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

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

What airlines fly to Athens?

Turkish Airlines, United Airlines and British Airways are the top three most popular airlines that fly to Athens from Ontario according to our data. Turkish 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 19 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.

$389 Cheap Flights from Ontario to Athens in 2026

Find the cheapest flights from Ontario to Athens

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One-way

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Cheap round-trip flights

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

18h 05m2 stops Houston George Bush Intcntl Newark

1:00 pm - 3:59 pmATH Athens Eleftherios V.-ONT Ontario

36h 59m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$810United Airlines

Wed, Nov 11 - Wed, Nov 25

6:00 am - 1:30 amONT Ontario-ATH Athens Eleftherios V.

33h 30m2 stops San Francisco Munich Franz Josef Strauss

1:00 pm - 6:44 pmATH Athens Eleftherios V.-ONT Ontario

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

$817United Airlines

Mon, Dec 28 - Fri, Jan 8

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

18h 05m2 stops Houston George Bush Intcntl Newark

6:40 am - 5:47 pmATH Athens Eleftherios V.-ONT Ontario

21h 07m2 stops Munich Franz Josef Strauss San Francisco

$829United Airlines

Wed, Nov 18 - Wed, Dec 2

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

45h 40m2 stops Salt Lake City Paris Charles de Gaulle

6:10 am - 10:08 pmATH Athens Eleftherios V.-ONT Ontario

25h 58m2 stops Amsterdam Schiphol Salt Lake City

$830Delta

Sun, Nov 22 - Fri, Nov 27

6:00 am - 1:30 amONT Ontario-ATH Athens Eleftherios V.

33h 30m2 stops San Francisco Munich Franz Josef Strauss

12:55 pm - 11:06 pmATH Athens Eleftherios V.-ONT Ontario

20h 11m2 stops Munich Franz Josef Strauss San Francisco

$837United Airlines

Mon, Dec 28 - Thu, Jan 7

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

$839KLM

Wed, Jan 13 - Wed, Jan 27

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

25h 20m1 stop Atlanta Hartsfield-Jackson

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

26h 43m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$848Delta

Sun, Oct 4 - Wed, Oct 14

11:54 am - 11:00 pmONT Ontario-ATH Athens Eleftherios V.

25h 06m2 stops Seattle/Tacoma Intl Paris Charles de Gaulle

6:00 am - 5:19 pmATH Athens Eleftherios V.-ONT Ontario

21h 19m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$852Delta

Wed, Sep 23 - Tue, Sep 29

8:03 am - 11:05 pmONT Ontario-ATH Athens Eleftherios V.

29h 02m2 stops San Francisco Munich Franz Josef Strauss

6:00 am - 10:51 pmATH Athens Eleftherios V.-ONT Ontario

26h 51m2 stops Munich Franz Josef Strauss San Francisco

$856United Airlines

Wed, Sep 30 - Wed, Oct 7

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

17h 35m1 stop Chicago O'Hare Intl

6:45 am - 6:01 pmATH Athens Eleftherios V.-ONT Ontario

21h 16m2 stops Frankfurt am Main San Francisco

$859United Airlines

Mon, Sep 28 - Tue, Nov 17

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

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

18h 59m1 stop Dallas/Fort Worth

$1,004British Airways

Fri, Aug 21 - Fri, Sep 4

7:05 am - 9:15 amONT Ontario-ATH Athens Eleftherios V.

16h 10m1 stop Atlanta Hartsfield-Jackson

9:45 am - 6:30 pmATH Athens Eleftherios V.-ONT Ontario

18h 45m1 stop Atlanta Hartsfield-Jackson

$1,024Air France

Fri, Aug 21 - Sat, Sep 5

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

17h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 6:30 pmATH Athens Eleftherios V.-ONT Ontario

18h 45m1 stop Atlanta Hartsfield-Jackson

$1,055KLM

Fri, Aug 21 - Sat, Sep 5

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

17h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 6:30 pmATH Athens Eleftherios V.-ONT Ontario

18h 45m1 stop Atlanta Hartsfield-Jackson

$1,058Delta

Fri, Aug 21 - Sat, Sep 5

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

$1,064British Airways

Fri, Aug 21 - Sun, Sep 6

7:05 am - 9:20 amONT Ontario-ATH Athens Eleftherios V.

16h 15m1 stop Atlanta Hartsfield-Jackson

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

20h 39m1 stop Atlanta Hartsfield-Jackson

$1,163Air France

Sat, Aug 22 - Tue, Sep 8

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

17h 35m1 stop Chicago O'Hare Intl

12:10 pm - 8:01 pmATH Athens Eleftherios V.-ONT Ontario

41h 51m2 stops Montreal Pierre Elliott Trudeau Intl San Francisco

$1,213United Airlines

Wed, Aug 19 - Fri, Aug 28

5:00 am - 10:10 amONT Ontario-ATH Athens Eleftherios V.

