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 27% of people opting to fly with this airline when traveling to Athens. Keep in mind that there are 19 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.?

KLM, Delta, and United Airlines 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.

$457 Cheap Flights from Ontario to Athens in 2026

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 amONT Ontario-ATH Athens Eleftherios V.

17h 35m1 stop Chicago O'Hare Intl

1:10 pm - 10:51 pmATH Athens Eleftherios V.-ONT Ontario

43h 41m2 stops Montreal Pierre Elliott Trudeau Intl San Francisco

$824United Airlines

Sun, Oct 11 - Wed, Oct 21

6:07 am - 10:35 amONT Ontario-ATH Athens Eleftherios V.

18h 28m2 stops San Francisco Chicago O'Hare Intl

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

44h 39m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$833United Airlines

Sun, Oct 11 - Wed, Oct 21

1:33 pm - 1:30 amONT Ontario-ATH Athens Eleftherios V.

25h 57m2 stops San Francisco Munich Franz Josef Strauss

6:45 am - 11:06 pmATH Athens Eleftherios V.-ONT Ontario

26h 21m2 stops Frankfurt am Main San Francisco

$842United Airlines

Sun, Feb 28 - Fri, Mar 5

6:53 pm - 1:30 amONT Ontario-ATH Athens Eleftherios V.

20h 37m2 stops San Francisco Munich Franz Josef Strauss

6:45 am - 11:06 pmATH Athens Eleftherios V.-ONT Ontario

26h 21m2 stops Frankfurt am Main San Francisco

$842United Airlines

Mon, Mar 1 - Fri, Mar 5

11:20 am - 1:30 amONT Ontario-ATH Athens Eleftherios V.

28h 10m2 stops San Francisco Munich Franz Josef Strauss

6:45 am - 11:06 pmATH Athens Eleftherios V.-ONT Ontario

26h 21m2 stops Frankfurt am Main San Francisco

$842United Airlines

Sun, Feb 28 - Thu, Mar 4

6:53 pm - 1:30 amONT Ontario-ATH Athens Eleftherios V.

20h 37m2 stops San Francisco Munich Franz Josef Strauss

6:45 am - 11:06 pmATH Athens Eleftherios V.-ONT Ontario

26h 21m2 stops Frankfurt am Main San Francisco

$842United Airlines

Mon, Mar 1 - Thu, Mar 4

7:00 am - 12:40 pmONT Ontario-ATH Athens Eleftherios V.

19h 40m2 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

$844KLM

Tue, Mar 2 - Tue, Mar 16

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

$844KLM

Sun, Oct 11 - Wed, Oct 21

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

$844KLM

Wed, Feb 3 - Wed, Feb 17

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

$844KLM

Tue, Feb 2 - Tue, Feb 16

Cheap last minute flights

Enter your travel dates to find the best prices.

7:05 am - 11:45 amONT Ontario-ATH Athens Eleftherios V.

18h 40m1 stop Dallas/Fort Worth

1:00 pm - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

19h 59m1 stop Charlotte Douglas

$1,224British Airways

Mon, Sep 7 - Wed, Oct 7

7:05 am - 11:45 amONT Ontario-ATH Athens Eleftherios V.

18h 40m1 stop Dallas/Fort Worth

2:00 pm - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

18h 59m1 stop Dallas/Fort Worth

$1,230Iberia

Sun, Sep 6 - Tue, Sep 8

6:08 am - 10:00 amONT Ontario-ATH Athens Eleftherios V.

17h 52m2 stops San Francisco Washington, D.C. Dulles Intl

12:35 pm - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

20h 24m1 stop Chicago O'Hare Intl

$1,230United Airlines

Tue, Sep 8 - Fri, Sep 11

6:00 am - 1:40 pmONT Ontario-ATH Athens Eleftherios V.

21h 40m2 stops Seattle/Tacoma Intl Paris Charles de Gaulle

6:00 am - 10:40 pmATH Athens Eleftherios V.-ONT Ontario

26h 40m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,238Delta

Tue, Sep 8 - Fri, Sep 11

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

16h 55m1 stop Atlanta Hartsfield-Jackson

11:30 am - 10:24 pmATH Athens Eleftherios V.-ONT Ontario

20h 54m1 stop Atlanta Hartsfield-Jackson

$1,329Air France

Sun, Sep 6 - Sun, Sep 13

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

17h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 8:24 pmATH Athens Eleftherios V.-ONT Ontario

20h 39m1 stop Atlanta Hartsfield-Jackson

$1,468KLM

Sun, Sep 6 - Wed, Sep 30

7:05 am - 11:45 amONT Ontario-ATH Athens Eleftherios V.

18h 40m1 stop Dallas/Fort Worth

1:50 pm - 9:29 amATH Athens Eleftherios V.-ONT Ontario

29h 39m2 stops Philadelphia Dallas/Fort Worth

$1,494American Airlines

Mon, Sep 7 - Mon, Sep 14

7:05 am - 11:45 amONT Ontario-ATH Athens Eleftherios V.

