Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Ontario to Bucharest from $339

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Bucharest departing on 8/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Ontario to Bucharest

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
4:47 pm - 10:55 pm
ONT
-
OTP
20h 08m
2 stops
British Airways Logo
8:00 am - 9:59 pm
OTP
-
ONT
23h 59m
2 stops
$726British Airways
Tue, Nov 10 - Tue, Nov 24
United Airlines Logo
1:18 pm - 4:20 pm
ONT
-
OTP
17h 02m
2 stops
United Airlines Logo
6:15 am - 6:11 pm
OTP
-
ONT
21h 56m
2 stops
$737United Airlines
Tue, Aug 11 - Tue, Aug 25
United Airlines Logo
1:18 pm - 6:35 pm
ONT
-
OTP
19h 17m
2 stops
United Airlines Logo
6:15 am - 5:51 pm
OTP
-
ONT
21h 36m
2 stops
$755United Airlines
Tue, Aug 4 - Thu, Oct 8
Delta Logo
7:05 am - 1:00 pm
ONT
-
OTP
19h 55m
2 stops
Delta Logo
7:05 am - 4:14 pm
OTP
-
ONT
19h 09m
2 stops
$756Delta
Tue, Aug 4 - Thu, Oct 1
Delta Logo
7:05 am - 1:00 pm
ONT
-
OTP
19h 55m
2 stops
Delta Logo
6:00 am - 4:14 pm
OTP
-
ONT
20h 14m
2 stops
$763Delta
Tue, Aug 4 - Fri, Oct 2
Delta Logo
7:00 am - 5:10 pm
ONT
-
OTP
24h 10m
2 stops
Delta Logo
6:00 am - 6:18 pm
OTP
-
ONT
22h 18m
2 stops
$775Delta
Sun, Nov 1 - Sat, Nov 14
Delta Logo
7:00 am - 5:10 pm
ONT
-
OTP
24h 10m
2 stops
Delta Logo
6:00 am - 6:18 pm
OTP
-
ONT
22h 18m
2 stops
$776Delta
Sun, Nov 1 - Sat, Nov 14
United Airlines Logo
5:00 am - 6:35 pm
ONT
-
OTP
28h 35m
2 stops
United Airlines Logo
7:10 pm - 10:26 pm
OTP
-
ONT
37h 16m
2 stops
$788United Airlines
Fri, Oct 30 - Thu, Nov 5
United Airlines Logo
6:53 pm - 6:40 pm
ONT
-
OTP
38h 47m
2 stops
United Airlines Logo
7:10 pm - 10:26 pm
OTP
-
ONT
37h 16m
2 stops
$800United Airlines
Tue, Oct 27 - Fri, Nov 6
United Airlines Logo
6:39 pm - 1:10 am
ONT
-
OTP
20h 31m
2 stops
United Airlines Logo
6:15 am - 9:59 pm
OTP
-
ONT
25h 44m
2 stops
$814United Airlines
Sun, Aug 9 - Mon, Aug 17

United Airlines flights from Ontario to Bucharest Otopeni Intl Airport

Our best United Airlines deals on Ontario to Bucharest Otopeni Intl Airport flight tickets
United Airlines
Aug 11
ONT1:18 pmOntario
17h 02m
2 stops
OTP4:20 pmBucharest Otopeni Intl
Aug 25
OTP6:15 amBucharest Otopeni Intl
21h 56m
2 stops
ONT6:11 pmOntario
$737
United Airlines
Aug 4
ONT1:18 pmOntario
19h 17m
2 stops
OTP6:35 pmBucharest Otopeni Intl
Oct 7
OTP6:15 amBucharest Otopeni Intl
21h 36m
2 stops
ONT5:51 pmOntario
$755
United Airlines
Oct 30
ONT5:00 amOntario
28h 35m
2 stops
OTP6:35 pmBucharest Otopeni Intl
Nov 5
OTP7:10 pmBucharest Otopeni Intl
37h 16m
2 stops
ONT10:26 pmOntario
$788

British Airways flights from Ontario to Bucharest Otopeni Intl Airport

Our best British Airways deals on Ontario to Bucharest Otopeni Intl Airport flight tickets
British Airways
Nov 10
ONT4:47 pmOntario
20h 08m
2 stops
OTP10:55 pmBucharest Otopeni Intl
Nov 24
OTP8:00 amBucharest Otopeni Intl
23h 59m
2 stops
ONT9:59 pmOntario
$726
British Airways
Aug 6
ONT10:29 amOntario
28h 51m
2 stops
OTP1:20 amBucharest Otopeni Intl
Oct 8
OTP8:15 amBucharest Otopeni Intl
22h 53m
2 stops
ONT9:08 pmOntario
$955
British Airways
Aug 14
ONT12:33 pmOntario
25h 17m
2 stops
OTP11:50 pmBucharest Otopeni Intl
Aug 28
OTP8:15 amBucharest Otopeni Intl
22h 57m
2 stops
ONT9:12 pmOntario
$1,010