19h 10m2 stops Denver Intl Montreal Pierre Elliott Trudeau Intl

3:25 pm - 12:50 pmATH Athens Eleftherios V.-ONT Ontario

31h 25m2 stops Montreal Pierre Elliott Trudeau Intl Denver Intl

$1,216Multiple Airlines

Wed, Aug 19 - Fri, Aug 28

5:00 am - 10:35 amONT Ontario-ATH Athens Eleftherios V.

19h 35m2 stops Denver Intl Chicago O'Hare Intl

12:10 pm - 3:41 pmATH Athens Eleftherios V.-ONT Ontario

37h 31m2 stops Montreal Pierre Elliott Trudeau Intl San Francisco

$1,217United Airlines

Wed, Aug 19 - Fri, Aug 28

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

17h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 6:30 pmATH Athens Eleftherios V.-ONT Ontario

18h 45m1 stop Atlanta Hartsfield-Jackson

$1,233Delta

Wed, Aug 19 - Fri, Aug 28

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Delta flights from Ontario to Athens

Our best Delta deals on Ontario to Athens flight tickets

Delta

Nov 22

ONT6:00 amOntario

45h 40m

2 stops

ATH1:40 pmAthens Eleftherios V.

Nov 27

ATH6:10 amAthens Eleftherios V.

25h 58m

2 stops

ONT10:08 pmOntario

$830

Delta

Oct 4

ONT10:00 pmOntario

25h 20m

1 stop

ATH9:20 amAthens Eleftherios V.

Oct 14

ATH6:00 amAthens Eleftherios V.

26h 43m

2 stops

ONT10:43 pmOntario

$848

Delta

Sep 23

ONT11:54 amOntario

25h 06m

2 stops

ATH11:00 pmAthens Eleftherios V.

Sep 29

ATH6:00 amAthens Eleftherios V.

21h 19m

2 stops

ONT5:19 pmOntario

$852

American Airlines flights from Ontario to Athens

Our best American Airlines deals on Ontario to Athens flight tickets

American Airlines

Oct 9

ONT10:10 pmOntario

27h 20m

1 stop

ATH11:30 amAthens Eleftherios V.

Oct 21

ATH1:00 pmAthens Eleftherios V.

19h 59m

1 stop

ONT10:59 pmOntario

$911

American Airlines

Oct 9

ONT10:10 pmOntario

27h 20m

1 stop

ATH11:30 amAthens Eleftherios V.

Oct 21

ATH1:00 pmAthens Eleftherios V.

20h 52m

2 stops

ONT11:52 pmOntario

$915

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 11/11

6:00 am-10:05 am

2 stops18h 05m

Athens Eleftherios V.

Wed 11/25

1:00 pm-3:59 pm

2 stops36h 59m

$810

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 12/28

6:00 am-1:30 am

2 stops33h 30m

Athens Eleftherios V.

Fri 1/8

1:00 pm-6:44 pm

2 stops39h 44m

$817

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 11/18

6:00 am-10:05 am

2 stops18h 05m

Athens Eleftherios V.

Wed 12/2

6:40 am-5:47 pm

2 stops21h 07m

$829

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 11/22

6:00 am-1:40 pm

2 stops45h 40m

Athens Eleftherios V.

Fri 11/27

6:10 am-10:08 pm

2 stops25h 58m

$830

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 12/28

6:00 am-1:30 am

2 stops33h 30m

Athens Eleftherios V.

Thu 1/7

12:55 pm-11:06 pm

2 stops20h 11m

$837

Quickest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 1/13

12:00 pm-4:30 pm

2 stops18h 30m

Athens Eleftherios V.

Wed 1/27

6:10 am-4:12 pm

2 stops20h 02m

$839

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

6:00 am-10:43 pm

2 stops26h 43m

$848

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 9/23

11:54 am-11:00 pm

2 stops25h 06m

Athens Eleftherios V.

Tue 9/29

6:00 am-5:19 pm

2 stops21h 19m

$852

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 9/30

8:03 am-11:05 pm

2 stops29h 02m

Athens Eleftherios V.

Wed 10/7

6:00 am-10:51 pm

2 stops26h 51m

$856

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 9/28

7:00 am-10:35 am

1 stop17h 35m

Athens Eleftherios V.

Tue 11/17

6:45 am-6:01 pm

2 stops21h 16m

$859

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 $495. 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 $737. 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 $495. 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 46% 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

Fastest flight time	16h 15m
Direct flights	None

The fastest flight from Ontario to Athens takes 16h 15m

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 15m.
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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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.