18h 40m1 stop Dallas/Fort Worth

1:50 pm - 9:29 amATH Athens Eleftherios V.-ONT Ontario

29h 39m2 stops Philadelphia Dallas/Fort Worth

$1,494American Airlines

Sun, Sep 6 - Mon, Sep 14

6:15 am - 11:00 amONT Ontario-ATH Athens Eleftherios V.

18h 45m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

1:50 pm - 9:29 amATH Athens Eleftherios V.-ONT Ontario

29h 39m2 stops Philadelphia Dallas/Fort Worth

$1,494American Airlines

Mon, Sep 7 - Mon, Sep 14

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

16h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 6:07 pmATH Athens Eleftherios V.-ONT Ontario

18h 22m1 stop Atlanta Hartsfield-Jackson

$1,579Multiple Airlines

Sun, Sep 6 - Mon, Sep 14

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United Airlines flights from Ontario to Athens

Our best United Airlines deals on Ontario to Athens flight tickets

United Airlines

Oct 11

ONT7:00 amOntario

17h 35m

1 stop

ATH10:35 amAthens Eleftherios V.

Oct 21

ATH1:10 pmAthens Eleftherios V.

43h 41m

2 stops

ONT10:51 pmOntario

$824

United Airlines

Oct 11

ONT6:07 amOntario

18h 28m

2 stops

ATH10:35 amAthens Eleftherios V.

Oct 21

ATH12:10 pmAthens Eleftherios V.

44h 39m

2 stops

ONT10:49 pmOntario

$833

United Airlines

Feb 28

ONT1:33 pmOntario

25h 57m

2 stops

ATH1:30 amAthens Eleftherios V.

Mar 5

ATH6:45 amAthens Eleftherios V.

26h 21m

2 stops

ONT11:06 pmOntario

$842

Delta flights from Ontario to Athens

Our best Delta deals on Ontario to Athens flight tickets

Delta

Feb 28

ONT7:00 amOntario

19h 40m

2 stops

ATH12:40 pmAthens Eleftherios V.

Mar 8

ATH1:35 pmAthens Eleftherios V.

36h 37m

2 stops

ONT4:12 pmOntario

$845

Delta

Feb 27

ONT1:00 pmOntario

41h 35m

2 stops

ATH4:35 pmAthens Eleftherios V.

Mar 8

ATH1:35 pmAthens Eleftherios V.

44h 13m

2 stops

ONT11:48 pmOntario

$850

Delta

Oct 19

ONT11:08 pmOntario

25h 52m

1 stop

ATH11:00 amAthens Eleftherios V.

Oct 27

ATH1:35 pmAthens Eleftherios V.

30h 31m

2 stops

ONT11:06 amOntario

$862

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 10/11

7:00 am-10:35 am

1 stop17h 35m

Athens Eleftherios V.

Wed 10/21

1:10 pm-10:51 pm

2 stops43h 41m

$824

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 10/11

6:07 am-10:35 am

2 stops18h 28m

Athens Eleftherios V.

Wed 10/21

12:10 pm-10:49 pm

2 stops44h 39m

$833

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 2/28

1:33 pm-1:30 am

2 stops25h 57m

Athens Eleftherios V.

Fri 3/5

6:45 am-11:06 pm

2 stops26h 21m

$842

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 3/1

6:53 pm-1:30 am

2 stops20h 37m

Athens Eleftherios V.

Fri 3/5

6:45 am-11:06 pm

2 stops26h 21m

$842

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 2/28

11:20 am-1:30 am

2 stops28h 10m

Athens Eleftherios V.

Thu 3/4

6:45 am-11:06 pm

2 stops26h 21m

$842

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 3/1

6:53 pm-1:30 am

2 stops20h 37m

Athens Eleftherios V.

Thu 3/4

6:45 am-11:06 pm

2 stops26h 21m

$842

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 3/2

7:00 am-12:40 pm

2 stops19h 40m

Athens Eleftherios V.

Tue 3/16

6:10 am-5:17 pm

2 stops20h 07m

$844

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 10/11

7:07 am-11:00 am

1 stop17h 53m

Athens Eleftherios V.

Wed 10/21

9:45 am-8:25 pm

1 stop20h 40m

$844

Quickest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 2/3

12:00 pm-4:30 pm

2 stops18h 30m

Athens Eleftherios V.

Wed 2/17

6:10 am-4:12 pm

2 stops20h 02m

$844

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 2/2

12:00 pm-4:30 pm

2 stops18h 30m

Athens Eleftherios V.

Tue 2/16

6:10 am-4:12 pm

2 stops20h 02m

$844

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 day to depart on your flight to Athens?

The cheapest day to depart on your flight to Athens is on a Wednesday when prices can be found for as low as $493. 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 Friday because tickets tend to average around $751. 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 $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 35% 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	$457
Fastest flight time	17h 35m
Direct flights	None

The best one-way flight to Athens from Ontario in the past 72 hours is $457. The best round-trip flight deal from Ontario to Athens found on momondo in the last 72 hours is $824.

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.

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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.