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.?

British Airways, Air Canada, 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.

$373 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

5:25 pm - 10:43 pmATH Athens Eleftherios V.-ONT Ontario

39h 18m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$837Multiple Airlines

Sun, Jan 17 - Tue, Jan 26

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

20h 40m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:25 pm - 10:43 pmATH Athens Eleftherios V.-ONT Ontario

39h 18m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$838Multiple Airlines

Sun, Jan 17 - Tue, Jan 26

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

18h 30m2 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

$842KLM

Tue, Feb 9 - Tue, Feb 23

6:00 am - 4:30 pmONT Ontario-ATH Athens Eleftherios V.

24h 30m2 stops San Francisco Frankfurt am Main

6:45 am - 8:20 pmATH Athens Eleftherios V.-ONT Ontario

23h 35m2 stops Frankfurt am Main Denver Intl

$850United Airlines

Tue, Mar 2 - Fri, Mar 5

6:00 am - 4:30 pmONT Ontario-ATH Athens Eleftherios V.

24h 30m2 stops San Francisco Frankfurt am Main

6:45 am - 8:20 pmATH Athens Eleftherios V.-ONT Ontario

23h 35m2 stops Frankfurt am Main Denver Intl

$851United Airlines

Tue, Mar 2 - Fri, Mar 5

3:59 pm - 4:30 pmONT Ontario-ATH Athens Eleftherios V.

38h 31m2 stops San Francisco Frankfurt am Main

7:05 am - 9:57 amATH Athens Eleftherios V.-ONT Ontario

36h 52m2 stops Zurich San Francisco

$862United Airlines

Sat, Jan 16 - Fri, Jan 22

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

19h 00m2 stops San Francisco Montreal Pierre Elliott Trudeau Intl

7:05 am - 8:25 pmATH Athens Eleftherios V.-ONT Ontario

23h 20m2 stops Zurich San Francisco

$885United Airlines

Thu, Jan 7 - Thu, Jan 21

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

20h 40m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

6:10 am - 10:48 pmATH Athens Eleftherios V.-ONT Ontario

26h 38m2 stops Amsterdam Schiphol Salt Lake City

$887Delta

Sun, Feb 7 - Sat, Feb 13

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

18h 30m2 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

$891KLM

Mon, Jan 11 - Mon, Jan 25

4:19 pm - 10:00 pmONT Ontario-ATH Athens Eleftherios V.

19h 41m2 stops Phoenix Sky Harbor Intl London Heathrow

7:35 am - 11:13 pmATH Athens Eleftherios V.-ONT Ontario

25h 38m2 stops London Heathrow Dallas/Fort Worth

$896British Airways

Fri, Jan 15 - Fri, Jan 22

Cheap last minute flights

Enter your travel dates to find the best prices.

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

17h 53m1 stop Atlanta Hartsfield-Jackson

9:45 am - 8:25 pmATH Athens Eleftherios V.-ONT Ontario

20h 40m1 stop Atlanta Hartsfield-Jackson

$1,069Delta

Sun, Oct 11 - Tue, Oct 20

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

17h 35m1 stop Chicago O'Hare Intl

12:30 pm - 10:49 pmATH Athens Eleftherios V.-ONT Ontario

20h 19m1 stop Chicago O'Hare Intl

$1,073United Airlines

Tue, Oct 13 - Thu, Oct 22

4:03 pm - 8:10 amONT Ontario-ATH Athens Eleftherios V.

30h 07m2 stops San Francisco Newark

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

19h 54m1 stop Chicago O'Hare Intl

$1,074United Airlines

Sun, Oct 11 - Fri, Oct 23

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

17h 53m1 stop Atlanta Hartsfield-Jackson

6:00 am - 10:43 pmATH Athens Eleftherios V.-ONT Ontario

26h 43m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,077KLM

Tue, Oct 13 - Wed, Oct 21

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

18h 00m2 stops Houston George Bush Intcntl Washington, D.C. Dulles Intl

10:25 am - 8:58 pmATH Athens Eleftherios V.-ONT Ontario

20h 33m2 stops Newark Denver Intl

$1,078United Airlines

Tue, Oct 13 - Tue, Oct 20

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

17h 53m1 stop Atlanta Hartsfield-Jackson

1:35 pm - 5:12 pmATH Athens Eleftherios V.-ONT Ontario

61h 37m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,080Delta

Sun, Oct 11 - Mon, Oct 19

7:07 am - 12:50 pmONT Ontario-ATH Athens Eleftherios V.

