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$570+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IST
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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 August 14, 2025.

Round-trip from

$738
(United Airlines)

One-way from

$570
(oojo)

Popular in

June

Cheapest in

February

Average price

$1,037
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. 14% potential increase in price ($184 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 14, 2025.

This United Airlines deal was found by Cheapflights users on 8/13. 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.
Wed 10/291:40 pmONT - IST
2 stops23h 05mUnited Airlines
Wed 11/126:30 amIST - ONT
2 stops22h 04mUnited Airlines
Deal found 8/13$738
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Mon 11/31:40 pmONT - IST
2 stops22h 05mUnited Airlines
Sat 11/156:30 amIST - ONT
2 stops22h 04mUnited Airlines
Deal found 8/13$788
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Sun 10/266:05 amONT - IST
2 stops30h 40mUnited Airlines
Sun 11/25:30 amIST - ONT
2 stops41h 07mUnited Airlines
Deal found 8/12$794
This KLM deal was found by Cheapflights users on 8/13. 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.
Wed 11/1211:29 amONT - SAW
2 stops18h 56mKLM
Sun 11/1612:55 pmSAW - ONT
2 stops44h 46mKLM
Deal found 8/13$836
This United Airlines deal was found by Cheapflights users on 8/12. 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 11/11:29 pmONT - IST
2 stops47h 16mUnited Airlines
Fri 11/146:30 amIST - ONT
2 stops27h 15mUnited Airlines
Deal found 8/12$840
This KLM deal was found by Cheapflights users on 8/13. 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.
Wed 10/84:35 pmONT - IST
2 stops22h 45mKLM
Wed 10/295:55 pmIST - ONT
2 stops31h 58mKLM
Deal found 8/13$850
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Wed 9/105:10 amONT - IST
2 stops30h 10mUnited Airlines
Wed 10/86:10 amIST - ONT
2 stops21h 30mUnited Airlines
Deal found 8/13$858
This United Airlines deal was found by Cheapflights users on 8/12. 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 9/91:15 pmONT - IST
2 stops17h 45mUnited Airlines
Thu 9/256:10 amIST - ONT
2 stops21h 30mUnited Airlines
Deal found 8/12$859
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Wed 9/107:00 amONT - IST
3 stops28h 20mUnited Airlines
Mon 10/62:00 pmIST - ONT
2 stops37h 40mUnited Airlines
Deal found 8/13$878
This oojo deal was found by Cheapflights users on 8/13. 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.
Wed 12/101:35 pmONT - IST
2 stops22h 10mUnited Airlines
Tue 12/306:30 amIST - ONT
2 stops22h 13mUnited Airlines
Deal found 8/13$902
This Air France deal was found by Cheapflights users on 8/14. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/21:15 pmONT - IST
2 stops26h 05mKLM
Tue 9/166:10 amIST - ONT
2 stops23h 05mKLM
Deal found 8/14$910
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Wed 9/101:42 pmONT - IST
2 stops21h 38mUnited Airlines
Wed 9/246:10 amIST - ONT
2 stops21h 27mUnited Airlines
Deal found 8/13$958

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 August 14, 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

Wed 10/29

1:40 pm-10:45 pm

2 stops23h 05m

Istanbul

Wed 11/12

6:30 am-5:34 pm

2 stops22h 04m

$738

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Mon 11/3

1:40 pm-10:45 pm

2 stops22h 05m

Istanbul

Sat 11/15

6:30 am-5:34 pm

2 stops22h 04m

$788

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Tue 11/4

1:33 pm-5:45 pm

2 stops17h 12m

Istanbul

Sat 11/15

6:30 am-5:34 pm

2 stops22h 04m

$788

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Sun 10/26

6:05 am-10:45 pm

2 stops30h 40m

Istanbul

Sun 11/2

5:30 am-12:37 pm

2 stops41h 07m

$794

OntarioIstanbul

ONT - SAW

ONTSAW

Ontario

Wed 11/12

6:00 am-9:20 pm

2 stops28h 20m

Istanbul Sabiha Gokcen

Sun 11/16

12:55 pm-10:41 pm

2 stops44h 46m

$836

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Sat 11/1

1:29 pm-10:45 pm

2 stops47h 16m

Istanbul

Fri 11/14

6:30 am-10:45 pm

2 stops27h 15m

$840

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Wed 10/8

4:35 pm-1:20 am

2 stops22h 45m

Istanbul

Wed 10/29

5:55 pm-3:53 pm

2 stops31h 58m

$850

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Wed 9/10

1:42 pm-9:20 pm

2 stops21h 38m

Istanbul

Tue 10/7

6:10 am-5:40 pm

2 stops21h 30m

$858

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Wed 9/10

5:10 am-9:20 pm

2 stops30h 10m

Istanbul

Wed 10/8

6:10 am-5:40 pm

2 stops21h 30m

$858

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Wed 9/10

7:00 am-1:05 pm

2 stops20h 05m

Istanbul

Thu 9/25

6:10 am-5:40 pm

2 stops21h 30m

$859

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

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 $923). Flying from Ontario to Istanbul in June is currently the most expensive (average of $1,359). 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 August 14, 2025.

It’s typically best to fly out from Ontario to Istanbul at noon. Doing so could potentially save you 8% 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 August 14, 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
8,916 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Food

6.6

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
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Food

6.6

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.

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

    Currently priced at $1,195, 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.

  • 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 $923). Flying from Ontario to Istanbul in June is currently the most expensive (average of $1,359). 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,195Average$1,295FlexibilityNo cancel feeOn-time69%

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