What is the cheapest airline that flies from Ontario to Southeast Europe?

United Airlines, KLM, and Lufthansa are the most popular carriers operating from Ontario to Southeast Europe

What airlines fly to Southeast Europe?

Lufthansa, Turkish Airlines and United Airlines are the top three most popular airlines that fly to Southeast Europe from Ontario according to our data. Lufthansa is the first choice among our users, with 31% of people opting to fly with this airline when traveling to Southeast Europe. Keep in mind that there are 21 different airlines that fly to Southeast Europe 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 Southeast Europe?

Prices for flights from Ontario Airport to Southeast Europe were last updated today.

How many operators does momondo search for flights from Ontario Airport to Southeast Europe?

The number of operators available for flights from Ontario Airport to Southeast Europe is 2 as of May 2026.

How old do you have to be to fly from Ontario Airport to Southeast Europe?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to Southeast Europe.

What documentation or ID do you need to fly to Southeast Europe?

The required travel and health documents for your Southeast Europe 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 Southeast Europe. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$335 Cheap Flights from Ontario to Southeast Europe in 2026

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Find the cheapest flights from Ontario to Southeast Europe

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:18 pm - 6:35 pm

ONT

OTP

19h 17m

2 stops

1:45 pm - 10:59 pm

OTP

ONT

19h 14m

2 stops

$722United Airlines

Wed, Jul 29 - Thu, Aug 20

4:47 pm - 10:55 pm

ONT

OTP

20h 08m

2 stops

8:00 am - 10:00 pm

OTP

ONT

24h 00m

2 stops

$724British Airways

Tue, Nov 10 - Tue, Dec 8

5:00 am - 4:20 pm

ONT

OTP

25h 20m

2 stops

1:45 pm - 12:50 pm

OTP

ONT

57h 05m

2 stops

$745United Airlines

Tue, Jul 28 - Wed, Aug 19

12:00 pm - 8:10 pm

ONT

OTP

22h 10m

2 stops

6:00 am - 4:12 pm

OTP

ONT

20h 12m

2 stops

$769Multiple Airlines

Sun, Nov 1 - Sat, Nov 14

9:55 am - 10:50 pm

ONT

OTP

26h 55m

2 stops

6:00 am - 11:48 pm

OTP

ONT

27h 48m

2 stops

$770Delta

Sun, Nov 1 - Sat, Nov 14

10:25 am - 3:25 pm

ONT

OTP

19h 00m

2 stops

8:15 am - 6:57 pm

OTP

ONT

20h 42m

2 stops

$784Multiple Airlines

Tue, Sep 15 - Tue, Sep 29

1:18 pm - 10:10 am

ONT

ATH

34h 52m

2 stops

12:10 pm - 8:01 pm

ATH

ONT

41h 51m

2 stops

$803Air Canada

Sat, Aug 29 - Tue, Sep 8

7:00 am - 11:00 am

ONT

ATH

18h 00m

1 stop

9:45 am - 9:56 pm

ATH

ONT

22h 11m

1 stop

$814Delta

Sun, Sep 6 - Wed, Sep 16

7:05 am - 11:00 am

ONT

ATH

17h 55m

1 stop

9:45 am - 6:01 pm

ATH

ONT

18h 16m

1 stop

$820KLM

Wed, Aug 19 - Wed, Sep 2

6:20 am - 11:20 am

ONT

LJU

20h 00m

2 stops

6:00 am - 6:23 pm

LJU

ONT

21h 23m

2 stops

$1,053KLM

Mon, Jul 6 - Wed, Jul 22

Air Canada flights from Ontario to Southeast Europe

Our best Air Canada deals on Ontario to Southeast Europe flight tickets

Air Canada

Aug 29

ONT1:18 pmOntario

34h 52m

2 stops

ATH10:10 amAthens Eleftherios V.

Sep 8

ATH12:10 pmAthens Eleftherios V.

41h 51m

2 stops

ONT8:01 pmOntario

$803

Air Canada

Sep 26

ONT1:49 pmOntario

37h 51m

2 stops

ATH1:40 pmAthens Eleftherios V.

Oct 13

ATH12:10 pmAthens Eleftherios V.

34h 31m

2 stops

ONT12:41 pmOntario

$836

Air Canada

Sep 27

ONT5:00 amOntario

19h 10m

2 stops

ATH10:10 amAthens Eleftherios V.

Oct 12

ATH12:10 pmAthens Eleftherios V.

42h 42m

2 stops

ONT8:52 pmOntario

$891

British Airways flights from Ontario to Southeast Europe

Our best British Airways deals on Ontario to Southeast Europe flight tickets

British Airways

Nov 10

ONT4:47 pmOntario

20h 08m

2 stops

OTP10:55 pmBucharest Otopeni Intl

Dec 8

OTP8:00 amBucharest Otopeni Intl

24h 00m

2 stops

ONT10:00 pmOntario

$724

British Airways

Aug 19

ONT12:33 pmOntario

20h 27m

2 stops

ATH7:00 pmAthens Eleftherios V.

