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

British Airways, KLM, and Delta are the most popular carriers operating from Ontario to Athens Eleftherios V.

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 18 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.

$319 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.

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

26h 30m2 stops Denver Intl Munich Franz Josef Strauss

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

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

$813United Airlines

Sun, Dec 6 - Thu, Dec 10

3:09 pm - 11:10 pmONT Ontario-ATH Athens Eleftherios V.

22h 01m2 stops Dallas/Fort Worth London Heathrow

7:50 am - 10:01 pmATH Athens Eleftherios V.-ONT Ontario

24h 11m2 stops London Heathrow Phoenix Sky Harbor Intl

$818British Airways

Mon, Feb 1 - Wed, Feb 10

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

44h 00m2 stops Denver Intl Toronto Pearson Intl

2:30 pm - 9:40 pmATH Athens Eleftherios V.-ONT Ontario

41h 10m2 stops Frankfurt am Main Houston George Bush Intcntl

$819Multiple Airlines

Sun, Nov 1 - Tue, Nov 10

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

18h 05m2 stops Houston George Bush Intcntl Newark

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

22h 02m2 stops Frankfurt am Main Chicago O'Hare Intl

$833United Airlines

Tue, Nov 10 - Tue, Nov 17

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

20h 37m2 stops San Francisco Munich Franz Josef Strauss

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

23h 35m2 stops Frankfurt am Main Denver Intl

$836United Airlines

Wed, Feb 3 - Thu, Feb 25

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

20h 37m2 stops San Francisco Munich Franz Josef Strauss

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

21h 02m2 stops Frankfurt am Main San Francisco

$836United Airlines

Wed, Feb 3 - Tue, Feb 23

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

20h 37m2 stops San Francisco Munich Franz Josef Strauss

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

23h 35m2 stops Frankfurt am Main Denver Intl

$836United Airlines

Wed, Feb 3 - Fri, Feb 26

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

20h 37m2 stops San Francisco Munich Franz Josef Strauss

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

21h 02m2 stops Frankfurt am Main San Francisco

$836United Airlines

Wed, Feb 3 - Wed, Feb 24

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

19h 00m2 stops Houston George Bush Intcntl Toronto Pearson Intl

6:45 am - 9:21 pmATH Athens Eleftherios V.-ONT Ontario

24h 36m2 stops Frankfurt am Main Houston George Bush Intcntl

$837United Airlines

Wed, Jan 6 - Wed, Jan 20

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

$838KLM

Wed, Feb 3 - Wed, Feb 17

Cheap last minute flights

Enter your travel dates to find the best prices.

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

17h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 7:53 pmATH Athens Eleftherios V.-ONT Ontario

20h 08m1 stop Atlanta Hartsfield-Jackson

$1,126KLM

Wed, Aug 12 - Wed, Aug 26

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

16h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 7:53 pmATH Athens Eleftherios V.-ONT Ontario

20h 08m1 stop Atlanta Hartsfield-Jackson

$1,126Delta

Wed, Aug 12 - Wed, Aug 26

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

17h 35m1 stop Chicago O'Hare Intl

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

20h 00m1 stop Chicago O'Hare Intl

$1,126United Airlines

Tue, Aug 11 - Tue, Aug 25

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

17h 35m1 stop Chicago O'Hare Intl

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

20h 00m1 stop Chicago O'Hare Intl

$1,126United Airlines

Wed, Aug 12 - Thu, Aug 27

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

17h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 7:53 pmATH Athens Eleftherios V.-ONT Ontario

20h 08m1 stop Atlanta Hartsfield-Jackson

$1,126Delta

Mon, Aug 10 - Wed, Aug 26

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

17h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 7:53 pmATH Athens Eleftherios V.-ONT Ontario

