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$459+ Cheap flights from Ontario (ONT) to Istanbul

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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IST
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
1 adult, Economy
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Cheap flight deals from Ontario to Istanbul

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Istanbul (TR5). 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 October 23, 2025.

Round-trip from

$575
(United Airlines)

One-way from

$459
(United Airlines)

Popular in

June

Cheapest in

February

Average price

$950
From Ontario to Istanbul
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One-way flight from Ontario to Istanbul
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Highest demand for flights based on searches. 15% potential increase in price ($192 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Ontario to Istanbul

Cheapest flights from Ontario to Istanbul
Explore the most affordable flight options available from Ontario to Istanbul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 23, 2025.

This United Airlines deal was found by Cheapflights users on 10/23. 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 12/36:00 amONT - IST
2 stops29h 45mUnited Airlines
Wed 12/176:30 amIST - ONT
2 stops22h 05mUnited Airlines
Deal found 10/23$575
This United Airlines deal was found by Cheapflights users on 10/21. 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 11/197:00 amONT - IST
2 stops28h 45mUnited Airlines
Thu 11/276:30 amIST - ONT
2 stops22h 04mUnited Airlines
Deal found 10/21$650
This United Airlines deal was found by Cheapflights users on 10/22. 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 12/66:00 amONT - IST
2 stops29h 45mUnited Airlines
Sat 12/136:30 amIST - ONT
2 stops25h 12mUnited Airlines
Deal found 10/22$675
This United Airlines deal was found by Cheapflights users on 10/21. 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 12/311:40 pmONT - IST
2 stops17h 25mUnited Airlines
Wed 1/146:30 amIST - ONT
2 stops27h 23mUnited Airlines
Deal found 10/21$726
This United Airlines deal was found by Cheapflights users on 10/23. 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.
Thu 11/131:40 pmONT - IST
2 stops22h 05mUnited Airlines
Thu 11/276:30 amIST - ONT
2 stops22h 04mUnited Airlines
Deal found 10/23$775
This Delta deal was found by Cheapflights users on 10/21. 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.
Thu 11/611:36 amONT - IST
2 stops29h 14mDelta
Tue 11/114:50 amIST - ONT
2 stops29h 14mDelta
Deal found 10/21$787
This KLM deal was found by Cheapflights users on 10/23. 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.
Wed 12/36:40 amONT - IST
2 stops23h 15mKLM
Tue 12/164:50 amIST - ONT
2 stops29h 14mKLM
Deal found 10/23$793
This United Airlines deal was found by Cheapflights users on 10/23. 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 12/3010:42 amONT - IST
2 stops20h 03mUnited Airlines
Wed 1/146:30 amIST - ONT
2 stops27h 23mUnited Airlines
Deal found 10/23$820
This United Airlines deal was found by Cheapflights users on 10/23. 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 12/11:40 pmONT - IST
2 stops22h 05mUnited Airlines
Mon 12/86:30 amIST - ONT
2 stops26h 19mUnited Airlines
Deal found 10/23$840
This FlightHub deal was found by Cheapflights users on 10/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/234:47 pmONT - IST
2 stops21h 03mBritish Airways
Sun 12/78:20 amIST - ONT
2 stops24h 40mBritish Airways
Deal found 10/21$864
This Iberia deal was found by Cheapflights users on 10/22. 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.
Tue 11/117:00 amONT - SAW
2 stops24h 55mIberia
Wed 1/2811:35 amSAW - ONT
2 stops37h 43mIberia
Deal found 10/22$993
This oojo deal was found by Cheapflights users on 10/22. 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.
Tue 10/2811:59 amONT - SAW
2 stops38h 11mQatar Airways
Tue 12/91:40 pmSAW - ONT
2 stops39h 53mQatar Airways
Deal found 10/22$1,107

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Istanbul 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 October 23, 2025.
Use the filters below to find and compare flights from Ontario to Istanbul that are best for you.

