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

United Airlines, KLM, and Delta 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.

$370 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.

5:45 am - 11:00 amONT Ontario-ATH Athens Eleftherios V.

19h 15m2 stops Houston George Bush Intcntl Toronto Pearson Intl

6:45 am - 5:47 pmATH Athens Eleftherios V.-ONT Ontario

21h 02m2 stops Frankfurt am Main San Francisco

$838United Airlines

Wed, Dec 9 - Wed, Feb 3

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

$845KLM

Wed, Feb 24 - Wed, Mar 10

11:20 am - 4:30 pmONT Ontario-ATH Athens Eleftherios V.

19h 10m2 stops San Francisco Frankfurt am Main

7:05 am - 8:20 pmATH Athens Eleftherios V.-ONT Ontario

23h 15m3 stops Zurich Newark Denver Intl

$857United Airlines

Tue, Jan 26 - Tue, Feb 9

5:00 am - 11:00 amONT Ontario-ATH Athens Eleftherios V.

44h 00m3 stops Denver Intl New York LaGuardia Montreal Pierre Elliott Trudeau Intl

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

39h 44m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$859United Airlines

Thu, Nov 26 - Thu, Dec 10

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

17h 35m1 stop Chicago O'Hare Intl

6:45 am - 5:36 pmATH Athens Eleftherios V.-ONT Ontario

20h 51m2 stops Frankfurt am Main San Francisco

$861United Airlines

Tue, Oct 20 - Tue, Dec 1

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

18h 00m2 stops Chicago O'Hare Intl Toronto Pearson Intl

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

39h 44m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$864United Airlines

Thu, Nov 26 - Thu, Dec 10

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

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

6:45 am - 5:36 pmATH Athens Eleftherios V.-ONT Ontario

20h 51m2 stops Frankfurt am Main San Francisco

$866United Airlines

Tue, Oct 20 - Tue, Dec 1

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

18h 05m2 stops Houston George Bush Intcntl Newark

7:05 am - 8:15 pmATH Athens Eleftherios V.-ONT Ontario

23h 10m2 stops Zurich San Francisco

$880United Airlines

Wed, Nov 11 - Wed, Nov 18

6:27 pm - 11:00 amONT Ontario-ATH Athens Eleftherios V.

54h 33m2 stops San Francisco Toronto Pearson Intl

1:00 pm - 8:20 pmATH Athens Eleftherios V.-ONT Ontario

41h 20m2 stops Montreal Pierre Elliott Trudeau Intl Denver Intl

$893United Airlines

Thu, Dec 24 - 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

$895KLM

Fri, Jan 22 - Fri, Feb 5

Cheap last minute flights

Enter your travel dates to find the best prices.

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

26h 00m1 stop Atlanta Hartsfield-Jackson

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

18h 22m1 stop Atlanta Hartsfield-Jackson

$954Delta

Sun, Aug 30 - Thu, Sep 17

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

26h 00m1 stop Atlanta Hartsfield-Jackson

6:00 am - 4:35 pmATH Athens Eleftherios V.-ONT Ontario

20h 35m2 stops Amsterdam Schiphol Salt Lake City

$959Delta

Sun, Aug 30 - Wed, Sep 16

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

17h 55m1 stop Atlanta Hartsfield-Jackson

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

18h 22m1 stop Atlanta Hartsfield-Jackson

$974Delta

Tue, Sep 1 - Thu, Sep 17

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

17h 55m1 stop Atlanta Hartsfield-Jackson

6:00 am - 4:35 pmATH Athens Eleftherios V.-ONT Ontario

20h 35m2 stops Amsterdam Schiphol Salt Lake City

$979Delta

Tue, Sep 1 - Wed, Sep 9

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

$1,064Air France

Sat, Aug 29 - Sat, Sep 5

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

17h 35m1 stop Chicago O'Hare Intl

6:25 am - 8:01 pmATH Athens Eleftherios V.-ONT Ontario

23h 36m2 stops Frankfurt am Main San Francisco

$1,068United Airlines

Sat, Aug 29 - Sat, Sep 5

2:27 pm - 2:10 amONT Ontario-ATH Athens Eleftherios V.

