HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Otopeni Intl

$381+ 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — OTP
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
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 November 13, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$463
(Iberia)

One-way from

$381
(Orbitz)

Popular in

December

Cheapest in

October

Average price

$639
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. 10% potential increase in price ($83 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 13, 2025.

This Iberia deal was found by Cheapflights users on 11/13. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1010:47 amONT - OTP
2 stops18h 58mMultiple Airlines
Wed 2/118:05 amOTP - ONT
2 stops24h 43mMultiple Airlines
Deal found 11/13$602
This United Airlines deal was found by Cheapflights users on 11/13. 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 12/21:34 pmONT - OTP
2 stops24h 21mUnited Airlines
Fri 1/165:55 amOTP - ONT
2 stops26h 03mUnited Airlines
Deal found 11/13$611
This Iberia deal was found by Cheapflights users on 11/13. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/410:47 amONT - OTP
2 stops18h 58mMultiple Airlines
Thu 12/118:00 amOTP - ONT
2 stops24h 19mMultiple Airlines
Deal found 11/13$623
This United Airlines deal was found by Cheapflights users on 11/13. 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.
Mon 12/81:34 pmONT - OTP
2 stops19h 01mUnited Airlines
Sun 3/12:50 pmOTP - ONT
2 stops18h 07mUnited Airlines
Deal found 11/13$668
This United Airlines deal was found by Cheapflights users on 11/12. 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.
Sat 11/156:38 pmONT - OTP
2 stops37h 47mUnited Airlines
Fri 11/285:55 amOTP - ONT
2 stops26h 36mUnited Airlines
Deal found 11/12$741
This United Airlines deal was found by Cheapflights users on 11/12. 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.
Sat 11/156:38 pmONT - OTP
2 stops57h 27mUnited Airlines
Thu 11/275:50 amOTP - ONT
2 stops40h 47mUnited Airlines
Deal found 11/12$751
This British Airways deal was found by Cheapflights users on 11/13. 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.
Fri 11/143:08 pmONT - OTP
2 stops22h 17mBritish Airways
Fri 11/218:00 amOTP - ONT
2 stops21h 23mBritish Airways
Deal found 11/13$778
This United Airlines deal was found by Cheapflights users on 11/12. 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 12/101:34 pmONT - OTP
2 stops24h 21mUnited Airlines
Wed 12/176:05 amOTP - ONT
2 stops24h 37mUnited Airlines
Deal found 11/12$790
This United Airlines deal was found by Cheapflights users on 11/12. 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.
Sun 12/2110:42 amONT - OTP
2 stops21h 43mUnited Airlines
Mon 1/55:55 amOTP - ONT
2 stops21h 48mUnited Airlines
Deal found 11/12$830
This United Airlines deal was found by Cheapflights users on 11/12. 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 12/51:34 pmONT - OTP
2 stops19h 01mUnited Airlines
Mon 1/122:50 pmOTP - ONT
2 stops18h 03mUnited Airlines
Deal found 11/12$847
This Iberia deal was found by Cheapflights users on 11/13. 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 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 11/13$853
This British Airways deal was found by Cheapflights users on 11/11. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1510:47 amONT - OTP
2 stops18h 18mBritish Airways
Mon 12/14:00 pmOTP - ONT
2 stops40h 39mBritish Airways
Deal found 11/11$862

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 November 13, 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

Fri 1/16

10:58 am-3:10 pm

2 stops18h 12m

Bucharest Otopeni Intl

Wed 3/11

8:05 am-10:02 pm

2 stops22h 57m

$508

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 1/7

1:24 pm-11:55 pm

2 stops24h 31m

Bucharest Otopeni Intl

Wed 1/21

6:05 am-8:58 pm

2 stops24h 53m

$511

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 2/12

1:45 pm-11:50 pm

2 stops24h 05m

Bucharest Otopeni Intl

Thu 2/26

5:50 am-8:50 pm

2 stops25h 00m

$536

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 1/14

6:00 am-2:00 pm

2 stops22h 00m

Bucharest Otopeni Intl

Sat 1/31

2:50 pm-10:53 pm

2 stops18h 03m

$536

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sat 2/14

1:53 pm-2:05 pm

2 stops38h 12m

Bucharest Otopeni Intl

Sat 2/28

5:55 am-9:59 pm

2 stops26h 04m

$537

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 4/16

11:00 am-6:35 pm

2 stops21h 35m

Bucharest Otopeni Intl

Thu 4/30

1:50 pm-11:06 pm

2 stops19h 16m

$549

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 4/13

11:00 am-6:35 pm

2 stops21h 35m

Bucharest Otopeni Intl

Mon 4/27

1:50 pm-11:06 pm

2 stops19h 16m

$549

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 4/1

11:00 am-6:35 pm

2 stops21h 35m

Bucharest Otopeni Intl

Sun 5/3

12:40 pm-10:26 pm

2 stops19h 46m

$552

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 2/15

1:45 pm-11:50 pm

2 stops24h 05m

Bucharest Otopeni Intl

Sun 3/1

2:50 pm-10:57 pm

2 stops18h 07m

$561

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 3/29

11:00 am-6:35 pm

2 stops21h 35m

Bucharest Otopeni Intl

Tue 4/14

1:50 pm-11:06 pm

2 stops19h 16m

$599

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 18 results
1
2

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 November.
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 $684). 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 November 13, 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 $511, United Airlines can have you in Bucharest Otopeni Intl Airport from Ontario in 24h 31m. The distance between Ontario and Bucharest Otopeni Intl Airport is about 6541 mi.

  • 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 $684). 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

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.