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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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BUH
oct. 15 — oct. 221
mié. 10/15
mié. 10/22
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 septiembre 15, 2025.

Round-trip from

$469
(British Airways)

One-way from

$411
(United Airlines)

Popular in

December

Cheapest in

October

Average price

$709
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. 9% potential increase in price ($75 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 September 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 septiembre 15, 2025.

This Delta deal was found by Cheapflights users on 9/13. 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.
dom. 11/235:49 pmONT - OTP
2 stops43h 01mDelta
mar. 12/96:05 amOTP - ONT
2 stops21h 02mDelta
Deal found 9/13$486
This Delta deal was found by Cheapflights users on 9/13. 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.
dom. 11/235:49 pmONT - OTP
2 stops43h 01mDelta
lun. 12/81:55 pmOTP - ONT
2 stops55h 15mDelta
Deal found 9/13$487
This Delta deal was found by Cheapflights users on 9/13. 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.
dom. 11/2310:25 pmONT - OTP
2 stops32h 45mDelta
mié. 12/106:05 amOTP - ONT
2 stops27h 54mDelta
Deal found 9/13$490
This KLM deal was found by Cheapflights users on 9/13. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/256:00 amONT - OTP
2 stops23h 25mMultiple Airlines
jue. 12/118:40 amOTP - ONT
2 stops24h 23mMultiple Airlines
Deal found 9/13$498
This Delta deal was found by Cheapflights users on 9/13. 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.
mié. 11/266:45 amONT - OTP
2 stops44h 15mDelta
mar. 12/96:05 amOTP - ONT
2 stops21h 02mDelta
Deal found 9/13$499
This Delta deal was found by Cheapflights users on 9/13. 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.
mar. 11/256:45 amONT - OTP
2 stops24h 25mDelta
lun. 12/81:55 pmOTP - ONT
2 stops44h 04mDelta
Deal found 9/13$500
This United Airlines deal was found by Cheapflights users on 9/13. 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.
lun. 11/245:05 amONT - OTP
2 stops27h 30mUnited Airlines
mar. 12/95:55 amOTP - ONT
3 stops26h 54mUnited Airlines
Deal found 9/13$521
This United Airlines deal was found by Cheapflights users on 9/13. 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.
mié. 11/267:00 amONT - OTP
2 stops22h 50mMultiple Airlines
mié. 12/106:05 amOTP - ONT
3 stops21h 32mMultiple Airlines
Deal found 9/13$523
This United Airlines deal was found by Cheapflights users on 9/13. 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.
sáb. 11/299:35 pmONT - OTP
2 stops40h 15mUnited Airlines
mar. 12/95:55 amOTP - ONT
2 stops24h 47mUnited Airlines
Deal found 9/13$526
This oojo deal was found by Cheapflights users on 9/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/292:51 pmONT - OTP
2 stops23h 39mBritish Airways
mié. 11/53:50 pmOTP - ONT
2 stops40h 33mBritish Airways
Deal found 9/13$536

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 septiembre 15, 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

mié. 1/14

5:03 pm-8:00 pm

2 stops16h 57m

Bucharest Otopeni Intl

mié. 1/28

8:05 am-10:02 pm

2 stops23h 57m

$469

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

lun. 11/24

6:45 am-10:50 pm

2 stops30h 05m

Bucharest Otopeni Intl

vie. 12/12

6:05 am-11:59 pm

2 stops27h 54m

$486

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

dom. 11/23

5:49 pm-10:50 pm

2 stops43h 01m

Bucharest Otopeni Intl

jue. 12/11

6:05 am-5:07 pm

2 stops21h 02m

$486

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

lun. 11/24

6:45 am-10:50 pm

2 stops30h 05m

Bucharest Otopeni Intl

mié. 12/10

6:05 am-11:59 pm

2 stops27h 54m

$486

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

mié. 11/26

6:00 am-5:10 pm

2 stops25h 10m

Bucharest Otopeni Intl

mié. 12/10

6:05 am-11:10 am

2 stops39h 05m

$490

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

mar. 11/25

1:20 pm-5:10 pm

2 stops41h 50m

Bucharest Otopeni Intl

mar. 12/9

6:05 am-5:07 pm

2 stops21h 02m

$491

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

mar. 11/25

6:45 am-3:25 pm

2 stops22h 40m

Bucharest Otopeni Intl

mar. 12/9

8:40 am-11:03 pm

2 stops24h 23m

$498

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

mié. 11/26

6:45 am-1:00 pm

2 stops44h 15m

Bucharest Otopeni Intl

mar. 12/9

6:05 am-5:07 pm

2 stops21h 02m

$499

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

lun. 11/24

5:05 am-6:35 pm

2 stops27h 30m

Bucharest Otopeni Intl

jue. 12/11

5:50 am-10:49 pm

3 stops26h 59m

$521

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

dom. 11/23

1:40 pm-6:35 pm

2 stops42h 55m

Bucharest Otopeni Intl

jue. 12/11

5:50 am-10:49 pm

3 stops26h 59m

$521

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 18 results
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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 $1,130). 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 septiembre 15, 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.

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.

  • How long is the flight from Ontario to Bucharest?

    There are many flights that can get you from Ontario to Bucharest in 16h 57m. Fly via British Airways or Delta to get the fastest option. Airlines will cover a distance of 6541 mi. This flight may include one or multiple stops.

  • 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 $1,130). 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?

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

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