HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$345+ Cheap flights from Bismarck to Ontario (BIS - ONT)

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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
BIS — ONT
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Bismarck to Ontario 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 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 January 27, 2026.

This United Airlines deal was found by Cheapflights users on 1/25. 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 4/155:05 pm
BIS
-
ONT
1 stop5h 31m
United Airlines
Tue 4/215:10 am
ONT
-
BIS
1 stop5h 48m
United Airlines
Deal found 1/25$380
This United Airlines deal was found by Cheapflights users on 1/25. 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 4/165:05 pm
BIS
-
ONT
1 stop5h 31m
United Airlines
Tue 4/215:10 am
ONT
-
BIS
1 stop5h 48m
United Airlines
Deal found 1/25$409
This United Airlines deal was found by Cheapflights users on 1/25. 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 4/155:05 pm
BIS
-
ONT
1 stop5h 31m
United Airlines
Sun 4/195:10 am
ONT
-
BIS
1 stop5h 48m
United Airlines
Deal found 1/25$415
This United Airlines deal was found by Cheapflights users on 1/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/15:10 pm
BIS
-
ONT
1 stop5h 48m
United Airlines
Sat 2/75:05 am
ONT
-
BIS
1 stop5h 46m
United Airlines
Deal found 1/27$426
This United Airlines deal was found by Cheapflights users on 1/25. 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 4/165:05 pm
BIS
-
ONT
1 stop5h 31m
United Airlines
Sun 4/195:10 am
ONT
-
BIS
1 stop5h 48m
United Airlines
Deal found 1/25$444
This American Airlines deal was found by Cheapflights users on 1/25. 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 2/62:58 pm
BIS
-
ONT
1 stop9h 50m
American Airlines
Wed 2/116:00 am
ONT
-
BIS
1 stop6h 24m
American Airlines
Deal found 1/25$493
This United Airlines deal was found by Cheapflights users on 1/25. 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 4/165:05 pm
BIS
-
ONT
1 stop5h 31m
United Airlines
Mon 4/205:10 am
ONT
-
BIS
1 stop5h 48m
United Airlines
Deal found 1/25$509
This United Airlines deal was found by Cheapflights users on 1/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/199:13 am
BIS
-
ONT
1 stop5h 30m
United Airlines
Mon 2/235:00 am
ONT
-
BIS
1 stop5h 56m
United Airlines
Deal found 1/27$544
This United Airlines deal was found by Cheapflights users on 1/26. 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 4/306:00 am
BIS
-
ONT
2 stops8h 22m
United Airlines
Thu 5/75:00 am
ONT
-
BIS
1 stop6h 03m
United Airlines
Deal found 1/26$549

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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$380
(United Airlines)

One-way from

$345
(United Airlines)

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
One-way flight from Bismarck to Ontario
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($86 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 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 January 27, 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

Wed 4/15

5:05 pm-8:36 pm

1 stop5h 31m

Ontario

Tue 4/21

5:10 am-12:58 pm

1 stop5h 48m

$380

BismarckOntario

BIS - ONT

BISONT

Bismarck

Thu 4/16

5:05 pm-8:36 pm

1 stop5h 31m

Ontario

Tue 4/21

5:10 am-12:58 pm

1 stop5h 48m

$409

BismarckOntario

BIS - ONT

BISONT

Bismarck

Fri 4/17

5:05 pm-8:36 pm

1 stop5h 31m

Ontario

Tue 4/21

5:10 am-12:58 pm

1 stop5h 48m

$409

BismarckOntario

BIS - ONT

BISONT

Bismarck

Fri 4/17

5:17 pm-11:44 pm

2 stops8h 27m

Ontario

Tue 4/21

7:00 am-7:35 pm

2 stops10h 35m

$415

BismarckOntario

BIS - ONT

BISONT

Bismarck

Wed 4/15

5:05 pm-8:36 pm

1 stop5h 31m

Ontario

Sun 4/19

5:10 am-12:58 pm

1 stop5h 48m

$415

BismarckOntario

BIS - ONT

BISONT

Bismarck

Fri 4/17

5:05 pm-8:36 pm

1 stop5h 31m

Ontario

Sun 4/19

5:10 am-12:58 pm

1 stop5h 48m

$444

BismarckOntario

BIS - ONT

BISONT

Bismarck

Fri 2/6

2:58 pm-10:48 pm

1 stop9h 50m

Ontario

Wed 2/11

6:00 am-2:24 pm

1 stop6h 24m

$493

BismarckOntario

BIS - ONT

BISONT

Bismarck

Thu 4/16

5:05 pm-8:36 pm

1 stop5h 31m

Ontario

Mon 4/20

5:10 am-12:58 pm

1 stop5h 48m

$509

BismarckOntario

BIS - ONT

BISONT

Bismarck

Tue 5/19

5:03 pm-8:36 pm

1 stop5h 33m

Ontario

Tue 6/2

1:00 pm-8:03 pm

1 stop5h 03m

$544

BismarckOntario

BIS - ONT

BISONT

Bismarck

Thu 2/19

9:13 am-12:43 pm

1 stop5h 30m

Ontario

Mon 2/23

5:00 am-12:56 pm

1 stop5h 56m

$544

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Showing 1-10 of 13 results
1
2

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 Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*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 FlightHub the most. FlightHub 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 January 27, 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
9,205 reviews

Overall

7.4

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Crew

8.1

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
9,205 reviews
United Airlines
7.4
Good
9,205 reviews

Overall

7.4

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Crew

8.1

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 $380, United Airlines can have you in Ontario from Bismarck in 5h 31m. 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

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 Bismarck to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Fargo to Las Vegas flights
Fargo to Los Angeles flights
Fargo to Palm Springs flights
Fargo to San Diego flights
Minot to Santa Ana flights
Bismarck to Las Vegas flights
Bismarck to Los Angeles flights
Minot to Las Vegas flights
Bismarck to San Diego flights
Fargo to San Francisco flights
Williston to Las Vegas flights
Fargo to Fresno flights
Fargo to Ontario flights
Fargo to Reno flights
Minot to Los Angeles flights
Grand Forks to Las Vegas flights
Fargo to Sacramento flights
Fargo to Santa Ana flights
Bismarck to Sacramento flights
Minot to Sacramento flights
Grand Forks to Los Angeles flights
Fargo to Burbank flights
Bismarck to San Francisco flights
Bismarck to Reno flights
Grand Forks to San Diego flights
Dickinson to Las Vegas flights
Jamestown to Las Vegas flights
Fargo to Long Beach flights
Fargo to San Jose flights
Minot to San Diego flights
Bismarck to Santa Ana flights
Dickinson to San Jose flights
Minot to San Francisco flights
Fargo to Medford flights
Minot to Burbank flights
Fargo to San Luis Obispo flights
Jamestown to Reno flights
Grand Forks to Santa Ana flights
Fargo to Bakersfield flights
Grand Forks to Reno flights
Fargo to Santa Barbara flights
Jamestown to Los Angeles flights
Dickinson to Los Angeles flights
Dickinson to Ontario flights
Bismarck to Bakersfield flights

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 January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$341Average$527FlexibilityNo 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.