Fly from

Ontario

Fly to

Istanbul

Route

Depart

Return

Price

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Fri 12/5

1:50 pm-10:45 pm

2 stops21h 55m

Istanbul

Wed 12/17

6:30 am-5:35 pm

2 stops22h 05m

$575

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Tue 2/10

6:00 am-5:45 pm

2 stops24h 45m

Istanbul

Tue 2/24

6:30 am-5:41 pm

2 stops22h 11m

$576

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Tue 1/6

5:05 pm-4:55 pm

2 stops36h 50m

Istanbul

Thu 1/15

4:50 am-10:38 pm

2 stops28h 48m

$668

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Mon 3/16

1:49 pm-10:45 pm

2 stops22h 56m

Istanbul

Thu 4/2

6:10 am-9:21 pm

2 stops25h 11m

$726

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Wed 11/5

1:45 pm-10:45 pm

2 stops22h 00m

Istanbul

Wed 11/12

6:30 am-5:34 pm

2 stops22h 04m

$775

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Wed 11/12

1:33 pm-10:45 pm

2 stops22h 12m

Istanbul

Sun 11/23

6:30 am-5:34 pm

2 stops22h 04m

$775

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Thu 11/6

1:40 pm-10:45 pm

2 stops22h 05m

Istanbul

Mon 11/10

6:30 am-5:34 pm

2 stops22h 04m

$775

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Thu 11/13

1:40 pm-10:45 pm

2 stops22h 05m

Istanbul

Thu 11/27

6:30 am-5:34 pm

2 stops22h 04m

$775

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Sun 12/7

6:00 am-10:45 pm

2 stops29h 45m

Istanbul

Sun 12/14

6:30 am-10:49 pm

3 stops27h 19m

$775

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Thu 1/22

10:58 am-5:30 pm

2 stops19h 32m

Istanbul

Thu 2/5

7:35 am-6:45 pm

2 stops22h 10m

$777

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/23

Showing 1-10 of 42 results
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Best time to book a flight from Ontario to Istanbul

Have a flexible travel schedule? Discover the best time to fly to Istanbul 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 Istanbul

What is the cheapest month to book a flight from Ontario to Istanbul?

Currently, November is the cheapest month in which you can book a flight from Ontario to Istanbul (average of $610). Flying from Ontario to Istanbul in July is currently the most expensive (average of $906). 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 IST?

Find hourly flight availability from Ontario to Istanbul. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 23, 2025.

It’s typically best to fly out from Ontario to Istanbul in the afternoon. Doing so could potentially save you 27% on the flight price compared to flying in the morning, which is usually more expensive.

Reviews of airlines servicing Istanbul

Get insights into the airlines that provide service to Istanbul. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Istanbul. Reviews last updated October 23, 2025.
Peruse reviews from past customers who have flown with United Airlines from Ontario to Istanbul to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,995 reviews

Overall

7.4

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,995 reviews
United Airlines
7.4
Good
8,995 reviews

Overall

7.4

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Ontario to Istanbul. 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 Istanbul?

    For a flight from Ontario to Istanbul, you will be flying from Ontario. Ontario (ONT) is just 3.1 mi from the center of the city. Ontario is the only Ontario airport and it handles 0 outbound flights to Istanbul per day. 1 airline has flights to Istanbul from Ontario on a regular basis.

  • How long is the flight from Ontario to Istanbul?

    Airlines like United Airlines, Delta, and Iberia fly from Ontario to Istanbul in about 21h 55m. The time it takes to get you to your destination can typically vary by up to 14h 55m. The distance between Ontario and Istanbul is about 6805 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Ontario to Istanbul round-trip?

    Currently priced at $775, United Airlines will fly you from Ontario to Istanbul and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip.

  • What are the cheapest airlines to fly from Ontario to Istanbul one-way?

    $459 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Iberia and Qatar Airways, with prices starting from $569 and $611, respectively.

  • Can I find deals for flights from Ontario to Istanbul that include hotel bookings?

    Yes. In addition to deals on Ontario to Istanbul flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Istanbul?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Istanbul.

  • Can I find deals for business class flights from Ontario to Istanbul?

    Yes. Cheapflights offers flight deals from Ontario to Istanbul 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 Istanbul?

    Currently, November is the cheapest month in which you can book a flight from Ontario to Istanbul (average of $610). Flying from Ontario to Istanbul in July is currently the most expensive (average of $906). 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

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Top airline flying from Ontario to Istanbul

Discover the top airline that operate flights from Ontario to Istanbul. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$775Average$1,195FlexibilityNo cancel feeOn-time69%

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