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$438+ Cheap flights from Ontario (ONT) to Serbia

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BEG
Feb 14 — Feb 211
Sat 2/14
Sat 2/21
1 adult, Economy
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Cheap flight deals from Ontario to Serbia

Keep the following information in mind while searching for Ontario to Serbia flight deals. Data was last updated January 15, 2026.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$554
(United Airlines)

One-way from

$438
(United Airlines)

Popular in

June

Cheapest in

February

Average price

$724
Provider with most accurate pricing for Los Angeles-Belgrade Nikola Tesla flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Belgrade Nikola Tesla flights.
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From Ontario to Serbia
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One-way flight from Ontario to Serbia
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Highest demand for flights based on searches. 22% potential increase in price ($238 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from Ontario to Serbia

Cheapest flights from Ontario to Serbia
Explore the most affordable flight options available from Ontario to Serbia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 15, 2026.

This Delta deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/186:00 am
ONT
-
BEG
2 stops32h 25m
Delta
Fri 2/276:05 am
BEG
-
ONT
2 stops25h 32m
Delta
Deal found 1/15$534
This Delta deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/196:00 am
ONT
-
BEG
2 stops32h 25m
Delta
Thu 2/266:05 am
BEG
-
ONT
2 stops25h 32m
Delta
Deal found 1/15$549
This United Airlines deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:00 am
ONT
-
BEG
2 stops19h 50m
United Airlines
Wed 2/251:50 pm
BEG
-
ONT
2 stops18h 07m
United Airlines
Deal found 1/15$554
This United Airlines deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/151:50 pm
ONT
-
BEG
2 stops25h 00m
United Airlines
Sun 3/16:15 am
BEG
-
ONT
2 stops20h 26m
United Airlines
Deal found 1/14$569
This United Airlines deal was found by Cheapflights users on 1/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/51:50 pm
ONT
-
BEG
2 stops25h 00m
United Airlines
Thu 3/191:50 pm
BEG
-
ONT
2 stops35h 51m
United Airlines
Deal found 1/13$574
This United Airlines deal was found by Cheapflights users on 1/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/55:15 am
ONT
-
BEG
2 stops33h 35m
United Airlines
Mon 3/96:15 am
BEG
-
ONT
2 stops22h 35m
United Airlines
Deal found 1/12$584
This United Airlines deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/56:00 am
ONT
-
BEG
2 stops21h 50m
United Airlines
Thu 2/196:25 am
BEG
-
ONT
2 stops20h 16m
United Airlines
Deal found 1/14$604
This United Airlines deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/3011:05 am
ONT
-
BEG
2 stops19h 40m
United Airlines
Mon 5/44:55 pm
BEG
-
ONT
2 stops38h 57m
United Airlines
Deal found 1/14$625
This United Airlines deal was found by Cheapflights users on 1/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:00 am
ONT
-
BEG
2 stops20h 45m
United Airlines
Tue 9/296:20 am
BEG
-
ONT
2 stops20h 27m
United Airlines
Deal found 1/13$639
This United Airlines deal was found by Cheapflights users on 1/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/46:00 am
ONT
-
BEG
2 stops21h 50m
United Airlines
Wed 2/186:15 am
BEG
-
ONT
2 stops23h 35m
United Airlines
Deal found 1/13$644
This United Airlines deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/135:00 am
ONT
-
BEG
2 stops22h 55m
United Airlines
Fri 2/206:15 am
BEG
-
ONT
2 stops22h 52m
United Airlines
Deal found 1/15$669

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Serbia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 15, 2026.
Use the filters below to find and compare flights from Ontario to Serbia that are best for you.

Fly from

Ontario

Fly to

Serbia

Route

Depart

Return

Price

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Wed 2/18

6:00 am-11:25 pm

2 stops32h 25m

Belgrade Nikola Tesla

Fri 2/27

6:05 am-10:37 pm

2 stops25h 32m

$534

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Wed 2/18

6:00 am-11:25 pm

2 stops32h 25m

Belgrade Nikola Tesla

Thu 2/26

6:05 am-10:37 pm

2 stops25h 32m

$534

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Wed 2/18

6:00 am-11:25 pm

2 stops32h 25m

Belgrade Nikola Tesla

Tue 2/24

6:05 am-10:37 pm

2 stops25h 32m

$534

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Thu 2/19

6:00 am-11:25 pm

2 stops32h 25m

Belgrade Nikola Tesla

Fri 2/27

6:05 am-10:37 pm

2 stops25h 32m

$549

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Thu 2/19

6:00 am-11:25 pm

2 stops32h 25m

Belgrade Nikola Tesla

Tue 2/24

6:05 am-10:37 pm

2 stops25h 32m

$549

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Wed 2/18

8:00 am-12:50 pm

2 stops19h 50m

Belgrade Nikola Tesla

Wed 2/25

1:50 pm-10:57 pm

2 stops18h 07m

$554

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Sun 4/26

7:00 am-12:45 pm

2 stops20h 45m

Belgrade Nikola Tesla

Thu 5/7

6:10 am-9:01 pm

2 stops23h 51m

$554

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Fri 2/27

5:00 am-12:55 pm

2 stops22h 55m

Belgrade Nikola Tesla

Fri 3/6

6:15 am-10:18 pm

2 stops25h 03m

$569

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Sat 2/28

6:10 am-1:05 pm

2 stops21h 55m

Belgrade Nikola Tesla

Fri 3/13

6:15 am-8:50 pm

2 stops22h 35m

$569

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Thu 3/5

1:50 pm-11:50 pm

2 stops25h 00m

Belgrade Nikola Tesla

Thu 3/19

1:50 pm-5:41 pm

2 stops35h 51m

$574

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/13

Showing 1-10 of 21 results
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Best time to book a flight from Ontario to Serbia

Have a flexible travel schedule? Discover the best time to fly to Serbia from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Serbia

What is the cheapest month to book a flight from Ontario to Serbia?

Currently, December is the cheapest month in which you can book a flight from Ontario to Serbia (average of $484). Flying from Ontario to Serbia in June is currently the most expensive (average of $884). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Serbia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Serbia?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Serbia.

  • How long is the flight from Ontario to Serbia?

    Delta can get you from Ontario to Serbia in just under 32h 25m. Your travel time can differ by up to . Ontario and Serbia are separated by a distance of 6378 mi.

  • Can I find deals for flights from Ontario to Serbia that include hotel bookings?

    Yes. In addition to deals on Ontario to Serbia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Serbia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Serbia.

  • Can I find deals for business class flights from Ontario to Serbia?

    Yes. Cheapflights offers flight deals from Ontario to Serbia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Serbia?

    Currently, December is the cheapest month in which you can book a flight from Ontario to Serbia (average of $484). Flying from Ontario to Serbia in June is currently the most expensive (average of $884). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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