HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Bucharest

$490+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BUH
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Bucharest with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$640
(United Airlines)

One-way from

$490
(United Airlines)

Popular in

June

Cheapest in

October

Average price

$624
Provider with most accurate pricing for Los Angeles-Bucharest (BUH) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-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. 13% potential increase in price ($114 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

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 March 28, 2025.

This United Airlines deal was found by Cheapflights users on 3/25. 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 7/291:34 pmONT - OTP
2 stops17h 16mUnited Airlines
Tue 10/76:00 amOTP - ONT
2 stops24h 17mUnited Airlines
Deal found 3/25$640
This Gurufare deal was found by Cheapflights users on 3/26. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1011:59 pmONT - OTP
2 stops38h 46mBritish Airways
Sat 5/178:05 pmOTP - ONT
2 stops35h 52mBritish Airways
Deal found 3/26$712
This Delta deal was found by Cheapflights users on 3/27. 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.
Mon 6/211:46 amONT - OTP
2 stops19h 34mDelta
Fri 8/297:00 amOTP - ONT
2 stops25h 29mDelta
Deal found 3/27$841
This United deal was found by Cheapflights users on 3/26. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/191:20 pmONT - OTP
2 stops49h 40mMultiple Airlines
Mon 5/56:00 amOTP - ONT
2 stops22h 01mMultiple Airlines
Deal found 3/26$988
This Air Serbia deal was found by Cheapflights users on 3/26. 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 9/2211:00 pmONT - OTP
2 stops30h 20mAir Serbia
Mon 10/64:05 pmOTP - ONT
2 stops39h 36mAir Serbia
Deal found 3/26$1,075

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 March 28, 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 7/29

1:34 pm-4:50 pm

2 stops17h 16m

Bucharest Otopeni Intl

Tue 10/7

6:00 am-8:17 pm

2 stops24h 17m

$640

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sat 5/10

11:59 pm-12:45 am

2 stops38h 46m

Bucharest Otopeni Intl

Sat 5/17

8:05 pm-9:57 pm

2 stops35h 52m

$712

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 6/2

11:46 am-5:20 pm

2 stops19h 34m

Bucharest Otopeni Intl

Fri 8/29

7:00 am-10:29 pm

2 stops25h 29m

$841

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sat 4/19

1:20 pm-1:00 am

2 stops49h 40m

Bucharest Otopeni Intl

Mon 5/5

6:00 am-6:01 pm

2 stops22h 01m

$988

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 9/22

11:00 pm-3:20 pm

2 stops30h 20m

Bucharest Otopeni Intl

Mon 10/6

4:05 pm-9:41 pm

2 stops39h 36m

$1,075

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 5/4

1:20 pm-6:35 pm

2 stops19h 15m

$490

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 6/8

11:49 am-5:20 pm

2 stops19h 31m

$628

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sat 6/14

4:50 pm-12:30 am

2 stops21h 40m

$746

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 6/12

12:55 pm-1:25 am

2 stops26h 30m

$756

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 5/25

10:59 pm-4:25 pm

2 stops31h 26m

$2,895

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

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 $1,175). 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 March 28, 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.

Rainfall in Bucharest by month

Plan your trip to Bucharest by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Bucharest ranges from 0.8 - 3.1 inches per month. June is typically the wettest month, when rainfall can reach 3.1 in. October is typically the driest time to visit Bucharest when rainfall is around 0.8 in.

Temperature in Bucharest by month

Plan your trip to Bucharest by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Bucharest, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 March 28, 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. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,897 reviews

Comfort

8.0

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

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
7,897 reviews
Delta
8.0
Very good
7,897 reviews

Comfort

8.0

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

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
8,603 reviews
Delta
8.0
Very good
7,897 reviews

Comfort

8.0

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

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
7,897 reviews

Comfort

8.0

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

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
6,712 reviews
Delta
8.0
Very good
7,897 reviews

Comfort

8.0

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

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
194 reviews
Delta
8.0
Very good
7,897 reviews

Comfort

8.0

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

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 $490 on United Airlines. Other airlines that offer cheap prices include Delta from $628 and British Airways from $746 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 $1,175). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Bucharest

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Otopeni Intl flights
San Francisco to Otopeni Intl flights
Ontario to Otopeni Intl flights
Las Vegas to Otopeni Intl flights
Los Angeles to Cluj Napoca flights
San Francisco to Cluj Napoca flights
San Diego to Otopeni Intl flights
Los Angeles to Timisoara flights
Sacramento to Otopeni Intl flights
Ontario to Cluj Napoca flights
San Francisco to Timisoara flights
Sacramento to Cluj Napoca flights
San Jose to Otopeni Intl flights
Santa Ana to Otopeni Intl flights
San Francisco to Sibiu flights
Sacramento to Sibiu flights
Sacramento to Timisoara flights
Los Angeles to Sibiu flights
San Francisco to Iaşi flights
Oakland to Otopeni Intl flights
Los Angeles to Iaşi flights
Reno to Cluj Napoca flights
San Jose to Cluj Napoca flights
San Jose to Sibiu flights
Santa Ana to Cluj Napoca flights
Santa Rosa to Cluj Napoca flights
San Francisco to Satu Mare flights
San Jose to Iaşi flights
Burbank to Cluj Napoca flights
Burbank to Otopeni Intl flights
Long Beach to Otopeni Intl flights
Monterey to Otopeni Intl flights
Oakland to Bacău flights
Oakland to Cluj Napoca flights
Oakland to Iaşi flights
San Francisco to Suceava flights
San Diego to Timisoara flights
San Francisco to Bacău flights
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.