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Ontario

$564+ Cheap flights from Istanbul (IST) to Ontario (ONT)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
IST — ONT
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheap flight deals from Istanbul to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Istanbul (IST) to Ontario (ONT). 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 July 29, 2025.

Round-trip from

$564
(American Airlines)

Popular in

August

Cheapest in

February

Average price

$867
From Istanbul to Ontario
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($145 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Istanbul to Ontario

Cheapest flights from Istanbul to Ontario
Explore the most affordable flight options available from Istanbul to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This American Airlines deal was found by Cheapflights users on 7/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/138:25 amIST - ONT
2 stops23h 24mAmerican Airlines
Sun 10/194:49 pmONT - IST
2 stops21h 36mAmerican Airlines
Deal found 7/28$564
This British Airways deal was found by Cheapflights users on 7/28. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/268:10 amIST - ONT
2 stops24h 32mBritish Airways
Sat 2/2111:05 amONT - IST
2 stops19h 20mBritish Airways
Deal found 7/28$569
This Iberia deal was found by Cheapflights users on 7/28. 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.
Fri 11/218:10 amIST - ONT
2 stops25h 13mMultiple Airlines
Mon 1/1210:57 amONT - IST
2 stops19h 33mMultiple Airlines
Deal found 7/28$571
This Delta deal was found by Cheapflights users on 7/27. 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.
Tue 9/236:10 amIST - ONT
2 stops26h 13mDelta
Tue 10/2111:36 amONT - IST
2 stops18h 44mDelta
Deal found 7/27$683
This United Airlines deal was found by Cheapflights users on 7/28. 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 12/176:30 amIST - ONT
2 stops22h 07mUnited Airlines
Sun 1/41:00 pmONT - IST
2 stops22h 45mUnited Airlines
Deal found 7/28$709
This oojo deal was found by Cheapflights users on 7/28. 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.
Sat 10/118:05 pmIST - ONT
2 stops37h 58mQatar Airways
Sat 10/186:00 amONT - IST
2 stops43h 55mQatar Airways
Deal found 7/28$1,120

Cheapflights Fare Finder

 
Customize your flight search to find flights from Istanbul to Ontario 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 July 29, 2025.
Use the filters below to find and compare flights from Istanbul Airport to Ontario that are best for you.

Fly from

Istanbul

Fly to

Ontario

Route

Depart

Return

Price

IstanbulOntario

IST - ONT

ISTONT

Istanbul

Mon 10/13

8:25 am-9:49 pm

2 stops23h 24m

Ontario

Sun 10/19

4:49 pm-12:25 am

2 stops21h 36m

$564

IstanbulOntario

IST - ONT

ISTONT

Istanbul

Fri 12/26

8:10 am-9:42 pm

2 stops24h 32m

Ontario

Sat 2/21

11:05 am-5:25 pm

2 stops19h 20m

$569

IstanbulOntario

IST - ONT

ISTONT

Istanbul

Fri 11/21

8:10 am-10:23 pm

2 stops25h 13m

Ontario

Mon 1/12

10:57 am-5:30 pm

2 stops19h 33m

$571

IstanbulOntario

IST - ONT

ISTONT

Istanbul

Tue 9/23

6:10 am-10:23 pm

2 stops26h 13m

Ontario

Tue 10/21

11:36 am-4:20 pm

2 stops18h 44m

$683

IstanbulOntario

IST - ONT

ISTONT

Istanbul

Wed 12/17

6:30 am-5:37 pm

2 stops22h 07m

Ontario

Sun 1/4

1:00 pm-10:45 pm

2 stops22h 45m

$709

IstanbulOntario

IST - ONT

ISTONT

Istanbul

Sat 10/11

8:05 pm-12:03 am

2 stops37h 58m

Ontario

Sat 10/18

6:00 am-11:55 am

2 stops43h 55m

$1,120

IstanbulOntario

IST - ONT

ISTONT

Istanbul

Tue 10/21

8:05 pm-12:03 am

2 stops37h 58m

$640

IstanbulOntario

IST - ONT

ISTONT

Istanbul

Tue 9/9

5:00 pm-10:33 pm

2 stops39h 33m

$646

IstanbulOntario

IST - ONT

ISTONT

Istanbul

Sat 9/13

8:25 am-10:33 pm

2 stops24h 08m

$650

IstanbulOntario

IST - ONT

ISTONT

Istanbul

Mon 9/8

12:50 am-9:29 pm

1 stop30h 39m

$711

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 12 results
1
2

Best time to book a flight from Istanbul to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Istanbul Airport to Ontario (average of $246). Flying from Istanbul Airport to Ontario in March is currently the most expensive (average of $328). 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 Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated July 29, 2025.
Get a feel of what it's like to fly with Delta, Qatar Airways, and United Airlines from Istanbul Airport to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,977 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,977 reviews
Delta
8.0
Very good
7,977 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Qatar Airways
7.4
Good
3,609 reviews
Delta
8.0
Very good
7,977 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,899 reviews
Delta
8.0
Very good
7,977 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
JetBlue
7.3
Good
2,913 reviews
Delta
8.0
Very good
7,977 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,977 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

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

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

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

    For one-way options, check prices for Qatar Airways. According to our data, you can fly for as low as $640. Users have also found prices from $646 and $650 on British Airways and American Airlines, respectively.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Istanbul Airport to Ontario (average of $246). Flying from Istanbul Airport to Ontario in March is currently the most expensive (average of $328). 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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