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$411+ 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BUH
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$526
(United Airlines)

One-way from

$411
(Delta)

Popular in

December

Cheapest in

October

Average price

$806
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. 8% potential increase in price ($69 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This United Airlines deal was found by Cheapflights users on 7/3. 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 12/3010:40 amONT - OTP
2 stops17h 15mUnited Airlines
Tue 1/135:55 amOTP - ONT
2 stops25h 26mUnited Airlines
Deal found 7/3$526
This British Airways deal was found by Cheapflights users on 7/2. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/28:15 amONT - OTP
2 stops19h 45mBritish Airways
Sat 8/168:25 amOTP - ONT
2 stops19h 59mBritish Airways
Deal found 7/2$660
This Delta deal was found by Cheapflights users on 7/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/227:05 amONT - OTP
2 stops19h 05mDelta
Wed 7/307:00 amOTP - ONT
2 stops19h 29mDelta
Deal found 7/2$794
This Air Serbia deal was found by Cheapflights users on 7/1. 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 Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2910:56 pmONT - OTP
2 stops31h 29mAir Serbia
Mon 10/134:05 pmOTP - ONT
2 stops39h 24mAir Serbia
Deal found 7/1$1,150

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 July 3, 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

Tue 12/30

10:40 am-1:55 pm

2 stops17h 15m

Bucharest Otopeni Intl

Tue 1/13

5:55 am-9:21 pm

2 stops25h 26m

$526

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sat 8/2

8:15 am-2:00 pm

2 stops19h 45m

Bucharest Otopeni Intl

Sat 8/16

8:25 am-6:24 pm

2 stops19h 59m

$660

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 7/22

7:05 am-12:10 pm

2 stops19h 05m

Bucharest Otopeni Intl

Wed 7/30

7:00 am-4:29 pm

2 stops19h 29m

$794

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 9/29

10:56 pm-4:25 pm

2 stops31h 29m

Bucharest Otopeni Intl

Mon 10/13

4:05 pm-9:29 pm

2 stops39h 24m

$1,150

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 8/12

7:05 am-12:10 pm

2 stops19h 05m

$411

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 8/25

6:50 pm-1:00 am

2 stops20h 10m

$414

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Fri 8/29

4:54 pm-11:50 pm

2 stops20h 56m

$967

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 7/9

12:00 pm-3:20 pm

3 stops41h 20m

$1,124

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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, November is the cheapest month in which you can book a flight from Ontario to Bucharest (average of $604). Flying from Ontario to Bucharest in June is currently the most expensive (average of $1,134). 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 July 3, 2025.

When flying from Ontario to Bucharest, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Bucharest

Get insights into the airlines that provide service to Bucharest. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bucharest. Reviews last updated July 3, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines from Ontario to Bucharest by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,861 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.6
Okay
7,093 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Serbia
6.3
Okay
197 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines to fly from Ontario to Bucharest one-way?

    One-way options have recently been found by users for as low as $411 on Delta. Other airlines that offer cheap prices include United Airlines from $414 and American Airlines from $967 one-way.

  • 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, November is the cheapest month in which you can book a flight from Ontario to Bucharest (average of $604). Flying from Ontario to Bucharest in June is currently the most expensive (average of $1,134). 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 Ontario?

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

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