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Bucharest Otopeni Intl Airport 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, momondo users made 832,500 searches. Data last updated May 15, 2026.
Use the filters below to find and compare flights from Ontario to Bucharest Otopeni Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 11/10

4:47 pm-10:55 pm

2 stops20h 08m

Bucharest Otopeni Intl

Tue 11/24

8:00 am-9:59 pm

2 stops23h 59m

$726
Quickest round-trip

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 8/11

1:18 pm-4:20 pm

2 stops17h 02m

Bucharest Otopeni Intl

Tue 8/25

6:15 am-6:11 pm

2 stops21h 56m

$737

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 8/4

1:18 pm-6:35 pm

2 stops19h 17m

Bucharest Otopeni Intl

Thu 10/8

6:15 am-5:51 pm

2 stops21h 36m

$755

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 8/4

7:05 am-1:00 pm

2 stops19h 55m

Bucharest Otopeni Intl

Thu 10/1

7:05 am-4:14 pm

2 stops19h 09m

$756

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 8/4

7:05 am-1:00 pm

2 stops19h 55m

Bucharest Otopeni Intl

Fri 10/2

6:00 am-4:14 pm

2 stops20h 14m

$763

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 11/1

7:00 am-5:10 pm

2 stops24h 10m

Bucharest Otopeni Intl

Sat 11/14

6:00 am-6:18 pm

2 stops22h 18m

$775

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 11/1

7:00 am-5:10 pm

2 stops24h 10m

Bucharest Otopeni Intl

Sat 11/14

6:00 am-6:18 pm

2 stops22h 18m

$776

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Fri 10/30

5:00 am-6:35 pm

2 stops28h 35m

Bucharest Otopeni Intl

Thu 11/5

7:10 pm-10:26 pm

2 stops37h 16m

$788

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 10/27

6:53 pm-6:40 pm

2 stops38h 47m

Bucharest Otopeni Intl

Fri 11/6

7:10 pm-10:26 pm

2 stops37h 16m

$800

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 8/9

6:39 pm-1:10 am

2 stops20h 31m

Bucharest Otopeni Intl

Mon 8/17

6:15 am-9:59 pm

2 stops25h 44m

$814

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Bucharest from

How to get the cheapest flight ticket from Ontario to Bucharest Otopeni Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Ontario to Bucharest Otopeni Intl?

American Airlines, United Airlines, and British Airways are the most popular carriers operating from Ontario to Bucharest Otopeni Intl

What airlines fly to Bucharest Otopeni Intl Airport?

Lufthansa, Turkish Airlines and British Airways are the top three most popular airlines that fly to Bucharest Otopeni Intl Airport from Ontario according to our data. Lufthansa is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Bucharest Otopeni Intl Airport. Keep in mind that there are 10 different airlines that fly to Bucharest Otopeni Intl Airport on a routine basis, so you have a few additional options to choose from.

When to book flights from Ontario to Bucharest Otopeni Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Bucharest Otopeni Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Bucharest Otopeni Intl Airport (ONT to OTP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Bucharest Otopeni Intl Airport

Fastest flight time

17h 02m

Direct flights

None
The fastest flight from Ontario to Bucharest Otopeni Intl Airport takes 17h 02m
There are no direct flights from Ontario to Bucharest Otopeni Intl Airport. There are no popular flight routes from Ontario to Bucharest Otopeni Intl Airport.
Search flight deals

Frequently asked questions about flying from Ontario to Bucharest Otopeni Intl Airport

  • How far is Ontario to Bucharest Otopeni Intl by plane?

    Ontario and Bucharest Otopeni Intl are 6542.2 mi apart from one another. By plane, this route typically takes 17h 02m.

  • When did momondo last update prices for flights from Ontario Airport to Bucharest Otopeni Intl Airport?

    Prices for flights from Ontario Airport to Bucharest Otopeni Intl Airport are updated daily.

  • How many operators does momondo search for flights from Ontario Airport to Bucharest Otopeni Intl Airport?

  • How old do you have to be to fly from Ontario Airport to Bucharest Otopeni Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Bucharest Otopeni Intl Airport.

  • What documentation or ID do you need to fly to Bucharest Otopeni Intl Airport?

    The necessary travel and health documents for your Bucharest Otopeni Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Ontario to Bucharest Otopeni Intl Airport?

Best airlines flying from Ontario to Bucharest Otopeni Intl Airport

Compare and see reviews for airlines that fly from Ontario to Bucharest Otopeni Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $539Free CancellationRating
7.4
9,717 reviews
Search United Airlines flights

Traveling to a place near Bucharest?

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

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Bucharest?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Bucharest. momondo saves you time and could save you money on your trip.

Can I find flights from Ontario to Bucharest with flexible booking policies on momondo?

Flights from Ontario to Bucharest with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to Bucharest?

momondo helps you find the best flight between Ontario and Bucharest by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Ontario to Bucharest right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Bucharest, momondo offers a useful price alert feature which will track prices for flights to Bucharest from Ontario and alert you when they change.

An easier way to manage your Bucharest Otopeni Intl Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 6/14
Sun 6/21
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Bucharest