25h 43m2 stops Dallas/Fort Worth London Heathrow

4:20 pm - 8:07 pmATH Athens Eleftherios V.-ONT Ontario

37h 47m2 stops London Heathrow Dallas/Fort Worth

$1,190British Airways

Mon, Aug 31 - Thu, Sep 10

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

$1,198British Airways

Sun, Aug 30 - Tue, Sep 1

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

18h 40m1 stop Dallas/Fort Worth

10:00 pm - 8:07 pmATH Athens Eleftherios V.-ONT Ontario

32h 07m2 stops Madrid Barajas Dallas/Fort Worth

$1,210Iberia

Sun, Aug 30 - Thu, Sep 10

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

17h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 8:05 pmATH Athens Eleftherios V.-ONT Ontario

20h 20m1 stop Atlanta Hartsfield-Jackson

$1,215KLM

Mon, Aug 31 - Thu, Sep 10

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United Airlines flights from Ontario to Athens

Our best United Airlines deals on Ontario to Athens flight tickets

United Airlines

Dec 9

ONT5:45 amOntario

19h 15m

2 stops

ATH11:00 amAthens Eleftherios V.

Feb 3

ATH6:45 amAthens Eleftherios V.

21h 02m

2 stops

ONT5:47 pmOntario

$838

United Airlines

Jan 26

ONT11:20 amOntario

19h 10m

2 stops

ATH4:30 pmAthens Eleftherios V.

Feb 9

ATH7:05 amAthens Eleftherios V.

23h 15m

3 stops

ONT8:20 pmOntario

$857

United Airlines

Nov 26

ONT5:00 amOntario

44h 00m

3 stops

ATH11:00 amAthens Eleftherios V.

Dec 10

ATH1:00 pmAthens Eleftherios V.

39h 44m

2 stops

ONT6:44 pmOntario

$859

KLM flights from Ontario to Athens

Our best KLM deals on Ontario to Athens flight tickets

KLM

Feb 24

ONT12:00 pmOntario

18h 30m

2 stops

ATH4:30 pmAthens Eleftherios V.

Mar 10

ATH6:10 amAthens Eleftherios V.

20h 02m

2 stops

ONT4:12 pmOntario

$845

KLM

Jan 22

ONT12:00 pmOntario

18h 30m

2 stops

ATH4:30 pmAthens Eleftherios V.

Feb 5

ATH6:10 amAthens Eleftherios V.

20h 02m

2 stops

ONT4:12 pmOntario

$895

KLM

Jan 26

ONT12:00 pmOntario

18h 30m

2 stops

ATH4:30 pmAthens Eleftherios V.

Feb 9

ATH6:10 amAthens Eleftherios V.

20h 02m

2 stops

ONT4:12 pmOntario

$978

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 12/9

5:45 am-11:00 am

2 stops19h 15m

Athens Eleftherios V.

Wed 2/3

6:45 am-5:47 pm

2 stops21h 02m

$838

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 2/24

12:00 pm-4:30 pm

2 stops18h 30m

Athens Eleftherios V.

Wed 3/10

6:10 am-4:12 pm

2 stops20h 02m

$845

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 1/26

11:20 am-4:30 pm

2 stops19h 10m

Athens Eleftherios V.

Tue 2/9

7:05 am-8:20 pm

3 stops23h 15m

$857

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Thu 11/26

5:00 am-11:00 am

3 stops44h 00m

Athens Eleftherios V.

Thu 12/10

1:00 pm-6:44 pm

2 stops39h 44m

$859

Quickest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 10/20

7:00 am-10:35 am

1 stop17h 35m

Athens Eleftherios V.

Tue 12/1

6:45 am-5:36 pm

2 stops20h 51m

$861

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Thu 11/26

7:00 am-11:00 am

2 stops18h 00m

Athens Eleftherios V.

Thu 12/10

1:00 pm-6:44 pm

2 stops39h 44m

$864

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 10/20

5:00 am-10:35 am

2 stops19h 35m

Athens Eleftherios V.

Tue 12/1

6:45 am-5:36 pm

2 stops20h 51m

$866

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 11/18

7:05 am-8:15 pm

2 stops23h 10m

$880

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Thu 12/24

6:27 pm-11:00 am

2 stops54h 33m

Athens Eleftherios V.

Thu 1/7

1:00 pm-8:20 pm

2 stops41h 20m

$893

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Fri 1/22

12:00 pm-4:30 pm

2 stops18h 30m

Athens Eleftherios V.

Fri 2/5

6:10 am-4:12 pm

2 stops20h 02m

$895

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 $515. 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 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

Best Price Found	$370
Fastest flight time	17h 55m
Direct flights	None

The best one-way flight to Athens from Ontario in the past 72 hours is $370. The best round-trip flight deal from Ontario to Athens found on momondo in the last 72 hours is $838.

The fastest flight from Ontario to Athens takes 17h 55m

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 55m.
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.