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Bismarck

$269+ Cheap flights from Ontario to Bismarck (ONT - BIS)

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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BIS
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Ontario to Bismarck

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Bismarck (BIS). 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 September 11, 2025.

Round-trip from

$269
(American Airlines)

Popular in

April

Cheapest in

May

Average price

$406
From Ontario to Bismarck
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Highest demand for flights based on searches. 13% potential increase in price ($78 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Bismarck

Cheapest flights from Ontario to Bismarck
Explore the most affordable flight options available from Ontario to Bismarck. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/8. 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.
Fri 10/312:45 pmONT - BIS
1 stop7h 41mAmerican Airlines
Tue 10/76:20 amBIS - ONT
1 stop7h 37mAmerican Airlines
Deal found 9/8$269
This United Airlines deal was found by Cheapflights users on 9/8. 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 10/39:36 amONT - BIS
2 stops10h 16mUnited Airlines
Tue 10/75:10 pmBIS - ONT
1 stop5h 14mUnited Airlines
Deal found 9/8$301
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2612:45 pmONT - BIS
1 stop7h 41mAmerican Airlines
Tue 9/302:32 pmBIS - ONT
1 stop6h 22mAmerican Airlines
Deal found 9/11$319
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Fri 9/261:15 pmONT - BIS
1 stop6h 37mUnited Airlines
Tue 9/301:58 pmBIS - ONT
2 stops10h 54mUnited Airlines
Deal found 9/11$324
This United Airlines deal was found by Cheapflights users on 9/8. 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 11/205:05 amONT - BIS
1 stop6h 06mUnited Airlines
Sun 11/235:15 pmBIS - ONT
1 stop5h 29mUnited Airlines
Deal found 9/8$441
This United Airlines deal was found by Cheapflights users on 9/8. 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 11/215:05 amONT - BIS
1 stop6h 06mUnited Airlines
Sun 11/235:15 pmBIS - ONT
1 stop5h 29mUnited Airlines
Deal found 9/8$483
This United Airlines deal was found by Cheapflights users on 9/9. 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 10/49:36 amONT - BIS
2 stops10h 16mUnited Airlines
Thu 10/96:00 amBIS - ONT
1 stop13h 23mUnited Airlines
Deal found 9/9$507
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Fri 10/311:40 pmONT - BIS
2 stops7h 59mUnited Airlines
Sun 11/25:15 pmBIS - ONT
1 stop5h 29mUnited Airlines
Deal found 9/11$549

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Bismarck 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 September 11, 2025.
Use the filters below to find and compare flights from Ontario to Bismarck that are best for you.

Fly from

Ontario

Fly to

Bismarck

Route

Depart

Return

Price

OntarioBismarck

ONT - BIS

ONTBIS

Ontario

Fri 10/3

12:45 pm-10:26 pm

1 stop7h 41m

Bismarck

Tue 10/7

6:20 am-11:57 am

1 stop7h 37m

$269

OntarioBismarck

ONT - BIS

ONTBIS

Ontario

Fri 10/3

9:36 am-9:52 pm

2 stops10h 16m

Bismarck

Tue 10/7

5:10 pm-8:24 pm

1 stop5h 14m

$301

OntarioBismarck

ONT - BIS

ONTBIS

Ontario

Fri 9/26

12:45 pm-10:26 pm

1 stop7h 41m

Bismarck

Tue 9/30

2:32 pm-6:54 pm

1 stop6h 22m

$319

OntarioBismarck

ONT - BIS

ONTBIS

Ontario

Fri 9/26

1:15 pm-9:52 pm

1 stop6h 37m

Bismarck

Tue 9/30

1:58 pm-10:52 pm

2 stops10h 54m

$324

OntarioBismarck

ONT - BIS

ONTBIS

Ontario

Thu 11/20

5:05 am-1:11 pm

1 stop6h 06m

Bismarck

Sun 11/23

5:15 pm-8:44 pm

1 stop5h 29m

$441

OntarioBismarck

ONT - BIS

ONTBIS

Ontario

Fri 11/21

5:05 am-1:11 pm

1 stop6h 06m

Bismarck

Sun 11/23

5:15 pm-8:44 pm

1 stop5h 29m

$483

OntarioBismarck

ONT - BIS

ONTBIS

Ontario

Sat 10/4

9:36 am-9:52 pm

2 stops10h 16m

Bismarck

Thu 10/9

6:00 am-5:23 pm

1 stop13h 23m

$507

OntarioBismarck

ONT - BIS

ONTBIS

Ontario

Fri 10/31

1:40 pm-11:39 pm

2 stops7h 59m

Bismarck

Sun 11/2

5:15 pm-8:44 pm

1 stop5h 29m

$549

OntarioBismarck

ONT - BIS

ONTBIS

Ontario

Wed 11/26

6:00 am-1:11 pm

2 stops29h 11m

$300

OntarioBismarck

ONT - BIS

ONTBIS

Ontario

Sat 11/22

5:05 am-1:11 pm

1 stop6h 06m

$332

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 12 results
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Best time to book a flight from Ontario to Bismarck

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

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

Currently, August is the cheapest month in which you can book a flight from Ontario to Bismarck (average of $346). Flying from Ontario to Bismarck in June is currently the most expensive (average of $426). 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 Bismarck

Get insights into the airlines that provide service to Bismarck. 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 Bismarck. Reviews last updated September 11, 2025.
See what other customers who have flown with United Airlines from Ontario to Bismarck have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Kathy,Jun 2024

RDD - SFO

United has consistently been good. Every now and then there is a crew member that should probably retire, but most of them are excellent.
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Kathy,Jun 2024

RDD - SFO

United has consistently been good. Every now and then there is a crew member that should probably retire, but most of them are excellent.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Bismarck. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Bismarck?

    There are many flights that can get you from Ontario to Bismarck in 7h 41m. Fly via American Airlines or United Airlines to get the fastest option. The distance from Ontario to Bismarck is about 1242 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 Bismarck round-trip?

    Cheapflights users have booked flights from Ontario to Bismarck round-trip from $319.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Ontario to Bismarck (average of $346). Flying from Ontario to Bismarck in June is currently the most expensive (average of $426). 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 Bismarck

Discover the top airline that operate flights from Ontario to Bismarck. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$319Average$380FlexibilityNo cancel feeOn-time69%

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