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$374+ Cheap flights from Ontario (ONT) to Bucharest (BUH)

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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BUH
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheap flight deals from Ontario to Bucharest

Cheapest flights from Ontario to Bucharest
Explore the most affordable flight options available from Ontario to Bucharest. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.

This United Airlines deal was found by Cheapflights users on 12/3. 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 12/291:40 pmONT - OTP
2 stops18h 55mUnited Airlines
Fri 1/302:50 pmOTP - ONT
2 stops18h 03mUnited Airlines
Deal found 12/3$498
This United Airlines deal was found by Cheapflights users on 12/3. 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.
Tue 12/3010:42 amONT - OTP
2 stops17h 13mUnited Airlines
Fri 1/302:50 pmOTP - ONT
2 stops18h 03mUnited Airlines
Deal found 12/3$511
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/2510:42 amONT - OTP
2 stops27h 08mUnited Airlines
Wed 3/46:05 amOTP - ONT
2 stops24h 45mUnited Airlines
Deal found 12/3$537
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/46:00 amONT - OTP
2 stops22h 05mUnited Airlines
Wed 12/106:05 amOTP - ONT
2 stops21h 32mUnited Airlines
Deal found 12/3$650
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/46:00 amONT - OTP
2 stops22h 05mUnited Airlines
Thu 12/115:50 amOTP - ONT
2 stops24h 52mUnited Airlines
Deal found 12/3$756
This United Airlines deal was found by Cheapflights users on 12/4. 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 12/2610:42 amONT - OTP
2 stops17h 28mUnited Airlines
Sun 1/182:50 pmOTP - ONT
2 stops18h 03mUnited Airlines
Deal found 12/4$786
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/2510:42 amONT - OTP
2 stops27h 08mUnited Airlines
Thu 1/85:50 amOTP - ONT
2 stops25h 08mUnited Airlines
Deal found 12/3$865
This United Airlines deal was found by Cheapflights users on 12/4. 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 12/2610:42 amONT - OTP
2 stops17h 28mUnited Airlines
Fri 1/95:55 amOTP - ONT
2 stops25h 03mUnited Airlines
Deal found 12/4$1,048
This Priceline deal was found by Cheapflights users on 12/3. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/64:47 pmONT - OTP
2 stops20h 58mBritish Airways
Mon 12/88:05 amOTP - ONT
2 stops24h 23mBritish Airways
Deal found 12/3$1,714
This United Airlines deal was found by Cheapflights users on 12/2. 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 12/2411:59 pmONT - OTP
2 stops52h 11mUnited Airlines
Sat 1/35:55 amOTP - ONT
2 stops40h 43mUnited Airlines
Deal found 12/2$2,012
This Priceline deal was found by Cheapflights users on 12/4. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/84:47 pmONT - OTP
2 stops20h 13mBritish Airways
Wed 12/108:05 amOTP - ONT
2 stops24h 23mBritish Airways
Deal found 12/4$2,028

Find flight deals from Ontario to Bucharest

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Bucharest (BUH). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 4, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$437
(oojo)

One-way from

$374
(oojo)

Popular in

December

Cheapest in

October

Average price

$1,022
Provider with most accurate pricing for Ontario-Bucharest (BUH) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Bucharest (BUH) flights.
Search Deals
From Ontario to Bucharest (BUH)
Search Deals
One-way flight from Ontario to Bucharest (BUH)
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($79 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Bucharest 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 4, 2025.
Use the filters below to find and compare flights from Ontario to Bucharest that are best for you.

Fly from

Ontario

Fly to

Bucharest

Route

Depart

Return

Price

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 4/1

10:56 am-12:25 am

2 stops27h 29m

Bucharest Otopeni Intl

Thu 4/30

8:25 am-9:56 pm

2 stops23h 31m

$437

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 1/20

4:45 pm-10:55 pm

2 stops20h 10m

Bucharest Otopeni Intl

Wed 2/4

8:05 am-10:48 pm

2 stops24h 43m

$446

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 1/18

10:58 am-2:55 pm

2 stops17h 57m

Bucharest Otopeni Intl

Tue 2/3

8:00 am-10:48 pm

2 stops24h 48m

$453

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 4/7

11:01 am-3:25 pm

2 stops18h 24m

Bucharest Otopeni Intl

Tue 4/21

8:25 am-9:56 pm

2 stops23h 31m

$462

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Fri 4/3

5:02 pm-11:50 pm

2 stops20h 48m

Bucharest Otopeni Intl

Fri 4/17

8:25 am-11:40 pm

2 stops25h 15m

$487

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 4/8

11:59 am-5:20 pm

2 stops19h 21m

Bucharest Otopeni Intl

Wed 4/15

6:00 am-10:40 pm

2 stops26h 40m

$497

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 12/29

1:40 pm-6:35 pm

2 stops18h 55m

Bucharest Otopeni Intl

Fri 1/30

2:50 pm-10:53 pm

2 stops18h 03m

$498

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 3/4

5:06 pm-3:45 pm

2 stops36h 39m

Bucharest Otopeni Intl

Wed 3/18

8:05 am-11:59 pm

2 stops24h 54m

$500

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 2/5

10:58 am-3:45 pm

2 stops18h 47m

Bucharest Otopeni Intl

Tue 2/10

8:00 am-10:48 pm

2 stops24h 48m

$503

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 12/30

10:42 am-1:55 pm

2 stops17h 13m

Bucharest Otopeni Intl

Fri 1/30

2:50 pm-10:53 pm

2 stops18h 03m

$511

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Showing 1-10 of 24 results
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2
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  • Most accurate provider: When it comes to deals on Ontario-Bucharest flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Bucharest flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Bucharest flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Bucharest flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Bucharest flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Bucharest

Have a flexible travel schedule? Discover the best time to fly to Bucharest 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 Bucharest

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

Currently, September is the cheapest month in which you can book a flight from Ontario to Bucharest (average of $441). Flying from Ontario to Bucharest in June is currently the most expensive (average of $685). 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.

What is the cheapest time of day to fly from ONT to BUH?

Find hourly flight availability from Ontario to Bucharest. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 4, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to Bucharest in the evening. If you’re flexible enough to do this you can expect to save up to 39% on your trip compared to booking a flight in the afternoon.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Bucharest. 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 Bucharest?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Bucharest. 0 airlines have flights from Ontario to Bucharest on a regular basis. Booking flights from Ontario to Bucharest should not be difficult; the airport handles an average of 0 outbound flights to Bucharest per day.

  • How long is the flight from Ontario to Bucharest?

    There are many flights that can get you from Ontario to Bucharest in 27h 29m. Fly via British Airways to get the fastest option. Airlines will cover a distance of 6541 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Bucharest 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 Bucharest?

    Currently, September is the cheapest month in which you can book a flight from Ontario to Bucharest (average of $441). Flying from Ontario to Bucharest in June is currently the most expensive (average of $685). 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

Traveling to a place near Bucharest?

Book flights to Bucharest if you plan to visit one of these locations
Otopeni

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