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Cheap flights from Ontario to Bucharest from $374

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 1/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ontario to Bucharest

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:58 am - 3:30 pm
ONT
-
OTP
18h 32m2 stops
Multiple Airlines Logo
8:05 am - 10:48 pm
OTP
-
ONT
24h 43m2 stops
$463Multiple Airlines
Mon, Jan 12 - Wed, Jan 28
British Airways Logo
5:02 pm - 11:30 pm
ONT
-
OTP
21h 28m2 stops
British Airways Logo
8:25 am - 9:56 pm
OTP
-
ONT
23h 31m2 stops
$494British Airways
Wed, Mar 25 - Tue, Apr 7
British Airways Logo
11:01 am - 7:05 pm
ONT
-
OTP
22h 04m2 stops
British Airways Logo
8:25 am - 9:56 pm
OTP
-
ONT
23h 31m2 stops
$497British Airways
Fri, Apr 17 - Thu, Apr 30
Multiple Airlines Logo
11:01 am - 2:30 pm
ONT
-
OTP
17h 29m2 stops
Multiple Airlines Logo
8:25 am - 9:56 pm
OTP
-
ONT
23h 31m2 stops
$513Multiple Airlines
Thu, Apr 9 - Thu, May 7
British Airways Logo
4:45 pm - 3:05 pm
ONT
-
OTP
36h 20m2 stops
British Airways Logo
7:35 am - 10:49 pm
OTP
-
ONT
25h 14m2 stops
$536British Airways
Fri, Jan 30 - Sun, Feb 15
United Airlines Logo
6:00 am - 2:10 pm
ONT
-
OTP
22h 10m2 stops
United Airlines Logo
5:55 am - 5:43 pm
OTP
-
ONT
21h 48m2 stops
$538United Airlines
Fri, Jan 9 - Fri, Jan 23
British Airways Logo
2:47 pm - 7:30 pm
ONT
-
OTP
19h 43m2 stops
British Airways Logo
8:20 am - 10:07 pm
OTP
-
ONT
23h 47m2 stops
$547British Airways
Thu, Mar 26 - Sun, Apr 5
United Airlines Logo
1:50 pm - 6:35 pm
ONT
-
OTP
19h 45m2 stops
United Airlines Logo
5:55 am - 8:46 pm
OTP
-
ONT
24h 51m2 stops
$551United Airlines
Mon, Mar 23 - Mon, Apr 6
United Airlines Logo
5:05 am - 11:50 pm
ONT
-
OTP
32h 45m2 stops
United Airlines Logo
5:55 am - 10:53 pm
OTP
-
ONT
26h 58m2 stops
$562United Airlines
Thu, Jan 29 - Mon, Feb 2
United Airlines Logo
1:40 pm - 6:35 pm
ONT
-
OTP
18h 55m2 stops
United Airlines Logo
6:05 am - 10:53 pm
OTP
-
ONT
26h 48m2 stops
$600United Airlines
Mon, Dec 29 - Wed, Jan 28

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
Jan 9
ONT6:00 amOntario
22h 10m
2 stops
OTP2:10 pmBucharest Otopeni Intl
Jan 23
OTP5:55 amBucharest Otopeni Intl
21h 48m
2 stops
ONT5:43 pmOntario
$538
Find similar
United Airlines
Mar 23
ONT1:50 pmOntario
19h 45m
2 stops
OTP6:35 pmBucharest Otopeni Intl
Apr 6
OTP5:55 amBucharest Otopeni Intl
24h 51m
2 stops
ONT8:46 pmOntario
$551
Find similar
United Airlines
Jan 29
ONT5:05 amOntario
32h 45m
2 stops
OTP11:50 pmBucharest Otopeni Intl
Feb 2
OTP5:55 amBucharest Otopeni Intl
26h 58m
2 stops
ONT10:53 pmOntario
$562
Find similar

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
Jan 11
ONT4:45 pmOntario
21h 00m
2 stops
OTP11:45 pmBucharest Otopeni Intl
Jan 25
OTP7:35 amBucharest Otopeni Intl
25h 13m
2 stops
ONT10:48 pmOntario
$492
Find similar
British Airways
Mar 25
ONT5:02 pmOntario
21h 28m
2 stops
OTP11:30 pmBucharest Otopeni Intl
Apr 7
OTP8:25 amBucharest Otopeni Intl
23h 31m
2 stops
ONT9:56 pmOntario
$494
Find similar
British Airways
Apr 17
ONT11:01 amOntario
22h 04m
2 stops
OTP7:05 pmBucharest Otopeni Intl
Apr 30
OTP8:25 amBucharest Otopeni Intl
23h 31m
2 stops
ONT9:56 pmOntario
$497
Find similar

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 December 10, 2025.
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

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 1/12

10:58 am-3:30 pm

2 stops18h 32m

Bucharest Otopeni Intl

Wed 1/28

8:05 am-10:48 pm

2 stops24h 43m

$463

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 3/25

5:02 pm-11:30 pm

2 stops21h 28m

Bucharest Otopeni Intl

Tue 4/7

8:25 am-9:56 pm

2 stops23h 31m

$494

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Fri 4/17

11:01 am-7:05 pm

2 stops22h 04m

Bucharest Otopeni Intl

Thu 4/30

8:25 am-9:56 pm

2 stops23h 31m

$497

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 4/9

11:01 am-2:30 pm

2 stops17h 29m

Bucharest Otopeni Intl

Thu 5/7

8:25 am-9:56 pm

2 stops23h 31m

$513

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Fri 1/30

4:45 pm-3:05 pm

2 stops36h 20m

Bucharest Otopeni Intl

Sun 2/15

7:35 am-10:49 pm

2 stops25h 14m

$536

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Fri 1/9

6:00 am-2:10 pm

2 stops22h 10m

Bucharest Otopeni Intl

Fri 1/23

5:55 am-5:43 pm

2 stops21h 48m

$538

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 3/26

2:47 pm-7:30 pm

2 stops19h 43m

Bucharest Otopeni Intl

Sun 4/5

8:20 am-10:07 pm

2 stops23h 47m

$547

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 3/23

1:50 pm-6:35 pm

2 stops19h 45m

Bucharest Otopeni Intl

Mon 4/6

5:55 am-8:46 pm

2 stops24h 51m

$551

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 1/29

5:05 am-11:50 pm

2 stops32h 45m

Bucharest Otopeni Intl

Mon 2/2

5:55 am-10:53 pm

2 stops26h 58m

$562

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 12/29

1:40 pm-6:35 pm

2 stops18h 55m

Bucharest Otopeni Intl

Wed 1/28

6:05 am-10:53 pm

2 stops26h 48m

$600

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 day to depart on your flight to Bucharest Otopeni Intl Airport?

Our data shows that Wednesday is the least expensive day to fly to Bucharest Otopeni Intl Airport. Tickets to fly out on this day can be as low as $704. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Bucharest Otopeni Intl Airport for around $824.

What is the cheapest time of day to depart on your flight to Bucharest Otopeni Intl Airport?

Our most recent data shows that the best time of day to fly to Bucharest Otopeni Intl Airport is in the morning. Flights from Ontario to Bucharest Otopeni Intl Airport during this time can be as low as $715. In the afternoon is when there is more demand to fly to Bucharest Otopeni Intl Airport, so prices are often more expensive at around $792 per ticket.

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 13m

Direct flights

None
The fastest flight from Ontario to Bucharest Otopeni Intl Airport takes 17h 13m
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

  • 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 13m.

  • 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 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.

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.

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