$463 Cheap Flights from Ontario (ONT) to Belgrade (BEG)

View $463 flight on Wed, Oct 8, 2025Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Nikola Tesla Airport (BEG)

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Cheap Flights from Ontario to Belgrade (ONT-BEG)

Prices were available within the past 7 days and start at $463 for one-way flights and $704 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Dec 10 - Wed, Dec 17
ONT
Ontario
BEG
Belgrade
$704 Roundtrip, found 1 day ago
$704
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Dec 10 from Ontario to Belgrade, returning Wed, Dec 17, priced at $704 found 1 day ago
United
Tue, Sep 2 - Tue, Sep 16
ONT
Ontario
BEG
Belgrade
$722 Roundtrip, found 10 hours ago
$722
Roundtrip
found 10 hours ago
Select United flight, departing Tue, Sep 2 from Ontario to Belgrade, returning Tue, Sep 16, priced at $722 found 10 hours ago
United
Tue, Sep 2 - Tue, Sep 16
ONT
Ontario
BEG
Belgrade
$725 Roundtrip, found 10 hours ago
$725
Roundtrip
found 10 hours ago
Select United flight, departing Tue, Sep 2 from Ontario to Belgrade, returning Tue, Sep 16, priced at $725 found 10 hours ago
United
Wed, Oct 8 - Mon, Oct 13
ONT
Ontario
BEG
Belgrade
$732 Roundtrip, found 3 days ago
$732
Roundtrip
found 3 days ago
Select United flight, departing Wed, Oct 8 from Ontario to Belgrade, returning Mon, Oct 13, priced at $732 found 3 days ago
United
Sun, Sep 14 - Thu, Nov 27
ONT
Ontario
BEG
Belgrade
$742 Roundtrip, found 1 day ago
$742
Roundtrip
found 1 day ago
Select United flight, departing Sun, Sep 14 from Ontario to Belgrade, returning Thu, Nov 27, priced at $742 found 1 day ago
United
Tue, Sep 30 - Fri, Oct 10
ONT
Ontario
BEG
Belgrade
$749 Roundtrip, found 5 days ago
$749
Roundtrip
found 5 days ago
Select United flight, departing Tue, Sep 30 from Ontario to Belgrade, returning Fri, Oct 10, priced at $749 found 5 days ago
United
Tue, Sep 30 - Fri, Oct 10
ONT
Ontario
BEG
Belgrade
$777 Roundtrip, found 2 days ago
$777
Roundtrip
found 2 days ago
Select United flight, departing Tue, Sep 30 from Ontario to Belgrade, returning Fri, Oct 10, priced at $777 found 2 days ago
KLM
Wed, Sep 3 - Thu, Sep 25
ONT
Ontario
BEG
Belgrade
$818 Roundtrip, found 2 days ago
$818
Roundtrip
found 2 days ago
Select KLM flight, departing Wed, Sep 3 from Ontario to Belgrade, returning Thu, Sep 25, priced at $818 found 2 days ago
Alaska Airlines
Tue, Sep 2 - Tue, Sep 16
ONT
Ontario
BEG
Belgrade
$893 Roundtrip, found 10 hours ago
$893
Roundtrip
found 10 hours ago
Select Alaska Airlines flight, departing Tue, Sep 2 from Ontario to Belgrade, returning Tue, Sep 16, priced at $893 found 10 hours ago
Air Serbia
Mon, Aug 18 - Wed, Aug 20
ONT
Ontario
BEG
Belgrade
$2,110 Roundtrip, found 5 hours ago
$2,110
Roundtrip
found 5 hours ago
Select Air Serbia flight, departing Mon, Aug 18 from Ontario to Belgrade, returning Wed, Aug 20, priced at $2,110 found 5 hours ago
Flights from Ontario (ONT) to Belgrade (BEG)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Nikola Tesla
Airlines serving
United
Roundtrip price
$703
Distance
6380 mi

Ontario to Belgrade Flights

The cheapest times to fly from Ontario to Belgrade

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ontario to Belgrade are during the month of December. You can find some of the cheapest flights from Ontario to Belgrade with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ontario to Belgrade

Sunday is one of the best days to book for cheap flights from Ontario to Belgrade: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Ontario to Belgrade

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ontario to Belgrade in 2025. You can also book with separate airlines for your outbound and return journeys, from $463 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ontario to Belgrade flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Ontario to Belgrade airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Nikola Tesla Airport (BEG) cost?
Secure a cheap one-way flight from $463 or cheap return flight from $704 from Los Angeles - Ontario Intl. Airport (ONT) to Nikola Tesla Airport (BEG) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Los Angeles - Ontario Intl. Airport (ONT) to Nikola Tesla Airport (BEG)?
The cheapest month to fly from ONT to BEG is December, when demand is low. Off-peak season is typically when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Los Angeles - Ontario Intl. Airport (ONT) to Nikola Tesla Airport (BEG)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest ONT to BEG flight.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Nikola Tesla Airport (BEG)?
You'll need to hop on a flight with a layover when traveling from Los Angeles - Ontario Intl. Airport (ONT) to Nikola Tesla Airport (BEG). There are no daily direct flights on this route. However, just filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from ONT to BEG?
Typically you'll have the most choice when it comes to flights on a Friday. Tuesdays tend to be the quietest.* But this can change based on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to Nikola Tesla Airport (BEG)?
To arrive at Nikola Tesla Airport (BEG) on schedule, pick a flight that leaves Los Angeles - Ontario Intl. Airport (ONT) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to Nikola Tesla Airport (BEG) last-minute?
Last-minute bookings from ONT to BEG are generally more expensive. To secure the lowest rates, start searching for flights well in advance. That being said, if you're flexible with your travel dates, you may find a cheap ticket right before your trip.
Is it cheaper to book an ONT to BEG flight and hotel package?
Compared with arranging flights and hotels separately, booking an ONT to BEG flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one easy place will take the stress out of travel planning. Just pick your flights and choose from our extensive range of hotels, then personalize your trip with other add-ons like activities and car rentals.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Nikola Tesla Airport (BEG)?
In most cases, you can cancel or reschedule your ONT to BEG flight. However, additional fees may apply, especially if you booked over 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you need more details, head to our Customer Service portal.

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*Available to One Key members.