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$532+ Cheap flights from Ontario (ONT) to Serbia

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BEG
Dec 31 — Jan 71
Wed 12/31
Wed 1/7
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 December 1, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$523
(Delta)

Popular in

June

Cheapest in

February

Average price

$967
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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Highest demand for flights based on searches. 20% potential increase in price ($221 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 December 1, 2025.

This Delta deal was found by Cheapflights users on 11/29. 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.
Sat 12/2710:29 pmONT - BEG
2 stops39h 56mDelta
Sat 1/176:05 amBEG - ONT
2 stops25h 46mDelta
Deal found 11/29$838
This Delta deal was found by Cheapflights users on 12/1. 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.
Tue 12/2310:29 pmONT - BEG
2 stops28h 26mDelta
Sat 1/176:05 amBEG - ONT
2 stops25h 46mDelta
Deal found 12/1$882
This United Airlines deal was found by Cheapflights users on 11/30. 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 12/2611:59 pmONT - BEG
2 stops27h 56mUnited Airlines
Sat 1/171:50 pmBEG - ONT
2 stops36h 53mUnited Airlines
Deal found 11/30$943
This Delta deal was found by Cheapflights users on 12/1. 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.
Sun 12/286:00 amONT - BEG
2 stops32h 25mDelta
Sat 1/176:05 amBEG - ONT
2 stops25h 46mDelta
Deal found 12/1$972
This United Airlines deal was found by Cheapflights users on 11/29. 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 12/3111:59 pmONT - BEG
2 stops27h 51mUnited Airlines
Wed 1/146:15 amBEG - ONT
2 stops20h 28mUnited Airlines
Deal found 11/29$1,008
This Delta deal was found by Cheapflights users on 12/1. 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 12/256:38 amONT - BEG
2 stops31h 47mDelta
Sat 1/176:05 amBEG - ONT
2 stops25h 46mDelta
Deal found 12/1$1,073
This United Airlines deal was found by Cheapflights users on 11/29. 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 12/2511:59 pmONT - BEG
2 stops27h 56mUnited Airlines
Sat 1/171:50 pmBEG - ONT
2 stops42h 03mUnited Airlines
Deal found 11/29$1,363
This Delta deal was found by Cheapflights users on 11/29. 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 12/37:05 amONT - BEG
2 stops19h 50mDelta
Sat 1/176:05 amBEG - ONT
2 stops24h 00mDelta
Deal found 11/29$1,792
This United Airlines deal was found by Cheapflights users on 11/29. 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 12/36:00 amONT - BEG
3 stops21h 50mUnited Airlines
Sat 1/171:50 pmBEG - ONT
2 stops41h 08mUnited Airlines
Deal found 11/29$1,829
This United Airlines deal was found by Cheapflights users on 11/29. 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.
Mon 12/221:40 pmONT - BEG
2 stops38h 25mUnited Airlines
Mon 1/51:50 pmBEG - ONT
2 stops41h 09mUnited Airlines
Deal found 11/29$1,898

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 December 1, 2025.
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

Sun 1/25

10:30 pm-11:55 am

2 stops28h 25m

Belgrade Nikola Tesla

Wed 2/11

6:05 am-9:05 pm

2 stops24h 00m

$532

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Wed 1/28

12:41 pm-11:25 pm

2 stops25h 44m

Belgrade Nikola Tesla

Wed 2/11

6:05 am-9:05 pm

2 stops24h 00m

$532

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Mon 1/26

10:30 pm-11:55 am

2 stops28h 25m

Belgrade Nikola Tesla

Wed 2/11

6:05 am-9:05 pm

2 stops24h 00m

$532

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Thu 2/19

6:00 am-11:55 am

2 stops44h 55m

Belgrade Nikola Tesla

Mon 2/23

12:35 pm-10:37 pm

2 stops43h 02m

$547

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Wed 1/28

6:00 am-12:50 pm

2 stops21h 50m

Belgrade Nikola Tesla

Fri 2/13

1:50 pm-10:57 pm

2 stops18h 07m

$550

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Wed 4/15

5:10 am-12:45 pm

2 stops22h 35m

Belgrade Nikola Tesla

Thu 4/30

1:50 pm-11:06 pm

2 stops18h 16m

$550

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Mon 1/26

6:00 am-12:50 pm

2 stops21h 50m

Belgrade Nikola Tesla

Tue 2/10

6:10 am-5:43 pm

2 stops20h 33m

$550

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Wed 1/28

6:00 am-12:50 pm

2 stops21h 50m

Belgrade Nikola Tesla

Thu 2/12

6:25 am-10:57 pm

2 stops25h 32m

$550

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Mon 1/26

6:00 am-12:50 pm

2 stops21h 50m

Belgrade Nikola Tesla

Fri 2/13

1:50 pm-10:57 pm

2 stops18h 07m

$550

OntarioBelgrade

ONT - BEG

ONTBEG

Ontario

Wed 12/17

6:00 am-12:50 pm

2 stops45h 50m

$1,316

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/29

Showing 1-10 of 11 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 $515). Flying from Ontario to Serbia in June is currently the most expensive (average of $886). 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 28h 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 $515). Flying from Ontario to Serbia in June is currently the most expensive (average of $886). 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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