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$464+ 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IST
Mar 14 — Mar 211
Sat 3/14
Sat 3/21
1 adult, Economy
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Cheap 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 February 12, 2026.

This United Airlines deal was found by Cheapflights users on 2/9. 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 4/141:27 pm
ONT
-
IST
2 stops21h 48m
United Airlines
Tue 5/121:55 pm
IST
-
ONT
2 stops19h 04m
United Airlines
Deal found 2/9$578
This United Airlines deal was found by Cheapflights users on 2/11. 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 3/111:40 pm
ONT
-
IST
2 stops23h 05m
United Airlines
Thu 3/196:30 am
IST
-
ONT
2 stops26h 27m
United Airlines
Deal found 2/11$579
This KAYAK deal was found by Cheapflights users on 2/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/101:40 pm
ONT
-
IST
2 stops23h 05m
Lufthansa
Thu 3/196:30 am
IST
-
ONT
2 stops26h 27m
Lufthansa
Deal found 2/11$592
This KAYAK deal was found by Cheapflights users on 2/9. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/71:27 pm
ONT
-
IST
2 stops21h 48m
Lufthansa
Tue 4/281:55 pm
IST
-
ONT
2 stops32h 19m
Lufthansa
Deal found 2/9$598
This United Airlines deal was found by Cheapflights users on 2/10. 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 4/251:34 pm
ONT
-
IST
2 stops46h 01m
United Airlines
Mon 5/41:55 pm
IST
-
ONT
2 stops37h 57m
United Airlines
Deal found 2/10$604
This KAYAK deal was found by Cheapflights users on 2/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/125:10 am
ONT
-
IST
2 stops25h 50m
Lufthansa
Mon 4/271:55 pm
IST
-
ONT
2 stops38h 07m
Lufthansa
Deal found 2/11$614
This United Airlines deal was found by Cheapflights users on 2/9. 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 4/161:27 pm
ONT
-
IST
2 stops22h 08m
United Airlines
Wed 4/295:40 am
IST
-
ONT
2 stops26h 10m
United Airlines
Deal found 2/9$628
This United Airlines deal was found by Cheapflights users on 2/11. 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 4/61:27 pm
ONT
-
IST
2 stops21h 58m
United Airlines
Mon 4/205:50 am
IST
-
ONT
2 stops21h 57m
United Airlines
Deal found 2/11$629
This United Airlines deal was found by Cheapflights users on 2/9. 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 4/41:34 pm
ONT
-
IST
2 stops46h 01m
United Airlines
Sat 4/185:50 am
IST
-
ONT
2 stops26h 00m
United Airlines
Deal found 2/9$633
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Fri 4/176:05 am
ONT
-
IST
2 stops29h 20m
United Airlines
Fri 5/11:55 pm
IST
-
ONT
2 stops32h 27m
United Airlines
Deal found 2/10$634
This United Airlines deal was found by Cheapflights users on 2/10. 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 4/91:34 pm
ONT
-
IST
2 stops22h 01m
United Airlines
Thu 4/301:55 pm
IST
-
ONT
2 stops42h 03m
United Airlines
Deal found 2/10$649
This United Airlines deal was found by Cheapflights users on 2/9. 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 3/241:50 pm
ONT
-
IST
2 stops22h 55m
United Airlines
Wed 4/85:40 am
IST
-
ONT
2 stops22h 07m
United Airlines
Deal found 2/9$653

Find 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 February 12, 2026.

Round-trip from

$578
(United Airlines)

One-way from

$464
(United Airlines)

Popular in

June

Cheapest in

January

Average price

$720
From Ontario to Istanbul
Search Deals
One-way flight from Ontario to Istanbul
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($229 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 12, 2026.
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

Tue 4/14

1:27 pm-9:15 pm

2 stops21h 48m

Istanbul

Tue 4/28

5:40 am-9:50 pm

2 stops26h 10m

$578

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Wed 4/29

1:34 pm-9:25 pm

2 stops21h 51m

Istanbul

Fri 5/8

5:40 am-9:58 pm

2 stops26h 18m

$578

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Tue 4/14

1:27 pm-9:15 pm

2 stops21h 48m

Istanbul

Tue 5/12

1:55 pm-10:59 pm

2 stops19h 04m

$578

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Thu 3/12

1:40 pm-10:45 pm

2 stops23h 05m

Istanbul

Thu 3/19

6:30 am-10:57 pm

2 stops26h 27m

$578

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Wed 3/11

1:40 pm-10:45 pm

2 stops23h 05m

Istanbul

Thu 3/19

6:30 am-10:57 pm

2 stops26h 27m

$579

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Sat 4/25

1:34 pm-9:35 pm

2 stops46h 01m

Istanbul

Mon 5/4

1:55 pm-5:52 pm

2 stops37h 57m

$604

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Mon 4/6

1:27 pm-9:25 pm

2 stops21h 58m

Istanbul

Mon 4/27

5:50 am-5:47 pm

2 stops21h 57m

$628

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Thu 4/9

1:34 pm-4:55 pm

2 stops17h 21m

Istanbul

Tue 4/14

5:40 am-9:50 pm

2 stops26h 10m

$628

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Sun 4/19

11:05 am-9:35 pm

2 stops24h 30m

Istanbul

Mon 5/4

5:50 am-5:52 pm

2 stops22h 02m

$628

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Thu 4/9

1:34 pm-9:35 pm

2 stops22h 01m

Istanbul

Thu 4/30

1:55 pm-9:58 pm

2 stops42h 03m

$649

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/8

Showing 1-10 of 44 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, January is the cheapest month in which you can book a flight from Ontario to Istanbul (average of $513). Flying from Ontario to Istanbul in July is currently the most expensive (average of $903). 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.

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 February 12, 2026.
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
9,276 reviews

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

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
9,276 reviews
United Airlines
7.4
Good
9,276 reviews

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

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, KLM, and Iberia fly from Ontario to Istanbul in about 21h 48m. The time it takes to get you to your destination can typically vary by up to 4h 07m. 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.

  • 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, January is the cheapest month in which you can book a flight from Ontario to Istanbul (average of $513). Flying from Ontario to Istanbul in July is currently the most expensive (average of $903). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 February 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$775Average$1,195FlexibilityNo cancel feeOn-time69%

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