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Cheap flights from Ontario to Bucharest from $414

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 10/8. 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 (ONT-OTP)

Cheap round-trip flights

Logo
10:57 am - 10:55 pmONT-OTP
25h 58m2 stops
Logo
8:00 am - 10:02 pmOTP-ONT
24h 02m2 stops
$519
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Tue, Jan 20 - Tue, Feb 3
United Airlines Logo
1:15 pm - 4:50 pmONT-OTP
17h 35m2 stops
United Airlines Logo
6:00 am - 5:40 pmOTP-ONT
21h 40m2 stops
$555United Airlines
Find Deal
Wed, Oct 8 - Wed, Oct 22
British Airways Logo
3:05 pm - 7:30 pmONT-OTP
18h 25m2 stops
British Airways Logo
8:05 am - 10:02 pmOTP-ONT
23h 57m2 stops
$569British Airways
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Thu, Dec 4 - Wed, Jan 28
United Airlines Logo
1:00 pm - 11:50 pmONT-OTP
48h 50m2 stops
United Airlines Logo
2:50 pm - 12:25 amOTP-ONT
19h 35m2 stops
$576United Airlines
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Sat, Jan 17 - Sat, Jan 31
United Airlines Logo
10:40 am - 11:50 pmONT-OTP
27h 10m2 stops
United Airlines Logo
5:55 am - 10:26 pmOTP-ONT
26h 31m2 stops
$577United Airlines
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Fri, Jan 16 - Fri, Jan 30
British Airways Logo
12:47 pm - 1:25 amONT-OTP
26h 38m2 stops
British Airways Logo
6:15 pm - 6:54 pmOTP-ONT
34h 39m2 stops
$579British Airways
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Tue, Sep 23 - Tue, Sep 30
United Airlines Logo
1:15 pm - 6:35 pmONT-OTP
19h 20m2 stops
United Airlines Logo
6:00 am - 10:52 pmOTP-ONT
26h 52m2 stops
$581United Airlines
Find Deal
Mon, Sep 29 - Wed, Oct 8
Air France Logo
11:45 am - 3:50 pmONT-OTP
18h 05m2 stops
Air France Logo
8:40 am - 10:23 pmOTP-ONT
23h 43m2 stops
$759Air France
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Mon, Sep 8 - Mon, Sep 15
Air Serbia Logo
11:59 pm - 4:25 pmONT-OTP
30h 26m2 stops
Air Serbia Logo
12:50 pm - 9:29 pmOTP-ONT
42h 39m2 stops
$1,238Air Serbia
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Mon, Sep 1 - Mon, Sep 15
Air Serbia Logo
10:56 pm - 4:25 pmONT-OTP
31h 29m2 stops
Air Serbia Logo
4:30 am - 9:29 pmOTP-ONT
26h 59m2 stops
$1,292Air Serbia
Find Deal
Mon, Sep 8 - Mon, Sep 22

Air Serbia flights from Ontario to Bucharest Otopeni Intl Airport

Our best Air Serbia deals on Ontario to Bucharest Otopeni Intl Airport flight tickets
Air Serbia
Sep 1
ONT11:59 pmOntario
30h 26m
2 stops
OTP4:25 pmBucharest Otopeni Intl
Sep 15
OTP12:50 pmBucharest Otopeni Intl
42h 39m
2 stops
ONT9:29 pmOntario
$1,238
Find similar
Air Serbia
Sep 8
ONT10:56 pmOntario
31h 29m
2 stops
OTP4:25 pmBucharest Otopeni Intl
Sep 22
OTP4:30 amBucharest Otopeni Intl
26h 59m
2 stops
ONT9:29 pmOntario
$1,292
Find similar

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
Oct 8
ONT1:15 pmOntario
17h 35m
2 stops
OTP4:50 pmBucharest Otopeni Intl
Oct 22
OTP6:00 amBucharest Otopeni Intl
21h 40m
2 stops
ONT5:40 pmOntario
$555
Find similar
United Airlines
Jan 17
ONT1:00 pmOntario
48h 50m
2 stops
OTP11:50 pmBucharest Otopeni Intl
Jan 31
OTP2:50 pmBucharest Otopeni Intl
19h 35m
2 stops
ONT12:25 amOntario
$576
Find similar
United Airlines
Jan 16
ONT10:40 amOntario
27h 10m
2 stops
OTP11:50 pmBucharest Otopeni Intl
Jan 30
OTP5:55 amBucharest Otopeni Intl
26h 31m
2 stops
ONT10:26 pmOntario
$577
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 August 20, 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

Tue 1/20

10:57 am-10:55 pm

2 stops25h 58m

Bucharest Otopeni Intl

Tue 2/3

8:00 am-10:02 pm

2 stops24h 02m

$519

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 10/8

1:15 pm-4:50 pm

2 stops17h 35m

Bucharest Otopeni Intl

Wed 10/22

6:00 am-5:40 pm

2 stops21h 40m

$555

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 12/4

3:05 pm-7:30 pm

2 stops18h 25m

Bucharest Otopeni Intl

Wed 1/28

8:05 am-10:02 pm

2 stops23h 57m

$569

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sat 1/17

1:00 pm-11:50 pm

2 stops48h 50m

Bucharest Otopeni Intl

Sat 1/31

2:50 pm-12:25 am

2 stops19h 35m

$576

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Fri 1/16

10:40 am-11:50 pm

2 stops27h 10m

Bucharest Otopeni Intl

Fri 1/30

5:55 am-10:26 pm

2 stops26h 31m

$577

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 9/23

12:47 pm-1:25 am

2 stops26h 38m

Bucharest Otopeni Intl

Tue 9/30

6:15 pm-6:54 pm

2 stops34h 39m

$579

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 9/29

1:15 pm-6:35 pm

2 stops19h 20m

Bucharest Otopeni Intl

Wed 10/8

6:00 am-10:52 pm

2 stops26h 52m

$581

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 9/8

11:45 am-3:50 pm

2 stops18h 05m

Bucharest Otopeni Intl

Mon 9/15

8:40 am-10:23 pm

2 stops23h 43m

$759

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 9/1

11:59 pm-4:25 pm

2 stops30h 26m

Bucharest Otopeni Intl

Mon 9/15

12:50 pm-9:29 pm

2 stops42h 39m

$1,238

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 9/8

10:56 pm-4:25 pm

2 stops31h 29m

Bucharest Otopeni Intl

Mon 9/22

4:30 am-9:29 pm

2 stops26h 59m

$1,292

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

Direct flights

None
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.
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  • 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 35m.

  • 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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