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$461+ 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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BUH
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
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Cheap 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 October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$504
(Orbitz)

One-way from

$461
(United Airlines)

Popular in

December

Cheapest in

October

Average price

$580
Provider with most accurate pricing for Ontario-Bucharest (BUH) flight deals.
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Provider most trusted by Cheapflights users for Ontario-Bucharest (BUH) flights.
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From Ontario to Bucharest (BUH)
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One-way flight from Ontario to Bucharest (BUH)
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Highest demand for flights based on searches. 7% potential increase in price ($57 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 16, 2025.

This United Airlines deal was found by Cheapflights users on 10/15. 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 11/121:33 pmONT - OTP
2 stops19h 07mUnited Airlines
Tue 11/252:50 pmOTP - ONT
2 stops18h 01mUnited Airlines
Deal found 10/15$511
This United Airlines deal was found by Cheapflights users on 10/16. 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 11/131:29 pmONT - OTP
2 stops19h 11mUnited Airlines
Tue 11/252:50 pmOTP - ONT
2 stops18h 01mUnited Airlines
Deal found 10/16$536
This United Airlines deal was found by Cheapflights users on 10/16. 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 11/131:29 pmONT - OTP
2 stops19h 11mUnited Airlines
Thu 11/202:45 pmOTP - ONT
2 stops18h 06mUnited Airlines
Deal found 10/16$561
This United Airlines deal was found by Cheapflights users on 10/16. 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 11/65:05 amONT - OTP
2 stops23h 00mUnited Airlines
Thu 11/205:50 amOTP - ONT
2 stops21h 44mUnited Airlines
Deal found 10/16$630
This KLM deal was found by Cheapflights users on 10/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1112:16 pmONT - OTP
2 stops17h 34mMultiple Airlines
Mon 11/246:00 amOTP - ONT
2 stops20h 09mMultiple Airlines
Deal found 10/16$652
This British Airways deal was found by Cheapflights users on 10/15. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/94:47 pmONT - OTP
2 stops20h 08mBritish Airways
Sat 12/204:00 pmOTP - ONT
2 stops41h 46mBritish Airways
Deal found 10/15$804
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Tue 12/91:50 pmONT - OTP
2 stops24h 05mUnited Airlines
Sat 12/202:50 pmOTP - ONT
2 stops41h 02mUnited Airlines
Deal found 10/15$805
This United Airlines deal was found by Cheapflights users on 10/16. 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 11/41:33 pmONT - OTP
2 stops18h 52mUnited Airlines
Thu 11/135:50 amOTP - ONT
2 stops21h 44mUnited Airlines
Deal found 10/16$811
This Delta deal was found by Cheapflights users on 10/15. 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.
Sat 11/224:49 pmONT - OTP
2 stops44h 01mDelta
Sun 12/71:55 pmOTP - ONT
2 stops39h 44mDelta
Deal found 10/15$820
This United Airlines deal was found by Cheapflights users on 10/16. 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 12/81:34 pmONT - OTP
2 stops19h 01mUnited Airlines
Mon 12/225:55 amOTP - ONT
2 stops25h 12mUnited Airlines
Deal found 10/16$861
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Sat 10/186:00 amONT - OTP
2 stops31h 30mUnited Airlines
Fri 10/241:55 pmOTP - ONT
2 stops40h 29mUnited Airlines
Deal found 10/15$941

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 October 16, 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 11/12

1:33 pm-6:40 pm

2 stops19h 07m

Bucharest Otopeni Intl

Wed 11/26

2:40 pm-10:51 pm

2 stops18h 11m

$511

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 11/13

1:29 pm-6:40 pm

2 stops19h 11m

Bucharest Otopeni Intl

Tue 11/25

2:50 pm-10:51 pm

2 stops18h 01m

$536

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 11/13

1:29 pm-6:40 pm

2 stops19h 11m

Bucharest Otopeni Intl

Fri 11/21

2:50 pm-10:51 pm

2 stops18h 01m

$536

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sat 1/17

6:00 am-2:05 pm

2 stops22h 05m

Bucharest Otopeni Intl

Sat 1/31

2:50 pm-10:53 pm

2 stops18h 03m

$560

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sat 1/10

1:20 pm-11:50 pm

2 stops24h 30m

Bucharest Otopeni Intl

Sat 1/31

5:55 am-8:58 pm

2 stops25h 03m

$560

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 2/16

6:00 am-2:05 pm

2 stops22h 05m

Bucharest Otopeni Intl

Mon 3/2

2:50 pm-10:57 pm

2 stops18h 07m

$561

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 11/13

1:29 pm-6:40 pm

2 stops19h 11m

Bucharest Otopeni Intl

Thu 11/20

2:45 pm-10:51 pm

2 stops18h 06m

$561

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 11/6

5:05 am-2:05 pm

2 stops23h 00m

Bucharest Otopeni Intl

Thu 11/20

5:50 am-5:34 pm

2 stops21h 44m

$630

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 11/11

12:16 pm-3:50 pm

2 stops17h 34m

Bucharest Otopeni Intl

Mon 11/24

6:00 am-4:09 pm

2 stops20h 09m

$652

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 12/9

4:47 pm-10:55 pm

2 stops20h 08m

Bucharest Otopeni Intl

Sat 12/20

4:00 pm-11:46 pm

2 stops41h 46m

$804

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

Showing 1-10 of 15 results
1
2
  • 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 October 16, 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 19h 07m. Fly via United Airlines 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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