11/4

6:10 am-4:23 pm

2 stops20h 13m

$753

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Thu 10/8

6:20 am-11:00 pm

2 stops30h 40m

Athens Eleftherios V.

Wed 10/14

1:35 pm-11:16 am

2 stops55h 41m

$774

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 32% 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	$441
Fastest flight time	17h 30m
Direct flights	None

The best one-way flight to Athens from Ontario in the past 72 hours is $441. The best round-trip flight deal from Ontario to Athens found on momondo in the last 72 hours is $682.

The fastest flight from Ontario to Athens takes 17h 30m

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 30m.
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

Loutraki

Hydra

Corinth

Aegina

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.