Sep 2

ATH2:00 pmAthens Eleftherios V.

18h 58m

1 stop

ONT10:58 pmOntario

$856

British Airways

Aug 24

ONT10:29 amOntario

21h 06m

2 stops

ATH5:35 pmAthens Eleftherios V.

Sep 4

ATH2:00 pmAthens Eleftherios V.

38h 58m

1 stop

ONT6:58 pmOntario

$900

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 7/29

1:18 pm-6:35 pm

2 stops19h 17m

Bucharest Otopeni Intl

Thu 8/20

1:45 pm-10:59 pm

2 stops19h 14m

$722

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 11/10

4:47 pm-10:55 pm

2 stops20h 08m

Bucharest Otopeni Intl

Tue 12/8

8:00 am-10:00 pm

2 stops24h 00m

$724

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 7/28

5:00 am-4:20 pm

2 stops25h 20m

Bucharest Otopeni Intl

Wed 8/19

1:45 pm-12:50 pm

2 stops57h 05m

$745

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 11/1

12:00 pm-8:10 pm

2 stops22h 10m

Bucharest Otopeni Intl

Sat 11/14

6:00 am-4:12 pm

2 stops20h 12m

$769

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 11/1

9:55 am-10:50 pm

2 stops26h 55m

Bucharest Otopeni Intl

Sat 11/14

6:00 am-11:48 pm

2 stops27h 48m

$770

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 9/15

10:25 am-3:25 pm

2 stops19h 00m

Bucharest Otopeni Intl

Tue 9/29

8:15 am-6:57 pm

2 stops20h 42m

$784

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 8/29

1:18 pm-10:10 am

2 stops34h 52m

Athens Eleftherios V.

Tue 9/8

12:10 pm-8:01 pm

2 stops41h 51m

$803

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 9/6

7:00 am-11:00 am

1 stop18h 00m

Athens Eleftherios V.

Wed 9/16

9:45 am-9:56 pm

1 stop22h 11m

$814

Quickest round-trip

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 8/19

7:05 am-11:00 am

1 stop17h 55m

Athens Eleftherios V.

Wed 9/2

9:45 am-6:01 pm

1 stop18h 16m

$820

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

Mon 7/6

6:20 am-11:20 am

2 stops20h 00m

Ljubljana Joze Pucnik

Wed 7/22

6:00 am-6:23 pm

2 stops21h 23m

$1,053

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 Southeast Europe

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 month to fly to Southeast Europe?

The month of December is, on average, the cheapest month to fly to Southeast Europe from Ontario, with most prices found around $0. If you aren’t able to travel during the month of December, then book flights to Southeast Europe from Ontario during January instead. Flights to Southeast Europe in January, while not as cheap as those in December, still average around $0.

Can stopping save me money on Ontario to Southeast Europe flights?

No. A direct flight is the cheapest option for a flight between Ontario to Southeast Europe.

Cheap Ontario to Southeast Europe flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Southeast Europe

Fastest flight time	15h 57m
Direct flights	None

The fastest flight from Ontario to Southeast Europe takes 15h 57m

There are no direct flights from Ontario to Southeast Europe. There are no popular flight routes from Ontario to Southeast Europe.

Search flight deals

Frequently asked questions about flying from Ontario to Southeast Europe

When did momondo last update prices for flights from Ontario Airport to Southeast Europe?
Prices for flights from Ontario Airport to Southeast Europe were last updated today.
How many operators does momondo search for flights from Ontario Airport to Southeast Europe?
The number of operators available for flights from Ontario Airport to Southeast Europe is 2 as of May 2026.
How old do you have to be to fly from Ontario Airport to Southeast Europe?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to Southeast Europe.
What documentation or ID do you need to fly to Southeast Europe?
The required travel and health documents for your Southeast Europe 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 Southeast Europe. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Ontario to Southeast Europe?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Ontario to Southeast Europe is Airbus A321neo (13.71% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (12.98%), Airbus A320neo (11.77%), and Airbus A321-100/200 (11.77%).

Best airlines flying from Ontario to Southeast Europe

Compare and see reviews for airlines that fly from Ontario to Southeast Europe with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $539	Free Cancellation	Rating 7.4 9,751 reviews		Search United Airlines flights
Delta	PriceFrom $803	Free Cancellation	Rating 7.9 8,449 reviews		Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Southeast Europe?

It is quick and easy to find Ontario to Southeast Europe 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 Southeast Europe that suits you.

Can I find flights from Ontario to Southeast Europe with flexible booking policies on momondo?

All flight searches from Ontario to Southeast Europe on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to Southeast Europe?

momondo helps you find the best flight between Ontario and Southeast Europe by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Ontario to Southeast Europe right now. Can momondo alert me if prices change?

Price alerts on flights to Southeast Europe 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.