HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Istanbul

$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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IST
Mar 21 — Mar 281
Sat 3/21
Sat 3/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Istanbul with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 19, 2026.

This United Airlines deal was found by Cheapflights users on 2/16. 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 4/75:10 am
ONT
-
IST
2 stops25h 45m
United Airlines
Wed 4/225:40 am
IST
-
ONT
2 stops22h 07m
United Airlines
Deal found 2/16$579
This United Airlines deal was found by Cheapflights users on 2/15. 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 3/166:00 am
ONT
-
IST
2 stops30h 45m
United Airlines
Mon 3/236:30 am
IST
-
ONT
2 stops45h 11m
United Airlines
Deal found 2/15$584
This United Airlines deal was found by Cheapflights users on 2/15. 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 4/106:00 am
ONT
-
IST
2 stops24h 55m
United Airlines
Fri 4/245:40 am
IST
-
ONT
2 stops26h 10m
United Airlines
Deal found 2/15$629
This United Airlines deal was found by Cheapflights users on 2/17. 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 4/127:00 am
ONT
-
IST
2 stops28h 35m
United Airlines
Sun 4/265:50 am
IST
-
ONT
2 stops40h 30m
United Airlines
Deal found 2/17$634
This United Airlines deal was found by Cheapflights users on 2/16. 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 3/165:15 am
ONT
-
IST
2 stops31h 30m
United Airlines
Thu 4/25:40 am
IST
-
ONT
2 stops24h 56m
United Airlines
Deal found 2/16$654
This United Airlines deal was found by Cheapflights users on 2/16. 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 5/36:00 am
ONT
-
IST
2 stops29h 35m
United Airlines
Mon 5/111:55 pm
IST
-
ONT
2 stops37h 57m
United Airlines
Deal found 2/16$674
This United Airlines deal was found by Cheapflights users on 2/18. 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 4/2411:05 am
ONT
-
IST
2 stops24h 20m
United Airlines
Sat 5/25:50 am
IST
-
ONT
2 stops22h 11m
United Airlines
Deal found 2/18$679
This United Airlines deal was found by Cheapflights users on 2/15. 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 10/211:00 pm
ONT
-
IST
2 stops17h 55m
United Airlines
Tue 11/106:30 am
IST
-
ONT
2 stops22h 17m
United Airlines
Deal found 2/15$695
This United Airlines deal was found by Cheapflights users on 2/18. 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 4/281:34 pm
ONT
-
IST
2 stops21h 41m
United Airlines
Thu 5/141:55 pm
IST
-
ONT
2 stops19h 04m
United Airlines
Deal found 2/18$700
This United Airlines deal was found by Cheapflights users on 2/15. 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 3/231:40 pm
ONT
-
IST
2 stops23h 05m
United Airlines
Mon 4/205:50 am
IST
-
ONT
2 stops26h 00m
United Airlines
Deal found 2/15$704
This United Airlines deal was found by Cheapflights users on 2/16. 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
Sun 5/105:50 am
IST
-
ONT
2 stops27h 09m
United Airlines
Deal found 2/16$709
This Billigflug deal was found by Cheapflights users on 2/16. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/66:49 pm
ONT
-
IST
2 stops40h 26m
Multiple Airlines
Tue 4/215:40 am
IST
-
ONT
2 stops22h 22m
Multiple Airlines
Deal found 2/16$715

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 19, 2026.

Round-trip from

$579
(United Airlines)

One-way from

$464
(United Airlines)

Popular in

June

Cheapest in

January

Average price

$742
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 ($225 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($39 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 19, 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 4/7

5:10 am-4:55 pm

2 stops25h 45m

Istanbul

Wed 4/22

5:40 am-5:47 pm

2 stops22h 07m

$579

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Tue 4/7

1:27 pm-9:15 pm

2 stops21h 48m

Istanbul

Tue 4/21

5:40 am-9:50 pm

2 stops26h 10m

$579

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Mon 4/20

1:27 pm-9:25 pm

2 stops21h 58m

Istanbul

Tue 4/28

5:40 am-9:50 pm

2 stops26h 10m

$579

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Mon 3/16

6:00 am-10:45 pm

2 stops30h 45m

Istanbul

Mon 3/23

6:30 am-5:41 pm

2 stops45h 11m

$584

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Fri 4/10

6:00 am-4:55 pm

2 stops24h 55m

Istanbul

Fri 4/24

5:40 am-9:50 pm

2 stops26h 10m

$629

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Sun 4/12

7:00 am-9:35 pm

2 stops28h 35m

Istanbul

Sun 4/26

5:50 am-12:20 pm

2 stops40h 30m

$634

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Mon 4/13

1:27 pm-9:25 pm

2 stops21h 58m

Istanbul

Tue 4/21

5:40 am-9:50 pm

2 stops26h 10m

$654

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Tue 3/17

11:59 pm-10:45 pm

2 stops36h 46m

Istanbul

Wed 4/1

5:40 am-10:26 pm

2 stops26h 46m

$654

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Fri 4/24

11:05 am-9:25 pm

2 stops24h 20m

Istanbul

Sat 5/2

5:50 am-6:01 pm

2 stops22h 11m

$679

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Mon 3/23

1:40 pm-10:45 pm

2 stops23h 05m

Istanbul

Mon 4/20

5:50 am-9:50 pm

2 stops26h 00m

$704

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/16

Showing 1-10 of 42 results
1
2
3
...
5

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 $902). 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 19, 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
9,321 reviews

Comfort

7.3

Crew

8.1

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

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
9,321 reviews
United Airlines
7.4
Good
9,321 reviews

Comfort

7.3

Crew

8.1

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

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, KLM, and Qatar Airways fly from Ontario to Istanbul in about 24h 25m. The time it takes to get you to your destination can typically vary by up to 19h 45m. The distance between Ontario and Istanbul is about 6842 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 $902). 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.

Alternative routes for Ontario to Istanbul

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Istanbul flights
San Francisco to Istanbul flights
Los Angeles to Sabiha Gokcen flights
San Francisco to Sabiha Gokcen flights
San Jose to Istanbul flights
Ontario to Istanbul flights
Oakland to Istanbul flights
Santa Ana to Istanbul flights
Las Vegas to Istanbul flights
San Jose to Sabiha Gokcen flights
Burbank to Istanbul flights
Ontario to Sabiha Gokcen flights
Oakland to Sabiha Gokcen flights
Burbank to Sabiha Gokcen flights
San Diego to Istanbul flights
Las Vegas to Sabiha Gokcen flights
San Diego to Sabiha Gokcen flights
Sacramento to Istanbul flights
San Francisco to Izmir flights
Sacramento to Sabiha Gokcen flights
Los Angeles to Izmir flights
Los Angeles to Antalya flights
San Francisco to Dalaman flights
San Diego to Izmir flights
San Jose to Tarsus flights
Los Angeles to Ankara flights
San Francisco to Antalya flights
Los Angeles to Dalaman flights
Reno to Istanbul flights
San Luis Obispo to Istanbul flights
San Francisco to Kayseri flights
San Francisco to Bodrum flights
Las Vegas to Antalya flights
Los Angeles to Bodrum flights
Long Beach to Istanbul flights
Reno to Sabiha Gokcen flights
San Francisco to Ankara flights
Los Angeles to Kayseri flights
San Francisco to Denizli flights
San Francisco to Sivas flights
Los Angeles to Konya flights
Los Angeles to Trabzon flights
San Francisco to Van flights
San Jose to Dalaman flights
San Francisco to Gazipaşa flights
San Francisco to Gaziantep flights

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 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$775Average$1,195FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.