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$412+ 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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BUH
Dec 5 — Dec 121
Fri 12/5
Fri 12/12
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 November 5, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$499
(United Airlines)

One-way from

$412
(United Airlines)

Popular in

December

Cheapest in

October

Average price

$639
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 ($53 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 5, 2025.

This United Airlines deal was found by Cheapflights users on 11/5. 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 - OTP
2 stops22h 00mUnited Airlines
Wed 12/106:05 amOTP - ONT
2 stops24h 37mUnited Airlines
Deal found 11/5$510
This United Airlines deal was found by Cheapflights users on 11/3. 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 12/17:00 amONT - OTP
2 stops21h 05mUnited Airlines
Tue 12/95:55 amOTP - ONT
2 stops24h 47mUnited Airlines
Deal found 11/3$511
This United Airlines deal was found by Cheapflights users on 11/5. 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
Mon 1/122:50 pmOTP - ONT
2 stops18h 03mUnited Airlines
Deal found 11/5$522
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Thu 12/41:50 pmONT - OTP
2 stops24h 00mUnited Airlines
Thu 12/115:50 amOTP - ONT
2 stops21h 47mUnited Airlines
Deal found 11/4$535
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Mon 11/241:29 pmONT - OTP
2 stops19h 06mUnited Airlines
Thu 12/115:50 amOTP - ONT
2 stops26h 59mUnited Airlines
Deal found 11/4$597
This Delta deal was found by Cheapflights users on 11/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/267:05 amONT - OTP
2 stops19h 55mDelta
Fri 12/56:00 amOTP - ONT
2 stops27h 58mDelta
Deal found 11/3$604
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Tue 11/251:29 pmONT - OTP
2 stops24h 26mUnited Airlines
Tue 12/95:55 amOTP - ONT
2 stops24h 47mUnited Airlines
Deal found 11/4$609
This United Airlines deal was found by Cheapflights users on 11/3. 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 11/241:29 pmONT - OTP
2 stops19h 11mUnited Airlines
Fri 12/55:55 amOTP - ONT
2 stops21h 42mUnited Airlines
Deal found 11/3$610
This United Airlines deal was found by Cheapflights users on 11/5. 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 11/275:05 amONT - OTP
2 stops23h 00mUnited Airlines
Thu 12/115:50 amOTP - ONT
2 stops21h 47mUnited Airlines
Deal found 11/5$630
This United Airlines deal was found by Cheapflights users on 11/4. 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 11/71:29 pmONT - OTP
2 stops19h 06mUnited Airlines
Fri 11/215:55 amOTP - ONT
2 stops26h 36mUnited Airlines
Deal found 11/4$636
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Tue 11/111:33 pmONT - OTP
2 stops18h 52mUnited Airlines
Thu 11/275:50 amOTP - ONT
2 stops19h 31mUnited Airlines
Deal found 11/4$639
This United Airlines deal was found by Cheapflights users on 11/5. 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 11/111:33 pmONT - OTP
2 stops18h 52mUnited Airlines
Tue 11/255:55 amOTP - ONT
2 stops21h 39mUnited Airlines
Deal found 11/5$641

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 November 5, 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

Mon 4/13

4:15 pm-6:35 pm

2 stops16h 20m

Bucharest Otopeni Intl

Wed 5/6

1:50 pm-11:06 pm

2 stops19h 16m

$499

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 4/12

4:15 pm-6:35 pm

2 stops16h 20m

Bucharest Otopeni Intl

Fri 5/8

1:50 pm-11:06 pm

2 stops19h 16m

$499

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 4/12

4:15 pm-6:35 pm

2 stops16h 20m

Bucharest Otopeni Intl

Wed 5/6

1:50 pm-11:06 pm

2 stops19h 16m

$499

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 4/13

4:15 pm-6:35 pm

2 stops16h 20m

Bucharest Otopeni Intl

Fri 5/8

1:50 pm-11:06 pm

2 stops19h 16m

$499

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 4/14

1:00 pm-6:35 pm

2 stops19h 35m

Bucharest Otopeni Intl

Tue 5/5

1:50 pm-11:06 pm

2 stops19h 16m

$499

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 4/21

1:00 pm-6:35 pm

2 stops19h 35m

Bucharest Otopeni Intl

Thu 4/30

5:55 am-5:47 pm

2 stops21h 52m

$500

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 4/13

7:00 am-1:05 pm

2 stops20h 05m

Bucharest Otopeni Intl

Wed 5/6

1:50 pm-11:44 pm

2 stops19h 54m

$505

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 12/1

7:00 am-2:05 pm

2 stops21h 05m

Bucharest Otopeni Intl

Wed 12/10

6:05 am-10:49 pm

2 stops26h 44m

$511

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 1/7

1:24 pm-11:55 pm

2 stops24h 31m

Bucharest Otopeni Intl

Tue 2/17

5:55 am-8:50 pm

2 stops24h 55m

$512

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 1/7

1:24 pm-11:55 pm

2 stops24h 31m

Bucharest Otopeni Intl

Wed 2/18

6:05 am-10:57 pm

2 stops26h 52m

$512

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/3

Showing 1-10 of 21 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 $686). 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 November 5, 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 16h 20m. 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 $686). 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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