HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Otopeni Intl

$501+ Cheap flights from Ontario (ONT) to Otopeni Intl (OTP)

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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — OTP
Mar 19 — Mar 261
Wed 3/19
Wed 3/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Otopeni Intl 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 Otopeni Intl

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Otopeni Intl (OTP). 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 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$552
(Delta)

One-way from

$501
(United Airlines)

Popular in

June

Cheapest in

March

Average price

$584
Provider with most accurate pricing for Ontario-Bucharest Otopeni Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Bucharest Otopeni Intl flights.
Search Deals
From Ontario to Bucharest Otopeni Intl
Search Deals
One-way flight from Ontario to Bucharest Otopeni Intl
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($119 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

Find flight deals from Ontario to Otopeni Intl

Cheapest flights from Ontario to Otopeni Intl
Explore the most affordable flight options available from Ontario to Otopeni Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 14, 2025.

This Delta deal was found by Cheapflights users on 3/13. 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 3/315:40 amONT - OTP
2 stops25h 40mDelta
Tue 4/86:30 amOTP - ONT
2 stops38h 32mDelta
Deal found 3/13$552
This United Airlines deal was found by Cheapflights users on 3/13. 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 4/13:55 pmONT - OTP
2 stops23h 00mUnited Airlines
Wed 4/96:00 amOTP - ONT
2 stops24h 21mUnited Airlines
Deal found 3/13$569
This British Airways deal was found by Cheapflights users on 3/13. 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 3/2510:57 amONT - OTP
2 stops18h 48mBritish Airways
Thu 4/38:25 amOTP - ONT
2 stops20h 08mBritish Airways
Deal found 3/13$693
This American Airlines deal was found by Cheapflights users on 3/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/12:54 pmONT - OTP
2 stops24h 31mAmerican Airlines
Thu 4/108:25 amOTP - ONT
2 stops19h 55mAmerican Airlines
Deal found 3/13$747
This Air Serbia deal was found by Cheapflights users on 3/13. 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 5/510:40 pmONT - OTP
2 stops42h 25mAir Serbia
Mon 5/194:40 amOTP - ONT
2 stops26h 42mAir Serbia
Deal found 3/13$1,078
This United deal was found by Cheapflights users on 3/11. 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.
Wed 8/67:00 amONT - OTP
2 stops30h 30mMultiple Airlines
Fri 8/156:00 amOTP - ONT
2 stops21h 43mMultiple Airlines
Deal found 3/11$1,296

Find flights from Ontario to Otopeni Intl within your budget

Customize your flight search to find flights from Ontario to Otopeni Intl 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 14, 2025.

Fly from

Ontario

Fly to

Otopeni Intl

Route

Depart

Return

Price

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 3/31

5:40 am-5:20 pm

2 stops25h 40m

Bucharest Otopeni Intl

Tue 4/8

6:30 am-11:02 am

2 stops38h 32m

$552

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 4/1

3:55 pm-12:55 am

2 stops23h 00m

Bucharest Otopeni Intl

Wed 4/9

6:00 am-8:21 pm

2 stops24h 21m

$569

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 3/25

10:57 am-2:45 pm

2 stops18h 48m

Bucharest Otopeni Intl

Thu 4/3

8:25 am-6:33 pm

2 stops20h 08m

$693

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 4/1

2:54 pm-1:25 am

2 stops24h 31m

Bucharest Otopeni Intl

Sat 4/12

8:25 am-9:58 pm

2 stops23h 33m

$747

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 5/5

10:40 pm-3:05 am

2 stops42h 25m

Bucharest Otopeni Intl

Mon 5/19

4:40 am-9:22 pm

2 stops26h 42m

$1,078

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 8/6

7:00 am-11:30 pm

2 stops30h 30m

Bucharest Otopeni Intl

Fri 8/15

6:00 am-5:43 pm

2 stops21h 43m

$1,296

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 3/18

6:00 am-3:45 pm

3 stops24h 45m

$501

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sat 4/12

7:00 am-2:00 pm

2 stops21h 00m

$8,076

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Compare providers for flights from Ontario to Otopeni Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Otopeni Intl in March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Bucharest Otopeni Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Bucharest Otopeni Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Bucharest Otopeni Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Bucharest Otopeni Intl Airport 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 Otopeni Intl Airport 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 Otopeni Intl

Have a flexible travel schedule? Discover the best time to fly to Otopeni Intl 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.

Travel insights for flights from Ontario to Otopeni Intl

Get recent, data-driven insights about flights from Ontario to Otopeni Intl including ideal travel times, pricing trends, and more.

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

Currently, November is the cheapest month in which you can book a flight from Ontario to Bucharest Otopeni Intl Airport (average of $604). Flying from Ontario to Bucharest Otopeni Intl Airport 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 OTP?

Find hourly flight availability from Ontario to Otopeni Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 14, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to Bucharest Otopeni Intl Airport in the morning. If you’re flexible enough to do this you can expect to save up to 38% on your trip compared to booking a flight at noon.

Rainfall in Otopeni Intl by month

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

In terms of precipitation, rainfall in Bucharest Otopeni Intl Airport 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 Otopeni Intl Airport when rainfall is around 0.8 in.

Temperature in Otopeni Intl by month

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

If weather is an important factor for your trip to Bucharest Otopeni Intl Airport, 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 Otopeni Intl

Get insights into the airlines that provide service to Otopeni Intl. 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 Otopeni Intl. Reviews last updated March 14, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines and American Airlines from Ontario to Bucharest to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,944 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

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
7,944 reviews
Delta
8.0
Very good
7,944 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

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
8,623 reviews
Delta
8.0
Very good
7,944 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

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
7,944 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

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
6,713 reviews
Delta
8.0
Very good
7,944 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

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
192 reviews
Delta
8.0
Very good
7,944 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

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 Otopeni Intl. 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 Otopeni Intl?

    If you book a flight to Bucharest Otopeni Intl from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario. There are 0 flights from Ontario to Bucharest Otopeni Intl per day from 0 different airlines.

  • What are the cheapest airlines flying from Ontario to Bucharest Otopeni Intl Airport round-trip?

    Our cheapest airline available from Ontario to Bucharest Otopeni Intl Airport is Delta. Our recent data shows that you can find tickets from as low as $552 on this airline. Additional options worth looking into are United Airlines and British Airways, starting at $569 and $693 round-trip.

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

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

  • How can I find direct flights from Ontario to Otopeni Intl?

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

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

    Yes. Cheapflights offers flight deals from Ontario to Otopeni Intl 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 Otopeni Intl Airport?

    Currently, November is the cheapest month in which you can book a flight from Ontario to Bucharest Otopeni Intl Airport (average of $604). Flying from Ontario to Bucharest Otopeni Intl Airport 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.
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.