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Otopeni Intl

$412+ 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 1/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — OTP
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$504
(Iberia)

One-way from

$412
(United Airlines)

Popular in

December

Cheapest in

October

Average price

$580
Provider with most accurate pricing for Ontario-Bucharest Otopeni Intl flight deals.
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Provider most trusted by Cheapflights users for Ontario-Bucharest Otopeni Intl flights.
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From Ontario to Bucharest Otopeni Intl
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One-way flight from Ontario to Bucharest Otopeni Intl
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Highest demand for flights based on searches. 7% potential increase in price ($54 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 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 October 28, 2025.

This United Airlines deal was found by Cheapflights users on 10/26. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/265:05 amONT - OTP
2 stops22h 55mUnited Airlines
Wed 12/106:05 amOTP - ONT
2 stops24h 37mUnited Airlines
Deal found 10/26$511
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/171:29 pmONT - OTP
2 stops19h 06mUnited Airlines
Fri 12/55:55 amOTP - ONT
2 stops26h 54mUnited Airlines
Deal found 10/27$597
This Iberia deal was found by Cheapflights users on 10/27. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1910:47 amONT - OTP
2 stops18h 58mMultiple Airlines
Fri 12/58:00 amOTP - ONT
2 stops24h 28mMultiple Airlines
Deal found 10/27$603
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/197:00 amONT - OTP
2 stops21h 00mUnited Airlines
Fri 12/55:55 amOTP - ONT
2 stops24h 47mUnited Airlines
Deal found 10/27$610
This United Airlines deal was found by Cheapflights users on 10/26. 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 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
Wed 11/192:40 pmOTP - ONT
2 stops18h 11mUnited Airlines
Deal found 10/26$637
This Iberia deal was found by Cheapflights users on 10/27. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2710:57 amONT - OTP
2 stops19h 33mMultiple Airlines
Fri 11/148:00 amOTP - ONT
2 stops24h 29mMultiple Airlines
Deal found 10/27$643
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/281:33 pmONT - OTP
2 stops19h 52mUnited Airlines
Fri 11/142:50 pmOTP - ONT
2 stops18h 01mUnited Airlines
Deal found 10/27$650
This United Airlines deal was found by Cheapflights users on 10/27. 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 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 11/142:50 pmOTP - ONT
2 stops18h 01mUnited Airlines
Deal found 10/27$713
This Iberia deal was found by Cheapflights users on 10/26. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2610:47 amONT - OTP
2 stops18h 58mMultiple Airlines
Wed 12/108:05 amOTP - ONT
2 stops24h 23mMultiple Airlines
Deal found 10/26$739
This United Airlines deal was found by Cheapflights users on 10/26. 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 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
Thu 12/185:50 amOTP - ONT
2 stops40h 48mUnited Airlines
Deal found 10/26$786
This Iberia deal was found by Cheapflights users on 10/26. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/87:00 amONT - OTP
2 stops30h 00mMultiple Airlines
Fri 12/198:00 amOTP - ONT
2 stops25h 46mMultiple Airlines
Deal found 10/26$901
This Iberia deal was found by Cheapflights users on 10/27. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1710:47 amONT - OTP
2 stops18h 43mMultiple Airlines
Mon 12/18:05 amOTP - ONT
2 stops24h 18mMultiple Airlines
Deal found 10/27$918

Cheapflights Fare Finder

 
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 October 28, 2025.
Use the filters below to find and compare flights from Ontario to Bucharest Otopeni Intl Airport that are best for you.

Fly from

Ontario

Fly to

Otopeni Intl

Route

Depart

Return

Price

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 2/25

4:59 pm-8:00 pm

2 stops17h 01m

Bucharest Otopeni Intl

Wed 3/11

8:05 am-9:40 pm

2 stops22h 35m

$504

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 11/26

5:05 am-2:00 pm

2 stops22h 55m

Bucharest Otopeni Intl

Wed 12/10

6:05 am-8:42 pm

2 stops24h 37m

$511

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 1/29

10:58 am-7:30 pm

2 stops22h 32m

Bucharest Otopeni Intl

Thu 2/12

8:00 am-11:58 pm

2 stops25h 58m

$529

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 1/25

6:00 am-2:05 pm

2 stops22h 05m

Bucharest Otopeni Intl

Sun 2/8

5:55 am-9:58 pm

2 stops26h 03m

$537

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 1/26

6:00 am-2:05 pm

2 stops22h 05m

Bucharest Otopeni Intl

Mon 2/9

2:50 pm-10:53 pm

2 stops18h 03m

$537

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 3/30

4:15 pm-1:00 am

2 stops22h 45m

Bucharest Otopeni Intl

Mon 4/13

6:00 am-6:00 pm

2 stops22h 00m

$550

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sat 1/24

6:00 am-2:05 pm

2 stops22h 05m

Bucharest Otopeni Intl

Sat 2/7

2:50 pm-10:53 pm

2 stops18h 03m

$561

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 2/24

7:10 am-2:45 pm

2 stops21h 35m

Bucharest Otopeni Intl

Tue 3/10

8:00 am-10:02 pm

2 stops23h 02m

$579

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 1/28

10:58 am-8:00 pm

2 stops23h 02m

Bucharest Otopeni Intl

Wed 2/11

8:05 am-10:48 pm

2 stops24h 43m

$579

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 11/17

1:29 pm-6:35 pm

2 stops19h 06m

Bucharest Otopeni Intl

Fri 12/5

5:55 am-10:49 pm

3 stops26h 54m

$597

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 18 results
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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 October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Bucharest Otopeni Intl Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Bucharest Otopeni Intl Airport

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

Currently, September is the cheapest month in which you can book a flight from Ontario to Bucharest Otopeni Intl Airport (average of $441). Flying from Ontario to Bucharest Otopeni Intl Airport 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 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 October 28, 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 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 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.

  • How long is the flight from Ontario to Bucharest Otopeni Intl Airport?

    For as low as $504, British Airways can have you in Bucharest Otopeni Intl Airport from Ontario in 17h 01m. The distance between Ontario and Bucharest Otopeni Intl Airport is about 6541 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    $412 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on British Airways and American Airlines, with prices starting from $549 and $3,456, respectively.

  • 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, September is the cheapest month in which you can book a flight from Ontario to Bucharest Otopeni Intl Airport (average of $441). Flying from Ontario to Bucharest Otopeni Intl Airport 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 Otopeni Intl Airport?

Book flights to Bucharest Otopeni Intl Airport if you plan to visit one of these locations
Otopeni

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