19h 43m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

9:45 am - 8:25 pmATH Athens Eleftherios V.-ONT Ontario

20h 40m1 stop Atlanta Hartsfield-Jackson

$1,081KLM

Wed, Oct 14 - Tue, Oct 20

11:56 am - 11:00 pmONT Ontario-ATH Athens Eleftherios V.

25h 04m2 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

$1,083Delta

Sun, Oct 11 - Mon, Oct 19

7:07 am - 4:30 pmONT Ontario-ATH Athens Eleftherios V.

23h 23m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

6:00 am - 10:43 pmATH Athens Eleftherios V.-ONT Ontario

26h 43m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,085KLM

Tue, Oct 13 - Wed, Oct 21

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

$1,123United Airlines

Thu, Oct 15 - Fri, Oct 23

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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

ONT6:00 amOntario

24h 30m

2 stops

ATH4:30 pmAthens Eleftherios V.

Mar 5

ATH6:45 amAthens Eleftherios V.

23h 35m

2 stops

ONT8:20 pmOntario

$850

United Airlines

Mar 2

ONT6:00 amOntario

24h 30m

2 stops

ATH4:30 pmAthens Eleftherios V.

Mar 5

ATH6:45 amAthens Eleftherios V.

23h 35m

2 stops

ONT8:20 pmOntario

$851

United Airlines

Jan 16

ONT3:59 pmOntario

38h 31m

2 stops

ATH4:30 pmAthens Eleftherios V.

Jan 22

ATH7:05 amAthens Eleftherios V.

36h 52m

2 stops

ONT9:57 amOntario

$862

Delta flights from Ontario to Athens

Our best Delta deals on Ontario to Athens flight tickets

Delta

Feb 7

ONT7:00 amOntario

20h 40m

2 stops

ATH1:40 pmAthens Eleftherios V.

Feb 13

ATH6:10 amAthens Eleftherios V.

26h 38m

2 stops

ONT10:48 pmOntario

$887

Delta

Oct 11

ONT7:07 amOntario

17h 53m

1 stop

ATH11:00 amAthens Eleftherios V.

Oct 20

ATH9:45 amAthens Eleftherios V.

20h 40m

1 stop

ONT8:25 pmOntario

$1,069

Delta

Oct 11

ONT7:07 amOntario

17h 53m

1 stop

ATH11:00 amAthens Eleftherios V.

Oct 19

ATH1:35 pmAthens Eleftherios V.

61h 37m

2 stops

ONT5:12 pmOntario

$1,080

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 1/17

7:00 am-1:40 pm

2 stops20h 40m

Athens Eleftherios V.

Tue 1/26

5:25 pm-10:43 pm

2 stops39h 18m

$837

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 1/17

7:00 am-1:40 pm

2 stops20h 40m

Athens Eleftherios V.

Tue 1/26

5:25 pm-10:43 pm

2 stops39h 18m

$838

Quickest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 2/9

12:00 pm-4:30 pm

2 stops18h 30m

Athens Eleftherios V.

Tue 2/23

6:10 am-4:12 pm

2 stops20h 02m

$842

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 3/2

6:00 am-4:30 pm

2 stops24h 30m

Athens Eleftherios V.

Fri 3/5

6:45 am-8:20 pm

2 stops23h 35m

$850

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 3/2

6:00 am-4:30 pm

2 stops24h 30m

Athens Eleftherios V.

Fri 3/5

6:45 am-8:20 pm

2 stops23h 35m

$851

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sat 1/16

3:59 pm-4:30 pm

2 stops38h 31m

Athens Eleftherios V.

Fri 1/22

7:05 am-9:57 am

2 stops36h 52m

$862

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Thu 1/7

6:00 am-11:00 am

2 stops19h 00m

Athens Eleftherios V.

Thu 1/21

7:05 am-8:25 pm

2 stops23h 20m

$885

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 2/7

7:00 am-1:40 pm

2 stops20h 40m

Athens Eleftherios V.

Sat 2/13

6:10 am-10:48 pm

2 stops26h 38m

$887

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 1/11

12:00 pm-4:30 pm

2 stops18h 30m

Athens Eleftherios V.

Mon 1/25

6:10 am-4:12 pm

2 stops20h 02m

$891

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Fri 1/15

4:19 pm-10:00 pm

2 stops19h 41m

Athens Eleftherios V.

Fri 1/22

7:35 am-11:13 pm

2 stops25h 38m

$896

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	$373
Fastest flight time	18h 05m
Direct flights	None

The best one-way flight to Athens from Ontario in the past 72 hours is $373. The best round-trip flight deal from Ontario to Athens found on momondo in the last 72 hours is $837.

The fastest flight from Ontario to Athens takes 18h 05m

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 18h 05m.
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

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Hydra

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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.