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$339+ Cheap flights from Bismarck to Ontario (BIS - 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 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
BIS — ONT
feb. 20 — feb. 271
vie. 2/20
vie. 2/27
1 adult, Economy
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Cheap flight deals from Bismarck to Ontario

Cheapest flights from Bismarck to Ontario
Explore the most affordable flight options available from Bismarck to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 21, 2026.

This United Airlines deal was found by Cheapflights users on 1/21. 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.
jue. 2/55:10 pm
BIS
-
ONT
1 stop5h 48m
United Airlines
lun. 2/95:05 am
ONT
-
BIS
1 stop5h 46m
United Airlines
Deal found 1/21$339
This Delta deal was found by Cheapflights users on 1/21. 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.
jue. 2/51:31 pm
BIS
-
ONT
2 stops12h 27m
Delta
lun. 2/91:11 pm
ONT
-
BIS
2 stops8h 15m
Delta
Deal found 1/21$350
This United Airlines deal was found by Cheapflights users on 1/20. 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.
jue. 2/55:10 pm
BIS
-
ONT
1 stop5h 48m
United Airlines
mar. 2/101:24 pm
ONT
-
BIS
1 stop8h 06m
United Airlines
Deal found 1/20$424
This United Airlines deal was found by Cheapflights users on 1/21. 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.
sáb. 1/249:00 am
BIS
-
ONT
1 stop5h 47m
United Airlines
mar. 1/271:24 pm
ONT
-
BIS
1 stop8h 06m
United Airlines
Deal found 1/21$463
This United Airlines deal was found by Cheapflights users on 1/20. 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.
vie. 2/65:10 pm
BIS
-
ONT
1 stop5h 48m
United Airlines
dom. 2/85:05 am
ONT
-
BIS
1 stop5h 46m
United Airlines
Deal found 1/20$560
This United Airlines deal was found by Cheapflights users on 1/21. 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.
lun. 3/238:00 am
BIS
-
ONT
1 stop6h 48m
United Airlines
lun. 3/305:10 am
ONT
-
BIS
1 stop5h 48m
United Airlines
Deal found 1/21$627

Find flight deals from Bismarck to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Bismarck (BIS) 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 enero 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$325
(Delta)

Popular in

November

Cheapest in

August

Average price

$346
Provider with most accurate pricing for Bismarck-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Bismarck-Ontario flights.
Search Deals
From Bismarck to Ontario
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($88 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Bismarck 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 enero 21, 2026.
Use the filters below to find and compare flights from Bismarck to Ontario that are best for you.

Fly from

Bismarck

Fly to

Ontario

Route

Depart

Return

Price

BismarckOntario

BIS - ONT

BISONT

Bismarck

jue. 2/5

1:35 pm-10:53 pm

2 stops11h 18m

Ontario

lun. 2/9

5:05 am-12:51 pm

1 stop5h 46m

$344

BismarckOntario

BIS - ONT

BISONT

Bismarck

jue. 2/5

1:31 pm-11:58 pm

2 stops12h 27m

Ontario

lun. 2/9

1:11 pm-11:26 pm

2 stops8h 15m

$350

BismarckOntario

BIS - ONT

BISONT

Bismarck

jue. 2/5

5:10 pm-8:58 pm

1 stop5h 48m

Ontario

mar. 2/10

1:24 pm-11:30 pm

1 stop8h 06m

$424

BismarckOntario

BIS - ONT

BISONT

Bismarck

vie. 2/6

5:10 pm-8:58 pm

1 stop5h 48m

Ontario

dom. 2/8

5:05 am-12:51 pm

1 stop5h 46m

$560

BismarckOntario

BIS - ONT

BISONT

Bismarck

lun. 3/23

8:00 am-12:48 pm

1 stop6h 48m

Ontario

lun. 3/30

5:10 am-12:58 pm

1 stop5h 48m

$627

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Compare providers for flights from Bismarck to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Bismarck to Ontario in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Bismarck-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Bismarck-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Bismarck-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Bismarck-Ontario flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Bismarck-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Bismarck to Ontario

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

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

Currently, March is the cheapest month in which you can book a flight from Bismarck to Ontario (average of $242). Flying from Bismarck to Ontario in November is currently the most expensive (average of $381). 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 enero 21, 2026.
Peruse reviews from past customers who have flown with United Airlines from Bismarck to Ontario 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
9,191 reviews

Crew

8.1

Comfort

7.3

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
9,191 reviews
United Airlines
7.4
Good
9,191 reviews

Crew

8.1

Comfort

7.3

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

Find useful and relevant information for your journey from Bismarck to Ontario. 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 Bismarck to Ontario?

    For as low as $344, United Airlines can have you in Ontario from Bismarck in 11h 18m. The distance between Bismarck and Ontario is about 1242 mi. This flight may include one or multiple stops.

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

    Flying on United Airlines is currently your cheapest option to Ontario, with prices starting at $341.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Bismarck to Ontario (average of $242). Flying from Bismarck to Ontario in November is currently the most expensive (average of $381). 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 Bismarck to Ontario

Discover the top airline that operate flights from Bismarck to Ontario. 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 enero 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$341Average$527FlexibilityNo cancel feeOn-time69%

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