20h 08m1 stop Atlanta Hartsfield-Jackson

$1,126Delta

Tue, Aug 11 - Tue, Aug 25

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

17h 35m1 stop Chicago O'Hare Intl

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

20h 00m1 stop Chicago O'Hare Intl

$1,126United Airlines

Wed, Aug 12 - Tue, Aug 25

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

$1,126Delta

Tue, Aug 11 - Fri, Aug 28

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

16h 55m1 stop Atlanta Hartsfield-Jackson

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

18h 45m1 stop Atlanta Hartsfield-Jackson

$1,126Delta

Wed, Aug 12 - Fri, Aug 28

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

17h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 7:53 pmATH Athens Eleftherios V.-ONT Ontario

20h 08m1 stop Atlanta Hartsfield-Jackson

$1,126Delta

Tue, Aug 11 - Wed, Aug 26

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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 6

ONT1:00 pmOntario

26h 30m

2 stops

ATH1:30 amAthens Eleftherios V.

Dec 10

ATH1:00 pmAthens Eleftherios V.

39h 44m

2 stops

ONT6:44 pmOntario

$813

United Airlines

Nov 10

ONT6:00 amOntario

18h 05m

2 stops

ATH10:05 amAthens Eleftherios V.

Nov 17

ATH6:45 amAthens Eleftherios V.

22h 02m

2 stops

ONT6:47 pmOntario

$833

United Airlines

Feb 3

ONT6:53 pmOntario

20h 37m

2 stops

ATH1:30 amAthens Eleftherios V.

Feb 26

ATH6:45 amAthens Eleftherios V.

23h 35m

2 stops

ONT8:20 pmOntario

$836

Lufthansa flights from Ontario to Athens

Our best Lufthansa deals on Ontario to Athens flight tickets

Lufthansa

Aug 16

ONT7:00 amOntario

17h 35m

1 stop

ATH10:35 amAthens Eleftherios V.

Sep 1

ATH12:35 pmAthens Eleftherios V.

20h 00m

1 stop

ONT10:35 pmOntario

$951

Lufthansa

Aug 16

ONT7:00 amOntario

17h 35m

1 stop

ATH10:35 amAthens Eleftherios V.

Aug 23

ATH12:35 pmAthens Eleftherios V.

20h 00m

1 stop

ONT10:35 pmOntario

$1,231

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 12/6

1:00 pm-1:30 am

2 stops26h 30m

Athens Eleftherios V.

Thu 12/10

1:00 pm-6:44 pm

2 stops39h 44m

$813

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 2/1

3:09 pm-11:10 pm

2 stops22h 01m

Athens Eleftherios V.

Wed 2/10

7:50 am-10:01 pm

2 stops24h 11m

$818

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 11/1

5:00 am-11:00 am

2 stops44h 00m

Athens Eleftherios V.

Tue 11/10

2:30 pm-9:40 pm

2 stops41h 10m

$819

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 11/10

6:00 am-10:05 am

2 stops18h 05m

Athens Eleftherios V.

Tue 11/17

6:45 am-6:47 pm

2 stops22h 02m

$833

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 2/3

6:53 pm-1:30 am

2 stops20h 37m

Athens Eleftherios V.

Thu 2/25

6:45 am-8:20 pm

2 stops23h 35m

$836

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 2/3

6:53 pm-1:30 am

2 stops20h 37m

Athens Eleftherios V.

Tue 2/23

6:45 am-5:47 pm

2 stops21h 02m

$836

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 2/3

6:53 pm-1:30 am

2 stops20h 37m

Athens Eleftherios V.

Fri 2/26

6:45 am-8:20 pm

2 stops23h 35m

$836

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 2/3

6:53 pm-1:30 am

2 stops20h 37m

Athens Eleftherios V.

Wed 2/24

6:45 am-5:47 pm

2 stops21h 02m

$836

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 1/6

6:00 am-11:00 am

2 stops19h 00m

Athens Eleftherios V.

Wed 1/20

6:45 am-9:21 pm

2 stops24h 36m

$837

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

$838

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 Monday when prices can be found for as low as $481. 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 $685. 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 $489. 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 49% 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 55m
Direct flights	None

The fastest flight from Ontario to Athens takes 16h 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 16h 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.